CN210040484U - Cavity filter capable of adjusting suppression degree of feedback surge - Google Patents
Cavity filter capable of adjusting suppression degree of feedback surge Download PDFInfo
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- CN210040484U CN210040484U CN201921022044.9U CN201921022044U CN210040484U CN 210040484 U CN210040484 U CN 210040484U CN 201921022044 U CN201921022044 U CN 201921022044U CN 210040484 U CN210040484 U CN 210040484U
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Abstract
The utility model discloses a cavity filter capable of adjusting the suppression degree of feedback surge, which comprises a base, a cover plate and wave-absorbing elements, wherein the base is internally provided with a resonance space for signal transmission, the resonance space is internally provided with an antenna port for receiving and transmitting signals, two sides of the resonance space are respectively provided with an output/input side for signal transmission, the base is respectively provided with feedback channels for signal feedback between the antenna port of the resonance space and the two output/input sides, each feedback channel is internally provided with the wave-absorbing elements for solving the convex wave condition of the feedback signals, the cover plate is provided with at least one groove corresponding to the position of the feedback channel, all the grooves are internally provided with at least one frequency regulator which extends to the feedback channel and can be adjusted in the feedback channel, the cavity filter can effectively filter the feedback signals, the surge suppression effect is improved.
Description
Technical Field
The utility model relates to a cavity filter field, specific is a cavity filter of adjustable feedback surge suppression degree.
Background
The present invention relates to a method for transmitting and receiving signals in a wireless or wired manner to achieve the purpose of signal transmission, and more particularly, to a method for transmitting and receiving signals in a wireless or wired manner, which is an important part of the communication industry, wherein a wireless communication channel is often a place that communication providers have to contend for, and because the channel resource is very limited, the communication providers of the communication industry providing transmission services all fully utilize the limited bandwidth resource to seek the best solution of communication capacity and communication quality.
While a general band-pass cavity filter (or duplexer) is used to pass energy in a certain frequency range and attenuate energy outside the frequency range to achieve the isolation effect, but the cavity filter cannot completely block energy of the stopband frequency, microwave engineers strive to reduce energy of frequencies outside the band-pass but often cause no stability of the propagation signal at the stopband frequency, so that designers readjust energy in the stopband frequency range by means of signal feedback, and the currently applied cavity filter (or duplexer) please refer to fig. 4 and 5, in which the conventional cavity filter a is provided with a resonance space a0 inside a base a1, and the resonance space a0 is provided with an antenna port a2 and two sides respectively provided with a signal output/input terminal A3, and while the cavity filter a performs filtering, the transmission signal is fed back through a designed feedback channel a4, this feedback may generate a convex wave B phenomenon, which interferes the frequency of the transmitting/receiving signal and affects the instability of the transmitting/receiving signal.
Therefore, how to solve the problem of unstable signal caused by interference of the convex wave when the cavity filter (duplexer) receives and transmits signals is a direction that is desired to be improved by related manufacturers in the industry and the present invention.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the embodiment of the present invention provides a cavity filter capable of adjusting the suppression degree of the feedback surge, which can adjust the suppression degree of the feedback surge to solve the technical problem that the signal is unstable due to the interference formed by the convex wave when the cavity filter (duplexer) receives and transmits the signal.
The embodiment of the application discloses: a cavity filter with adjustable snapback suppression, comprising:
the base is internally provided with a resonance space for signal transmission, an antenna port for receiving and transmitting signals is arranged in the resonance space, output/input sides for signal transmission are respectively arranged at two sides of the resonance space, and feedback channels for signal feedback are respectively arranged between the antenna port of the resonance space and the output/input sides at the two sides of the resonance space;
the cover plate is covered outside the resonance space of the base, and at least one groove corresponding to the position of the feedback channel is formed in the cover plate;
the wave absorbing element is arranged in the corresponding feedback channel and is used for inhibiting the generation of convex waves of the feedback signals;
at least one frequency regulator, which can movably penetrate through the groove and extend into the corresponding feedback channel;
the cover plate covers the outer side of the resonance space of the base, and wave absorbing elements for inhibiting the generation of convex waves of feedback signals are arranged in each feedback channel respectively.
Furthermore, the base is provided with symmetrical resonant spaces at two sides of the antenna port, and feedback channels communicated with the antenna port and two side output/input sides are respectively arranged in the resonant spaces at two adjacent sides.
Furthermore, the number of the grooves is two, and the grooves are respectively communicated with the two feedback channels correspondingly.
Furthermore, the groove is long and is provided with a plurality of frequency regulators in a penetrating mode at intervals in parallel.
Further, 3 frequency regulators penetrate through each groove.
Furthermore, a plurality of through holes corresponding to the resonance space positions are further formed in the cover plate, and the frequency regulator penetrates through the through holes.
Further, the frequency adjuster is a tuning screw.
Furthermore, the wave absorbing elements arranged in the feedback channels of the base are sheet wave absorbing elements made of carbon materials.
The utility model has the advantages as follows:
the utility model provides an adjustable cavity filter of sudden wave suppression degree of feedback, be equipped with the feedback channel in the base and have the wave-absorbing component, supply the low pass signal to feed back in order to solve the scattered wave condition of low pass signal, cover the apron outside the resonance space of base again, reach and utilize the wave-absorbing component in the feedback channel, carry out the purpose of filtering processing to the signal of feeding back to solve the problem that produces the protruding ripples interference in the feedback channel, can promote the signal reception of installing in cavity filter and the quality of the signal received; two feedback channels in the base are respectively installed with a wave-absorbing component made of carbon material, which can effectively filter the feedback signal, and a frequency adjuster is added on the feedback channel to further increase the surge suppression degree.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic perspective view of a hollow cavity filter according to the present invention;
fig. 2 is a schematic view of a three-dimensional exploded structure of the hollow cavity filter of the present invention;
fig. 3 is a top view of the base of the hollow cavity filter of the present invention;
FIG. 4 is a top view of a conventional cavity filter;
FIG. 5 is a diagram of a filtered signal of a conventional cavity filter;
reference numerals of the above figures:
1. a base; 10. a resonance space; 12. an output/input side; 11. an antenna port; 13. a feedback channel; 2. a cover plate; 20. a through hole; 21. a frequency adjuster; 211. a tuning screw; 212. a tuning screw; 213. a tuning screw; 22. a groove; 3. a wave absorbing element; A. a cavity filter; a0, resonance space; a1, base; a2, antenna port; a3, signal I/O terminal; a4, feedback channel; B. and (4) convex waves.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Please refer to fig. 1, fig. 2, fig. 3, and fig. 4, which illustrate a cavity filter capable of adjusting feedback surge suppression, and the cavity filter includes a base 1, a cover plate 2, and a wave-absorbing element 3, wherein a resonance space 10 for signal transmission is provided inside the base 1, an antenna port 11 for receiving and transmitting signals is provided in the resonance space 10, and output/input sides 12 for signal transmission are respectively provided at two sides of the resonance space 10, the cover plate 2 covers an outer side of the resonance space 10 of the base 1, feedback channels 13 for signal feedback are respectively provided between the antenna port 11 and the output/input sides 12 at two sides of the resonance space 10 of the base 1, and the wave-absorbing element 3 for suppressing the surge generation of the feedback signals is provided in each feedback channel 13;
at least one groove 22 corresponding to the position of the feedback channel is formed in the cover plate 2, and at least one frequency regulator 21 extending to the feedback channel 13 and being capable of being adjusted in the feedback channel 13 penetrates through all the grooves 22. The frequency adjuster 21 may be a tuning screw 213. Preferably, the cover plate is further provided with a plurality of through holes 20 corresponding to the positions of the resonance spaces, and the frequency regulator 21 is arranged in the through holes 20 in a penetrating manner.
By means of the above structure, the signal received (or transmitted) by the antenna port 11 of the base 1 is transmitted in the resonance space 10, the frequency component in the preset frequency range is captured, when passing through the resonance space 10, the tuning screws 211, 212 penetrating through the through hole 20 of the cover plate 2 are shifted in the resonance space 10, so as to adjust the frequency and bandwidth in the resonance space 10, and can be adjusted to the required frequency interval rapidly, then the signal is transmitted to the input/output side 12 at both sides for receiving (or transmitting) the preset frequency component, while the frequency components in other ranges are attenuated to a low level, but in the attenuated frequency components, the available signal is fed back again to adjust the component response of the compensation stop band frequency, and the fed back available frequency component enters the feedback channel 13 of the base 1 and passes through the wave absorbing element 3 in the feedback channel 13, and the frequency regulator 21 (corresponding to the tuning screw 213 shown in fig. 1 and fig. 2) inserted into the upper groove 22 is used to filter the feedback usable frequency component to filter the convex wave generated in the feedback frequency component, so as to form a constant feedback frequency component, and improve the signal receiving machine equipped with the cavity filter, the quality of the received signal (such as wireless communication base station, satellite communication equipment or remote microwave transceiver antenna, etc.), thereby stabilizing the influence and interference of other signals on signal transmission.
Since the frequency adjuster 21 (corresponding to the tuning screw 213 shown in fig. 1 and fig. 2) inserted into the feedback channel 13 is disposed in the cavity 22 corresponding to the feedback channel 13, the tuning screw 213 is moved to generate capacitance effects with different strengths, so as to further adjust the overall performance of the cavity filter.
Specifically, the above components are assembled to cover the cover 2 outside the resonance space 10 of the base 1, so that the frequency adjusters 21 on the cover 2 can be adjusted and moved in the resonance space 10. The base 1 may have symmetrical resonant spaces 10 on two sides of the antenna port 11, and the resonant spaces 10 on two adjacent sides are respectively provided with feedback channels 13 communicating the antenna port 11 and two output/input sides. Two feedback channels 13 adjacent to the resonance space 10 of the base 1 are used for the wave-absorbing element 3 to be inserted and positioned, and the base 1, the cover plate 2 and the wave-absorbing element 3 are used to form the cavity filter of the present invention. The wave absorbing elements arranged in the feedback channels of the base are sheet wave absorbing elements made of carbon materials.
The number of the grooves 22 may be one or two, and the grooves are respectively in corresponding communication with one or two of the feedback channels 13.
In a preferred embodiment, the groove 22 may be elongated and may be formed through the frequency adjustor 21 at a parallel interval. A plurality of frequency adjusters 21 can be respectively adjusted and shifted in the feedback channels 13 to adjust the frequency and bandwidth inside the resonant space 10. Preferably, 3 frequency regulators are arranged in each groove 22 in a penetrating manner.
The utility model discloses the principle and the implementation mode of the utility model are explained by applying the concrete embodiment, and the explanation of the above embodiment is only used for helping to understand the technical scheme and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (8)
1. A cavity filter with adjustable snapback suppression, comprising:
the base is internally provided with a resonance space for signal transmission, an antenna port for receiving and transmitting signals is arranged in the resonance space, output/input sides for signal transmission are respectively arranged at two sides of the resonance space, and feedback channels for signal feedback are respectively arranged between the antenna port of the resonance space and the output/input sides at the two sides of the resonance space;
the cover plate is covered outside the resonance space of the base, and at least one groove corresponding to the position of the feedback channel is formed in the cover plate;
the wave absorbing element is arranged in the corresponding feedback channel and is used for inhibiting the generation of convex waves of the feedback signals;
at least one frequency regulator, which can movably penetrate through the groove and extend into the corresponding feedback channel;
the cover plate covers the outer side of the resonance space of the base, and wave absorbing elements for inhibiting the generation of convex waves of feedback signals are arranged in each feedback channel respectively.
2. The cavity filter of claim 1, wherein the base has symmetrical resonant spaces at two sides of the antenna port, and the resonant spaces at two adjacent sides are respectively provided with feedback channels connecting the antenna port and two output/input sides.
3. The cavity filter of claim 2, wherein the number of the grooves is two, and the grooves are respectively connected to two of the feedback channels.
4. The adjustable snapback cavity filter of claim 1, wherein the notch is elongated to receive a plurality of the frequency adjusters in a side-by-side spaced relationship.
5. The cavity filter of claim 4, wherein 3 frequency adjusters are disposed in each of said grooves.
6. The cavity filter of claim 1, wherein the cover plate further comprises a plurality of through holes corresponding to the resonant space, and the frequency adjuster is disposed in the through holes.
7. The adjustable snapback cavity filter of claim 1, wherein the frequency adjuster is a tuning screw.
8. The cavity filter of claim 1, wherein the wave absorbing element disposed in each feedback channel of the base is a carbon sheet wave absorbing element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921022044.9U CN210040484U (en) | 2019-07-03 | 2019-07-03 | Cavity filter capable of adjusting suppression degree of feedback surge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921022044.9U CN210040484U (en) | 2019-07-03 | 2019-07-03 | Cavity filter capable of adjusting suppression degree of feedback surge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210040484U true CN210040484U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921022044.9U Active CN210040484U (en) | 2019-07-03 | 2019-07-03 | Cavity filter capable of adjusting suppression degree of feedback surge |
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| Country | Link |
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| CN (1) | CN210040484U (en) |
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2019
- 2019-07-03 CN CN201921022044.9U patent/CN210040484U/en active Active
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