CN221842003U - Half-wave reverse-folding directional microwave detection antenna capable of inhibiting frequency offset - Google Patents

Abstract

The utility model provides a half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset, which comprises a half-wave oscillator, a reference ground and a conductive inhibitor, wherein the half-wave oscillator is arranged in a state that the distance between two ends of the half-wave oscillator and the reference ground is greater than or equal to lambda/128 and the distance between at least one end of the half-wave oscillator and the reference ground is less than or equal to lambda/6, and the conductive inhibitor is arranged between the half-wave oscillator and the reference ground in a state of being spaced from the half-wave oscillator and is grounded, so that the distribution range of an excitation electric field of the half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset in the lateral direction of the directional radiation direction is reduced, and the deviation of a working center frequency point of the half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset when being applied to a product form is inhibited.

Description

Half-wave reverse-folding directional microwave detection antenna capable of inhibiting frequency offset

Technical Field

The utility model relates to the field of microwave detection, in particular to a half-wave reverse-folded directional microwave detection antenna capable of inhibiting frequency offset.

Background

The microwave detection technology works based on the microwave Doppler effect principle, can detect the movement of a target space to judge whether a human body enters and exists in the target space, so that a moving object is detected under the condition of not invading the privacy of the human body, and the microwave detection technology can be used as an important junction between the human body and the object, and is applied to behavior detection and existence detection, thereby having wide application prospect. The prior microwave detectors are mainly divided into a microwave detector of a columnar radiation source structure and a microwave detector of a flat radiation source structure according to the structure of the radiation source, wherein in the structure, the columnar radiation source of the microwave detector of the columnar radiation source structure is vertical to the reference ground, and the microwave detector of the columnar radiation source structure is easy to occupy larger installation space in actual installation relative to the microwave detector of the flat radiation source structure which tends to be of a flat plate structure, so that under the trend of pursuing small and compact appearance aesthetic, the microwave detector of the flat radiation source structure is favored by virtue of small occupied space and relative stability, however, the microwave detector of the flat radiation source structure has certain size requirements on the flat radiation source, so that the area of the reference ground of the microwave detector has certain size requirements on the basis of meeting the structure larger than the area of the flat radiation source. Therefore, when the installation scene of the occupation space of the microwave detector of the columnar radiation source structure in the columnar radiation source direction is not considered, the microwave detector of the columnar radiation source structure can occupy smaller installation space relative to the microwave detector of the flat panel radiation source structure, however, the microwave detector of the columnar radiation source structure has larger backward lobe and detection dead zone, so that the actual detection area of the microwave detector of the columnar radiation source structure is difficult to match with the target space area.

Aiming at the defects of the existing microwave detectors of the columnar radiation source structure and the existing microwave detectors of the flat plate radiation source structure, the inventor newly develops a novel antenna with the patent application number of CN202110477994.6 and the name of half-wave folded directional microwave detection antenna, the half-wave folded directional microwave detection antenna can generate directional radiation and has obvious resonance frequency points, under the same area condition of the reference ground, the gain of the half-wave folded directional microwave detection antenna in the direction of the directional radiation can be increased in multiple relative to the microwave detectors of the columnar radiation source structure, meanwhile, the two ends of the half-wave vibrators of the half-wave folded directional microwave detection antenna can be mutually coupled, the energy of direct coupling between the ends of the half-wave vibrators and the reference ground can be reduced, the area requirement on the reference ground is reduced, the miniaturization of the half-wave folded directional microwave detection antenna is realized, and the defects of the existing microwave detectors of the columnar radiation source structure and the microwave detectors of the flat plate radiation source structure are solved.

The half-wave reverse-folded directional microwave detection antenna has obvious resonant frequency points, good frequency selection characteristics, extremely narrow frequency point width at the resonant frequency points, excellent frequency selection characteristics corresponding to the half-wave reverse-folded directional microwave detection antenna, strong anti-interference capability, capability of resisting external electromagnetic radiation interference based on excellent frequency selection characteristics, and superior performance. However, in the production process of the half-wave reverse-folded directional microwave detection antenna, when the half-wave reverse-folded directional microwave detection antenna is installed in a product form (such as a lamp, a microwave sensing device), the actual frequency point of the existing half-wave reverse-folded directional microwave detection antenna is obviously offset due to the influence of a product shell, a lamp panel, a circuit board and the like, so that the instability of the actual working performance is caused.

Referring specifically to fig. 1A and 1B, when the half-wave folded directional microwave probe antenna is independently disposed, the center frequency point is 5.87GHz, and when the half-wave folded directional microwave probe antenna is mounted in a corresponding housing, the center frequency point is shifted by 5.82GHz, which is shifted by 50MHz, the uncertainty of the half-wave folded directional microwave probe antenna in practical application is increased due to excessive frequency offset, and when the half-wave folded directional microwave probe antenna is applied to different product forms, the practical performance thereof is more difficult to control.

Disclosure of utility model

An object of the present utility model is to provide a half-wave folded directional microwave probe antenna capable of suppressing frequency offset, wherein the half-wave folded directional microwave probe antenna capable of suppressing frequency offset can solve the drawbacks of the existing half-wave folded directional microwave probe antenna, and can suppress the offset of the actual operating frequency point due to a product housing, a board, etc. when the antenna is applied to a product form, and improve the performance stability of the half-wave folded directional microwave probe antenna capable of suppressing frequency offset.

The utility model further aims to provide a half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset, wherein when the half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset is applied to a product form, the frequency offset generated by the half-wave reverse-turn type directional microwave detection antenna is reduced relative to that generated by the existing half-wave reverse-turn type directional microwave detection antenna, so that the control of the actual performance of the half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset is facilitated to be enhanced, and the quality control of an actual product is enhanced.

The utility model further aims to provide a half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset, wherein when the half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset is applied to a product form, the frequency offset generated by the half-wave reverse-turn type directional microwave detection antenna is reduced relative to the frequency offset generated by the existing half-wave reverse-turn type directional microwave detection antenna, so that the product quality control of the half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset is ensured, and the consistency of the half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset in mass production is ensured.

Another object of the present utility model is to provide a half-wave folded directional microwave probe antenna capable of suppressing frequency offset, where the half-wave folded directional microwave probe antenna capable of suppressing frequency offset can also ensure normal working performance while suppressing frequency offset, so as to be beneficial to ensuring advantages of the half-wave folded directional microwave probe antenna in terms of probe distance and probe sensitivity.

The utility model further aims to provide a half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset, wherein the half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset comprises a half-wave oscillator, a reference ground and a conductive inhibitor, wherein the conductive inhibitor is arranged between the half-wave oscillator and the reference ground in a state of being separated from the half-wave oscillator and is electrically connected to the reference ground, so that the reference ground is equivalently lifted based on the conduction effect of the conductive inhibitor, the excitation electric field energy of the half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset is discharged to the reference ground in the lateral direction of a directional radiation direction (the direction perpendicular to the reference ground), and the excitation electric field distribution of the half-wave reverse-turn type directional microwave detection antenna is changed, so that the excitation electric field distribution range in the lateral direction of the directional radiation direction is reduced, when the half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset is applied to a product form, the electric field line of the excitation electric field reaches a corresponding shell, or the proportion of the reference ground is reduced, and the half-wave reverse-turn type directional microwave detection antenna capable of inhibiting frequency offset is affected by the corresponding to the microwave frequency reverse-turn type directional microwave detection antenna, and the microwave detection antenna capable of inhibiting frequency offset is subjected to the corresponding to the product form, and the microwave frequency offset can be inhibited by the corresponding to the half-wave reverse-turn type directional microwave detection antenna.

Another object of the present utility model is to provide a half-wave folded directional microwave probe antenna capable of suppressing a frequency offset, where an excitation electric field of the half-wave folded directional microwave probe antenna capable of suppressing a frequency offset in a lateral direction of a directional radiation direction is suppressed by the conductive suppressing body and is distributed between the half-wave vibrator and the conductive suppressing body, so that a distribution range of the excitation electric field is narrowed based on a setting of the conductive suppressing body, so as to suppress a frequency offset when the half-wave folded directional microwave probe antenna capable of suppressing a frequency offset is applied to a product form, and for example, an ISM operating frequency band of 5.8GHz, the frequency offset when the half-wave folded directional microwave probe antenna capable of suppressing a frequency offset is applied to a product form can be controlled within 30MHz, which is beneficial to guaranteeing a performance control of the half-wave folded directional microwave probe antenna capable of suppressing a frequency offset when the half-wave folded directional microwave probe antenna capable of suppressing a frequency offset is applied to a specific product form.

According to one aspect of the present utility model, there is provided a half-wave folded directional microwave probe antenna capable of suppressing frequency offset, wherein the half-wave folded directional microwave probe antenna capable of suppressing frequency offset comprises:

A half-wave vibrator, wherein the half-wave vibrator has an electrical length of 1/2 or more and 3/4 or less, wherein the half-wave vibrator is folded back to form a state in which a distance between both ends thereof is equal to or greater than λ/128 and equal to or less than λ/4, wherein the half-wave vibrator has a feeding point, wherein the feeding point is spaced from one end of the half-wave vibrator by a distance smaller than the other end, wherein λ is a wavelength parameter corresponding to a frequency of the excitation signal;

A feeder line, wherein one end of the feeder line is electrically connected to the feeding point, so as to feed the half-wave vibrator at the feeding point when the feeder line is electrically coupled to a corresponding excitation source at the other end thereof to access a corresponding excitation signal;

A reference ground, wherein the half-wave vibrator is provided in a state in which a distance between both ends thereof and the reference ground is equal to or greater than λ/128, and in which a distance between at least one end thereof and the reference ground is equal to or less than λ/6; and

The conductive suppressing body is arranged between the half-wave oscillator and the reference ground in a state of being spaced from the half-wave oscillator and is grounded, so that the excitation electric field distribution of the half-wave reverse-folded directional microwave detection antenna in the lateral direction of the directional radiation direction is reduced, and the frequency deviation of the half-wave reverse-folded directional microwave detection antenna when applied to a product form is suppressed.

In an embodiment, the conductive inhibitor is arranged in the form of a sheet-like conductive layer and is arranged between the half-wave vibrator and the reference ground.

In an embodiment, the conductive suppressing body is arranged in a conductive fence form and is arranged at a lateral direction of the half-wave vibrator, wherein a height of the conductive suppressing body is smaller than or equal to a distance between the half-wave vibrator and the reference ground.

In an embodiment, the conductive suppressing body disposed in the form of a conductive fence is provided with an opening in a polarization direction along the half-wave oscillator with the feeding point as the polarization direction.

In an embodiment, one end of the half-wave vibrator close to the feeding point is named as a feeding end of the half-wave vibrator, wherein a distance between the feeding end of the half-wave vibrator and the reference ground is smaller than or equal to a distance between the other end of the half-wave vibrator and the reference ground.

In an embodiment, the feeding point is located at the feeding end.

In an embodiment, wherein the feed line has a 1/128 or more and 1/4 or less wavelength electrical length.

In an embodiment, wherein the half-wave folded directional microwave probe antenna further comprises a circuit substrate, wherein the reference ground is carried on the circuit substrate, wherein an end of the feed line that accesses the excitation signal is fixed to the circuit substrate.

In an embodiment, the half-wave folded directional microwave probe antenna further includes a ground wire, wherein the ground wire extends from the feeding end and is electrically connected to the reference ground, so that the half-wave oscillator is grounded.

In an embodiment, the half-wave folded directional microwave probe antenna further includes a stub load, wherein the stub load is electrically connected to the half-wave oscillator, so as to be loaded on the half-wave oscillator between two ends of the half-wave oscillator.

Further objects and advantages of the present utility model will become fully apparent from the following description and the accompanying drawings.

Drawings

Fig. 1A is a schematic structural diagram of a conventional half-wave reverse-folded directional microwave probe antenna, and an S11 curve and a radiation pattern corresponding to the structure.

Fig. 1B is a schematic structural diagram of a conventional half-wave folded directional microwave probe antenna mounted on a corresponding housing, and S11 curve and radiation pattern corresponding to the structure.

Fig. 2A is a schematic structural diagram of a half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to an embodiment of the utility model.

Fig. 2B is an S11 curve of the half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to the above embodiment of the utility model.

Fig. 2C is a radiation pattern of the half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to the above embodiment of the present utility model.

Fig. 2D is a two-dimensional radiation pattern of the half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to the above embodiment of the utility model.

Fig. 3 is a schematic structural diagram of the half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to the above embodiment of the present utility model, which is mounted on a corresponding housing, and an S11 curve and a radiation pattern corresponding to the structure.

Fig. 4A is a schematic diagram of a modified structure of the half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to the above embodiment of the utility model.

Fig. 4B is an S11 curve of the modified structure of the half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to the above embodiment of the utility model.

Fig. 4C is a radiation pattern of the modified structure of the half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to the above embodiment of the utility model.

Fig. 4D is a two-dimensional radiation pattern of the modified structure of the half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to the above embodiment of the present utility model.

Fig. 5 is a schematic diagram of a modified structure of the half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to the above embodiment of the utility model.

Fig. 6A is a schematic diagram of a modified structure of the half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to the above embodiment of the utility model.

Fig. 6B is an S11 curve of the modified structure of the half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to the above embodiment of the utility model.

Fig. 6C is a radiation pattern of the modified structure of the half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to the above embodiment of the present utility model.

Fig. 6D is a two-dimensional radiation pattern of the modified structure of the half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to the above embodiment of the present utility model.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present utility model.

It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.

The utility model provides a half-wave reverse-turn type directional microwave detection antenna capable of suppressing frequency offset, referring to fig. 2A to 2D of the drawings in the specification of the utility model, the structure of the half-wave reverse-turn type directional microwave detection antenna 10 capable of suppressing frequency offset and an S11 curve and a radiation pattern corresponding to the structure according to an embodiment of the utility model are respectively illustrated, specifically, the half-wave reverse-turn type directional microwave detection antenna 10 capable of suppressing frequency offset is further provided with a conductive inhibitor 13 on the basis of the traditional half-wave reverse-turn type directional microwave detection antenna, the half-wave reverse-turn type directional microwave detection antenna 10 capable of suppressing frequency offset comprises a half-wave oscillator 11, a reference ground 12 and the conductive inhibitor 13, wherein the half-wave oscillator 11 has an electrical length of more than or equal to 1/2 and less than or equal to 3/4 wavelength, wherein the half-wave vibrator 11 is folded back to form a state in which a distance between both ends thereof is equal to or greater than λ/128 and equal to or less than λ/4, wherein the half-wave vibrator 11 has a feeding point 110, wherein a distance between the feeding point 110 and one end of the half-wave vibrator 11 is smaller than a distance between the other end thereof to form a state in which the half-wave vibrator 11 is fed by being connected to a corresponding excitation signal at the feeding point 110, both ends of the half-wave vibrator 11 are capable of forming phase differences tending to be coupled to each other in opposite directions, wherein λ is a wavelength parameter corresponding to a frequency of the excitation signal, wherein the half-wave vibrator 11 is set in a state in which a distance between both ends thereof and the reference ground 12 is equal to or greater than λ/128, and wherein a distance between at least one end thereof and the reference ground 12 is equal to or less than λ/6, wherein the conductive suppressing body 13 is disposed between the half-wave vibrator 11 and the reference ground 12 in a state of being spaced apart from the half-wave vibrator 11 and is grounded to equivalently raise the reference ground 12, thereby reducing the excitation electric field distribution of the half-wave folded-back type directional microwave detecting antenna 10 capable of suppressing frequency offset in the lateral direction of the directional radiation direction (the direction perpendicular to the reference ground), so as to suppress the frequency offset when the half-wave folded-back type directional microwave detecting antenna 10 capable of suppressing frequency offset is applied to the product form, that is, suppress the shift of the center frequency point of the resonance frequency of the half-wave folded-back type directional microwave detecting antenna 10 capable of suppressing frequency offset.

In particular, in this structure illustrated in the present utility model, one end of the half-wave resonator 11 near the feeding point 110 is named as a feeding end 111 of the half-wave resonator 11, wherein a distance between the feeding end 111 of the half-wave resonator 11 and the reference ground 12 is equal to or smaller than a distance between the other end and the reference ground 12, and the feeding point 110 is located at the feeding end 111, wherein the half-wave folded directional microwave probe antenna 10 capable of suppressing frequency offset further includes a feeding line 14, wherein one end of the feeding line 14 is electrically connected to the feeding end 111 of the half-wave resonator 11, wherein the feeding line 14 has an electrical length of 1/128 or more and 1/4 or less wavelength, so that the half-wave resonator 11 is fed at the feeding end 111 when the feeding line 14 is electrically coupled at the other end thereof with a corresponding excitation source to access the excitation signal. The half-wave oscillator 11 is further loaded with a branch load 15, specifically, the branch load 15 is loaded in the middle of the half-wave oscillator 11, so that tuning of the half-wave folded directional microwave detection antenna 10 capable of suppressing frequency offset is formed based on the branch load 15, so that a resonance frequency point of the half-wave folded directional microwave detection antenna 10 can be debugged to be matched with a corresponding working frequency point.

Further, in this structure of the present utility model, wherein the conductive suppressing body 13 is disposed in a conductive fence form and wound around a lateral direction of the half-wave oscillator 11, in detail, wherein the half-wave folded-back directional microwave probe antenna 10 capable of suppressing frequency offset includes a circuit substrate 16, wherein the half-wave oscillator 11 is mounted on the circuit substrate 16, wherein one end of the power feeding line 14, which is connected to the excitation signal, is fixed to the circuit substrate 16, is electrically coupled to a corresponding excitation source to connect the excitation signal on one hand, and forms a support for the half-wave oscillator 11 to mount the half-wave oscillator 11 on the circuit substrate 16 on the other hand, wherein the reference ground 12 is carried on a side of the circuit substrate 16 facing the half-wave oscillator 11 in a metal conductive layer form, and the conductive suppressing body 13 extends upward from the reference ground 12 toward the half-wave oscillator 11 to be wound around a lateral direction of the half-wave oscillator 11, and is grounded in a state of being electrically connected to the reference ground 12. And the reference ground 12 is equivalently lifted based on the conduction effect of the conduction inhibitor 13, the excitation electric field energy of the half-wave folded directional microwave detection antenna 10 capable of inhibiting frequency offset in the lateral direction of the directional radiation direction is led back to the reference ground 12, so that the excitation electric field distribution of the half-wave folded directional microwave detection antenna 10 is changed, the excitation electric field distribution range of the half-wave folded directional microwave detection antenna 10 capable of inhibiting frequency offset in the lateral direction of the directional radiation direction is reduced, and when the half-wave folded directional microwave detection antenna 10 capable of inhibiting frequency offset is applied to a product form, the proportion of the electric field lines of the excitation electric field reaching the corresponding shell, plate or mounting surface is reduced, and the deviation of the resonance frequency caused by the influence of the working frequency of the half-wave folded directional microwave detection antenna 10 capable of inhibiting frequency offset on the excitation electric field of the half-wave folded directional microwave detection antenna 10 by the shell, plate or the corresponding mounting surface is further reduced, so that the frequency offset of the frequency offset can be inhibited when the half-wave folded directional microwave detection antenna 10 is applied to the product form is inhibited.

Taking an ISM operation frequency band of 5.8GHz as an example, the center frequency point of the half-wave folded directional microwave probe antenna 10 capable of suppressing frequency offset is about 5.97GHz, and corresponding to fig. 3, when the half-wave folded directional microwave probe antenna 10 capable of suppressing frequency offset is mounted on a corresponding housing, the actual operation frequency point is about 5.94GHz, that is, the frequency offset of the half-wave folded directional microwave probe antenna 10 capable of suppressing frequency offset when the half-wave folded directional microwave probe antenna 10 capable of suppressing frequency offset is operated in the operation frequency band of 5.8GHz is controlled within 30MHz, which is beneficial to guaranteeing the performance control of the half-wave folded directional microwave probe antenna 10 capable of suppressing frequency offset when the half-wave folded directional microwave probe antenna 10 capable of suppressing frequency offset is applied to a specific product form.

It should be noted that, the half-wave folded directional microwave probe antenna 10 capable of suppressing the frequency offset can suppress the offset of the actual operating frequency point due to the product housing, the board and the like when being applied to the product form, so as to improve the performance stability of the half-wave folded directional microwave probe antenna 10 capable of suppressing the frequency offset, so that when the half-wave folded directional microwave probe antenna 10 capable of suppressing the frequency offset is applied to the product form, the frequency offset generated by the half-wave folded directional microwave probe antenna is reduced relative to the existing half-wave folded directional microwave probe antenna, which is beneficial to enhancing the control of the actual performance of the half-wave folded directional microwave probe antenna 10 capable of suppressing the frequency offset and enhancing the quality control of the actual product.

Particularly, when the half-wave reverse-folded directional microwave probe antenna 10 capable of suppressing the frequency offset is applied to a product form, the frequency offset generated by the half-wave reverse-folded directional microwave probe antenna is reduced relative to the existing half-wave reverse-folded directional microwave probe antenna, so that the product quality control of the half-wave reverse-folded directional microwave probe antenna 10 capable of suppressing the frequency offset is ensured, and the consistency of the half-wave reverse-folded directional microwave probe antenna capable of suppressing the frequency offset in mass production is ensured.

It should be noted that, the height of the conductive inhibitor 13 is smaller than or equal to the distance between the half-wave vibrator 11 and the reference ground 12, that is, the erection height of the half-wave vibrator 11 is higher than the height of the conductive inhibitor 13, or the lowest position of the half-wave vibrator 11 is at least flush with the highest position of the conductive inhibitor 13, so as to avoid that the conductive inhibitor 13 affects the normal radiation of the half-wave folded directional microwave detection antenna 10 capable of inhibiting frequency offset in the direction of directional radiation, corresponding to fig. 2C and 2D, the detection beam of the half-wave folded directional microwave detection antenna 10 capable of inhibiting frequency offset still tends to be circular in the state of being provided with the conductive inhibitor 13, and the half-wave folded directional microwave detection antenna 10 capable of inhibiting frequency offset has a radiation gain exceeding 6.3dB in the direction of directional radiation, and at the same time of inhibiting the frequency offset, the normal working performance thereof, thereby being beneficial to guaranteeing the advantages of the half-wave folded directional microwave detection antenna and the sensitivity.

Meanwhile, the half-wave reverse-folded directional microwave detection antenna 10 capable of inhibiting frequency offset still has obvious resonance frequency points while inhibiting frequency offset, and has good frequency selection characteristics corresponding to high Q value of the half-wave reverse-folded directional microwave detection antenna 10 capable of inhibiting frequency offset on the working frequency points, namely the half-wave reverse-folded directional microwave detection antenna 10 capable of inhibiting frequency offset still has good selectivity on received reflected echoes, so that the advantage of the half-wave reverse-folded directional microwave detection antenna on anti-interference performance is maintained.

Further, referring to fig. 4A to 4D of the drawings of the specification of the present utility model, a deformation structure of the half-wave folded directional microwave probe antenna 10 capable of suppressing frequency offset, and an S11 curve and a radiation pattern corresponding to the deformation structure are respectively illustrated, in this deformation structure, the half-wave folded directional microwave probe antenna 10 capable of suppressing frequency offset further includes a grounding wire 17 on the basis of the structure shown in fig. 2A, wherein the grounding wire 17 is led out from the feed end 111 of the half-wave vibrator 11 and is grounded to ground the half-wave vibrator 11, so as to facilitate reasonably widening the frequency bandwidth of the half-wave folded directional microwave probe antenna 10 capable of suppressing frequency offset, thereby improving the consistency of the half-wave folded directional microwave probe antenna 10 capable of suppressing frequency offset in mass production based on the widened frequency bandwidth within a reasonable range for different product positioning and market requirements.

Specifically, the ground wire 17 extends from the feeding end 111 directly and is bent to extend toward the reference ground 12, so as to be electrically connected to the reference ground 12, and is grounded in a state of being electrically connected to the reference ground 12, wherein the ground wire 17 is further arranged to form a support for the half-wave oscillator 11, so that the structural stability of the half-wave folded directional microwave probe antenna 10 capable of suppressing frequency offset is improved.

Particularly, in a state that the half-wave vibrator 11 is located at the feed end 111 and can suppress frequency offset, the working performance of the half-wave folded directional microwave detection antenna 10 capable of suppressing frequency offset can be ensured, the detection beam of the half-wave folded directional microwave detection antenna 10 capable of suppressing frequency offset can still tend to be round, the radiation gain exceeding 6dB is provided in the direction of directional radiation, and the advantages of the half-wave folded directional microwave detection antenna in terms of detection distance and detection sensitivity are maintained.

Further, in order to ensure that the conductive suppressing body 13 further ensures the matching of the installation of each component of the half-wave folded directional microwave probe antenna 10 capable of suppressing the frequency offset on the premise that the half-wave folded directional microwave probe antenna 10 capable of suppressing the frequency offset is formed to suppress the frequency offset when being applied to a product form, the conductive suppressing body 13 arranged in a conductive fence form is allowed to be provided with an opening 131, specifically, the conductive suppressing body 13 arranged in a conductive fence form is provided with the opening 131 in the polarization direction with the feeding point 110 along the direction of the half-wave oscillator 11, so that the conductive suppressing body 13 can be placed in the lateral direction of the half-wave oscillator 11 based on the opening 131 in a specific production process, specifically, after the half-wave oscillator 11 is arranged in a corresponding production process, the conductive suppressing body 13 is arranged on the half-wave oscillator 11 through the half-wave oscillator 11 based on the arrangement of the opening 131. It is particularly worth mentioning that, in the state that the half-wave vibrator 11 is loaded with the branch load 15, the opening 131 on the conductive inhibitor 13 is designed to enable the conductive inhibitor 13 to avoid the branch load 15, so that the isolation state of the conductive inhibitor 13 and the half-wave vibrator 11 is ensured.

Further, for the purpose of improving the structural stability of the half-wave folded-back directional microwave probe antenna 10 capable of suppressing the frequency offset, the present utility model can also form a structural limit for the half-wave oscillator 11 by means of the conductive suppressing body 13, referring specifically to fig. 5 of the drawings of the specification of the present utility model, on the basis of the structure shown in fig. 4A, a deformed structure of the half-wave folded-back directional microwave probe antenna 10 capable of suppressing the frequency offset is illustrated, in which the conductive suppressing body 13 has a clamping limit portion 132, wherein the ground wire 17 is clamped by the clamping limit portion 132, such that the half-wave oscillator 11 can be limited by the clamping limit portion 132 in a direction toward and/or parallel to the reference ground 12, that is, when the half-wave oscillator 11 is tilted left and right, the conductive suppressing body 13 can also be limited by the clamping limit portion 132 to the ground wire 17, while the conductive suppressing body 13 can also be grounded via the clamping limit portion 132 to the ground wire 17. Therefore, the conductive suppressing body 13, in which the conductive fence is provided, may be grounded either by being directly electrically connected to the reference ground 12 or by being grounded via the ground line 17, which is not limited in the present utility model, and in this structure corresponding to fig. 5, the conductive suppressing body 13 is both directly electrically connected to the reference ground 12 and clamps the ground line 17 via the clamping and limiting portion 132.

The lower part of the clamping limiting portion 132 is provided with a ground-leaving limiting hole 133, wherein the ground wire 17 extends from the feeding end 111 directly and is bent to extend toward the reference ground 12, and further extends toward the ground-leaving limiting hole 133 to penetrate into the ground-leaving limiting hole 133, so as to be limited by the ground-leaving limiting hole 133, so that the half-wave vibrator 11 is limited by the ground-leaving limiting hole 133 in a direction away from the reference ground 12, and structural stability of the half-wave reverse-folded directional microwave detection antenna 10 capable of inhibiting frequency offset is improved.

It is understood that the conductive suppressing body 13 has a requirement of conductivity, and the conductive suppressing body 13 may be implemented as a metal plate or a metal film, or may be a conductive layer formed on a non-metal material by electroplating, spraying, doping, or the like, which is not limited in the present utility model.

The conductive suppressing body 13 may be provided in other forms in some modified structures based on the purpose of the conductive suppressing body 13. Referring specifically to fig. 6A to 6D of the drawings of the specification of the present utility model, a modified structure of the half-wave back-folded directional microwave probe antenna 10 capable of suppressing frequency offset, and S11 curves and radiation patterns corresponding to the structure are respectively illustrated. In this modified structure, the conductive suppressing body 13 is provided in the form of a sheet-like conductive layer and is provided between the half-wave vibrator 11 and the reference ground 12, specifically wherein the conductive suppressing body 13 provided in the form of a sheet-like conductive layer can be bridged between the half-wave vibrator 11 and the reference ground 12 via a corresponding support column or the like, for example, fixed to the circuit substrate 16 by columnar conduction or the like and electrically connected to the reference ground 12 via a columnar conductor to be grounded.

Specifically, in this structure of the present utility model, the conductive suppressing body 13 disposed in the form of a sheet-like conductive layer is electrically connected to the ground line 17 and is grounded via the ground line 17, and is supported by the ground line 17, wherein the conductive suppressing body 13 disposed in the form of a sheet-like conductive layer is provided with two isolation holes corresponding to the power feeding line 14 and the branch load 15, wherein the power feeding line 14 and the branch load 15 are isolated from the conductive suppressing body 13 by passing through the isolation holes, so that the reference ground 12 is equivalently lifted up based on the ground conductive layer disposed between the half-wave vibrator 11 and the reference ground 12, so that in the state in which the half-wave vibrator 11 is fed, the excitation electric field energy in the lateral direction of the direction of radiation is discharged to the reference ground 12, and thus the excitation electric field distribution of the half-wave reverse-folded directional microwave probe antenna 10 for suppressing frequency offset in the lateral direction of the direction of radiation is reduced, so that when the power feeding line 14 and the branch load 15 pass through the isolation holes, the corresponding case-folded-type directional microwave probe antenna 10 for suppressing frequency offset is applied to the product, the frequency of the reverse-folded-wave directional microwave probe antenna for suppressing frequency offset is reduced, and the frequency of the reverse-folded-wave probe antenna for suppressing frequency of the corresponding to the case-type microwave probe antenna can reach the case-like shape of the product, and the microwave probe antenna for suppressing frequency of the frequency-folded-wave reverse-phase response antenna can reach the case-or the case-oriented microwave probe antenna, and thus the effect can be reduced, and the frequency-suppressed by the case-phase antenna.

And the performance of the half-wave folded directional microwave detection antenna 10 can be maintained while the frequency offset of the half-wave folded directional microwave detection antenna 10 capable of inhibiting the frequency offset is formed when the half-wave folded directional microwave detection antenna is applied to the product form, wherein the detection beam of the half-wave folded directional microwave detection antenna 10 capable of inhibiting the frequency offset can still tend to be round, has radiation gain exceeding 6.1dB in the direction of directional radiation, has obvious resonance frequency points, and is correspondingly beneficial to guaranteeing the advantages of the half-wave folded directional microwave detection antenna in terms of detection distance, detection sensitivity and anti-interference performance.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The objects of the present utility model have been fully and effectively achieved. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from the principles described.

Claims (10)

1. The half-wave reverse-folded directional microwave detection antenna capable of suppressing frequency offset is characterized by comprising:

A half-wave vibrator, wherein the half-wave vibrator has an electrical length of 1/2 or more and 3/4 or less, wherein the half-wave vibrator is folded back to form a state in which a distance between both ends thereof is equal to or greater than λ/128 and equal to or less than λ/4, wherein the half-wave vibrator has a feeding point, wherein the feeding point is spaced from one end of the half-wave vibrator by a distance smaller than the other end, wherein λ is a wavelength parameter corresponding to a frequency of a corresponding excitation signal;

A feeder line, wherein one end of the feeder line is electrically connected to the feeding point, so as to feed the half-wave vibrator at the feeding point when the feeder line is electrically coupled to a corresponding excitation source at the other end thereof to access a corresponding excitation signal;

A reference ground, wherein the half-wave vibrator is provided in a state in which a distance between both ends thereof and the reference ground is equal to or greater than λ/128, and in which a distance between at least one end thereof and the reference ground is equal to or less than λ/6; and

And a conductive suppressing body disposed between the half-wave vibrator and the reference ground in a state of being spaced apart from the half-wave vibrator and grounded.

2. The half-wave folded directional microwave probe antenna capable of suppressing a frequency offset according to claim 1, wherein the conductive suppressing body is provided in a form of a sheet-like conductive layer and is erected between the half-wave vibrator and the reference ground.

3. The half-wave folded directional microwave probe antenna capable of suppressing a frequency offset according to claim 1, wherein the conductive suppressing body is provided in a conductive fence form and is provided laterally to the half-wave vibrator, wherein a height of the conductive suppressing body is equal to or less than a distance between the half-wave vibrator and the reference ground.

4. The half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to claim 2, wherein the conductive suppressing body provided in a form of a conductive fence is opened with an opening in a polarization direction of the feeding point along a direction of the half-wave oscillator.

5. The half-wave folded directional microwave probe antenna capable of suppressing frequency offset according to any one of claims 2 to 4, wherein one end of the half-wave vibrator close to the feed point is named as a feed end of the half-wave vibrator, wherein a distance between the feed end of the half-wave vibrator and the reference ground is equal to or less than a distance between the other end of the half-wave vibrator and the reference ground.

6. The half wave reverse turn type directional microwave probe antenna capable of suppressing frequency offset according to claim 5, wherein the feeding point is located at the feeding end.

7. The half-wave, reverse-turn, directional microwave probe antenna capable of suppressing frequency offset of claim 6, wherein the feed line has a wavelength electrical length of 1/128 or more and 1/4 or less.

8. The half-wave folded directional microwave probe antenna capable of suppressing frequency offset of claim 7, wherein the half-wave folded directional microwave probe antenna further comprises a circuit substrate, wherein the reference ground is carried on the circuit substrate, wherein an end of the feed line that accesses the excitation signal is fixed to the circuit substrate.

9. The half-wave folded directional microwave probe antenna according to claim 8, wherein the half-wave folded directional microwave probe antenna further comprises a ground wire, wherein the ground wire extends from the feed end and is electrically connected to the reference ground, such that the half-wave vibrator is grounded.

10. The half-wave folded directional microwave probe antenna according to claim 8, wherein the half-wave folded directional microwave probe antenna further comprises a stub load, wherein the stub load is electrically connected to the half-wave vibrator to be loaded to the half-wave vibrator between both ends of the half-wave vibrator.