CN214480596U - Radio frequency assembly - Google Patents
Radio frequency assembly Download PDFInfo
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- CN214480596U CN214480596U CN202121647965.1U CN202121647965U CN214480596U CN 214480596 U CN214480596 U CN 214480596U CN 202121647965 U CN202121647965 U CN 202121647965U CN 214480596 U CN214480596 U CN 214480596U
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Abstract
The utility model discloses a radio frequency component, which comprises an antenna, an alternative analog switch A, a circulator and a frequency source module; the frequency source module generates three local oscillation signals through a crystal oscillator, namely receiving the local oscillation signals, transmitting a first local oscillation signal and transmitting a second local oscillation signal; the circulator is connected with a receiving channel and a transmitting channel; the transmitting channel comprises an intermediate frequency signal generator, an intermediate frequency signal filter amplifier, a two-local-oscillator mixer, a two-local-oscillator filter amplifier, a one-local-oscillator mixer, a one-local-oscillator filter amplifier, a coupler, a numerical control attenuator A, an alternative analog switch B, a power amplifier, an isolator, a duplexer A and a harmonic filter which are connected in sequence. The radio frequency assembly in the utility model can be independently assembled and debugged, and has the receiving and transmitting function and the frequency division full duplex working mode; the electromagnetic shielding device has good electromagnetic shielding performance and can ensure normal work in a complex electromagnetic environment.
Description
Technical Field
The utility model relates to a radio frequency technology field, concretely relates to radio frequency assembly.
Background
In the theory of electronics, current flows through a conductor, and a magnetic field is formed around the conductor; an alternating current passes through a conductor, around which an alternating electromagnetic field, called an electromagnetic wave, is formed. When the frequency of the electromagnetic waves is lower than 100kHz, the electromagnetic waves can be absorbed by the ground surface and cannot form effective transmission, but when the frequency of the electromagnetic waves is higher than 100kHz, the electromagnetic waves can be transmitted in the air and reflected by an ionosphere at the outer edge of the atmosphere to form long-distance transmission capability. At present, high frequency electromagnetic waves with long distance transmission capability are called radio frequency, and devices or parts with radio frequency function are defined as radio frequency components. However, the existing radio frequency components generally cannot be independently debugged, and meanwhile, some radio frequency components only have a transmitting channel or a receiving channel.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a radio frequency subassembly.
In order to achieve the above object, in one embodiment of the present invention, a radio frequency module is provided, which includes an antenna, an alternative analog switch a, a circulator, and a frequency source module;
the frequency source module generates three local oscillation signals through a crystal oscillator, namely receiving the local oscillation signals, transmitting a first local oscillation signal and transmitting a second local oscillation signal;
the circulator is connected with a receiving channel and a transmitting channel;
the transmitting channel comprises an intermediate frequency signal generator, an intermediate frequency signal filter amplifier, a two-local-oscillator mixer, a two-local-oscillator filter amplifier, a one-local-oscillator mixer, a one-local-oscillator filter amplifier, a coupler, a numerical control attenuator A, an alternative analog switch B, a power amplifier, an isolator, a duplexer A and a harmonic filter which are connected in sequence;
the intermediate frequency signal generator is used for generating an intermediate frequency signal;
the intermediate frequency signal filter amplifier is used for amplifying and gaining the intermediate frequency signal;
the second local oscillator frequency mixer is used for mixing the second local oscillator signal generated by the frequency source module with the amplified intermediate frequency signal to obtain an intermediate frequency mixing signal;
the second local oscillator filter amplifier is used for carrying out filtering amplification gain on the intermediate frequency mixing signal;
the local oscillator frequency mixer is used for mixing the amplified intermediate frequency mixing signal with a local oscillator signal to obtain a radio frequency transmitting signal;
the radio frequency transmitting signal is divided into a high-frequency band radio frequency signal and a low-frequency band radio frequency signal by using an alternative analog switch B after being processed by a local oscillation filter amplifier, a coupler and a numerical control attenuator A; the high-frequency band radio frequency signal and the low-frequency band radio frequency signal are respectively sent to a duplexer A and finally output through a harmonic filter, a circulator and an antenna;
the receiving channel includes: the device comprises a duplexer B, a high-low frequency processing unit, an alternative analog switch C, a received signal amplifier, a received local oscillator mixer, a received filter amplifier, a numerical control attenuator B and a filter amplifier B;
the signals are input into a duplexer B of a receiving channel through an antenna and a circulator to select high and low frequency bands, high-band radio-frequency signals and low-band radio-frequency signals respectively pass through a high-low frequency processing unit and then pass through an alternative analog switch C, the received radio-frequency signals are amplified through a receiving signal amplifier, then the received radio-frequency signals and receiving local oscillation signals generated by a frequency source module are mixed through a receiving local oscillation mixer to obtain intermediate-frequency receiving signals, and the intermediate-frequency receiving signals are output after being processed through a receiving filter amplifier, a numerical control attenuator B and a filter amplifier B.
In the preferred embodiment of the present invention, the antenna is a directional antenna or an omni-directional antenna.
In the preferred embodiment of the present invention, the intermediate frequency signal generator is used for generating an intermediate frequency signal of 200 MHz.
The utility model discloses in the preferred scheme, two local oscillator signals of transmission that the frequency source module produced are two local oscillator signals of transmission of 1400 MHz.
The utility model discloses in the preferred scheme, the intermediate frequency mixing signal that two local oscillator signals of transmission and after enlargiing carries out the mixing and obtains 1200 MHz.
The utility model discloses in the preferred scheme, frequency source module produces three routes local oscillator signal through 100Hz crystal oscillator.
The utility model discloses in the preferred scheme, receive local oscillator mixer and carry out the mixing with the received radio frequency signal and the receipt local oscillator signal that frequency source module produced and obtain 500 MHz's intermediate frequency received signal.
In the preferred embodiment of the present invention, the harmonic filter is a MEMS, LTCC or MMIC filter.
The utility model discloses in the preferred scheme, numerical control attenuator A is that the attenuation range is 30 dB's numerical control attenuator A.
The utility model discloses in the preferred scheme, receive channel's high low frequency processing unit includes: the device comprises an amplitude limiter, a numerical control attenuator C, a low-noise amplifier and a high-pass filter.
To sum up, the utility model has the advantages of it is following:
the radio frequency assembly in the utility model can be independently assembled and debugged, and has the receiving and transmitting function and the frequency division full duplex working mode; the electromagnetic shielding device has good electromagnetic shielding performance and can ensure normal work in a complex electromagnetic environment.
Drawings
Fig. 1 is a schematic diagram of a radio frequency module according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a launch channel in an embodiment of the invention;
fig. 3 is a schematic diagram of a receiving channel according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a frequency source module according to an embodiment of the present invention;
fig. 5 is a schematic diagram of the connection between the high and low frequency processing units and the duplexer B and the one-out-of-two analog switch C according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1, the present invention provides a radio frequency assembly including an antenna, an alternative analog switch a, a circulator and a frequency source module. Referring to fig. 4, the frequency source module generates a signal through a crystal oscillator, and performs signal processing through a duplexer, an amplifier, a phase-locked loop, and a filter amplifier in sequence to obtain three local oscillator signals. The antenna is a main component for signal transmission and reception, and the antenna may preferably be a directional antenna or an omnidirectional antenna, and when the directional antenna is selected, two sets of directional antennas, namely a first directional antenna and a second directional antenna, may be provided.
The frequency source module generates three local oscillation signals through a 100Hz crystal oscillator, namely receiving local oscillation signals, transmitting a first local oscillation signal and transmitting a second local oscillation signal. The transmitting two-local-oscillator signal generated by the frequency source module is a transmitting two-local-oscillator signal of 1400 MHz.
Be connected with receiving channel and transmission channel on the circulator, the receipt and the transmission of signal are two independent passageways, make the utility model discloses a radio frequency assembly can realize the transmission and the receipt of signal.
Referring to fig. 2, the transmitting channel includes an intermediate frequency signal generator, an intermediate frequency signal filtering amplifier, a two-local oscillator mixer, a two-local oscillator filtering amplifier, a one-local oscillator mixer, a one-local oscillator filtering amplifier, a coupler, a numerical control attenuator a, an alternative analog switch B, a power amplifier, an isolator, a duplexer a, and a harmonic filter, which are connected in sequence, and the harmonic filter is connected with the circulator.
The intermediate frequency signal generator is used for generating an intermediate frequency signal of 200 MHz; the intermediate frequency signal filter amplifier is used for amplifying and gaining the intermediate frequency signal; the second local oscillator mixer is used for mixing the transmitting second local oscillator signal generated by the frequency source module with the amplified intermediate frequency signal to obtain an intermediate frequency mixing signal of 1200 MHz;
the second local oscillator filter amplifier is used for carrying out filtering amplification gain on the intermediate frequency mixing signal; and the local oscillator frequency mixer is used for mixing the amplified intermediate frequency mixing signal with a transmitting local oscillator signal to obtain a radio frequency transmitting signal.
The radio frequency transmitting signal is divided into a high-frequency band radio frequency signal and a low-frequency band radio frequency signal by using an alternative analog switch B after being processed by a local oscillation filter amplifier, a coupler and a numerical control attenuator A; the high-frequency band radio frequency signal and the low-frequency band radio frequency signal are respectively sent to the duplexer A and finally output through the harmonic filter, the circulator and the antenna.
Referring to fig. 3, the receiving channel includes a duplexer B, a high/low frequency processing unit, an alternative analog switch C, a received signal amplifier, a received local oscillation mixer, a received filter amplifier, a digital controlled attenuator B, and a filter amplifier B, and the duplexer B of the receiving channel is connected to the circulator.
The signals are input into a duplexer B of a receiving channel through an antenna and a circulator to select high and low frequency bands, high-band radio-frequency signals and low-band radio-frequency signals respectively pass through a high-low frequency processing unit and then pass through an alternative analog switch C, the received radio-frequency signals are amplified through a receiving signal amplifier, then the received radio-frequency signals and receiving local oscillation signals generated by a frequency source module are mixed through a receiving local oscillation mixer to obtain 500MHz intermediate-frequency receiving signals, and the intermediate-frequency receiving signals are output after being processed through a receiving filter amplifier, a numerical control attenuator B and a filter amplifier B.
In the implementation of the present invention, the harmonic filter is a MEMS, LTCC or MMIC filter. The numerical control attenuator A is a numerical control attenuator A with an attenuation range of 30 dB.
Referring to fig. 5, in an embodiment of the present invention, the high and low frequency processing unit of the receiving channel includes: the device comprises an amplitude limiter, a numerical control attenuator C, a low-noise amplifier and a high-pass filter.
The utility model provides a transmission channel's main is with intermediate frequency signal through the secondary frequency conversion, commutates to other wave bands after, goes out through omnidirectional antenna or directional antenna radiation. The receiving channel completes the conversion from the radio frequency signal to the intermediate frequency signal, and carries out frequency conversion and amplification on the weak signal.
Specifically, the transmitting channel filters, amplifies and gain-adjusts the 200MHz intermediate frequency signal, mixes the signal with the 1400MHz signal generated by the frequency source module to obtain a 1200MHz intermediate frequency signal, the 1200MHz intermediate frequency signal is filtered and amplified, then mixes the signal with the signal generated by the frequency source module, then is filtered, amplified, numerically-controlled attenuated, then is divided into high and low frequency bands through the alternative analog switch B, and is respectively amplified and isolated, and then is sent to the duplexer a, and is output after being selected by the circulator and the antenna through the harmonic filter.
The receiving channel enters a duplexer B for selecting high and low frequency bands after passing through an antenna selection switch and a circulator, two sections of signals respectively pass through an alternative analog switch C after amplitude limiting, numerical control attenuation, low noise amplification and filtering, the signals are subjected to frequency mixing with a receiving local oscillator generated by a frequency source module after being amplified again to obtain 500MHz signals, and the 500MHz signals are output after being subjected to high and low pass filtering after being subjected to filtering, amplification, attenuation and gain adjustment.
While the present invention has been described in detail and with reference to the accompanying drawings, it is not to be considered as limited to the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (10)
1. A radio frequency component is characterized by comprising an antenna, an alternative analog switch A, a circulator and a frequency source module;
the frequency source module generates three local oscillation signals through a crystal oscillator, namely receiving the local oscillation signals, transmitting a first local oscillation signal and transmitting a second local oscillation signal;
the circulator is connected with a receiving channel and a transmitting channel;
the transmitting channel comprises an intermediate frequency signal generator, an intermediate frequency signal filter amplifier, a two-local-oscillator mixer, a two-local-oscillator filter amplifier, a one-local-oscillator mixer, a one-local-oscillator filter amplifier, a coupler, a numerical control attenuator A, an alternative analog switch B, a power amplifier, an isolator, a duplexer A and a harmonic filter which are connected in sequence;
the intermediate frequency signal generator is used for generating an intermediate frequency signal;
the intermediate frequency signal filter amplifier is used for amplifying and gaining the intermediate frequency signal;
the second local oscillator frequency mixer is used for mixing the second local oscillator signal generated by the frequency source module with the amplified intermediate frequency signal to obtain an intermediate frequency mixing signal;
the second local oscillator filter amplifier is used for carrying out filtering amplification gain on the intermediate frequency mixing signal;
the local oscillator frequency mixer is used for mixing the amplified intermediate frequency mixing signal with a local oscillator signal to obtain a radio frequency transmitting signal;
the radio frequency transmitting signal is divided into a high-frequency band radio frequency signal and a low-frequency band radio frequency signal by using an alternative analog switch B after being processed by a local oscillation filter amplifier, a coupler and a numerical control attenuator A; the high-frequency band radio frequency signal and the low-frequency band radio frequency signal are respectively sent to a duplexer A and finally output through a harmonic filter, a circulator and an antenna;
the receiving channel includes: the device comprises a duplexer B, a high-low frequency processing unit, an alternative analog switch C, a received signal amplifier, a received local oscillator mixer, a received filter amplifier, a numerical control attenuator B and a filter amplifier B;
the signals are input into a duplexer B of a receiving channel through an antenna and a circulator to select high and low frequency bands, high-band radio-frequency signals and low-band radio-frequency signals respectively pass through a high-low frequency processing unit and then pass through an alternative analog switch C, the received radio-frequency signals are amplified through a receiving signal amplifier, then the received radio-frequency signals and receiving local oscillation signals generated by a frequency source module are mixed through a receiving local oscillation mixer to obtain intermediate-frequency receiving signals, and the intermediate-frequency receiving signals are output after being processed through a receiving filter amplifier, a numerical control attenuator B and a filter amplifier B.
2. The radio frequency assembly of claim 1, wherein: the antenna is a directional antenna or an omnidirectional antenna.
3. The radio frequency assembly of claim 1, wherein: the intermediate frequency signal generator is used for generating an intermediate frequency signal of 200 MHz.
4. The radio frequency assembly of claim 1, wherein: the transmitting two-local-oscillator signal generated by the frequency source module is a transmitting two-local-oscillator signal of 1400 MHz.
5. The radio frequency assembly of claim 1, wherein: and the transmitting two local oscillation signals and the amplified intermediate frequency signals are subjected to frequency mixing to obtain 1200MHz intermediate frequency mixing signals.
6. The radio frequency assembly of claim 1, wherein: the frequency source module generates three local oscillation signals through a 100Hz crystal oscillator.
7. The radio frequency assembly of claim 1, wherein: and the receiving local oscillator frequency mixer mixes the received radio frequency signal with a receiving local oscillator signal generated by the frequency source module to obtain an intermediate frequency receiving signal of 500 MHz.
8. The radio frequency assembly of claim 1, wherein: the harmonic filter is an MEMS, LTCC or MMIC filter.
9. The radio frequency assembly of claim 1, wherein: the numerical control attenuator A is a numerical control attenuator A with an attenuation range of 30 dB.
10. The radio frequency assembly of claim 1, wherein: the high and low frequency processing unit of the receiving channel comprises: the device comprises an amplitude limiter, a numerical control attenuator C, a low-noise amplifier and a high-pass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121647965.1U CN214480596U (en) | 2021-07-20 | 2021-07-20 | Radio frequency assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121647965.1U CN214480596U (en) | 2021-07-20 | 2021-07-20 | Radio frequency assembly |
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| Publication Number | Publication Date |
|---|---|
| CN214480596U true CN214480596U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121647965.1U Active CN214480596U (en) | 2021-07-20 | 2021-07-20 | Radio frequency assembly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115133945A (en) * | 2022-05-11 | 2022-09-30 | 深圳市有方科技股份有限公司 | Signal processing device and method |
| CN116054864A (en) * | 2022-11-28 | 2023-05-02 | 中国电子科技集团公司第十研究所 | High-power full duplex communication device and duplex communication method |
-
2021
- 2021-07-20 CN CN202121647965.1U patent/CN214480596U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115133945A (en) * | 2022-05-11 | 2022-09-30 | 深圳市有方科技股份有限公司 | Signal processing device and method |
| CN115133945B (en) * | 2022-05-11 | 2024-04-12 | 东莞有方物联网科技有限公司 | Signal processing device and method |
| CN116054864A (en) * | 2022-11-28 | 2023-05-02 | 中国电子科技集团公司第十研究所 | High-power full duplex communication device and duplex communication method |
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