Antenna control device

Abstract

The utility model relates to an antenna control device, which comprises an antenna module, a charging module, a modulation-demodulation module and a control module, and is characterized in that the charging module, the antenna module and the control module are respectively connected with the modulation-demodulation module; the control module controls the antenna module to carry out antenna switching through the modulation and demodulation module under the condition that the control module detects the charging signal sent by the charging module, and the RSE harmonic stray problem is effectively reduced through antenna switching.

Description

Technical Field

[0001] The utility model relates to the technical field of antenna switching, in particular to an antenna control device. Background Art

[0002] With the rapid development of communications technology, smart terminals such as mobile phones and tablets support an increasing number of frequency bands. During the trial production phase of mobile phones, radiated spurious emission (RSE) testing is necessary. Because the GSM band's main frequency power is high when receiving and transmitting signals, there's a certain probability that the phone's power plug will accidentally contact the exposed metal surface when plugged in, resulting in RSE harmonic spurious emissions. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an antenna control device, which solves the RSE harmonic spurious problem.

[0004] In a first aspect, an embodiment of the present invention provides an antenna control device, which includes an antenna module, a charging module, a modulation and demodulation module, and a control module, wherein the charging module, the antenna module, and the control module are respectively connected to the modulation and demodulation module; when the control module detects the charging signal emitted by the charging module, the control module controls the antenna module through the modulation and demodulation module to perform antenna switching.

[0005] Optionally, the charging module includes a charging interface, and when the charging module detects that the charging interface is connected to an external power source, the charging module sends a charging signal to the modulation and demodulation module.

[0006] Optionally, the device further includes exposed metal, which is a protective shell of the charging interface. When the charging plug of the external power source contacts the exposed metal, the charging module sends a charging signal to the modulation and demodulation module.

[0007] Optionally, the antenna module includes a first antenna and a second antenna, the distance between the first antenna and the charging interface is less than a first preset threshold, and the distance between the second antenna and the charging interface is greater than a second preset threshold, wherein the first preset threshold is less than the second preset threshold.

[0008] Optionally, the antenna module further includes an antenna switching circuit, and the first antenna, the second antenna and the modulation and demodulation module are respectively connected to the antenna switching circuit, and the antenna switching circuit is used to perform antenna switching between the first antenna and the second antenna.

[0009] Optionally, when the control module detects the first frequency band of the first antenna and the charging signal, the control module sends an antenna switching instruction to the antenna switching circuit through the modulation and demodulation module. The antenna switching circuit controls the second antenna to start receiving / transmitting signals and controls the first antenna to stop receiving / transmitting signals in response to the antenna switching instruction.

[0010] Optionally, the device further includes a frequency band registration module, which is connected to the modulation and demodulation module and is used to register the antenna module in the GSM frequency band.

[0011] Optionally, the second preset threshold is a safety distance threshold at which the antenna in the antenna module is not affected by contact between the charging plug and the exposed metal when receiving / transmitting signals.

[0012] The utility model provides an antenna control device, which includes an antenna module, a charging module, a modulation and demodulation module, and a control module, wherein the charging module, the antenna module, and the control module are respectively connected to the modulation and demodulation module; when the control module detects a charging signal emitted by the charging module, the control module controls the antenna module through the modulation and demodulation module to perform antenna switching. The utility model effectively reduces the RSE harmonic spurious problem through antenna switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] Figure 1 A schematic structural diagram of an antenna control device provided in an embodiment of the present utility model;

[0016] Figure 2 A schematic structural diagram of an antenna control device provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0017] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0018] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] In order to solve the above technical problems, the present invention provides an antenna control device. The antenna control device provided by the present invention can be specifically described through one or more of the following embodiments.

[0020] The GSM frequency band is the frequency of the cellular wireless communication system designated by the International Telecommunication Union for GSM mobile phones.

[0021] RSE (Radiated Spurious Emission) testing is part of electromagnetic compatibility (EMC) testing and is used to evaluate the unwanted electromagnetic radiation generated by wireless communication devices or transmitting devices outside their operating frequency range. These unwanted radiations are called "spurious" because they are not within the expected operating frequency range of the device.

[0022] Specifically, during the trial production phase of mobile phones, RSE R&D and testing of the phone's antenna revealed that due to the high power of the GSM band, when a USB charging port was plugged in, the USB port could accidentally contact the exposed metal in the phone's midframe, which in turn affected the antenna and generated RSE harmonic spurious signals. The existing method involves adding an insulating coating to the exposed metal, but this method increases phone manufacturing costs, is complex and imperfect, and cannot completely cover all exposed metal areas in the USB port.

[0023] Figure 1 A schematic structural diagram of an antenna control device provided in an embodiment of the present utility model is shown. Figure 1 The device 100 includes an antenna module 101, a charging module 102, a modem module 103 and a control module 104, wherein the charging module 102, the antenna module 101 and the control module 104 are respectively connected to the modem module 103; when the control module 104 detects the charging signal emitted by the charging module 102, it controls the antenna module 101 to perform antenna switching through the modem module 103.

[0024] It is understandable that the antenna control device 100 can be configured on a target device, which can be an electronic device such as a mobile phone or a tablet, and can be applied to all electronic devices that need to test RSE harmonic spurious emissions in charging scenarios.

[0025] It can be understood that the antenna module 101 receives microwave signals in space and sends the microwave signals to the modem module 103. The antenna module 101 receives the original analog signal, which cannot be directly processed by the target device. The modem module 103 needs to convert the analog signal into a digital signal that can be processed by the target device.

[0026] It is understandable that the charging module 102 sends a charging signal to the modulation and demodulation module 103 , and the charging signal indicates whether the target device is currently being charged or whether the target device needs to be charged.

[0027] As you can understand, modem module 103 is an abbreviation for modulator and demodulator. It translates a computer's digital signal into an analog signal that can be transmitted along a regular telephone line. The analog signal can then be received by another modem module at the other end of the line and translated into a digital signal that can be processed by the computer. Modem module 103 is connected to antenna module 101, charging module 102, and control module 104, respectively. Modem module 103 has receiving, forwarding, and processing functions. Specifically, modem module 103 receives analog signals from antenna module 101, charging signals from charging module 102, and antenna switching instructions from control module 104.

[0028] It is understandable that the control module 104 is the computing and control core of the system and is the final execution chip system-on-chip for information processing and program running. The control module 104 receives the charging signal and frequency band information sent by the modem module 103, wherein the frequency band information is determined by the modem module 103 based on the analog signal. When the control module 104 detects the charging signal, that is, when it determines that the target device is charging or the target device is to be charged, it generates an antenna switching instruction and sends the antenna switching instruction to the modem module 103. The modem module 103 then forwards the antenna switching instruction to the antenna module 101, wherein the antenna switching instruction is used to instruct the antenna module 101 to switch from the first antenna that is currently performing the receiving / transmitting signal task to the second antenna, and the second antenna performs the receiving / transmitting signal task. Generally, the first antenna is the default priority antenna.

[0029] Optionally, the charging module 102 includes a charging interface. When the charging module 102 detects that the charging interface is connected to an external power source, the charging module 102 sends a charging signal to the modulation and demodulation module 103 .

[0030] It is understandable that the charging module 102 includes a charging interface, and the charging module 102 sends a charging signal to the modulation and demodulation module 103 when the charging interface is connected to an external power source.

[0031] Optionally, the device 100 also includes exposed metal, which is a protective shell of the charging interface. When the charging plug of the external power supply contacts the exposed metal, the charging module 102 sends a charging signal to the modem module 103. When the charging plug of the external power supply contacts the exposed metal, the control module 104 controls the antenna module 101 to perform antenna switching through the modem module 103.

[0032] As you can understand, the charging port is often surrounded by exposed metal. As the target device's protective case, the external power plug (USB) is likely to come into contact with the exposed metal during charging, potentially leading to RSE harmonic spurious issues. Charging module 102 can send a charging signal to modem module 103 when the charging plug comes into contact with the exposed metal, allowing control module 104 to respond to the charging signal and promptly control antenna module 101 to switch antennas.

[0033] Optionally, the antenna module 101 includes a first antenna 101a and a second antenna 101b, the distance between the first antenna 101a and the charging interface is less than a first preset threshold, and the distance between the second antenna 101b and the charging interface is greater than a second preset threshold, wherein the first preset threshold is less than the second preset threshold.

[0034] Understandable, such as Figure 2 As shown, antenna module 101 includes a first antenna 101a and a second antenna 101b. The distance between first antenna 101a and the charging port is less than a first preset threshold, and first antenna 101a can be understood as the antenna close to the charging port. The distance between second antenna 101b and the charging port is greater than a second preset threshold, where the first preset threshold is less than the second preset threshold, and second antenna 101b can be understood as the antenna far from the charging port. It is understood that antenna module 101 includes at least two antennas, and the distance between different antennas and the charging port is not limited. The preset threshold can be set based on test results.

[0035] Optionally, the second preset threshold is a safety distance threshold at which the antenna in the antenna module 101 is not affected by the contact between the charging plug and the exposed metal when receiving / transmitting signals.

[0036] As can be understood, the second preset threshold is a safe distance threshold. First antenna 101a is relatively close to the charging port, making it susceptible to accidental contact with exposed metal on the USB port when receiving / transmitting signals, which can lead to RSE harmonic spurious issues. Therefore, it is necessary to determine a safe distance threshold that is immune to accidental contact. When the target device is charging, other antennas outside the safe distance threshold, such as second antenna 101b, can be promptly switched to receive / transmit signals. It is understood that the number of antennas outside the safe distance threshold is not limited and can be set based on device requirements.

[0037] Optionally, the antenna module 101 further includes an antenna switching circuit 101c, and the first antenna 101a, the second antenna 101b and the modulation and demodulation module 103 are respectively connected to the antenna switching circuit 101c, and the antenna switching circuit 101c is used to perform antenna switching between the first antenna 101a and the second antenna 101b.

[0038] Understandable, such as Figure 2 As shown in the connection relationship, the antenna switching circuit 101c is used to receive antenna switching instructions from the control module 104 through the modulation and demodulation module 103 to control the switching of the device antenna. The analog signals received by the first antenna 101a and the second antenna 101b also need to be transmitted to the modulation and demodulation module 103 through the antenna switching circuit 101c.

[0039] Optionally, when the control module 104 detects the first frequency band of the first antenna 101a and the charging signal, it sends an antenna switching instruction to the antenna switching circuit 101c through the modulation and demodulation module 103. The antenna switching circuit 101c controls the second antenna 101b to start receiving / transmitting signals in response to the antenna switching instruction, and controls the first antenna 101a to stop receiving / transmitting signals.

[0040] It is understandable that after the control module 104 receives the first frequency band and charging information sent by the modem module 103, it determines whether the device is charging and whether the registered frequency band of the first frequency band is the GSM frequency band registered by the first antenna, that is, it determines whether the target device is charging and whether the first antenna performs the work of receiving / transmitting signals. When the target device is charging and the first antenna is working, the modem module 103 sends an antenna switching instruction to the antenna switching circuit 101c, instructing the antenna switching circuit 101c to stop the first antenna 101a from performing the work of receiving / transmitting signals, and the second antenna 101b performs the work of receiving / transmitting signals, that is, when charging is working, the second antenna must be switched to work.

[0041] It is understandable that after the modem module 103 receives the analog signal and the charging signal, it determines the frequency band of the current target device registration signal based on the analog signal, and obtains the first frequency band, and then sends the first frequency band to the control module 104, which performs charging and frequency band judgment.

[0042] Optionally, when detecting the first frequency band of the first antenna and the charging signal, the modulation and demodulation module 103 forwards the antenna switching instruction issued by the control module 104 to the antenna switching circuit 101c.

[0043] It is understandable that the modem module 103 can also determine whether the target device is charging and whether the first frequency band is the GSM frequency band where the first antenna is located, and feed back the judgment result to the control module 104. The control module 104 directly generates an antenna switching instruction based on the judgment result, that is, the modem module 103 performs charging and frequency band judgment.

[0044] Optionally, the control module 104 does not issue the antenna switching instruction when detecting the second frequency band of the second antenna and the charging signal. The second frequency band is the frequency band where the second antenna 101b is located.

[0045] It is understandable that when the control module 104 detects the second frequency band and the charging signal, that is, the target device is charging when the second antenna is working, in this case, the control module 104 does not need to generate an antenna switching instruction.

[0046] Optionally, the device further includes a frequency band registration module, which is connected to the modulation and demodulation module 103 and is used for registering the GSM frequency band of the antenna module 101 .

[0047] As will be appreciated, apparatus 100 also includes a frequency band registration module, which is configured to wait for GSM frequency band registration after the target device is initialized. First antenna 101a and second antenna 101b register with the frequency band registration module during operation. Subsequently, upon receiving the analog signal transmitted by the antenna, modem module 103 determines the frequency band of the antenna signal based on the registration information of each antenna in the frequency band registration module, generates frequency band information, and feeds it back to control module 104.

[0048] The utility model provides an antenna control device, which solves the problem of RSE harmonics of the GSM frequency caused by the USB port accidentally touching the exposed metal of the middle frame during RSE testing in a device charging scenario. Compared with the solution of adding an insulating coating to the exposed metal position, the utility model reduces the manufacturing cost of the equipment and the defects in the process, effectively avoids the risk of RSE harmonics during the certification test process, and saves manufacturing costs.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or gateway that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article or gateway. In the absence of further restrictions, the elements defined by the sentence "including a..." do not exclude the presence of other identical elements in the process, method, article or gateway that includes the elements.

[0050] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments described herein, but rather to be embodied in the broadest possible manner consistent with the principles and novel features disclosed herein.

Claims

1. An antenna control device, characterized in that: The device includes an antenna module, a charging module, a modulation and demodulation module, and a control module, wherein the charging module, the antenna module, and the control module are respectively connected to the modulation and demodulation module; when the control module detects the charging signal emitted by the charging module, the control module controls the antenna module through the modulation and demodulation module to perform antenna switching.

2. The device according to claim 1, characterized in that The charging module includes a charging interface. When the charging module detects that the charging interface is connected to an external power source, the charging module sends a charging signal to the modulation and demodulation module.

3. The device according to claim 2, characterized in that The device further includes exposed metal, which is a protective shell of the charging interface. When the charging plug of the external power source contacts the exposed metal, the charging module sends a charging signal to the modulation and demodulation module.

4. The device according to claim 3, characterized in that The antenna module includes a first antenna and a second antenna, the distance between the first antenna and the charging interface is less than a first preset threshold, and the distance between the second antenna and the charging interface is greater than a second preset threshold, wherein the first preset threshold is less than the second preset threshold.

5. The device according to claim 4, characterized in that The antenna module further includes an antenna switching circuit. The first antenna, the second antenna and the modulation and demodulation module are respectively connected to the antenna switching circuit. The antenna switching circuit is used to perform antenna switching between the first antenna and the second antenna.

6. The device according to claim 5, characterized in that When the control module detects the first frequency band of the first antenna and the charging signal, it sends an antenna switching instruction to the antenna switching circuit through the modulation and demodulation module. In response to the antenna switching instruction, the antenna switching circuit controls the second antenna to start receiving / transmitting signals and controls the first antenna to stop receiving / transmitting signals.

7. The device according to claim 1, characterized in that The device further comprises a frequency band registration module, which is connected to the modulation and demodulation module and is used for performing GSM frequency band registration of the antenna module.

8. The device according to claim 4, characterized in that The second preset threshold is a safety distance threshold at which the antenna in the antenna module is not affected by the contact between the charging plug and the exposed metal when receiving / transmitting signals.

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