CN116073123A - Antenna module and electronic equipment - Google Patents

Abstract

The application discloses an antenna module and electronic equipment belongs to communication technology field. The application provides an antenna module, include: the device comprises a radiator, a floor, a grounding piece, a first signal processing circuit and a second signal processing circuit; the first end of the radiator is electrically connected with the floor through the grounding piece, the second end of the radiator is electrically connected with the first signal processing circuit, and the first part of the radiator is electrically connected with the second signal processing circuit, wherein the first part is positioned between the first end of the radiator and the second end of the radiator; under the action of the first signal processing circuit, the radiator resonates in a first frequency band, under the action of the second signal processing circuit, the radiator resonates in a second frequency band, and the difference between the first frequency band and the second frequency band is smaller than or equal to a preset frequency.

Description

Antenna module and electronic equipment

Technical Field

The application belongs to the technical field of communication, and particularly relates to an antenna module and electronic equipment.

Background

Along with the continuous development and progress of communication technology, the communication frequency band that mobile terminal equipment needs to support is increased gradually, and simultaneously, the mobile terminal equipment is more and more powerful, and the addition of these functional components makes the construction space that leaves for the antenna design less and less. In order to reduce the space occupied by antennas of a plurality of communication frequency bands in a mobile terminal, the antennas in mobile terminal equipment (especially mobile phones) support a plurality of working frequency bands simultaneously.

However, the same antenna of the current mobile terminal device generally integrates two operating frequency bands with wider frequency band interval, so as to reduce mutual interference between the integrated frequency bands of the same antenna, and if the two operating frequency bands with smaller frequency band interval are integrated on the same antenna, larger interference exists between the two operating frequency bands of the antenna, thereby reducing the communication performance of the mobile terminal device.

Disclosure of Invention

An object of the embodiment of the application is to provide an antenna module and electronic equipment, which can integrate the working frequency bands with smaller frequency band intervals on the same antenna, and enable the two working frequency bands with smaller intervals to work normally, so that the communication performance of the mobile terminal equipment is improved.

In a first aspect, an embodiment of the present application provides an antenna module, including: the device comprises a radiator, a floor, a grounding piece, a first signal processing circuit and a second signal processing circuit;

the first end of the radiator is electrically connected with the floor through the grounding piece, the second end of the radiator is electrically connected with the first signal processing circuit, and the first part of the radiator is electrically connected with the second signal processing circuit, wherein the first part is positioned between the first end of the radiator and the second end of the radiator;

under the action of the first signal processing circuit, the radiator resonates in a first frequency band, under the action of the second signal processing circuit, the radiator resonates in a second frequency band, and the difference between the first frequency band and the second frequency band is smaller than or equal to a preset frequency.

In a second aspect, an embodiment of the present application provides an electronic device, including an antenna module as described in the first aspect.

In this embodiment of the application, an antenna module includes: the device comprises a radiator, a floor, a grounding piece, a first signal processing circuit and a second signal processing circuit; the first end of the radiator is electrically connected with the floor through the grounding piece, the second end of the radiator is electrically connected with the first signal processing circuit, and the first part of the radiator is electrically connected with the second signal processing circuit, wherein the first part is positioned between the first end of the radiator and the second end of the radiator; under the action of the first signal processing circuit, the radiator resonates in a first frequency band, under the action of the second signal processing circuit, the radiator resonates in a second frequency band, and the difference between the first frequency band and the second frequency band is smaller than or equal to a preset frequency. Thus, the same radiator is provided with two feeding points which are respectively and electrically connected with the two signal processing circuits, the radiator and the corresponding signal processing circuits form a current loop, so that two excitation currents with similar frequencies obtained after being processed by the signal processing circuits excite radio frequency signals with similar frequencies on the same radiator, even if two frequency bands with similar frequencies share one radiator, and mutual interference between the two frequency bands with similar frequencies is smaller.

Drawings

Fig. 1 is a schematic structural diagram of an antenna module according to an embodiment of the present disclosure;

fig. 2 is a second schematic structural diagram of an antenna module according to an embodiment of the present disclosure;

FIG. 3 is a circuit diagram of a first filter circuit in an embodiment of the present application;

FIG. 4 is a circuit diagram of a second filter circuit in an embodiment of the present application;

fig. 5 is a circuit diagram of a first matching circuit in an embodiment of the present application;

fig. 6 is a circuit diagram of a second matching circuit in an embodiment of the present application;

fig. 7 is a schematic diagram of radiation efficiency of the antenna module shown in fig. 2;

fig. 8 is a third schematic structural diagram of an antenna module according to an embodiment of the present disclosure;

fig. 9 is a schematic diagram of radiation efficiency of the antenna module shown in fig. 8.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the related art, the antenna of the mobile terminal device has a more complete design scheme in the aspect of integrating a plurality of non-adjacent frequency bands, and the method for integrating the adjacent frequency bands mainly depends on the following three schemes:

1) The single mode coverage, in this case, can cover only the signal radiation function of one frequency band, and therefore, it limits the bandwidth of the antenna.

2) The antenna is arranged into a multi-branch structure, different branches in the multi-branch structure can be used for signal radiation of different frequency bands, however, the antenna of the multi-branch structure needs to occupy a large space, which is not consistent with the design premise that the environment for the antenna on the mobile terminal equipment is increasingly worsened and the size of the antenna is gradually reduced.

3) The antenna is switched between two different frequency bands through the antenna switch, however, the antenna switch can cause the cost increase of the antenna module, and the two switched frequency bands cannot work simultaneously.

The antenna module provided by the embodiment of the application adopts the radiator with a single branch, and the radiator is connected with the two signal processing circuits with similar frequencies, so that the two signal processing circuits with similar frequencies can share the radiator. Compared with the single-mode coverage in the related art, the antenna module in the embodiment of the application has at least two working modes so as to support the signal radiation of the first frequency band and the second frequency band, and the bandwidth of the antenna module is improved; compared with the antenna with the multi-branch structure in the related art, the radiator with the single branch in the embodiment of the application can reduce the occupied space, thereby being more beneficial to the layout on the mobile terminal equipment; compared with the antenna switch in the related art for switching the antenna frequency band, the antenna module in the embodiment of the application has a simpler structure and can support the simultaneous operation of the first frequency band and the second frequency band.

The antenna module and the electronic device provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings by means of specific embodiments and application scenarios thereof.

Referring to fig. 1, an antenna module provided in an embodiment of the present application includes: radiator 1, floor 2, ground 3, first signal processing circuit 4 and second signal processing circuit 5.

The first end of the radiator 1 is electrically connected with the floor 2 through the grounding member 3, the second end of the radiator 1 is electrically connected with the first signal processing circuit 4, and the first portion 11 of the radiator 1 is electrically connected with the second signal processing circuit 5, wherein the first portion 11 is located between the first end of the radiator 1 and the second end of the radiator 1.

Under the action of the first signal processing circuit 4, the radiator 1 resonates in a first frequency band, and under the action of the second signal processing circuit 5, the radiator 1 resonates in a second frequency band, and the difference between the first frequency band and the second frequency band is smaller than or equal to a preset frequency.

The second end of the radiator 1 is electrically connected to the first signal processing circuit 4, and the point where the first signal processing circuit 4 is electrically connected to the radiator 1 may be near the end of the antenna port.

Under the action of the first signal processing circuit 4, the radiator 1 resonates in the first frequency band may be: the first signal processing circuit 4 is configured to provide a current in a first frequency band, and the passing current of the first signal processing circuit 4 is the current in the first frequency band, that is, the first signal processing circuit 4 does not pass (e.g., filters) the current in the frequency band other than the first frequency band.

Under the action of the second signal processing circuit 5, the radiator 1 resonates in the second frequency band may be: the second signal processing circuit 5 is configured to provide a current in the second frequency band, and the passing current of the second signal processing circuit 5 is the current in the second frequency band, i.e. the second signal processing circuit 5 does not pass (e.g. filters) the current in the frequency band other than the second frequency band.

Thus, the first signal processing circuit 4 passes the current of the first frequency band, but not the current of the second frequency band; the second signal processing circuit 5 can reduce interference between the first frequency band and the second frequency band by passing the current of the second frequency band, but not the current of the first frequency band.

Alternatively, as shown in fig. 2, the first signal processing circuit 4 includes: a first feed 41 and a first filter circuit 42, and the second signal processing circuit 5 includes a second feed 51 and a second filter circuit 52;

the first filter circuit 42 is connected in series between the first feed source 41 and the second end of the radiator 1, and the first filter circuit 42 is used for passing the current of the first frequency band and filtering the current of the second frequency band;

the second filter circuit 52 is connected in series between the second feed source 51 and the first portion 11, and the second filter circuit 52 is configured to pass the current in the second frequency band and filter the current in the first frequency band.

In the present embodiment, a filter circuit is connected in series to a signal processing circuit, so that the filter circuit passes signals in the frequency band of the output of the feed sources connected in series, and signals in other frequency bands are filtered, thereby reducing interference between the first feed source 41 and the second feed source 51.

It should be noted that, in the embodiment of the present application, the filter circuits are connected in series in the signal processing circuit, so that only one lower point of one signal processing circuit can be provided, and the current path can be prevented from being changed due to the fact that the current is grounded from the grounding point of the filter circuit.

In the embodiment shown in fig. 1 to 8, the grounding member 3, the first signal processing circuit 4 and the second signal processing circuit 5 are respectively exemplified by grounding the floor board 2, for example: the floor 2 is a main ground of the electronic device where the antenna module is located, for example: is a large area metal plate or a printed circuit board (Printed Circuit Board, PCB) plate of an electronic device. However, in one possible embodiment, the ground member 3, the first signal processing circuit 4, and the second signal processing circuit 5 may be connected to different ground terminals, respectively, which is not particularly limited herein.

In operation, as shown in fig. 2, the current path corresponding to the first frequency band is a first current path I1, the first current path I1 is a current path from the third ground terminal 31 to the second terminal of the radiator 1, and the third ground terminal 31 is an electrical connection terminal between the ground member 3 and the floor 2. The current path corresponding to the second frequency band is a second current path I2, where the second current path I2 is a current path from the second ground terminal 511 to the second terminal of the radiator 1, and the second ground terminal 511 may be an electrical connection terminal between the second signal processing circuit 5 and the floor 2.

In the embodiment of the present application, the electrical length of the first current path I1 is referred to as a first electrical length, and the electrical length of the second current path I2 is referred to as a second electrical length. That is, the first current path I1 is a path along which the signal processed by the first signal processing circuit 4 propagates on the radiator 1, and the second current path I2 is a path along which the signal processed by the second signal processing circuit 5 propagates on the radiator 1.

Alternatively, the first electrical length is the sum of the electrical lengths of the grounding element 3 and the radiator 1, and the second electrical length may be equal to the electrical length from the first portion 11 of the radiator 1 to the second end of the radiator 1.

Since the source end of the second signal processing circuit 5 is electrically connected to the first part 11 of the radiator 1 and the first part 11 is located between the first end of the radiator 1 and the second end of the radiator, the first electrical length is typically larger than the second length. Under the condition that the first frequency band and the second frequency band are the N harmonic current frequency band, N is an integer larger than 1, and the second frequency band is larger than the first frequency band.

The difference between the first frequency band and the second frequency band is smaller than or equal to a preset frequency, and the first frequency band and the second frequency band can be adjacent frequency bands or frequency bands with similar frequencies. For example: the first frequency band is the B8 frequency band of long term evolution (Long Term Evolution, LTE) and the second frequency band is the L5 frequency band of the global positioning system (Global Positioning System, GPS).

Of course, the first frequency band and the second frequency band may also be: LTE b32+b3, or GSM900+gps L5, or GPS l1+lte B3, is not meant to be exhaustive.

In order to achieve a first frequency band close to said second frequency band, the first part 11 may be brought close to the first end of the radiator 1, so that the first electrical length and the second electrical length may be brought close, whereby the first signal processing circuit 4 and the second signal processing circuit 5 excite radiation signals with similar frequencies in current paths with similar electrical lengths.

Optionally, the first frequency band includes a first resonant frequency band and a second resonant frequency band, the first resonant frequency band is twice the second resonant frequency band, and the second frequency band is greater than the second resonant frequency band and less than the first resonant frequency band.

In this embodiment, the antenna module has the following 3 modes:

1) The first resonant frequency band may be a 1/2 wavelength Loop (Loop) antenna mode from the third ground terminal 31 to the first feed 41, i.e. the first electrical length is equal to 1/2 of the wavelength of said first resonant frequency band;

2) The second resonant frequency band may be a 1/4 wavelength Loop antenna mode from the third ground terminal 31 to the first feed 41, i.e. the first resonant frequency band may be a double frequency of the second resonant frequency band, i.e. the first electrical length is equal to 1/4 of the wavelength of the second resonant frequency band;

3) The second frequency band may be a 1/4 wavelength Inverted-F Antenna (IFA) mode of the second feed 51 to the second end of the radiator 1, i.e. the second electrical length is equal to 1/4 of the wavelength of said second frequency band.

In an alternative embodiment, the second frequency band may be close to the second resonant frequency band, that is, two fundamental frequencies of the antenna module are close, and the first resonant frequency band is greater than the first resonant frequency band and the second frequency band. For convenience of explanation, in this embodiment of the present application, the first resonant frequency band is LTE B3, the second resonant frequency band is LTE B8, and the second frequency band is GPS L5, where LTE B8 and GPS L5 are adjacent frequency bands, and the frequency size relationships of LTE B3, LTE B8, and GPS L5 satisfy: LTE B8 < GPS L5 < LTE B3.

It should be noted that, in the embodiment of the present application, the first electrical length is equal to 1/2 of the wavelength of the first resonant frequency band, and equal to 1/4 of the wavelength of the second resonant frequency band, the second electrical length is equal to 1/4 of the wavelength of the second frequency band, and so on, which may be approximately equal to, for example: when 1/2 of the wavelength of the first resonance frequency band is equal to 0.9 to 1.1 times the first electrical length, it can be considered that 1/2 of the wavelength of the first resonance frequency band is equal to the first electrical length.

In an alternative embodiment, the first region of the radiator 1 is free of ground points, the first region being the region between the first location 11 and the second end of the radiator 1.

In this way, there is no ground point between the first signal processing circuit 4 and the second signal processing circuit 5, and it is possible to ensure that the current of the feed source in each of the first signal processing circuit 4 and the second signal processing circuit 5 is only one lower point, and is not destroyed by the circuit connected in parallel to the ground halfway, so that the modal characteristics of 1/4 wavelength can be maintained.

Optionally, a ratio of the first electrical length to the second electrical length is equal to a ratio of the second frequency band to the second resonant frequency band.

In one embodiment, the ratio of the first electrical length to the second electrical length is approximately equal to the ratio of the frequencies of the second frequency band to the second resonant frequency band, where the second frequency band is adjacent to the second resonant frequency band, the first electrical length may be made similar to the second electrical length, for example: the second ground 511 is brought close to the third ground 31 and the first portion 11 is brought close to the first end of the radiator 1.

Alternatively, as shown in fig. 2, the first portion 11 is spaced from the ground 3 by less than 1/2 of the total length of the radiator 1.

In this embodiment, the second electrical length is slightly shorter than the first electrical length and greater than 1/2 of the first electrical length, so that the second frequency band is slightly higher than the second resonant frequency band and lower than the first resonant frequency band.

Alternatively, as shown in fig. 3, the first filter circuit 42 includes: a first capacitor C1, a second capacitor C2, a first inductor L1 and a second inductor L2;

the first end of the first capacitor C1 and the first end of the first inductor L1 are electrically connected to the radiator 1, the second end of the first capacitor C1 and the second end of the first inductor L1 are electrically connected to the first end of the second capacitor C2, the second end of the second capacitor C2 is electrically connected to the first end of the second inductor L2, and the second end of the second inductor L2 is electrically connected to the first feed source 41 (through the first matching circuit 43).

In this embodiment, the first inductor L1 and the first capacitor C1 form a band-stop filter, and then the second capacitor C2 and the second inductor L2 form a low-pass filter and a high-pass filter respectively, so as to finally achieve the filtering effect of blocking the GPS L5, passing the LTE B8 and the LTE B3, ensuring the frequency component in the working frequency range of the first feed source 41, and blocking the frequency component in the working frequency range of the second feed source 51, where the working frequency range of the first feed source 41 may be the first frequency band, and the working frequency range of the second feed source 51 may be the second frequency band.

Optionally, as shown in fig. 4, the second filter circuit 52 includes: a third capacitor C3, a fourth capacitor C4, a third inductance L3 and a fourth inductance L4;

the first end of the third capacitor C3, the first end of the fourth capacitor C4 and the first end of the fourth inductor L4 are electrically connected to the radiator 1, the second end of the third capacitor C3 is electrically connected to the first end of the third inductor L3, and the second end of the third inductor L3, the second end of the fourth capacitor C4 and the second end of the fourth inductor L4 are electrically connected to the second feed source 51.

In this embodiment, the third inductor L3 and the third capacitor C3 form a band-pass filter, and the fourth capacitor C4 and the fourth inductor L4 form a low-resistance filter and a high-resistance filter respectively, so as to finally achieve the filtering effect of passing through the GPS L5 and blocking the LTE B8 and B3, ensure the frequency components within the working frequency range passing through the second feed source 51, and block the frequency components within the working frequency range of the first feed source 41.

Note that, the values of the capacitances and inductances in the first filter circuit 42 and the second filter circuit 52 may be determined according to the first resonant frequency band, the second resonant frequency band, and the second frequency band, which are not particularly limited herein.

It should be noted that, in the embodiment of the present application, since the LTE B8 is adjacent to the GPS L5 frequency band, the bandpass or bandstop filter with a simple structure cannot obtain the ideal isolation effect, in the embodiment of the present application, the filtering functions of the first signal processing circuit 4 and the second signal processing circuit 5 are implemented by the first filtering circuit 42 with the double-pass one-resistance function and the second filtering circuit 52 with the double-resistance one-pass function, where the frequencies of the first filtering circuit 42 and the second filtering circuit 52 correspond to each other and the characteristics are opposite, so that the isolation between the adjacent frequency bands can be optimized.

In addition, the first filter circuit 42 and the second filter circuit 52 are connected in series in the corresponding signal processing circuits, rather than being connected in parallel in the corresponding signal processing circuits to filter other frequency components. This is arranged to avoid that the above-mentioned 3 modes of operation of the antenna module, and the current path, are destroyed when current goes from the filter circuit to ground. Specifically, it is assumed that a filter is connected in parallel between the radiator 1 and the floor 2, and at this time, current will pass through the filter to the ground, and at this time, the 1/4 wavelength Loop (Loop) antenna mode from the third ground terminal 31 to the first feed 41 will not be maintained, but only the 1/2 wavelength Loop (Loop) antenna mode from the third ground terminal 31 to the first feed 41 will be implemented, so that it is not possible to integrate two similar frequency bands on the same radiator. In addition, a filter is connected in parallel between the radiator 1 and the floor 2, and the length of a current path formed between the third ground terminal and the parallel filter is greatly shortened, so that the current path is greatly different from the first current path.

Referring to fig. 2, the first signal processing circuit 4 further includes: the first matching circuit 43, the second signal processing circuit 5 further includes a second matching circuit 53;

the first matching circuit 43 is connected in series between the first feed 41 and the first filter circuit 42;

the second matching circuit 53 is connected in series between the second feed 51 and the second filter circuit 52.

Wherein, the first matching circuit 43 is used for adjusting the impedance of the antenna to match with the first feed source 41; the second matching circuit 53 is used to adjust the impedance of the antenna to match the second feed 51.

In one embodiment, as shown in fig. 5, the first matching circuit 43 includes: a fifth capacitor C5 and a fifth inductance L5;

the first end of the fifth capacitor C5 is electrically connected to the first filter circuit 42, the second end of the fifth capacitor C5 is electrically connected to the first end of the fifth inductor L5, and the second end of the fifth inductor L5 is electrically connected to the first feed 41.

The fifth capacitor C5 may be a smaller capacitor, for example: a capacitance of 0.5 p.

In one embodiment, as shown in fig. 6, the second matching circuit 53 includes: a sixth capacitance C6 and a sixth inductance L6;

the first end of the sixth capacitor C6 and the first end of the sixth inductor L6 are electrically connected to the second filter circuit 52, the second end of the sixth capacitor C6 is electrically connected to the second feed 51, and the second end of the sixth inductor L6 is grounded.

The values of the capacitances and inductances in the first matching circuit 43 and the second matching circuit 53 may be determined according to the antenna impedance and the feed impedance, and are not particularly limited herein. Further, the first matching circuit 43 and the second matching circuit 53 as provided in fig. 5 and 6 are merely examples, and in practice, the impedance between the matching feed and the antenna of the matching circuit of other circuit structure in the related art may also be applied, and are not particularly limited herein.

By performing simulation measurement on the antenna module shown in fig. 2, a radiation efficiency diagram shown in fig. 7 is obtained, wherein a line a represents radiation efficiency of a first frequency band (i.e., a first resonant frequency band (LTE B3) and a second resonant frequency band (LTE B8)), a line B represents radiation efficiency of a second frequency band (GPS L5), and a line C represents antenna isolation.

As can be seen from fig. 7, in the antenna module provided in this embodiment of the present application, by designing 2 feeds on one radiator 1, the antenna module can integrate three working modes of LTE B3, LTE B8 and GPS L5, wherein the frequencies of LTE B8 and GPS L5 are close, so that close frequency band coexistence is realized on the same radiator, and the isolation is good, which is always less than-15.

Referring to fig. 8, the first feed source and the second feed source are the same feed source F1.

By sharing the same feed F1 for the first signal processing circuit 4 and the second signal processing circuit 5, the structure of the antenna module can be further simplified.

In this embodiment, the second frequency band is blocked based on the first filter circuit 42, and the first frequency band is passed; the second filter circuit 52 blocks the first frequency band and passes the second frequency band. And the two filtering frequency characteristics are opposite, and at the moment, the first feed source and the second feed source are combined into the same feed source, so that the feeding of the same feed source F1 to the first frequency band current and the second frequency band current is not influenced.

The difference between this embodiment and the antenna module shown in fig. 2 is that the antenna module shown in fig. 8 can only switch between the first frequency band and the second frequency band in a time-sharing manner, and the antenna module shown in fig. 2 can radiate the signal of the first frequency band and the signal of the second frequency band at the same time.

Alternatively, the second filter circuit 52 may be electrically connected to the same feed F1 via the transmission line 6, wherein the transmission line 6 does not radiate signals, and wherein the second electrical length may ignore a portion of the transmission line 6, i.e. the transmission line 6 has a small influence on the second electrical length, which may be ignored.

As shown in fig. 9, line a represents the radiation efficiency of the first resonant frequency band (LTE B3) and the second resonant frequency band (LTE B8) of the antenna module shown in fig. 8, line B represents the radiation efficiency of the first resonant frequency band (LTE B3) and the second resonant frequency band (LTE B8) of the antenna module shown in fig. 2, and line c represents the radiation efficiency of the second frequency band (GPS L5) of the antenna module shown in fig. 2.

As can be seen from fig. 9, when the first feed source and the second feed source share the same feed source, the antenna efficiency in the operating frequency band is not significantly changed, and three operating modes are still considered.

In this embodiment of the application, an antenna module includes: a radiator 1, a floor 2, a ground 3, a first signal processing circuit 4 and a second signal processing circuit 5; the first end of the radiator 1 is electrically connected with the floor 2 through the grounding piece 3, the second end of the radiator 1 is electrically connected with the first signal processing circuit 4, and the first part 11 of the radiator 1 is electrically connected with the second signal processing circuit 5, wherein the first part 11 is positioned between the first end of the radiator 1 and the second end of the radiator 1; under the action of the first signal processing circuit 4, the radiator 1 resonates in a first frequency band, and under the action of the second signal processing circuit 5, the radiator 1 resonates in a second frequency band, and the difference between the first frequency band and the second frequency band is smaller than or equal to a preset frequency. Thus, the same radiator 1 has two feeding points, which are electrically connected with two signal processing circuits, respectively, and the radiator 1 and the corresponding signal processing circuits form a current loop, so that the two signal processing circuits excite radio frequency signals with similar frequencies on the radiator 1 through the excitation current of the working frequency of the signal processing circuits, even if two frequency bands with similar frequencies share one radiator 1, and mutual interference between the two frequency bands with similar frequencies is small.

The embodiment of the application also provides electronic equipment, which is provided with the antenna module as shown in any one of fig. 1 to 9.

The electronic device may be a mobile terminal device such as a mobile phone, a tablet computer, a notebook computer, an electronic watch, and the like, which is not particularly limited herein.

In the electronic equipment of the embodiment of the application, the radiator based on the same single branch in the antenna module can integrate two similar frequency bands, so that the space size of the antenna for assembling the two similar frequency bands on the electronic equipment is greatly reduced, and the electronic equipment is favorable for developing towards the directions of being light and thin and supporting multiple frequency bands.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims (13)

1. An antenna module, comprising: the device comprises a radiator, a floor, a grounding piece, a first signal processing circuit and a second signal processing circuit;

the first end of the radiator is electrically connected with the floor through the grounding piece, the second end of the radiator is electrically connected with the first signal processing circuit, and the first part of the radiator is electrically connected with the second signal processing circuit, wherein the first part is positioned between the first end of the radiator and the second end of the radiator;

under the action of the first signal processing circuit, the radiator resonates in a first frequency band, under the action of the second signal processing circuit, the radiator resonates in a second frequency band, and the difference between the first frequency band and the second frequency band is smaller than or equal to a preset frequency.

2. The antenna module of claim 1, wherein the first signal processing circuit comprises: the first feed source and the first filter circuit, and the second signal processing circuit comprises a second feed source and a second filter circuit;

the first filter circuit is connected in series between the first feed source and the second end of the radiator, and is used for passing signals of the first frequency band and filtering signals of the second frequency band;

the second filter circuit is connected in series between the second feed source and the first part, and is used for passing through the signals of the second frequency band and filtering the signals of the first frequency band.

3. The antenna module of claim 1, wherein a first region of the radiator is free of ground points, the first region being a region between the first location and the second end of the radiator.

4. An antenna module according to claim 2 or 3, wherein the first frequency band comprises a first resonant frequency band and a second resonant frequency band, the first resonant frequency band being twice the second resonant frequency band, the second frequency band being larger than the second resonant frequency band and smaller than the first resonant frequency band.

5. The antenna module of claim 4, wherein a first electrical length is equal to 1/2 of a wavelength of the first resonant frequency band and equal to 1/4 of a wavelength of the second resonant frequency band, wherein the first electrical length is a sum of electrical lengths of the ground and the radiator;

the second electrical length is equal to 1/4 of the wavelength of the second frequency band, wherein the second electrical length is the electrical length from the first portion of the radiator to the second end of the radiator.

6. The antenna module of claim 5, wherein a ratio of the first electrical length to the second electrical length is equal to a ratio of the second frequency band to the second resonant frequency band.

7. The antenna module of claim 6, wherein the first portion is spaced from the ground by a distance less than 1/2 of the total length of the radiator.

8. An antenna module according to claim 2 or 3, wherein the first filter circuit comprises: the first capacitor, the second capacitor, the first inductor and the second inductor;

the first end of the first capacitor and the first end of the first inductor are electrically connected to the radiator, the second end of the first capacitor and the second end of the first inductor are electrically connected to the first end of the second capacitor, the second end of the second capacitor is electrically connected to the first end of the second inductor, and the second end of the second inductor is electrically connected to the first feed source.

9. An antenna module according to claim 2 or 3, wherein the second filter circuit comprises: a third capacitor, a fourth capacitor, a third inductor and a fourth inductor;

the first end of the third capacitor, the first end of the fourth capacitor and the first end of the fourth inductor are electrically connected to the radiator, the second end of the third capacitor is electrically connected to the first end of the third inductor, and the second end of the third inductor, the second end of the fourth capacitor and the second end of the fourth inductor are electrically connected to the second feed source.

10. The antenna module of claim 4, wherein the first resonant frequency band is a B3 frequency band, the second resonant frequency band is a B8 frequency band, and the second frequency band is a global positioning system GPS L5 frequency band.

11. An antenna module according to claim 2 or 3, wherein the first feed and the second feed are the same feed.

12. An antenna module according to claim 2 or 3, wherein the first signal processing circuit further comprises: the first matching circuit, the said second signal processing circuit also includes the second matching circuit;

the first matching circuit is connected in series between the first feed source and the first filter circuit;

the second matching circuit is connected in series between the second feed source and the second filter circuit.

13. An electronic device comprising an antenna module as claimed in any one of claims 1 to 12.

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