Frequency conversion module

Abstract

The utility model relates to the technical field of radio frequency equipment, in particular to a frequency conversion module, which comprises a duplexer, a first local oscillator and a second local oscillator. A 1.2 GHz intermediate frequency signal is output through a duplexer, a first local oscillator signal and a second local oscillator signal required by a frequency conversion channel are generated by an internal phase-locked loop, a clock signal respectively outputs two paths of signals to the first local oscillator signal and the second local oscillator signal through the duplexer, and the main purpose of the frequency conversion module is to realize up-conversion from one path of 1.2 GHz signal to a K frequency band (19.6 G-25GHz). The frequency conversion module is used for performing down-conversion on one path of K-band (19.6-25GHz) to 1.2 GHz signals, and a 100MHz clock combined by 1.2 G ports is used as a local oscillator reference in the module; the integration degree is high, the response speed is fast, and the stepping resolution is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to radio frequency equipment technical field especially relates to a frequency conversion module. BACKGROUND

[0002] The frequency conversion module that the market exists generally is big in size, and frequency range and functional index are not suitable, need to develop a small size according to technical index requirement, can realize the frequency conversion of one way 1.2GHz signal to K frequency band (19.6G~25GHz), and the frequency conversion of one way K frequency band (19.6G~25GHz) to 1.2GHz signal. UTILIT Y MODEL CONTENT

[0003] The utility model discloses a kind of frequency conversion modules, the main purpose of the frequency conversion module is to realize the frequency conversion of one way 1.2GHz signal to K frequency band (19.6G~25GHz), and the frequency conversion of one way K frequency band (19.6G~25GHz) to 1.2GHz signal, and 100MHz clock of 1.2G port combination is as the local oscillator reference in module internal;High degree of integration, response speed is fast, and step resolution is high.

[0004] To achieve the above object, the utility model provides a kind of frequency conversion module, including antenna, switch, amplifier, STC module, high pass filter and low pass filter, the antenna is ANT antenna for receiving and sending signal, one end of the switch is connected with the antenna, one end of the amplifier is connected with the switch, the STC module is connected with the amplifier, the high pass filter is connected with the STC module, the low pass filter is connected with the high pass filter.

[0005] Wherein, the frequency conversion module further includes first mixer, band pass filter, second mixer, BFCN-152W-75 filter and third mixer, the first mixer is connected with the high pass filter and the low pass filter, the band pass filter is connected with the first mixer, the second mixer is connected with the band pass filter, the BFCN-152W-75 filter is connected with the second mixer, the third mixer is connected with the BFCN-152W-75 filter.

[0006] Wherein, the frequency conversion module further includes a local oscillator and two local oscillators, the local oscillator is connected with the first mixer, the two local oscillators are connected with the second mixer.

[0007] The variable frequency module further comprises a clock source, a duplexer, an intermediate frequency signal input port and an attenuator, the clock source is connected with the first local oscillator and the second local oscillator in parallel, the duplexer is connected with the clock source, the intermediate frequency signal input port is connected with the duplexer, and the attenuator is connected with the intermediate frequency signal input port.

[0008] The variable frequency module further comprises a fourth mixer, a fifth mixer, a sixth mixer and a seventh mixer, the fourth mixer is connected with the attenuator, the fifth mixer is connected with the fourth mixer, the sixth mixer is connected with the fifth mixer, one end of the seventh mixer is connected with the sixth mixer, and the other end of the seventh mixer is connected with the third mixer.

[0009] The variable frequency module comprises a K-band bidirectional transceiving secondary frequency conversion channel, a first local oscillator signal, a second local oscillator signal and a clock signal, the two local oscillator signals provide the local oscillator for the secondary frequency conversion module, and the clock signal provides a clock reference signal for the two local oscillator signals, the main purpose of the variable frequency module is to realize up-conversion of a 1.2GHz signal to a K-band (19.6G-25GHz) and down-conversion of a K-band (19.6G-25GHz) signal to a 1.2GHz signal, and 100MHz clock of the 1.2G port is used as the local oscillator reference in the module, the degree of integration is high, the response speed is fast, and the step resolution is high. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced.

[0011] Figure 1 is a theoretical block diagram of the variable frequency module of the first embodiment of the utility model.

[0012] Figure 2 is a down-conversion channel diagram of the variable frequency module of the first embodiment of the utility model.

[0013] Figure 3 is an up-conversion channel diagram of the variable frequency module of the first embodiment of the utility model.

[0014] Figure 4 is a detailed implementation block diagram of the clock local oscillator circuit of the variable frequency module of the first embodiment of the utility model.

[0015] Figure 5 is a FPGA circuit design diagram of the variable frequency module of the first embodiment of the utility model.

[0016] Figure 6 is a power supply implementation block diagram of the variable frequency module of the first embodiment of the utility model.

[0017] In the figure: 1-antenna, 2-switch, 3-amplifier, 4-STC module, 5-high pass filter, 6-low pass filter, 7-first mixer, 8-band pass filter, 9-second mixer, 10-BFCN-152W-75 filter, 11-third mixer, 12-one local oscillator, 13-two local oscillator, 14-clock source, 15-duplexer, 16-intermediate frequency signal input port, 17-attenuator, 18-fourth mixer, 19-fifth mixer, 20-sixth mixer, 21-seventh mixer DETAILED DESCRIPTION

[0018] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, the embodiments described below are exemplary, and are intended to explain the utility model, and cannot be understood as the limitation of the utility model.

[0019] The first embodiment of the application is:

[0020] Please refer to Figures 1 to 6 , wherein, Figure 1 is the theoretical diagram of the frequency conversion module of the first embodiment of the utility model, Figure 2 is the down-conversion channel diagram of the frequency conversion module of the first embodiment of the utility model, Figure 3 is the up-conversion channel diagram of the frequency conversion module of the first embodiment of the utility model, Figure 4 is the detailed implementation block diagram of the clock local oscillator circuit of the frequency conversion module of the first embodiment of the utility model, Figure 5 is the FPGA circuit design diagram of the frequency conversion module of the first embodiment of the utility model, Figure 6 is the power implementation block diagram of the frequency conversion module of the first embodiment of the utility model, the utility model provides a kind of frequency conversion module, including antenna 1, switch 2, amplifier 3, STC module 4, high pass filter 5, low pass filter 6, first mixer 7, band pass filter 8, second mixer 9, BFCN-152W-75 filter 10, third mixer 11, one local oscillator 12, two local oscillator 13, clock source 14, duplexer 15, intermediate frequency signal input interface 16, attenuator 17, fourth mixer 18, fifth mixer 19, sixth mixer 20 and seventh mixer 21;The main purpose of the frequency conversion module of the foregoing scheme is to realize the up-conversion of one way 1.2GHz signal to K frequency band (19.6G~25GHz), and the down-conversion of one way K frequency band (19.6G~25GHz) to 1.2GHz signal frequency conversion module, and 1.2G port combined 100MHz clock as the local oscillator reference inside module;High degree of integration, fast response speed, high step resolution.

[0021] For this specific embodiment, the 1.2GHz intermediate frequency signal is output through the duplexer 15, and the required one local oscillator 12 and two local oscillator 13 signals of the frequency conversion channel are generated by the internal phase-locked loop, and the clock signal is output through the duplexer 15 to the one local oscillator 12 and the two local oscillator 13.

[0022] The power supply required by the frequency conversion module is generated by a +5.5V power supply, and all power supplies required by the local oscillator, the frequency conversion channel, and the control circuit are realized through internal LDO voltage stabilizers and DC-DC power converters. The external 422 differential signal and PECL signal are transmitted to the FPGA for analysis and instruction sending through the interface conversion chip.

[0023] The received signal of the frequency conversion module 19.6GHz-25GHz is transmitted through the transceiver switching switch and the segmented filter, and the received signal is mixed with the 15.1GHz-20.5GHz one local oscillator 12 signal to generate a 4.5GHz intermediate frequency signal. The one intermediate frequency signal is mixed with the 3.3GHz two local oscillator 13 signal to generate a 1.2GHz two intermediate frequency signal. The two intermediate frequency signals are output to the intermediate frequency port through the narrowband filter amplification circuit and the duplexer 15.

[0024] The 1.2GHz transmit two intermediate frequency signal of the frequency conversion module is transmitted through the duplexer 15 and the intermediate frequency filter amplification circuit, and the 1.2GHz two intermediate frequency signal is mixed with the 3.3GHz two local oscillator 13 signal through the two mixers to generate a 4.5GHz one intermediate frequency signal. The one intermediate frequency signal is mixed with the 15.1-20.5GHz one local oscillator 12 signal to generate a 19.6-25GHz transmit signal. The transmit signal is output to the antenna 1 port through the segmented filter amplification circuit.

[0025] The clock local oscillator circuit is an external port that inputs a 100MHz clock signal through the duplexer 15. The clock signal is divided into two parts and output to the clock port of the one local oscillator 12 and the two local oscillator 13. The one local oscillator 12 outputs a 15.1-20.5GHz local oscillator signal through SPI timing configuration, and the two local oscillator 13 outputs a 3.3GHz local oscillator signal through SPI timing configuration.

[0026] The FPGA is externally connected to the RS422 interface chip, which is used for frequency code, switch control, BIT information transmission, etc. After the FPGA analyzes the 422 data, it completes the local oscillator frequency configuration of the PLL chip, the selection of the transmit / receive channel, the STC control, the filter group control, etc. The FPGA is externally connected to the voltage and temperature detection circuit, which reads the parameters in real time and reports them. The JTAG bus of the FPGA is led out through the connector module, which is used as the debugging interface of the FPGA.

[0027] The external interface of the frequency conversion module provides a +5.5V voltage. According to the implementation scheme of the local oscillator circuit and the digital circuit of the frequency conversion module, the voltage required by each part is provided through the Figure 6The power supply of each part of the circuit is converted into the voltage required by the part of the circuit, and is filtered to provide the subsequent circuit, which can effectively prevent the signal from being transmitted on the power line to generate interference; the filter capacitor is added near the power supply of each component, which further improves the electromagnetic compatibility; the voltage required by each part of the circuit is realized by adding an LDO voltage regulator, which can increase the isolation degree between channels, and the external input power supply is filtered to provide the subsequent circuit; it can effectively prevent the signal from being transmitted on the power line to generate interference; the EMI filter capacitor is added near the power supply of each component, which further improves the electromagnetic compatibility; the maximum output ripple voltage of the selected converter output is less than or equal to the index requirement, in order to ensure that the output voltage ripple meets the design requirements under low temperature, high temperature, normal temperature and other conditions, an independent EMI filter circuit is added at each output end to further reduce the ripple voltage of each group of DC output, at the same time, a ceramic capacitor is connected in parallel at the output end of each group of DC output voltage to further reduce the series equivalent resistance of the capacitor, thereby suppressing the output ripple voltage of each group of DC output voltage.

[0028] The frequency conversion module of the embodiment comprises one K-band bidirectional transceiving secondary frequency conversion channel, one local oscillator 12 signal, one local oscillator 13 signal, and one clock signal. The two local oscillator signals provide a local oscillator for the secondary frequency conversion module, and the clock signal provides a clock reference signal for the two local oscillators. The main purpose of the frequency conversion module is to realize the up-conversion of one 1.2GHz signal to a K-band (19.6G-25GHz) and the down-conversion of one K-band (19.6G-25GHz) to a 1.2GHz signal, and to use the 100MHz clock of the 1.2G port as the local oscillator reference inside the module. The frequency conversion module has high integration degree, fast response speed, and high step resolution.

[0029] The above only discloses one or more preferred embodiments of the application, and cannot limit the scope of the application. Those skilled in the art can understand that the implementation of all or part of the above embodiments is still within the scope of the application.

Claims

1. A frequency conversion module, characterized in that, comprising an antenna, a switch, an amplifier, an STC module, a high-pass filter and a low-pass filter, the antenna is an ANT antenna for receiving and transmitting signals, one end of the switch is connected with the antenna, one end of the amplifier is connected with the switch, the STC module is connected with the amplifier, the high-pass filter is connected with the STC module, and the low-pass filter is connected with the high-pass filter in parallel.

2. The frequency conversion module of claim 1, characterized in that, the frequency conversion module further comprises a first mixer, a band-pass filter, a second mixer, a BFCN-152W-75 filter and a third mixer, the first mixer is connected with the high-pass filter and the low-pass filter, the band-pass filter is connected with the first mixer, the second mixer is connected with the band-pass filter, the BFCN-152W-75 filter is connected with the second mixer, and the third mixer is connected with the BFCN-152W-75 filter.

3. The frequency conversion module of claim 2, characterized in that, the frequency conversion module further comprises a first local oscillator and a second local oscillator, the first local oscillator is connected with the first mixer, and the second local oscillator is connected with the second mixer.

4. The frequency conversion module of claim 3, characterized in that, the frequency conversion module further comprises a clock source, a duplexer, an intermediate frequency signal input port and an attenuator, the clock source is connected with the first local oscillator and the second local oscillator in parallel, the duplexer is connected with the clock source, the intermediate frequency signal input port is connected with the duplexer, and the attenuator is connected with the intermediate frequency signal input port.

5. The frequency conversion module of claim 4, characterized in that, the frequency conversion module further comprises a fourth mixer, a fifth mixer, a sixth mixer and a seventh mixer, the fourth mixer is connected with the attenuator, the fifth mixer is connected with the fourth mixer, the sixth mixer is connected with the fifth mixer, one end of the seventh mixer is connected with the sixth mixer, and the other end is connected with the third mixer.

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