Transceiver and communication system

Abstract

The embodiment of the utility model discloses a transceiver and a communication system, and the transceiver comprises an intermediate frequency transmitting port, an intermediate frequency receiving port, an up-conversion module, a down-conversion module, a circular polarization feed source unit, a demodulation unit, a control unit and a sound unit, the demodulation unit is used for receiving a receiving strength signal output by an external demodulation device through the intermediate frequency receiving port and demodulating the receiving strength signal to obtain a sound effect selection signal, the output end of the demodulation unit is connected with the input end of the control unit, and the demodulation unit is used for inputting the sound effect selection signal to the control unit; the control unit is used for generating a corresponding PWM pulse signal according to the sound effect selection signal, the output end of the control unit is connected with the input end of the sound unit, and the sound unit is used for emitting sound corresponding to the sound effect selection signal according to the PWM pulse signal output by the control unit. The satellite finding operator is reminded of receiving signal strength, azimuth angle deviation during satellite finding is avoided, and the satellite finding operator is assisted in correcting the azimuth angle in time.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of communication technology, and in particular to an all-in-one transceiver and a communication system. Background Art

[0002] Currently, in satellite communication systems, ground terminals need to fully align their antennas with the target satellite to achieve the best signal-to-noise ratio and transmit more data bandwidth. Due to cost and reliability reasons, satellite communication operators often do not configure high-cost automatic satellite alignment equipment in the communication systems of fixed small station terminals, and only equip them with a simple parabolic antenna. In actual usage scenarios, the complete communication unit is divided into indoor units and outdoor units. The outdoor unit includes an integrated transceiver and antenna. The outdoor unit is generally installed on the roof of a building or on the top of a communication tower. The indoor unit is mainly a demodulator and is placed indoors. The two units are relatively far apart. Satellite search operators need to manually adjust the antenna direction to align with the target satellite.

[0003] However, while the star seeker is adjusting the antenna direction, other personnel are required to pay attention to the received signal strength information and feed it back to the star seeker for antenna angle adjustment. This requires high cooperation from the personnel and may cause the star seeker to be unable to accurately adjust the antenna to the optimal azimuth angle due to untimely information feedback from both parties. The antenna angle needs to be adjusted repeatedly, which is inefficient and difficult to operate. Utility Model Content

[0004] The embodiment of the present invention provides an all-in-one transceiver and a communication system, which solves the problem in the related art that the satellite search operator needs the cooperation of other personnel to adjust the antenna direction, and is prone to the problem that due to the untimely information feedback between the two parties, the satellite search operator cannot accurately adjust the antenna to the optimal azimuth angle, and needs to repeatedly adjust the antenna angle, which is inefficient and difficult to operate. During the satellite search process, a corresponding sound is emitted according to the receiving strength signal output by the demodulation device to remind the satellite search operator of the strength information of the receiving signal, avoid azimuth deviation during satellite search, assist the satellite search operator to correct the azimuth angle in time, and finally find the azimuth angle with the strongest receiving signal strength, meeting the needs of fast satellite networking of fixed small station terminals, without the need for cooperation of other personnel, reducing labor costs, and being suitable for large-scale, low-cost commercial promotion of fixed small station satellite terminals.

[0005] In a first aspect, an embodiment of the present invention provides a transceiver, comprising: an intermediate frequency transmitting port, an intermediate frequency receiving port, an up-conversion module, a down-conversion module, a circularly polarized feed unit, a demodulation unit, a control unit, and a sound unit;

[0006] The intermediate frequency transmission port is connected to the input end of the up-conversion module, and the up-conversion module is used to perform up-conversion processing on the first intermediate frequency signal received through the intermediate frequency transmission port to obtain a first radio frequency signal. The output end of the up-conversion module is connected to the first polarization end of the circular polarization feed unit, and is used to input the first radio frequency signal into the circular polarization feed unit. The circular polarization feed unit is used to convert the first radio frequency signal into a circular polarization signal and radiate it;

[0007] The circularly polarized feed unit is further configured to convert the received second radio frequency signal into a linearly polarized signal. The second polarization end of the circularly polarized feed unit is connected to the input end of the down-conversion module, so as to input the linearly polarized signal into the down-conversion module. The down-conversion module is configured to perform down-conversion processing on the linearly polarized signal to obtain a second intermediate frequency signal. The output end of the down-conversion module is connected to the intermediate frequency receiving port, so as to output the second intermediate frequency signal to an external demodulation device through the intermediate frequency receiving port.

[0008] The intermediate frequency receiving port is connected to the input end of the demodulation unit, and the demodulation unit is used to receive the reception strength signal output by the external demodulation device through the intermediate frequency receiving port, and demodulate the reception strength signal to obtain a sound effect selection signal. The output end of the demodulation unit is connected to the input end of the control unit, and is used to input the sound effect selection signal into the control unit. The control unit is used to generate a corresponding PWM pulse signal according to the sound effect selection signal. The output end of the control unit is connected to the input end of the sound unit, and the sound unit is used to emit a sound corresponding to the sound effect selection signal according to the PWM pulse signal output by the control unit.

[0009] Optionally, the demodulation unit includes a first capacitor, a low-pass filter, a first amplifier, a second capacitor, a first detection diode, a second detection diode, a first resistor, a second resistor, a third resistor, a fourth resistor and a voltage comparator;

[0010] The first end of the first capacitor is connected to the intermediate frequency receiving port, the second end of the first capacitor is connected to the input end of the low-pass filter, the output end of the low-pass filter is connected to the input end of the first amplifier, the output end of the first amplifier is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the negative terminal of the first detection diode, the positive terminal of the first detection diode is connected to the first end of the second resistor, the second end of the second resistor is connected to the first end of the first resistor and the inverting input end of the voltage comparator, the second end of the first resistor is used to access a first reference voltage, the output end of the voltage comparator is connected to the input end of the control unit, the second end of the second capacitor is connected to the positive terminal of the second detection diode, the negative terminal of the second detection diode is connected to the first end of the third resistor, the second end of the third resistor is connected to the first end of the fourth resistor and the non-inverting input end of the voltage comparator, and the second end of the fourth resistor is grounded.

[0011] Optionally, the up-conversion module includes a first intermediate frequency filtering unit, a first intermediate frequency amplifying unit, a first mixer, a first signal generator, a septum-type cavity filter, and a second amplifier;

[0012] The input end of the first intermediate frequency filtering unit is connected to the intermediate frequency transmitting port, the output end of the first intermediate frequency filtering unit is connected to the input end of the first intermediate frequency amplifying unit, the output end of the first intermediate frequency amplifying unit is connected to the first input end of the first mixer, the second input end of the first mixer is connected to the output end of the first signal generator, the output end of the first mixer is connected to the input end of the septum-type cavity filter, the output end of the septum-type cavity filter is connected to the input end of the second amplifier, and the output end of the second amplifier is connected to the first polarization end of the circularly polarized feed unit.

[0013] Optionally, the down-conversion module includes a second intermediate frequency filtering unit, a second intermediate frequency amplifying unit, a second mixer, a second signal generator, a third amplifier and a stop filter;

[0014] The input end of the stop filter is connected to the second polarization end of the circularly polarized feed unit, the output end of the stop filter is connected to the input end of the third amplifier, the output end of the third amplifier is connected to the first input end of the second mixer, the second input end of the second mixer is connected to the output end of the second signal generator, the output end of the second mixer is connected to the input end of the second intermediate frequency amplification unit, the output end of the second intermediate frequency amplification unit is connected to the input end of the second intermediate frequency filtering unit, and the output end of the second intermediate frequency filtering unit is connected to the intermediate frequency receiving port.

[0015] Optionally, the first intermediate frequency amplification unit includes an equalizer circuit and at least one intermediate frequency amplification circuit connected in sequence, or at least one intermediate frequency amplification circuit and an equalizer circuit connected in sequence.

[0016] Optionally, the second intermediate frequency amplification unit includes a single-stage intermediate frequency amplification circuit or multiple stages of intermediate frequency amplification circuits connected in sequence.

[0017] Optionally, the intermediate frequency amplification circuit includes a third capacitor, a fourth amplifier, a fourth capacitor, a fifth capacitor, a magnetic bead, a sixth capacitor, a seventh capacitor and a first inductor;

[0018] The first end of the third capacitor is used to receive an intermediate frequency signal, the second end of the third capacitor is connected to the input end of the fourth amplifier, the output end of the fourth amplifier is connected to the first end of the fourth capacitor, the second end of the fourth capacitor is used to output the amplified intermediate frequency signal, the first end of the fifth capacitor is used to access a second reference voltage, the second end of the fifth capacitor is grounded, the first end of the magnetic bead is connected to the first end of the fifth capacitor, the second end of the magnetic bead is connected to the first end of the sixth capacitor, the second end of the sixth capacitor is grounded, the first end of the seventh capacitor is connected to the first end of the sixth capacitor, the second end of the seventh capacitor is grounded, the first end of the first inductor is connected to the first end of the seventh capacitor, and the second end of the first inductor is connected to the output end of the fourth amplifier.

[0019] Optionally, the equalizer circuit includes an attenuator, a first varactor diode, a second inductor, an eighth capacitor, a second varactor diode, a third inductor, a ninth capacitor, a third varactor diode, and a fourth inductor;

[0020] The first input terminal of the attenuator is used to receive an intermediate frequency signal, the second input terminal of the attenuator is used to receive a first control voltage, the output terminal of the attenuator is connected to the cathode terminal of the first varactor diode, the cathode terminal of the first varactor diode is used to receive a second control voltage, the positive terminal of the first varactor diode is connected to the first terminal of the second inductor, the second terminal of the second inductor is grounded, the cathode terminal of the first varactor diode is connected to the first terminal of the eighth capacitor, the second terminal of the eighth capacitor is connected to the cathode terminal of the second varactor diode, the cathode terminal of the second varactor diode is used to receive a third control voltage, the positive terminal of the second varactor diode is connected to the first terminal of the third inductor, the second terminal of the third inductor is grounded, the cathode terminal of the second varactor diode is connected to the first terminal of the ninth capacitor, the second terminal of the ninth capacitor is connected to the cathode terminal of the third varactor diode, the cathode terminal of the third varactor diode is used to receive a fourth control voltage, the positive terminal of the third varactor diode is connected to the first terminal of the fourth inductor, the second terminal of the fourth inductor is grounded, and the cathode terminal of the third varactor diode is further used to output the intermediate frequency signal after gain compensation.

[0021] Optionally, a power supply module is also included, wherein the first input end and the second input end of the power supply module are respectively connected to the intermediate frequency receiving port and the intermediate frequency transmitting port, for receiving power from an external power supply, and the power supply module is used to supply power to the internal components of the transceiver.

[0022] In the second aspect, an embodiment of the present invention provides a communication system, which includes an indoor unit and an outdoor unit, the indoor unit including a demodulation device, the outdoor unit including a parabolic antenna and a transceiver as described in any embodiment of the present invention, the first signal end of the demodulation device is connected to the intermediate frequency transmitting port of the transceiver, and is used to input a first intermediate frequency signal to the up-conversion module, and the second signal end of the demodulation device is connected to the intermediate frequency receiving port of the transceiver, and is used to receive the second intermediate frequency signal output by the down-conversion module, or to input a reception strength signal to the demodulation unit.

[0023] In an embodiment of the present invention, the transceiver includes an intermediate frequency transmitting port, an intermediate frequency receiving port, an up-conversion module, a down-conversion module, a circularly polarized feed unit, a demodulation unit, a control unit and a sound unit, wherein the demodulation unit is used to receive a receiving strength signal output by an external demodulation device through the intermediate frequency receiving port, and demodulate the receiving strength signal to obtain a sound effect selection signal. The output end of the demodulation unit is connected to the input end of the control unit, and is used to input the sound effect selection signal into the control unit. The control unit is used to generate a corresponding PWM pulse signal according to the sound effect selection signal. The output end of the control unit is connected to the input end of the sound unit, and the sound unit is used to emit a sound corresponding to the sound effect selection signal according to the PWM pulse signal output by the control unit. During the satellite search process, a corresponding sound is emitted according to the receiving strength signal output by the demodulation equipment, reminding the satellite search operator of the strength information of the receiving signal, avoiding azimuth deviation during satellite search, assisting the satellite search operator to correct the azimuth in time, and finally finding the azimuth with the strongest receiving signal strength, meeting the needs of fast satellite networking of fixed small station terminals, without the need for cooperation from other personnel, reducing labor costs, and being suitable for large-scale, low-cost commercial promotion of fixed small station satellite terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic structural diagram of a transceiver provided in an embodiment of the present utility model;

[0025] Figure 2 A schematic structural diagram of a circularly polarized feed unit provided in an embodiment of the present invention;

[0026] Figure 3 A schematic structural diagram of a feed horn in a circularly polarized feed unit provided by an embodiment of the present invention;

[0027] Figure 4 A schematic structural diagram of an up-conversion module provided in an embodiment of the present utility model;

[0028] Figure 5 A schematic structural diagram of a spacer-type cavity filter provided by an embodiment of the present utility model;

[0029] Figure 6 A circuit schematic diagram of an intermediate frequency amplifier circuit provided in an embodiment of the present utility model;

[0030] Figure 7 A circuit schematic diagram of an equalizer circuit provided by an embodiment of the present utility model;

[0031] Figure 8 A schematic structural diagram of a down-conversion module provided in an embodiment of the present utility model;

[0032] Figure 9A schematic structural diagram of a transmission-blocking filter provided in an embodiment of the present utility model;

[0033] Figure 10 Schematic diagram of a 22kHz carrier wave when transmitting different bytes of an example;

[0034] Figure 11 A circuit schematic diagram of a demodulation unit provided in an embodiment of the present utility model;

[0035] Figure 12 A schematic diagram of setting detection points for a demodulation unit according to an embodiment of the present invention;

[0036] Figure 13 This is a detection waveform diagram obtained by performing signal detection on the demodulation unit provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0037] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions of the embodiments of the present invention, rather than all structures.

[0038] The terms "first," "second," and the like in the specification and claims of the present invention are used to distinguish similar objects, not to describe a specific order or precedence. It should be understood that such terms are interchangeable where appropriate, so that embodiments of the present invention can be implemented in an order other than that illustrated or described herein. The terms "first," "second," and the like generally distinguish objects of a class and do not limit the number of objects. For example, the first object can be one or more, and should not be construed as indicating or implying relative importance. Furthermore, the terms "and / or" in the specification and claims refer to at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the connected objects. Furthermore, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," "connected," and "in series" should be interpreted broadly, meaning, for example, fixed, removable, or integral; mechanically or electrically; directly or indirectly through an intermediary; or internally between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention.

[0039] In satellite communication systems, ground terminals must fully align their antennas with the target satellite to achieve the optimal signal-to-noise ratio and transmit more data bandwidth. To quickly align the ground terminal's antenna with the target satellite and achieve rapid networking, various automatic satellite search and tracking methods have been proposed. These methods utilize a combination of technologies, including a multifunctional antenna controller, GPS (Global Positioning System) automatic positioning, satellite-based inertial navigation, satellite tracking control systems, antenna tracking control software, and ephemeris prediction software, to achieve automatic satellite alignment. These technologies can achieve rapid positioning and establish networking with satellites in the context of satellite-based portable stations and mobile stations. However, these complex technologies are costly in terms of hardware and software systems, as well as subsequent maintenance costs. These technologies are only suitable for high-end applications, such as military, commercial, and specialized vehicle-mounted on-the-go communications, and are not suitable for commercial deployment in large-scale, low-cost fixed-station satellite terminals. Consequently, a compact, integrated transceiver capable of assisting in satellite search has become an inevitable development trend.

[0040] For cost and reliability reasons, satellite communication operators often avoid installing expensive automatic alignment equipment in their fixed small-cell terminal communication systems, using only simple parabolic antennas. In actual use cases, a complete communication unit is divided into an indoor unit and an outdoor unit. The outdoor unit, consisting of a transceiver and antenna, is typically installed on a building roof or atop a communication tower. The indoor unit, consisting primarily of a demodulator, is located indoors, with the two units relatively far apart. While the satellite search operator adjusts the antenna's direction, additional personnel are required to monitor the received signal strength and provide feedback to the search operator for antenna angle adjustment. Since the antenna's orientation can only be manually aligned, deviations of even a few degrees during satellite search often lead to missed optimal angles, further deviating and requiring repeated adjustments, which is extremely inefficient. If the small-cell antenna is moved for any reason, such as site renovations or a severe typhoon causing the antenna to tilt, re-alignment is difficult for non-professionals, and re-establishing the network requires specialized equipment, hindering rapid recovery of the satellite communication network. Based on this, the embodiment of the utility model aims to provide an all-in-one transceiver and a communication system, which solves the problem in the related technology that the star-seeking operator needs the cooperation of other personnel to adjust the antenna direction, and it is easy to encounter the problem that due to the untimely information feedback between the two parties, the star-seeking operator cannot accurately adjust the antenna to the optimal azimuth angle, and needs to repeatedly adjust the antenna angle, which is inefficient and difficult to operate.

[0041] Figure 1 A schematic diagram of the structure of a transceiver provided by an embodiment of the present invention, such as Figure 1As shown, the transceiver includes an intermediate frequency transmitting port 101, an intermediate frequency receiving port 102, an up-conversion module 103, a down-conversion module 104, a circular polarization feed unit 105, a demodulation unit 106, a control unit 107 and a sound unit 108.

[0042] Specifically, the intermediate frequency transmission port 101 is connected to the input end of the up-conversion module 103, and the up-conversion module 103 is used to perform up-conversion processing on the first intermediate frequency signal received through the intermediate frequency transmission port 101 to obtain a first radio frequency signal. The output end of the up-conversion module 103 is connected to the first polarization end of the circular polarization feed unit 105, and is used to input the first radio frequency signal into the circular polarization feed unit 105. The circular polarization feed unit 105 is used to convert the first radio frequency signal into a circularly polarized signal and radiate it.

[0043] Among them, the intermediate frequency transmission port 101 can be used to receive the first intermediate frequency signal output by an external demodulation device, and the up-conversion module 103 can receive the first intermediate frequency signal through the intermediate frequency transmission port 101, and perform up-conversion processing on the first intermediate frequency signal to modulate the first intermediate frequency signal onto a high-frequency carrier to obtain the first radio frequency signal required for antenna transmission. Since the antenna needs to work in dual frequency, the high-end frequency band is the transmitting frequency band and the low-end frequency band is the receiving frequency band. The circularly polarized feed unit 105 can separate the signals of the two frequency bands so that they do not interfere with each other. The output end of the up-conversion module 103 is connected to the first polarization end of the circularly polarized feed unit 105, and the circularly polarized feed unit 105 can convert the linearly polarized first radio frequency signal into a circularly polarized signal and radiate it. In one embodiment, Figure 2 A schematic diagram of a circular polarization feed unit provided in an embodiment of the present invention is shown as follows: Figure 2 As shown, the circular polarization feed unit 105 includes a polarizer 201 and a feed horn 202 . Figure 3 A schematic structural diagram of a feed horn in a circularly polarized feed unit provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown, the feed horn 202 adopts a light wall type, which is designed according to different reflective surfaces to meet the direction requirements, and has the characteristics of low production cost and small size. Of course, other styles of circular polarization feed units can also be used, and this utility model is not limited here.

[0044] In one embodiment, Figure 4 A schematic diagram of the structure of an up-conversion module provided by an embodiment of the present utility model is shown in FIG. Figure 4As shown, the up-conversion module 103 includes a first intermediate frequency filter unit 1031, a first intermediate frequency amplification unit 1032, a first mixer 1033, a first signal generator 1034, a septum-type cavity filter 1035, and a second amplifier 1036. Specifically, the input end of the first intermediate frequency filter unit 1031 is connected to the intermediate frequency transmission port 101, the output end of the first intermediate frequency filter unit 1031 is connected to the input end of the first intermediate frequency amplification unit 1032, the output end of the first intermediate frequency amplification unit 1032 is connected to the first input end of the first mixer 1033, the second input end of the first mixer 1033 is connected to the output end of the first signal generator 1034, the output end of the first mixer 1033 is connected to the input end of the septum-type cavity filter 1035, the output end of the septum-type cavity filter 1035 is connected to the input end of the second amplifier 1036, and the output end of the second amplifier 1036 is connected to the first polarization end of the circularly polarized feed unit 105.

[0045] It should be noted that the first intermediate frequency filter unit 1031 can filter the input intermediate frequency signal and filter out irrelevant low-frequency signals. Among them, the first intermediate frequency filter unit 1031 can be a high-pass filter composed of an LC lumped parameter filter. Taking the intermediate frequency signal using a frequency above 950MHz as an example, the high-pass filter can filter out frequency signals below 950MHz by adjusting the inductance parameters of the inductor and the capacitance parameters of the capacitor, for example, the set 10MHz reference signal and 22KHz receiving strength signal to avoid interference from related signals. The first intermediate frequency amplification unit 1032 can be a gain amplification of the input intermediate frequency signal according to the gain required for signal transmission. The first signal generator 1034 can output a local oscillator signal according to the set local oscillator frequency, and the first mixer 1033 can up-convert the received intermediate frequency signal and local oscillator signal to obtain a radio frequency signal. Optionally, Figure 5 The schematic diagram of the structure of a diaphragm cavity filter provided by the embodiment of the present invention is a passive cavity structure filter. The diaphragm cavity filter 1035 has the characteristics of flat amplitude-frequency characteristics in the passband, low insertion loss, and high out-of-band suppression. It is conducive to making full use of the box space of the transceiver. The diaphragm cavity filter 1035 is made as follows. Figure 5 As shown, the septum-type cavity filter 1035 includes a septum 10351. By replacing the septum 10351, other operating frequency bands can be replaced to achieve the purpose of adjusting the passband frequency of the filter and meet the filtering requirements of the transmission signals of various frequency bands. In addition, due to the high out-of-band suppression of the septum-type cavity filter 1035, the up-conversion module 103 can select the mixer while meeting the low-cost conditions, ultimately meeting the spurious requirements of the output RF signal. The second amplifier 1036 can power amplify the signal output by the septum-type cavity filter 1035 to meet the transmission requirements.

[0046] Optionally, the first intermediate frequency amplification unit includes an equalizer circuit and at least one intermediate frequency amplification circuit connected in sequence, or at least one intermediate frequency amplification circuit and an equalizer circuit connected in sequence. The equalizer circuit can be used to adjust the gain at each frequency point to optimize the gain flatness of the overall output, and perform gain temperature compensation adjustment to ensure overall gain stability at various temperature stages.

[0047] In one embodiment, Figure 6 A circuit schematic diagram of an intermediate frequency amplifier circuit provided by an embodiment of the present utility model is shown in FIG. Figure 6 As shown, the intermediate frequency amplifier circuit includes a third capacitor C3, a fourth amplifier U4, a fourth capacitor C4, a fifth capacitor C5, a magnetic bead B1, a sixth capacitor C6, a seventh capacitor C7, and a first inductor L1. The first end of the third capacitor C3 is used to receive the intermediate frequency signal, the second end of the third capacitor C3 is connected to the input end of the fourth amplifier U4, the output end of the fourth amplifier U4 is connected to the first end of the fourth capacitor C4, the second end of the fourth capacitor C4 is used to output the amplified intermediate frequency signal, the first end of the fifth capacitor C5 is used to receive the second reference voltage Vcc, the second end of the fifth capacitor C5 is grounded, the first end of the magnetic bead B1 is connected to the first end of the fifth capacitor C5, the second end of the magnetic bead B1 is connected to the first end of the sixth capacitor C6, the second end of the sixth capacitor C6 is grounded, the first end of the seventh capacitor C7 is connected to the first end of the sixth capacitor C6, the second end of the seventh capacitor C7 is grounded, the first end of the first inductor L1 is connected to the first end of the seventh capacitor C7, and the second end of the first inductor L1 is connected to the output end of the fourth amplifier U4.

[0048] It should be noted that the third and fourth capacitors C3 and C4 can be used to block DC current from the coupled signal. The fifth, sixth, and seventh capacitors C5, C6, and C7, along with the first inductor L1, form a power bias circuit, providing a constant reference voltage for the amplifier and ensuring stable operation. Ferrite bead B1 can be used to control the on / off supply of the VCC power supply and suppress high-frequency noise and spike interference in the circuit. Optionally, multiple amplifiers can be connected in series, depending on the overall gain requirements.

[0049] In one embodiment, Figure 7 A circuit schematic diagram of an equalizer circuit provided by an embodiment of the present utility model is shown as follows: Figure 7As shown, the equalizer circuit includes an attenuator VGA, a first varactor diode DIO1, a second inductor L2, an eighth capacitor C8, a second varactor diode DIO2, a third inductor L3, a ninth capacitor C9, a third varactor diode DIO3, and a fourth inductor L4. Specifically, the first input terminal of the attenuator VGA is used to receive an intermediate frequency signal, the second input terminal of the attenuator VGA is used to receive a first control voltage Vt1, the output terminal of the attenuator VGA is connected to the cathode terminal of the first varactor diode DIO1, the cathode terminal of the first varactor diode DIO1 is used to receive a second control voltage Vt2, the anode terminal of the first varactor diode DIO1 is connected to the first terminal of the second inductor L2, the second terminal of the second inductor L2 is grounded, the cathode terminal of the first varactor diode DIO1 is connected to the first terminal of the eighth capacitor C8, the second terminal of the eighth capacitor C8 is connected to the cathode terminal of the second varactor diode DIO2, and the second varactor diode DIO2 is connected to the cathode terminal of the second varactor diode DIO2. The negative terminal of the second varactor diode DIO2 is used to access the third control voltage Vt3, the positive terminal of the second varactor diode DIO2 is connected to the first end of the third inductor L3, the second end of the third inductor L3 is grounded, the negative terminal of the second varactor diode DIO2 is connected to the first end of the ninth capacitor C9, the second end of the ninth capacitor C9 is connected to the negative terminal of the third varactor diode DIO3, the negative terminal of the third varactor diode DIO3 is used to access the fourth control voltage Vt4, the positive terminal of the third varactor diode DIO3 is connected to the first end of the fourth inductor L4, the second end of the fourth inductor L4 is grounded, and the negative terminal of the third varactor diode DIO3 is also used to output the intermediate frequency signal after gain compensation.

[0050] It should be noted that the first control voltage Vt1, the second control voltage Vt2, the third control voltage Vt3, and the fourth control voltage Vt4 can be provided by a control unit (not shown in the figure). The first control voltage Vt1 can control the gain attenuation of the attenuator VGA, implementing a gain temperature compensation control function. The first control voltage Vt1 is in the range of 0V-3.3V, which can adjust the gain to remain stable under various temperature conditions. In addition, each channel in the equalizer circuit can use different control parameters, corresponding to the second control voltage Vt2, the third control voltage Vt3, and the fourth control voltage Vt4, respectively, so that the gain deviation of different channels is maintained within a very small range, for example, the relative gain value of each sub-channel is within ±1.5dB. Therefore, the second control voltage Vt2, the third control voltage Vt3, and the fourth control voltage Vt4 function to compensate for the gain flatness within a single channel. Each control voltage controls a resonance point, and the three resonance points can compensate the gain flatness within the 1GHz bandwidth to a specification range of ≤±1.5dB. Of course, the aforementioned control parameters are not fixed values. The four control voltages can be continuously compensated at high and low temperatures to ensure that the gain and gain flatness over the entire temperature range meet the specification requirements, ultimately achieving an output signal that meets the performance requirements of spurious emission, gain flatness, and gain stability at different temperatures.

[0051] Specifically, the circularly polarized feed unit 105 is also used to convert the received second RF signal into a linearly polarized signal. The second polarization end of the circularly polarized feed unit 105 is connected to the input end of the down-conversion module 104, and is used to input the linearly polarized signal into the down-conversion module 104. The down-conversion module 104 is used to down-convert the linearly polarized signal to obtain a second intermediate frequency signal. The output end of the down-conversion module 104 is connected to the intermediate frequency receiving port 102, and is used to output the second intermediate frequency signal to an external demodulation device through the intermediate frequency receiving port 102.

[0052] The second polarization end of the circularly polarized feed unit 105 is connected to the input end of the down-conversion module 104. The circularly polarized feed unit 105 can convert the received circularly polarized second RF signal into a linearly polarized signal and input it to the down-conversion module 104. The up-conversion module 103 can down-convert the linearly polarized signal to reduce the carrier frequency of the linearly polarized signal and generate a corresponding second intermediate frequency signal. The intermediate frequency receiving port 102 can be used to output the second intermediate frequency signal to an external demodulation device.

[0053] In one embodiment, Figure 8 A schematic diagram of the structure of a down-conversion module provided by an embodiment of the present utility model is shown in FIG. Figure 8 As shown, the down-conversion module 104 includes a second intermediate frequency filtering unit 1041, a second intermediate frequency amplifying unit 1042, a second mixer 1043, a second signal generator 1044, a third amplifier 1045, and a blocking filter 1046. Specifically, the input end of the blocking filter 1046 is connected to the second polarization end of the circularly polarized feed unit 105, the output end of the blocking filter 1046 is connected to the input end of the third amplifier 1045, the output end of the third amplifier 1045 is connected to the first input end of the second mixer 1043, the second input end of the second mixer 1043 is connected to the output end of the second signal generator 1044, the output end of the second mixer 1043 is connected to the input end of the second intermediate frequency amplifying unit 1042, the output end of the second intermediate frequency amplifying unit 1042 is connected to the input end of the second intermediate frequency filtering unit 1041, and the output end of the second intermediate frequency filtering unit 1041 is connected to the intermediate frequency receiving port 102. Optionally, the second intermediate frequency amplifying unit 1042 includes a single-stage intermediate frequency amplifying circuit or multiple stages of intermediate frequency amplifying circuits connected in sequence.

[0054] It should be noted that Figure 9 A schematic diagram of the structure of a blocking filter provided by an embodiment of the present utility model is shown in FIG. Figure 9As shown, the blocking filter 1046 is designed based on the filtering structure of the transmitted KA-band signal. Developers can adapt the structure to actual filtering requirements, which is not limited by this invention. The blocking filter 1046 can filter the KA-band signal entering it, preventing the transmitted RF signal from entering the subsequent down-conversion process, thereby preventing interference with the normal operation of the receiving link. The blocking filter 1046 has low insertion loss and does not affect the overall noise figure of the receiving circuit. The third amplifier 1045 can be used to amplify the power of the input RF signal. The second signal generator 1044 can output a local oscillator signal according to the set local oscillator frequency. The second mixer 1043 can down-convert the received RF signal and local oscillator signal to obtain an intermediate frequency signal. The second intermediate frequency amplifier unit 1042 can be used to amplify the intermediate frequency signal to meet the power requirements of the system demodulation while preventing anomalies such as signal distortion and the generation of second harmonics. The second intermediate frequency filter unit 1041 can filter the input intermediate frequency signal to filter out irrelevant low-frequency signals.

[0055] Specifically, the intermediate frequency receiving port 102 is connected to the input end of the demodulation unit 106. The demodulation unit 106 is used to receive the receiving strength signal output by the external demodulation device through the intermediate frequency receiving port 102, and demodulate the receiving strength signal to obtain a sound effect selection signal. The output end of the demodulation unit 106 is connected to the input end of the control unit 107, and is used to input the sound effect selection signal to the control unit 107. The control unit 107 is used to generate a corresponding PWM pulse signal according to the sound effect selection signal. The output end of the control unit 107 is connected to the input end of the sound unit 108. The sound unit 108 is used to emit a sound corresponding to the sound effect selection signal according to the PWM pulse signal output by the control unit 107.

[0056] The external demodulation device can perform signal power analysis on the received signal received by the transceiver, generate reception strength signals corresponding to different sound effects, and feed the signals back to the transceiver. Optionally, the communication frequency between the transceiver and the external demodulation device can be 22 kHz. The demodulation unit 106 can demodulate the reception strength signal to obtain a sound effect selection signal, and the control unit 107 can generate a corresponding PWM pulse signal based on the sound effect selection signal to control the sound unit 108 to emit the sound corresponding to the sound effect.

[0057] In one embodiment, the external demodulation device and control unit 107 can be pre-configured with a unified signal encoding rule to ensure that the control unit 107 can correctly identify the demodulated sound effect selection signal. For example, the encoding format can be 500us (±100us) as 1 / 3 basic byte, with a 22kHz (±20%) carrier frequency and a period of 1 / 22ms. After sending one signal, a minimum of 10ms must pass before sending the next signal. Figure 10 The following is a diagram showing a 22kHz carrier wave when transmitting different bytes as an example. Figure 10 As shown in the following table, the 22kHz carrier in each '0' byte has 22 cycles, and the 22kHz carrier in each '1' byte has 11 cycles. The encoding format is shown in the following table 1:

[0058] Table 1

[0059] FRAMING P ADDRESS P COMMAND P DATA P

[0060] Among them, FRAMING is the start bit, P is the check bit, ADDRESS is the address bit, COMMAND is the command bit, and DATA is the data bit. It should be noted that there are an odd number of '1's in a 9-bit byte, and some instructions do not have data bits. All instructions have the high bit first and the low bit last. When sending multiple groups of instructions continuously, the interval between each group of instructions must be more than 15ms. For example, the relevant format of the start bit of the received instruction is shown in the following Table 2:

[0061] Table 2

[0062]

[0063]

[0064] For example, the format of the command bits is shown in Table 3 below:

[0065] Table 3

[0066] Hexadecimal Command Name Function Total transferred bytes 00 Enable satellite search assistance Satellite search is on 3 01 Turn off satellite search assistance Satellite search is closed 3

[0067] Optionally, the data bits may correspond to different reception strength signals to indicate different star-seeking adjustment stages. For example, the correspondence between different star-seeking adjustment stages and different sound effects is shown in Table 4 below:

[0068] Table 4

[0069]

[0070]

[0071] Thus, the external demodulation device can output a reception strength signal corresponding to a sound effect based on the trigger conditions corresponding to different satellite search adjustment stages. The control unit 107 can generate a corresponding PWM pulse signal based on the sound effect selection signal obtained by demodulating the reception strength signal, which is used to control the sound unit 108 to emit the corresponding sound effect. The satellite search operator can use the sound reminders of different sound effects to understand information such as the reception signal strength, whether a satellite signal is currently being received, and whether the antenna azimuth angle is deviating and is gradually deviating, allowing them to quickly adjust the antenna to complete the satellite search.

[0072] The above-mentioned method realizes that during the satellite search process, a corresponding sound is emitted according to the receiving strength signal output by the demodulation equipment, which reminds the satellite search operator of the strength information of the receiving signal, avoids azimuth deviation during satellite search, assists the satellite search operator to correct the azimuth in time, and finally finds the azimuth with the strongest receiving signal strength, meeting the needs of fast satellite networking of fixed small station terminals, without the need for cooperation of other personnel, reducing labor costs, and is suitable for the commercial promotion of large-scale and low-cost fixed small station satellite terminals.

[0073] In one embodiment, the sound unit 108 can be a speaker or a buzzer. Taking the buzzer as an example, the control unit 107 can drive the buzzer to emit sounds corresponding to different sound effects by outputting different PWM pulse signals. It should be noted that PWM (Pulse Width Modulation) can control the circuit by changing the duty cycle of the signal. In the PWM signal, the period is fixed, and the duty cycle can be adjusted according to demand. By adjusting the duty cycle, the size of the physical quantities such as voltage and current output by the control circuit can be controlled, thereby achieving control of the circuit. The PWM frequency refers to the number of moments from high level time to low level time and then from low level to high level in 1 second, that is, the number of PWM cycles in 1 second. The PWM period refers to the time from high level time to low level time in 1 second. Therefore, in order for the buzzer to emit sounds with different sound effects, it is necessary to modulate the PWM pulse signal output by the control unit 107. For example, the software code design of the control unit 107 is as follows:

[0074] TIM_TimeBaseStructure.TIM_Period=1; / / When the timer counts from 0 to 255, that is 256 times, which is one cycle;

[0075] TIM_TimeBaseStructure.TIM_Prescaler = 72-1; / / Set prescaler

[0076] TIM_TimeBaseStructure.TIM_ClockDivision = 0; / / Set the frequency division coefficient: no frequency division

[0077] TIM_0CInitStructure.TIM_Pulse = 0; / / duty cycle is 0

[0078] As can be seen from the above, if the pre-division value is 71, then the frequency is divided by 72, where the specific frequency division can be set according to the needs. For the convenience of calculation, the embodiment of the utility model is set to 72 frequency division. Since the default system clock frequency of the control chip is 72MHz, it is 1MHz after division. The timer counts 1M times in 1 second, and since f=1 / T, it can be known that any frequency f can be obtained by changing the period T. Specifically, the value of the automatic reload register period can be modified through the firmware library function TIM_SetAutoreload(TIM_TypeDef*TIMx,uint16_tAutoreload) to obtain a PWM output of any frequency, and the comparison value in the comparison register can be modified through the firmware library function TIM_SetCompare1(TIM_TypeDef*TIMx,uint16_t Compare1) to change the duty cycle of the PWM output.

[0079] For example, the correspondence between pitch and frequency is shown in Table 5 below:

[0080] Table 5

[0081]

[0082]

[0083] Therefore, by referring to Table 5, adjusting the PWM output frequency can control the buzzer to emit different tones, achieving different sound effects. For example, the divided frequency is 1MHz, and f = 1 / T. Since the frequency is known, the required T value can be calculated. For example, T = 1000000 / 277 for bass 1#. The firmware library function instruction for PWM output with frequency f is TIM_SetAutoreload(TIM1, (1000000 / f)), and the duty cycle firmware library instruction is TIM_SetCompare1(TIM1, (1000000 / f) / 15).

[0084] In one embodiment, Figure 11 A circuit schematic diagram of a demodulation unit provided in an embodiment of the present utility model is shown in FIG. Figure 11 As shown, the demodulation unit 106 includes a first capacitor C1, a low-pass filter U1, a first amplifier U2, a second capacitor C2, a first detection diode D1, a second detection diode D2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a voltage comparator U3;

[0085] A first end of the first capacitor C1 is connected to the intermediate frequency receiving port 102, a second end of the first capacitor C1 is connected to the input end of the low-pass filter U1, an output end of the low-pass filter U1 is connected to the input end of the first amplifier U2, an output end of the first amplifier U2 is connected to the first end of the second capacitor C2, a second end of the second capacitor C2 is connected to the cathode end of the first detection diode D1, a positive end of the first detection diode D1 is connected to the first end of the second resistor R2, a second end of the second resistor R2 is connected to the first end of the first resistor R1 and the inverting input end of the voltage comparator U3, a second end of the first resistor R1 is used to receive a first reference voltage, for example, 3.3V, an output end of the voltage comparator U3 is connected to the input end of the control unit 107, a second end of the second capacitor C2 is connected to the anode end of the second detection diode D2, a cathode end of the second detection diode D2 is connected to the first end of the third resistor R3, a second end of the third resistor R3 is connected to the first end of the fourth resistor R4 and the non-inverting input end of the voltage comparator U3, and a second end of the fourth resistor R4 is grounded.

[0086] Among them, the intermediate frequency receiving port 102 can input the reception strength signal, and the first capacitor C1 and the second capacitor C2 can be used as coupling capacitors to isolate the DC signal. Since the first amplifier U2 does not allow a DC component, and the subsequent detection signal does not require a DC component, the first capacitor C1 can isolate the DC power supply introduced by the intermediate frequency receiving port 102, and the second capacitor C2 can isolate the power supply of the first amplifier U2. The low-pass filter U1 can be a lumped parameter filter for filtering out the intermediate frequency signal and the reference signal of the intermediate frequency receiving port 102 to avoid interference with the demodulation of the reception strength signal, and ultimately ensure that only the reception strength signal passes through the low-pass filter U1 and continues to be power amplified to meet the demodulation conditions for demodulation. In one embodiment, the reception strength signal is set to a 22KHz signal. There may be an intermediate frequency signal and a 10MHz reference signal in the communication link. These signals need to be filtered out to avoid interfering with the normal operation of the entire demodulation unit 106. The low-pass filter U1 can be designed to be composed of capacitors and inductors, and the corresponding component parameters are determined by simulation according to the filtering requirements. Optionally, if higher suppression requirements are required for the 10MHz reference signal, a multi-order low-pass filter can be designed. The actual demodulation results can be combined to determine whether the low-pass filter meets the requirements, thereby obtaining the required component parameters for the low-pass filter. The first detector diode D1 and the second detector diode D2 can be used to detect the amplified received strength signal. The first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 can be used to adjust the duty cycle of the output of the voltage comparator U3 so that the voltage comparator U3 outputs a square wave that can be recognized by the control unit 107.

[0087] In one embodiment, Figure 12A schematic diagram of setting detection points for a demodulation unit according to an embodiment of the present invention is provided, such as Figure 12 As shown, in Figure 11 On the basis of, a detection point 1 is set between the second capacitor C2 and the first detection diode D1, a detection point 2 is set at the inverting input terminal of the voltage comparator U3, a detection point 3 is set at the non-inverting input terminal of the voltage comparator U3, and a detection point 4 is set at the output terminal of the voltage comparator U3. Figure 13 The detection waveform diagram obtained by performing signal detection on the demodulation unit provided in the embodiment of the present utility model is as follows: Figure 13 As shown, waveform ① is a 22KHz waveform, which can be measured through detection point 1. It can be understood that since detection point 1 is placed after the second capacitor C2, the DC component has been isolated, and the signal has been amplified by the first amplifier U2, which can meet the demodulation conditions. Waveform ② is the envelope signal waveform of the upper half of waveform ①, specifically indicated by the dotted line. Waveform ③ can be measured through detection point 2. After the detection effect of the first detection diode D1, the lower half of the envelope signal waveform can be removed, and the upper half of the envelope signal waveform is retained. Moreover, since there is a voltage on the second resistor R2 when the first detection diode D1 is turned on, the voltage of the upper half of the envelope signal waveform increases. Waveform ④ is the envelope signal waveform of the lower half of waveform ①, specifically indicated by the dotted line. Waveform ⑤ can be measured at probe point 3. After detection by the second detector diode D2, the upper half of the envelope signal waveform is removed, retaining the lower half. Furthermore, since a voltage appears across the second resistor R3 when the second detector diode D2 is conducting, the voltage in the lower half of the envelope signal waveform increases. Waveform ⑥ is the result of the superposition of waveforms ③ and ⑤. Waveform 7, which can be measured at probe point 4, is the output of voltage comparator U3 and has a square wave shape. It can be understood that when the voltage at the non-inverting input of voltage comparator U3 is higher than the voltage at the inverting input, voltage comparator U3 outputs a high level; when the voltage at the non-inverting input of voltage comparator U3 is lower than the voltage at the inverting input, voltage comparator U3 outputs a low level. It should be noted that by adjusting the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4, the duty cycle of waveform ⑦ can be made 50%. For example, the duration of the high level in waveform ⑦ is 1ms, and the duration of the low level is 1ms, which corresponds to the 22kHz signal sent every 1ms for 1ms in waveform ①, that is, when 22KHz is sent, the output waveform of the voltage comparator U3 is a high level that lasts for 1ms. When there is no 22KHz signal, the output waveform of the voltage comparator U3 is a low level that lasts for 1ms. Thus, the demodulated waveform ⑦ that matches waveform ① can be completed, and the waveform ⑦ can meet the recognition requirements of the control unit 107.

[0088] In one embodiment, the transceiver also includes a power module, the first input end and the second input end of the power module are respectively connected to the intermediate frequency receiving port and the intermediate frequency transmitting port, for receiving power from an external power source, and the power module is used to supply power to the internal components of the transceiver.

[0089] An embodiment of the present invention also provides a communication system, which includes an indoor unit and an outdoor unit. The indoor unit includes a demodulation device, and the outdoor unit includes a parabolic antenna and a transceiver in any embodiment of the present invention. The first signal end of the demodulation device is connected to the intermediate frequency transmitting port of the transceiver, and is used to input a first intermediate frequency signal to the up-conversion module. The second signal end of the demodulation device is connected to the intermediate frequency receiving port of the transceiver, and is used to receive a second intermediate frequency signal output by the down-conversion module, or to input a reception strength signal to the demodulation unit. The transceiver has corresponding functions and beneficial effects.

[0090] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0091] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are readily apparent to those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the appended claims.

Claims

1. A transceiver, characterized in that: The transceiver comprises: an intermediate frequency transmitting port, an intermediate frequency receiving port, an up-conversion module, a down-conversion module, a circular polarization feed unit, a demodulation unit, a control unit and a sound unit; The intermediate frequency transmission port is connected to the input end of the up-conversion module, and the up-conversion module is used to perform up-conversion processing on the first intermediate frequency signal received through the intermediate frequency transmission port to obtain a first radio frequency signal. The output end of the up-conversion module is connected to the first polarization end of the circular polarization feed unit, and is used to input the first radio frequency signal into the circular polarization feed unit. The circular polarization feed unit is used to convert the first radio frequency signal into a circular polarization signal and radiate it; The circularly polarized feed unit is further configured to convert the received second radio frequency signal into a linearly polarized signal. The second polarization end of the circularly polarized feed unit is connected to the input end of the down-conversion module, so as to input the linearly polarized signal into the down-conversion module. The down-conversion module is configured to perform down-conversion processing on the linearly polarized signal to obtain a second intermediate frequency signal. The output end of the down-conversion module is connected to the intermediate frequency receiving port, so as to output the second intermediate frequency signal to an external demodulation device through the intermediate frequency receiving port. The intermediate frequency receiving port is connected to the input end of the demodulation unit, and the demodulation unit is used to receive the reception strength signal output by the external demodulation device through the intermediate frequency receiving port, and demodulate the reception strength signal to obtain a sound effect selection signal. The output end of the demodulation unit is connected to the input end of the control unit, and is used to input the sound effect selection signal into the control unit. The control unit is used to generate a corresponding PWM pulse signal according to the sound effect selection signal. The output end of the control unit is connected to the input end of the sound unit, and the sound unit is used to emit a sound corresponding to the sound effect selection signal according to the PWM pulse signal output by the control unit.

2. The transceiver according to claim 1, wherein: The demodulation unit includes a first capacitor, a low-pass filter, a first amplifier, a second capacitor, a first detection diode, a second detection diode, a first resistor, a second resistor, a third resistor, a fourth resistor and a voltage comparator; The first end of the first capacitor is connected to the intermediate frequency receiving port, the second end of the first capacitor is connected to the input end of the low-pass filter, the output end of the low-pass filter is connected to the input end of the first amplifier, the output end of the first amplifier is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the negative terminal of the first detection diode, the positive terminal of the first detection diode is connected to the first end of the second resistor, the second end of the second resistor is connected to the first end of the first resistor and the inverting input end of the voltage comparator, the second end of the first resistor is used to access a first reference voltage, the output end of the voltage comparator is connected to the input end of the control unit, the second end of the second capacitor is connected to the positive terminal of the second detection diode, the negative terminal of the second detection diode is connected to the first end of the third resistor, the second end of the third resistor is connected to the first end of the fourth resistor and the non-inverting input end of the voltage comparator, and the second end of the fourth resistor is grounded.

3. The all-in-one transceiver according to claim 1, wherein: The up-conversion module includes a first intermediate frequency filtering unit, a first intermediate frequency amplifying unit, a first mixer, a first signal generator, a septum cavity filter and a second amplifier; The input end of the first intermediate frequency filtering unit is connected to the intermediate frequency transmitting port, the output end of the first intermediate frequency filtering unit is connected to the input end of the first intermediate frequency amplifying unit, the output end of the first intermediate frequency amplifying unit is connected to the first input end of the first mixer, the second input end of the first mixer is connected to the output end of the first signal generator, the output end of the first mixer is connected to the input end of the septum-type cavity filter, the output end of the septum-type cavity filter is connected to the input end of the second amplifier, and the output end of the second amplifier is connected to the first polarization end of the circularly polarized feed unit.

4. The all-in-one transceiver according to claim 1, wherein: The down-conversion module includes a second intermediate frequency filtering unit, a second intermediate frequency amplifying unit, a second mixer, a second signal generator, a third amplifier and a stop filter; The input end of the stop filter is connected to the second polarization end of the circularly polarized feed unit, the output end of the stop filter is connected to the input end of the third amplifier, the output end of the third amplifier is connected to the first input end of the second mixer, the second input end of the second mixer is connected to the output end of the second signal generator, the output end of the second mixer is connected to the input end of the second intermediate frequency amplification unit, the output end of the second intermediate frequency amplification unit is connected to the input end of the second intermediate frequency filtering unit, and the output end of the second intermediate frequency filtering unit is connected to the intermediate frequency receiving port.

5. The all-in-one transceiver according to claim 3, wherein: The first intermediate frequency amplification unit includes an equalizer circuit and at least one intermediate frequency amplification circuit connected in sequence, or at least one intermediate frequency amplification circuit and an equalizer circuit connected in sequence.

6. The all-in-one transceiver according to claim 4, characterized in that: The second intermediate frequency amplifying unit includes a single-stage intermediate frequency amplifying circuit or multiple stages of intermediate frequency amplifying circuits connected in sequence.

7. The all-in-one transceiver according to claim 5 or 6, characterized in that: The intermediate frequency amplifier circuit includes a third capacitor, a fourth amplifier, a fourth capacitor, a fifth capacitor, a magnetic bead, a sixth capacitor, a seventh capacitor and a first inductor; The first end of the third capacitor is used to receive an intermediate frequency signal, the second end of the third capacitor is connected to the input end of the fourth amplifier, the output end of the fourth amplifier is connected to the first end of the fourth capacitor, the second end of the fourth capacitor is used to output the amplified intermediate frequency signal, the first end of the fifth capacitor is used to access a second reference voltage, the second end of the fifth capacitor is grounded, the first end of the magnetic bead is connected to the first end of the fifth capacitor, the second end of the magnetic bead is connected to the first end of the sixth capacitor, the second end of the sixth capacitor is grounded, the first end of the seventh capacitor is connected to the first end of the sixth capacitor, the second end of the seventh capacitor is grounded, the first end of the first inductor is connected to the first end of the seventh capacitor, and the second end of the first inductor is connected to the output end of the fourth amplifier.

8. The all-in-one transceiver according to claim 5, wherein: The equalizer circuit includes an attenuator, a first varactor diode, a second inductor, an eighth capacitor, a second varactor diode, a third inductor, a ninth capacitor, a third varactor diode, and a fourth inductor; The first input terminal of the attenuator is used to receive an intermediate frequency signal, the second input terminal of the attenuator is used to receive a first control voltage, the output terminal of the attenuator is connected to the cathode terminal of the first varactor diode, the cathode terminal of the first varactor diode is used to receive a second control voltage, the positive terminal of the first varactor diode is connected to the first terminal of the second inductor, the second terminal of the second inductor is grounded, the cathode terminal of the first varactor diode is connected to the first terminal of the eighth capacitor, the second terminal of the eighth capacitor is connected to the cathode terminal of the second varactor diode, the cathode terminal of the second varactor diode is used to receive a third control voltage, the positive terminal of the second varactor diode is connected to the first terminal of the third inductor, the second terminal of the third inductor is grounded, the cathode terminal of the second varactor diode is connected to the first terminal of the ninth capacitor, the second terminal of the ninth capacitor is connected to the cathode terminal of the third varactor diode, the cathode terminal of the third varactor diode is used to receive a fourth control voltage, the positive terminal of the third varactor diode is connected to the first terminal of the fourth inductor, the second terminal of the fourth inductor is grounded, and the cathode terminal of the third varactor diode is further used to output the intermediate frequency signal after gain compensation.

9. The all-in-one transceiver according to claim 1, wherein: It also includes a power supply module, the first input end and the second input end of the power supply module are respectively connected to the intermediate frequency receiving port and the intermediate frequency transmitting port, for receiving power from an external power supply, and the power supply module is used to supply power to the internal components of the transceiver.

10. A communication system, characterized in that: The communication system includes an indoor unit and an outdoor unit, the indoor unit includes a demodulation device, the outdoor unit includes a parabolic antenna and a transceiver as described in any one of claims 1 to 9, the first signal end of the demodulation device is connected to the intermediate frequency transmitting port of the transceiver, and is used to input a first intermediate frequency signal to the up-conversion module, and the second signal end of the demodulation device is connected to the intermediate frequency receiving port of the transceiver, and is used to receive the second intermediate frequency signal output by the down-conversion module, or to input a reception strength signal to the demodulation unit.

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