Antenna module and electronic equipment
By introducing switching circuits into the antenna module of electronic devices and switching the form of radiation branches, the problem of difficulty in covering a wide bandwidth in fixed-form antennas is solved, and the effect of multi-band coverage and improving radiation performance is achieved.
Patent Information
- Application Number
- CN202311617510.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-29
- Publication Date
- 2025-05-30
AI Technical Summary
The frame antennas in existing electronic devices are usually fixed in form, difficult to cover a wide bandwidth, and the working frequency band is relatively single.
By introducing a switching circuit into the antenna module, the radiating branches can be switched so that their current distribution can be in multiple modes, thereby increasing the coverage frequency band.
Multi-band coverage of antenna modules is realized, circuit configuration is simplified, circuit loss is reduced, and radiation performance is improved.
Smart Images
Figure CN120073285A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of terminals, and in particular, to an antenna module and an electronic device. Background Art
[0002] Currently, the frame antennas configured in electronic devices are usually in a fixed form. For example, the frame antennas are usually fixed IFA antennas or T antennas, with a single form. Moreover, it is difficult for the fixed IFA antennas or T antennas to cover a relatively wide bandwidth, and the operating frequency band is relatively single. Summary of the Invention
[0003] The present disclosure provides an antenna module and an electronic device to solve the deficiencies in the related art.
[0004] According to a first aspect of an embodiment of the present disclosure, an antenna module is provided, including:
[0005] A radiation branch, the radiation branch is provided with a grounding end, an upper frame point, and a free end disposed opposite to the grounding end, and the grounding end is grounded;
[0006] A feeding end, the feeding end is electrically connected to the upper frame point;
[0007] A switching circuit, one end of the switching circuit is connected to the free end, and the other end is conducted to the ground. When the switching circuit is in a conducting state, the free end is grounded, and the current distribution of the radiation branch is a first current mode. When the switching circuit is in a disconnected state, the current distribution of the radiation branch is a second current mode.
[0008] Optionally, when the switching circuit is in a disconnected state, the current distribution of the radiation branch is a 1 / 4 wavelength mode.
[0009] Optionally, the radiation branch is used to radiate a working signal in a low frequency band.
[0010] Optionally, the free end is directly grounded through the conducting switching circuit.
[0011] Optionally, the second current mode includes a 1 / 2 wavelength mode of the branch between the upper frame point and the grounding end, and a 1 / 2 wavelength mode of the branch between the upper frame point and the free end.
[0012] Optionally, a parasitic branch is further included, the parasitic branch includes a first end and a second end, the second end is grounded, and the first end cooperates with the free end to form a slit;
[0013] One end of the switching circuit is connected to the free end, and the other end is connected to a preset position between the first end and the second end.
[0014] Optionally, the second current mode includes a 1 / 2 wavelength mode of the stub between the upper frame point and the ground end, and a 1 / 2 wavelength mode of the stub between the upper frame point and the second end.
[0015] Optionally, when the switching circuit is in the on state, the radiating stub is used to radiate operating signals in the medium and high frequency bands.
[0016] Optionally, it further includes a SAR sensor, the SAR sensor is connected to the ground end, and the SAR sensor is also electrically connected to the switching circuit;
[0017] When the capacitance value detected by the SAR sensor is less than or equal to a preset threshold, the switching circuit switches to the on state.
[0018] According to a second aspect of the embodiments of the present disclosure, an electronic device is provided, including the antenna module described in any one of the above embodiments.
[0019] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:
[0020] As can be seen from the above embodiments, the present disclosure can switch the form of the radiating stub by turning on and off the switching circuit, so that the current distribution of the radiating stub can be in multiple current modes, which is beneficial to increasing the covered frequency band of the radiating stub.
[0021] It should be understood that the above general description and subsequent detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.
[0023] Figure 1 is a schematic diagram of a state of an antenna module shown according to an exemplary embodiment.
[0024] Figure 2 is Figure 1 another state schematic diagram of the antenna module in
[0025] Figure 3 is Figure 1 the total efficiency curve of the antenna module in two states in
[0026] Figure 4 is a schematic diagram of a state of another antenna module shown according to an exemplary embodiment.
[0027] Figure 5 is Figure 4 another state schematic diagram of the antenna module in Detailed implementation manners
[0028] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.
[0029] The terms used in the present disclosure are for the purpose of describing particular embodiments only and are not intended to limit the present disclosure. The singular forms "a", "the", and "said" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
[0030] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".
[0031] Figure 1 is a schematic diagram of a state of an antenna module shown according to an exemplary embodiment, Figure 2 is Figure 1 another schematic diagram of the state of the antenna module in. As Figure 1 and Figure 2 shown, the antenna module includes a radiation branch 1, a feeding end 2, and a switching circuit 3. The radiation branch 1 is provided with a grounding end 11, an upper frame point 12, and a free end 13. The free end 13 and the grounding end 11 are oppositely arranged and serve as the two ends of the radiation branch 1. The upper frame point 12 is located between the grounding end 11 and the free end 13. The feeding end 2 is electrically connected to the upper frame point 12, and a matching circuit can be arranged between the feeding end 2 and the upper frame point 12 as required. One end of the switching circuit 3 is connected to the free end 13, and the other end is conducted to the ground. And when the switching circuit 3 is in the Figure 1 disconnected state shown, the current distribution of the radiation branch 1 is the second current mode. When the switching circuit 3 is in the Figure 2When in the conduction state as shown, the free end 13 can be grounded through the switch circuit 3, and the current distribution of the radiation stub 1 is the first current mode. Based on this, by turning the switch circuit 3 on and off, the form of the radiation stub 1 can be switched so that it can be in multiple current modes, which is beneficial to increasing the covered frequency band of the radiation stub.
[0032] For example, still taking Figure 1 and Figure 2 as shown, in some embodiments, the free end 13 can be directly grounded through the turned-on switch circuit 3. Therefore, regardless of whether the switch circuit 3 is in the conduction state or the off state, the current is always distributed on the stub between the ground end 11 and the free end 13, and the difference lies in the different current distributions.
[0033] For example, in some cases, as Figure 1 shown, when the switch circuit 3 is in the off state, the radiation stub 1 is a conventional IFA antenna, and the current distribution on the radiation stub 1 is the 1 / 4 wavelength mode. Since the current of the 1 / 4 wavelength mode is distributed on the entire arm of the radiation stub 1 and the radiation arm is relatively long, at this time, the radiation stub 1 can be used to radiate the working signals in the low frequency band, such as the B5 frequency band signal, the B8 frequency band signal, and the B28 frequency band signal, etc. In other cases, as Figure 2 shown, when the switch circuit 3 is in the conduction state, the free end 13 can be directly grounded through the switch circuit 3. At this time, both the ground end 11 and the free end 13 of the radiation stub 1 are grounded, and the upper frame point 12 is located between the ground end 11 and the free end 13. Therefore, the exciting current will be shunted in the opposite direction and form the 1 / 2 wavelength mode of the stub between the upper frame point 12 and the ground end 11 and the 1 / 2 wavelength mode of the stub between the upper frame point 12 and the free end 13 under the action of the corresponding impedance. Since the radiation arm of the stub where the current mode is located is shortened, the wavelength of the resonance generated by the exciting current at this time is shorter than that in the 1 / 4 wavelength mode, and the working frequency band radiated by the radiation stub 1 can be greater than the working frequency band of the radiation stub 1 when the switch circuit 3 is in the off state. For example, the radiation stub 1 can be used to radiate the working signals in the medium and high frequency bands.
[0034] Specifically, refer to Figure 3 shown, Figure 3Among them, curve S1 is the total efficiency curve of the antenna module when the switching circuit 3 is in the off state. Curve S2 is the total efficiency curve of the antenna module when the switching circuit 3 is in the on state. Comparing curve S1 and curve S2, when the switching circuit 3 is off, the efficiency of the low-frequency band is relatively high. At point Mark1, the efficiency reaches -9 dB, and the radiation performance is good. When the switching circuit 3 is on, in the double 1 / 2 wavelength mode, the efficiency of the low-frequency band is very low and resonance cannot be generated. On the contrary, in the medium and high-frequency bands, the antenna efficiency increases, and the performance of the medium and high-frequency bands is greatly improved. Moreover, a relatively high efficiency is maintained in the frequency band of 2 GHz - 3 GHz. See points Mark2, Mark3, and Mark4 for details, and the efficiency can reach above -5 dB. A relatively wide frequency band coverage of radiation stub 1 can be achieved. Compared with the traditional scheme of switching frequency bands through a tuning switch, the wide-band coverage in the present disclosure simplifies the circuit configuration of the antenna, reduces circuit losses, and is beneficial to improving the radiation performance of the antenna module.
[0035] For another example, as Figure 4 and Figure 5 shown, the antenna module further includes a parasitic stub 4. The parasitic stub 4 includes a first end 41 and a second end 42. The second end 42 is grounded. The first end 41 cooperates with the free end 13 to form a slit. One end of the switching circuit 3 is connected to the free end 13, and the other end is connected to a preset position 43 between the first end 41 and the second end 42. At this time, as Figure 4 shown, when the switching circuit 3 is in the off state, the radiation stub 1 exhibits the form of a conventional IFA antenna. The current distribution on the radiation stub 1 is in the 1 / 4 wavelength mode. Since the current distribution in the 1 / 4 wavelength mode is on the entire arm of the radiation stub 1 and the radiation arm is relatively long, the radiation stub 1 can be used to radiate the operating signal in the low-frequency band at this time. For example, it can be used to radiate signals in bands B5, B8, and B28. As Figure 5 shown, when the switching circuit 3 is on, the free end 13 can be grounded through the switching circuit 3 and the stub between the preset position 43 and the second end 42. At this time, the second current mode includes the 1 / 2 wavelength mode of the stub between the upper frame point 12 and the ground end 11 and the 1 / 2 wavelength mode of the stub between the upper frame point 12 and the second end 42. Similarly, since the radiation arm of the current mode is shortened, the wavelength of the resonance generated by the exciting current is shorter than that in the 1 / 4 wavelength mode, and the operating frequency band radiated by the radiation stub 1 can be greater than the operating frequency band of the radiation stub 1 when the switching circuit 3 is in the off state. For example, the radiation stub 1 can be used to radiate the operating signal in the medium and high-frequency bands.
[0036] In each of the above embodiments, the antenna module may further include an SAR sensor 5. The SAR sensor 5 is connected to the ground terminal 11, and the SAR sensor 5 is also connected to the switch circuit 3. When the capacitance value detected by the SAR sensor 5 is less than or equal to a preset threshold, it can be considered that the user is contacting or approaching the switch circuit 3. Therefore, the SAR sensor 5 can feedback the detection result to the main control terminal of the electronic device configured with the antenna module, and the main control terminal actively controls the switch circuit 3 to switch to the closed state. Since the radiation stub 1 is in the 1 / 2 wavelength mode when the switch circuit 3 is in the closed state, compared with the 1 / 4 wavelength mode, the current distribution is more dispersed, so the radiation can be reduced to a certain extent.
[0037] Based on the technical solution of the present disclosure, an electronic device is further provided. The electronic device may include the antenna module described in any one of the above embodiments. Wherein, the electronic device may further include a processor, and the processor is electrically connected to the switch circuit 3. The processor can switch the on / off of the switch circuit 3 according to the current communication requirements, so as to switch the form of the radiation stub 1.
[0038] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the disclosure herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common general knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.
[0039] It should be understood that the present disclosure is not limited to the exact structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.
Claims
1. An antenna module, characterized in that, comprising: Radiating branches, the radiating branches are provided with a grounding end, an upper frame point and a free end disposed opposite to the grounding end, and the grounding end is grounded; A feeding end, the feeding end is electrically connected to the upper frame point; A switching circuit, one end of the switching circuit is connected to the free end, and the other end is conducted to the ground. When the switching circuit is in the conducting state, the free end is grounded, and the current distribution of the radiating branches is the first current mode. When the switching circuit is in the off state, the current distribution of the radiating branches is the second current mode.
2. The antenna module according to claim 1, characterized in that, When the switching circuit is in the off state, the current distribution of the radiating branches is the 1 / 4 wavelength mode.
3. The antenna module according to claim 2, characterized in that, The radiating branches are used to radiate operating signals in the low frequency band.
4. The antenna module according to claim 1, characterized in that, The free end is directly grounded through the conducting switching circuit.
5. The antenna module according to claim 4, characterized in that, The second current mode includes the 1 / 2 wavelength mode of the branch between the upper frame point and the grounding end, and the 1 / 2 wavelength mode of the branch between the upper frame point and the free end.
6. The antenna module according to claim 1, characterized in that, It further includes parasitic branches, the parasitic branches include a first end and a second end, the second end is grounded, and the first end cooperates with the free end to form a slit; One end of the switching circuit is connected to the free end, and the other end is connected to a preset position between the first end and the second end.
7. The antenna module according to claim 6, characterized in that, The second current mode includes the 1 / 2 wavelength mode of the branch between the upper frame point and the grounding end, and the 1 / 2 wavelength mode of the branch between the upper frame point and the second end.
8. The antenna module according to claim 6 or 7, characterized in that, When the switching circuit is in the conducting state, the radiating branches are used to radiate operating signals in the medium and high frequency bands.
9. The antenna module according to claim 6 or 7, characterized in that, It further includes a SAR sensor, the SAR sensor is connected to the grounding end, and the SAR sensor is also electrically connected to the switching circuit; When the capacitance value detected by the SAR sensor is less than or equal to a preset threshold, the switching circuit switches to the conducting state.
10. An electronic device, characterized in that, comprising the antenna module according to any one of claims 1-9.