FM antenna multiplexing GSM PIFA antenna control circuit and device

Abstract

The utility model discloses a PIFA antenna control circuit and device for multiplexing an FM antenna and a GSM. The PIFA antenna control circuit for multiplexing the FM antenna and the GSM comprises a power supply module, a main control module, a feed point input module, a radio frequency amplification module, a radio frequency input module and a radio frequency output module. The feed point input module is electrically connected with the radio frequency input module, the radio frequency input module is electrically connected with the radio frequency amplification module, the power supply module is electrically connected with the radio frequency amplification module, the radio frequency amplification module is electrically connected with the radio frequency output module, and the main control module is electrically connected with the radio frequency amplification module. According to the utility model, the GSM antenna is multiplexed by the FM antenna, so that the transmission stability of wireless radio frequency signals is enhanced, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of communication, in particular to a PIFA antenna control circuit and a device for multiplexing an FM antenna with a GSM. Background Art

[0002] Wireless headphones have the wire in the middle replaced by radio waves. They are connected from the audio outlet to the transmitter, which then sends the radio waves to the receiver. The receiver is like a radio. There are three known types of wireless headphones: Bluetooth headphones, infrared headphones, and 2.4G headphones.

[0003] In the prior art, FM antennas are usually placed inside earphones or pulled out of a rod to make electronic devices too thin or waterproof for three-proof functions or to achieve a simple appearance. This arrangement makes the PCB board routing complicated and increases the difficulty of wiring. In addition, this arrangement is difficult to debug and the FM signal is unstable, which affects the user's experience. Therefore, it is an urgent problem for technicians in this field to invent a new and reliable FM antenna multiplexing GSM PIFA antenna control circuit and device. Utility Model Content

[0004] The purpose of this application is to provide a PIFA antenna control circuit and device for FM antenna reuse GSM. In this solution, FM signal reception is achieved by reusing the GSM antenna, and the antenna reception function is realized, so that wireless headphones can enjoy stereo music as a receiver, thereby improving the user experience.

[0005] In order to solve the above technical problems, the present application provides a PIFA antenna control circuit for FM antenna multiplexing GSM, including a power supply module, a main control module, a feed point input module, a radio frequency amplification module, a radio frequency input module and a radio frequency output module;

[0006] The feed point input module is electrically connected to the RF input module, the RF input module is electrically connected to the RF amplification module, the power supply module is electrically connected to the RF amplification module, the RF amplification module is electrically connected to the RF output module, and the main control module is electrically connected to the RF amplification module.

[0007] Preferably, the feed point input module includes a GSM filtering unit and a GSM antenna matching unit;

[0008] The GSM filter unit is electrically connected to the feed point input terminal, the GSM antenna matching unit is electrically connected to the GSM filter unit, and the GSM antenna matching unit is electrically connected to the radio frequency input module.

[0009] Preferably, the radio frequency input module comprises a first FM filter unit and a FM antenna matching unit;

[0010] The first FM filter unit is electrically connected to the feed point input module, the FM antenna matching unit is electrically connected to the first FM filter unit, and the radio frequency amplification module is electrically connected to the first FM filter unit.

[0011] Preferably, the RF output module includes a second FM filter unit electrically connected;

[0012] The second FM filter unit is electrically connected to the radio frequency amplification module.

[0013] Preferably, the GSM filter unit comprises a first inductor and a first capacitor;

[0014] The first end of the first inductor is electrically connected to the feed point input end and the first end of the first capacitor respectively, and the second end of the first inductor is electrically connected to the second end of the first capacitor and the GSM antenna matching unit respectively.

[0015] Preferably, the GSM antenna matching unit includes a second inductor, a third inductor and a second capacitor;

[0016] The first end of the second inductor is electrically connected to the first end of the second capacitor and the GSM filter unit respectively, the second end of the second inductor is grounded, the second end of the second capacitor is electrically connected to the first end of the third inductor and the RF input module respectively, and the second end of the third inductor is grounded.

[0017] Preferably, the first FM filter unit comprises a fourth inductor and a third capacitor;

[0018] The first end of the fourth inductor is electrically connected to the first end of the third capacitor, the feed point input module and the FM antenna matching unit respectively, the second end of the fourth inductor is grounded, and the second end of the third capacitor is grounded.

[0019] Preferably, the FM antenna matching unit includes a fifth inductor, a sixth inductor, a seventh inductor, a fourth capacitor and a fifth capacitor;

[0020] The first end of the fifth inductor is electrically connected to the first FM filter unit, the second end of the fifth inductor is electrically connected to the first end of the sixth inductor, the first end of the seventh inductor and the first end of the fourth capacitor respectively, the second end of the sixth inductor is grounded, the second end of the fourth capacitor is grounded, the second end of the seventh inductor is electrically connected to the first end of the fifth capacitor, and the second end of the fifth capacitor is electrically connected to the RF amplification module.

[0021] Preferably, the model of the radio frequency amplification module is set to AW5007STR.

[0022] In order to solve the above technical problems, the present application provides a FM antenna multiplexing GSM PIFA antenna control device, including the FM antenna multiplexing GSM PIFA antenna control circuit.

[0023] The utility model discloses a PIFA antenna control circuit and device for multiplexing FM antenna with GSM, which has the following beneficial effects. The utility model discloses a PIFA antenna control circuit for multiplexing FM antenna with GSM, which includes a power supply module, a main control module, a feed point input module, a radio frequency amplification module, a radio frequency input module and a radio frequency output module; the feed point input module is electrically connected to the radio frequency input module, the radio frequency input module is electrically connected to the radio frequency amplification module, the power supply module is electrically connected to the radio frequency amplification module, the radio frequency amplification module is electrically connected to the radio frequency output module, and the main control module is electrically connected to the radio frequency amplification module. The power supply module is used to provide a stable voltage, the feed point input module is used as an antenna input point, and the electromagnetic wave signal generated by the GSM antenna is efficiently converted into a GSM radio frequency signal; the radio frequency input module is used to receive the FM radio frequency signal through the PI FA antenna and as a location, the radio frequency amplification module is used to amplify the FM radio frequency signal with low noise, and the radio frequency output module is used to transmit the amplified FM radio frequency signal. Therefore, the utility model multiplexes the GSM antenna with the FM antenna to enhance the transmission stability of the wireless radio frequency signal and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0025] Figure 1 It is a principle block diagram of a FM antenna multiplexing GSM PI FA antenna control circuit of a preferred embodiment of the utility model;

[0026] Figure 2 This is a circuit schematic diagram of a feed point input module of a preferred embodiment of the utility model;

[0027] Figure 3 The present invention is a circuit diagram of a radio frequency amplification module, a radio frequency input module and a radio frequency output module according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0028] The core of this application is to provide a PI FA antenna control circuit and device for FM antenna reuse GSM. In this solution, FM signal reception is achieved by reusing the GSM antenna to realize the function of the radio antenna, so that the wireless headset can enjoy stereo music as a receiver, thereby improving the user experience.

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] See also Figure 1 , Figure 1 The principle block diagram of a FM antenna multiplexing GSM PIFA antenna control circuit provided in the present application includes a power supply module 1, a main control module 2, a feed point input module 3, a radio frequency amplification module 4, a radio frequency input module 5 and a radio frequency output module 6;

[0031] The feed point input module 3 is electrically connected to the RF input module 5, the RF input module 5 is electrically connected to the RF amplification module 4, the power supply module 1 is electrically connected to the RF amplification module 4, the RF amplification module 4 is electrically connected to the RF output module 6, and the main control module 2 is electrically connected to the RF amplification module 4.

[0032] Preferably, the feed point input module 3 includes a GSM filtering unit and a GSM antenna matching unit;

[0033] The GSM filter unit is electrically connected to the feed point input terminal, the GSM antenna matching unit is electrically connected to the GSM filter unit, and the GSM filter unit is electrically connected to the radio frequency input module 5 .

[0034] In the prior art, FM antennas are usually installed in earphones or pulled out of a rod to make electronic devices too thin or waterproof to achieve a simple appearance. This makes the PCB wiring complicated and increases the difficulty of wiring. In addition, this setting is difficult to debug and the FM signal is unstable, which affects the user's experience.

[0035] In response to the above shortcomings, the present application realizes the multiplexing of FM antenna with GSM antenna through the cooperation of power module 1, main control module 2, feed point input module 3, RF amplification module 4, RF input module 5 and RF output module 6, thereby enhancing the transmission stability of wireless RF signals.

[0036] Specifically, the main control module 2 is set as an MCU (Microcontroller Unit; MCU), also known as a single chip microcomputer (Single Chip Microcomputer) or a single chip microcomputer, which appropriately reduces the frequency and specifications of the central processing unit (CPU), and integrates memory (memory), counter (Timer), USB, A / D conversion, UART, PLC, DMA and other peripheral interfaces, and even LCD drive circuits on a single chip to form a chip-level computer. In this embodiment, the chip model of the main control module 2 is not specifically limited.

[0037] Specifically, in this embodiment, the power supply module 1 is used to provide a stable voltage, the feed point input module 3 is used as an antenna input point to efficiently convert the electromagnetic wave signal generated by the GSM antenna into an FM radio frequency signal; the radio frequency input module 5 is used to receive the FM radio frequency signal through the PIFA antenna and as a location, the radio frequency amplification module 4 is used to amplify the FM radio frequency signal with low noise, and the radio frequency output module 6 is used to transmit the amplified FM radio frequency signal.

[0038] It is worth noting that in this embodiment, the PIFA antenna takes the signal from the ground feeding point, and the FM signal path is equivalent to being connected to the ground, which has little impact on the performance of the GSM antenna and stable signal transmission. In addition, the power at the ground feeding point of the antenna is smaller than that at the signal feeding point, thereby effectively preventing high power from being coupled to the FM RF signal RF amplifier module 4 and causing saturation of the RF amplifier module 4.

[0039] Specifically, in this embodiment, the FM radio frequency signal is obtained from the ground feeding point, which can reduce the difficulty of antenna debugging in the antenna factory, and the influence of the antenna matching on the FM radio frequency signal is small after the antenna matching is updated.

[0040] In summary, the present application provides a FM antenna multiplexing GSM PI FA antenna control circuit, in this solution, including a power module 1, a main control module 2, a feed point input module 3, a radio frequency amplification module 4, a radio frequency input module 5 and a radio frequency output module 6; the feed point input module 3 is electrically connected to the radio frequency input module 5, the radio frequency input module 5 is electrically connected to the radio frequency amplification module 4, the power module 1 is electrically connected to the radio frequency amplification module 4, the radio frequency amplification module 4 is electrically connected to the radio frequency output module 6, and the main control module 2 is electrically connected to the radio frequency amplification module 4. Therefore, the present utility model strengthens the transmission stability of wireless radio frequency signals and improves user experience by multiplexing the GSM antenna with the FM antenna.

[0041] Based on the above embodiments:

[0042] Please refer to Figure 2 , Figure 2A circuit schematic diagram of a feed point input module provided in this application.

[0043] As a preferred embodiment, the feed point input module 3 includes a GSM filter unit 31 and a GSM antenna matching unit 32;

[0044] The GSM filter unit 31 is electrically connected to the feed point input terminal, the GSM antenna matching unit 32 is electrically connected to the GSM filter unit 31 , and the GSM antenna matching unit 32 is electrically connected to the radio frequency input module 5 .

[0045] As a preferred embodiment, the GSM filter unit 31 includes a first inductor L1 and a first capacitor C1;

[0046] The first end of the first inductor L1 is electrically connected to the feed point input end and the first end of the first capacitor C1 respectively, and the second end of the first inductor L1 is electrically connected to the second end of the first capacitor C1 and the GSM antenna matching unit 32 respectively.

[0047] Specifically, in this embodiment, the first inductor L1 and the first capacitor form an LC filter circuit, which is used to filter the GSM signal, suppress the FM signal, and improve the reliability of GSM signal transmission.

[0048] As a preferred embodiment, the GSM antenna matching unit 32 includes a second inductor L3, a third inductor L4 and a second capacitor C3;

[0049] The first end of the second inductor L3 is electrically connected to the first end of the second capacitor C3 and the GSM filter unit respectively, the second end of the second inductor L3 is grounded, the second end of the second capacitor C3 is electrically connected to the first end of the third inductor L4 and the RF input module 5 respectively, and the second end of the third inductor L4 is grounded.

[0050] Specifically, in this embodiment, the second inductor L3, the third inductor L4 and the second capacitor C3 form a π-type matching circuit, which is used to achieve impedance matching of the GSM antenna and improve the transmission efficiency of the GSM radio frequency signal.

[0051] Please refer to Figure 3 , Figure 3 A circuit schematic diagram of a radio frequency amplification module, a radio frequency input module and a radio frequency output module provided in this application.

[0052] As a preferred embodiment, the radio frequency input module 5 includes a first FM filter unit 51 and an FM antenna matching unit 52;

[0053] The first FM filter unit 51 is electrically connected to the feed point input module 3 , the FM antenna matching unit 52 is electrically connected to the first FM filter unit 51 , and the RF amplification module 4 is electrically connected to the first FM filter unit 51 .

[0054] As a preferred embodiment, the first FM filter unit includes a fourth inductor L9 and a third capacitor C9;

[0055] The first end of the fourth inductor L9 is electrically connected to the first end of the third capacitor C9, the feed point input module 3 and the FM antenna matching unit 52 respectively. The second end of the fourth inductor L9 is grounded. The second end of the third capacitor C9 is grounded.

[0056] Specifically, the first FM filter unit 51 is used to implement filtering processing of the FM radio frequency signal.

[0057] As a preferred embodiment, the RF output module 6 includes a second FM filter unit 53 electrically connected to;

[0058] The second FM filter unit 53 is electrically connected to the RF amplification module 4 .

[0059] As a preferred embodiment, the FM antenna matching unit 52 includes a fifth inductor L5, a sixth inductor L6, a seventh inductor L7, a fourth capacitor C3 and a fifth capacitor C4;

[0060] The first end of the fifth inductor L5 is electrically connected to the first FM filter unit 51, the second end of the fifth inductor L5 is electrically connected to the first end of the sixth inductor L6, the first end of the seventh inductor L7 and the first end of the fourth capacitor C3, respectively, the second end of the sixth inductor L6 is grounded, the second end of the fourth capacitor C3 is grounded, the second end of the seventh inductor L7 is electrically connected to the first end of the fifth capacitor C4, and the second end of the fifth capacitor C4 is electrically connected to the RF amplification module 4.

[0061] Specifically, in this embodiment, the FM antenna matching unit 52 is used to implement FM signal filtering, suppress GSM signals, and achieve impedance matching of FM signals.

[0062] As a preferred embodiment, the model of the radio frequency amplification module 4 is set to AW5007STR. It can be understood that AW5007A is a low noise amplifier, which does not require earphones and a telescopic antenna, and realizes FM radio frequency signal reception by multiplexing the GSM antenna.

[0063] The present application also provides a FM antenna multiplexing GSM PIFA antenna control device, including a FM antenna multiplexing GSM PIFA antenna control circuit.

[0064] For an introduction to a FM antenna multiplexing GSM PIFA antenna control circuit provided in the present application, please refer to the above-mentioned embodiment, and the present application will not go into details here.

[0065] It should be noted that, in this specification, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0066] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be 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 application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A PIFA antenna control circuit for FM antenna multiplexing GSM, characterized in that: It includes a power module, a main control module, a feed point input module, a radio frequency amplification module, a radio frequency input module and a radio frequency output module; The feed point input module is electrically connected to the RF input module, the RF input module is electrically connected to the RF amplification module, the power supply module is electrically connected to the RF amplification module, the RF amplification module is electrically connected to the RF output module, and the main control module is electrically connected to the RF amplification module.

2. The FM antenna multiplexing GSM PIFA antenna control circuit according to claim 1, characterized in that: The feed point input module includes a GSM filtering unit and a GSM antenna matching unit; The GSM filter unit is electrically connected to the feed point input terminal, the GSM antenna matching unit is electrically connected to the GSM filter unit, and the GSM antenna matching unit is electrically connected to the radio frequency input module.

3. The FM antenna multiplexing GSM PIFA antenna control circuit according to claim 1, characterized in that: The radio frequency input module includes a first FM filter unit and an FM antenna matching unit; The first FM filter unit is electrically connected to the feed point input module, the FM antenna matching unit is electrically connected to the first FM filter unit, and the radio frequency amplification module is electrically connected to the first FM filter unit.

4. The FM antenna multiplexing GSM PIFA antenna control circuit according to claim 1, characterized in that: The radio frequency output module includes a second FM filter unit electrically connected; The second FM filter unit is electrically connected to the radio frequency amplification module.

5. The FM antenna multiplexing GSM PIFA antenna control circuit according to claim 2, characterized in that: The GSM filter unit includes a first inductor and a first capacitor; The first end of the first inductor is electrically connected to the feed point input end and the first end of the first capacitor respectively, and the second end of the first inductor is electrically connected to the second end of the first capacitor and the GSM antenna matching unit respectively.

6. The FM antenna multiplexing GSM PIFA antenna control circuit according to claim 2, characterized in that: The GSM antenna matching unit includes a second inductor, a third inductor and a second capacitor; The first end of the second inductor is electrically connected to the first end of the second capacitor and the GSM filter unit respectively, the second end of the second inductor is grounded, the second end of the second capacitor is electrically connected to the first end of the third inductor and the RF input module respectively, and the second end of the third inductor is grounded.

7. The FM antenna multiplexing GSM PIFA antenna control circuit according to claim 3, characterized in that: The first FM filter unit includes a fourth inductor and a third capacitor; The first end of the fourth inductor is electrically connected to the first end of the third capacitor, the feed point input module and the FM antenna matching unit respectively, the second end of the fourth inductor is grounded, and the second end of the third capacitor is grounded.

8. The FM antenna multiplexing GSM PIFA antenna control circuit according to claim 3, characterized in that: The FM antenna matching unit includes a fifth inductor, a sixth inductor, a seventh inductor, a fourth capacitor and a fifth capacitor; The first end of the fifth inductor is electrically connected to the first FM filter unit, the second end of the fifth inductor is electrically connected to the first end of the sixth inductor, the first end of the seventh inductor and the first end of the fourth capacitor respectively, the second end of the sixth inductor is grounded, the second end of the fourth capacitor is grounded, the second end of the seventh inductor is electrically connected to the first end of the fifth capacitor, and the second end of the fifth capacitor is electrically connected to the RF amplification module.

9. The FM antenna multiplexing GSM PIFA antenna control circuit according to claim 1, characterized in that: The model of the radio frequency amplification module is set to AW5007STR.

10. A PIFA antenna control device for FM antenna multiplexing GSM, characterized in that: A PIFA antenna control circuit for multiplexing an FM antenna with GSM as claimed in any one of claims 1 to 9.

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