CN208433966U - A kind of millimeter wave transceiver of rail vehicle ground wireless communication ground base station - Google Patents

Abstract

The utility model belongs to millimetre-wave attenuator technical field, is related to a kind of millimeter wave transceiver of rail vehicle ground wireless communication ground base station.The ground millimeter wave transceiver of the utility model, signal bandwidth 1GHz, for rate up to Gbit/s vehicle the realization of high-speed communication system provide effective, reliable support.Using modularization, unitized design, functional module has been shared to greatest extent, has reduced the quantity and power consumption of equipment on bar, to reduce system Construction cost, facilitates design of system integration, test and commercialization；The millimeter wave module and microwave module being installed on bar are compact-sized by the way of perpendicular interconnection, and miniaturization reduces volume；It can be monitored in real time by system when work, support system calibration, fault pre-alarming and fault fast positioning, the signal power of transmitting terminal and the AGC of receiving end can be adjusted dynamically, it is more adaptable under Different climate, environmental condition, have certain engineering value, can be promoted to the solution of other rail transit field high-speed communications such as subway.

Description

A kind of millimeter wave transceiver of rail vehicle ground wireless communication ground base station

Technical field

The utility model belongs to millimetre-wave attenuator technical field, is related to a kind of rail vehicle ground wireless communication ground base station Millimeter wave transceiver.

Background technique

Millimeter wave has been compatible with microwave and light wave between microwave (3~30GHz) and submillimeter wave (being greater than 300GHz) Some features.In recent years, due to the plurality of advantages that millimeter wave has, communication, radar, guidance, in terms of all With important application.With the fast development of rail traffic (high-speed rail, subway), reliable, real-time, efficient width is provided for passenger Band wireless network access services, also proposed new requirement to Information-based Railway.On the one hand, the operation, security monitoring of train and The information such as plant maintenance need real-time transmission to control centre, meet the needs of road network real-time dynamic information transmission；On the other hand, People need through various communication apparatus, and the moment keeps the connection with network.Millimetre-wave attenuator has in identical relative bandwidth Lower absolute bandwidth is big, this means that higher transmission rate and bigger capacity；Higher frequency also implies that higher day Line gain, smaller size, anti-interference are more preferable.Millimeter wave transceiver is millimeter wave transmitting module and receiving module, local oscillator The millimeter wave microwave integrated circuit that module and microwave module etc. become one is the basis for constituting millimeter-wave communication system.

Domestic existing rail vehicle ground wireless communication system substantially GSM-R, WLAN and LTE is several；GSM-R is main Based on second generation global system for mobile communications GSM, mature and reliable, but the system itself is narrowband systems, and data carrying capabilities have Limit is only able to satisfy the scheduling of railway private radio and demand for control；WLAN technology complete, technology maturation, low cost with industrial chain The advantages that, but do not support the data of screamer to switch, and work in open frequency range 2.4GHz, vulnerable to such as personal heat The interference such as point, bluetooth；LTE uses the dedicated frequency range of 1.8GHz, and strong antijamming capability, maintainability performance is good, but does not support 100MHz The above bandwidth and low-power consumption, coverage distance 100m~1km, networking cost are higher.Existing several mainstream schemes, even if using high Contrast system or multiple access technology expand the capacity of communication system, improve the availability of frequency spectrum, it is also difficult to meet future communications development Demand.

Utility model content

The purpose of this utility model is, for high speed data transfer institute under the growing high-speed mobile condition of rail traffic The new demand of bring " double height " problem, and the millimeter-wave technology different from existing solution is used, the mesh of the utility model Be to provide a kind of ground base station millimeter wave transceiver based in rail transit field communication under millimetre-wave attenuator technical system, As the basis for realizing millimeter wave high-speed communication between vehicle ground, lower Information-based Railway is rapidly developed to adapt to rail traffic in recent years New Times ' Demand.

The technical solution of the utility model is:

Ground millimeter wave transceiver provides a kind of millimeter wave transceiving front end for being installed on Along Railway ground base station, is contacting Each a set of millimeter wave transceiving channel on the left and right directions of net bar.Using modular mentality of designing, electricity in module and module is considered Ground millimeter wave transceiver is divided into millimeter wave transceiving module, microwave module and ifd module three parts by the versatility on road；With Vehicle-mounted millimeter wave transceiver is completed to get on the bus along track the relay transmission of millimeter-wave signal between ground jointly, and can monitor and control The working condition of ground millimeter wave transceiver processed.

Millimeter wave transceiving module, including two sets of identical millimeter wave transceiving channels: millimeter wave transmitting circuit -1, millimeter wave connect Receive the millimeter wave transceiving channel -1 that circuit -1 forms and the millimeter wave that millimeter wave transmitting circuit -2, millimeter wave reception circuit -2 form Transceiver channel -2.Intermediate-freuqncy signal (the bandwidth that millimeter wave transmitting circuit -1 or millimeter wave transmitting circuit -2 input microwave module 1GHz) up-conversion and is sent into circulator after being amplified to required power to the millimeter wave frequency band of work, from ground-plane antenna to train vehicle Car antenna on top is launched.Meanwhile ground-plane antenna receives the millimeter-wave signal (bandwidth 1GHz) of car antenna transmitting, warp Enter millimeter wave after circulator and receive circuit -1 or millimeter wave reception circuit -2, downconverts to intermediate-freuqncy signal after signal is amplified, It exports to microwave module.Two sets of millimeter wave transceiving channel time-sharing works of millimeter wave transceiving module, i.e. synchronization only have millimeter The work of wave transceiver channel -1 or millimeter wave transceiving channel -2 work, and control milli by the system channel switching signal of microwave module input Channel selecting when metric wave transceiver module works.

Microwave module includes four microwave treatment module, local oscillator module, power module, signal processing module functional modules. Include transmission channel and receiving channel in microwave treatment module, to the intermediate frequency transmitting signal from ifd module and removes ifd module Received IF signal carry out temperature-compensating, amplification, filtering, the processing such as equilibrium, and by system channel switching signal control its with The channel selecting and switching connected between millimeter wave transceiving channel -1 or millimeter wave transceiving channel -2；Local oscillator module is millimeter wave receipts Send out the local oscillation signal needed for module provides；Power module by external input voltage be converted to millimeter wave transceiving module, microwave module, With voltage needed for local oscillator module and be respectively its power supply, and have the function of corresponding current detecting and power protection；Signal Processing module is acquired and transmits to the monitoring information of ground millimeter wave transceiver.

Ifd module is the part intermediate-frequency circuit that can be integrated with digital-to-analog circuits such as base band, modulation /demodulation, including transmission channel And receiving channel.It takes place frequently in transmission channel pair and penetrates the processing such as balanced signal progress, amplification, filtering；Receiving channel is to intermediate frequency simultaneously It receives signal to handle into automatic growth control, filtering, amplification etc., intermediate-freuqncy signal required for demodulator is provided.

The millimeter-wave signal interface of ground millimeter wave transceiver uses WR-28 standard waveguide, local oscillation signal and intermediate-freuqncy signal Interface uses coaxial connector, and power supply and control interface use feed-through capacitor.It is metallic shield in each modular structure Box improves the anti-interference ability and dust tightness of circuit；Convenient for the system integration.Millimeter wave transceiving module and microwave module and annular Device, antenna are placed in the antenna house on bar；Ifd module and external modem are integrated, the base band being placed in compartment In cabinet, and intermediate-freuqncy signal is connected by the way of Integrated Service Digital Network.

The beneficial effects of the utility model are the ground millimeter wave transceiver of the utility model, signal bandwidth 1GHz, for speed Rate up to Gbit/s vehicle the realization of high-speed communication system provide effective, reliable support.Using modularization, unitized Design, has shared functional module to greatest extent, has reduced the quantity and power consumption of equipment on bar, so that system Construction cost is reduced, Facilitate design of system integration, test and commercialization；The millimeter wave module and microwave module being installed on bar are using perpendicular interconnection Mode, compact-sized, miniaturization reduces volume；Can be monitored in real time by system when work, support system calibration, fault pre-alarming and Fault fast positioning, the signal power of transmitting terminal and the AGC of receiving end can be adjusted dynamically, under Different climate, environmental condition It is more adaptable, have certain engineering value, can be to the solution of other rail transit field high-speed communications such as subway It promotes.

Detailed description of the invention

Fig. 1 is ground millimeter wave transceiver logical construction schematic diagram；

Appended drawing reference: 1. millimeter wave transceiving modules, 2. microwave modules, 3. ifd modules, 101. millimeter wave transceiving channel -1, 102. millimeter wave transceiving channel -2；

Fig. 2 is the millimeter wave transceiving module schematic diagram of ground millimeter wave transceiver；

Appended drawing reference: 101. millimeter wave transceiving channel -1,102. millimeter wave transceiving channel -2,111. millimeter waves transmitting electricity Road -1,112. millimeter wave receives circuit -1,121. millimeter wave transmitting circuit -2,112. millimeter wave and receives circuit -2,21. local oscillator mould Block, 22. microwave treatment modules, 24. signal processing modules；

Fig. 3 is the millimeter wave transceiving module Standard schematic diagram of ground millimeter wave transceiver；

Appended drawing reference: 1. intermediate frequencies transmitting -1 (SMP interface) of input, 2. local oscillators input -1 (SMP interface), 3. local oscillators input -1 (SMP interface), 4. medium frequency receptions -1 (SMP interface) of output, 5. biasings/state -1 (M2.5 feed-through capacitor), 6. waveguide filters, 7. waveguide filter, 8. circulators, 9. intermediate frequencies transmitting -2 (SMP interfaces) of input, 10. local oscillators -2 (SMP interfaces) of input, 11. Vibration -2 (SMP interfaces) of input, 12. medium frequency receptions -2 (SMP interfaces) of output, 13. biasings/state -2 (M2.5 feed-through capacitor), 14. Waveguide filter, 15. waveguide filters, 16. circulators；

Fig. 4 is microwave module schematic diagram；

Appended drawing reference: 1. millimeter wave transceiving modules, 2. microwave modules, 3. ifd modules, 101. millimeter wave transceiving channel -1, 102. millimeter wave transceiving channel -2,111. millimeter wave transmitting circuit -1,112. millimeter wave receives the transmitting of circuit -1,121. millimeter wave Circuit -2,112. millimeter wave receives circuit -2,21. local oscillator module, 22. microwave treatment modules, 23. power modules, at 24. signals Module is managed, 211. temperature-compensatings, 212. amplifications, 213. high-pass filterings, 214. is balanced, and 215. filtering, 216. amplifications, 217. Weighing apparatus, 218. temperature-compensatings, 219. low-pass filtering, 221. crystal oscillators, 222.PLL, 223.2 frequencys multiplication, 224. filtering, 225. couplings, 226. couplings, 231. power protections and observation circuit, 232.DC/DC circuit；

Fig. 5 is the microwave module Standard schematic diagram of ground millimeter wave transceiver；

Appended drawing reference: 51. microwave modules biasing with data (M2.5 feed-through capacitor), 52. millimeter wave transceiving modules biasing with State (M2.5 feed-through capacitor), 53. medium frequency receptions input (SMP interface), and 54.18.9/20.1GHz local oscillator exports (SMP interface), 55.18.9/20.1GHz local oscillator output (SMP interface), 56. intermediate frequencies transmitting output (SMP interface), 57. intermediate frequencies transmitting output (SMP Interface), 58.18.9/20.1GHz local oscillator exports (SMP interface), and 59.18.9/20.1GHz local oscillator exports (SMP interface), and 510. Medium frequency reception inputs (SMP interface), the biasing of 511. millimeter wave transceiving modules and state (M2.5 feed-through capacitor), the input of 512. intermediate frequencies It exports Integrated Service Digital Network (SMP interface)；

Fig. 6 is ifd module schematic diagram；

Appended drawing reference: 21. microwave treatment modules, 31. transmission channels, 32. receiving channels, 311. is balanced, and 312. numerical controls decline Subtract, 313. amplifications, 314. high-pass filterings, 315. temperature-compensatings decaying, 321. temperature-compensatings decaying, 322. filtering, 323. amplifications, 324. low-pass filtering, 325. couplings, 326. detections, 327.AGC, 328. is balanced, 329. amplifications；

Fig. 7 is the structural assembly diagram of the millimeter wave transceiver on bar in antenna house.

Specific embodiment

The utility model is described further with reference to the accompanying drawing.

As shown in Figure 1, the ground millimeter wave transceiver of the utility model, using modular mentality of designing, by millimeter wave Transceiver module (including millimeter wave transceiving channel -1, millimeter wave transceiving channel -2), microwave module and ifd module composition.Millimeter wave Local oscillation signal needed for two sets of millimeter wave transceiving channel and medium-frequency receiving and sending signal are identical in transceiver module, can be in microwave module It shares；Ifd module is identical as vehicle-mounted millimeter wave transceiver, can directly continue to use.Millimeter wave transceiving module, microwave module are same External two ground-plane antennas, two circulators are installed on jointly in the antenna house on contact net bar, ifd module be installed on In base band cabinet under bar.

Millimeter wave transceiving module, including two sets of identical millimeter wave transceiving channels: millimeter wave transmitting circuit -1, millimeter wave connect Receive the millimeter wave transceiving channel -1 that circuit -1 forms and the millimeter wave that millimeter wave transmitting circuit -2, millimeter wave reception circuit -2 form Transceiver channel -2, schematic diagram is as shown in Figure 2.What millimeter wave transmitting circuit -1 or millimeter wave transmitting circuit -2 inputted microwave module The millimeter wave frequency band of intermediate-freuqncy signal (bandwidth 1GHz) up-conversion extremely work, and it is sent into circulator after being amplified to required power, by ground Car antenna of the surface antenna in roof of train is launched.Meanwhile ground-plane antenna receives the millimeter wave letter of car antenna transmitting Number (bandwidth 1GHz), enters that millimeter wave receives circuit -1 or millimeter wave receives circuit -2 after circulator, after signal is amplified under It is converted to intermediate-freuqncy signal, output to microwave module.Two sets of millimeter wave transceiving channel time-sharing works of millimeter wave transceiving module, i.e., together One moment only had the work of millimeter wave transceiving channel -1 or millimeter wave transceiving channel -2 works, the system channel inputted by microwave module Switching signal controls channel selecting when millimeter wave transceiving module work.

The input signal of millimeter -2 pairs of local oscillator modules of wave transmitting circuit -1 or millimeter wave transmitting circuit amplifies and frequency multiplication Afterwards as the local oscillation signal of millimeter wave mixer, amplifier is the chip of ADI, and working frequency is 13~25GHz, and gain is 20dB；Frequency multiplier is the chip of ADI, 32~46GHz of reference frequency output, output power 13dBm.It is inputted later with microwave module Intermediate-freuqncy signal be mixed, generate required millimeter-wave signal；Chip of the frequency mixer for ADI, 25~40GHz of working frequency range, Input 1dB compression point is 11dBm, conversion loss 9.5dB.The processing such as finally it is filtered, amplifies to millimeter-wave signal, it will milli Metric wave signal is amplified to required power.Amplifier chain is by the way of three-level amplification: the small signal of first order amplifier processing considers To the versatility of circuit, using low-noise amplifier identical with millimeter wave reception circuit, which is the chip of Ommic, Working range is 25~43GHz, and noise coefficient is less than 1.8dB, gain 25dB；Second level amplifier drives rear class power amplifier work Make, which is the chip of Avago, and the 1dB compression point of working range 20-45GHz, output power are 21dBm, and gain is 25dB,；Third stage power amplifier, the amplifier are the chip of Qorvo, working frequency range 33-47GHz, gain 25dB, output work The 1dB compression point of rate is 26dBm；The mm wave RF signal of power amplifier output is filtered through probe transitions and waveguide cavity diaphragm Device is sent into circulator.

Meanwhile ground-plane antenna receives the millimeter-wave signal (bandwidth 1GHz) of car antenna transmitting, and milli is entered after circulator Metric wave receives circuit -1 or millimeter wave receives circuit -2.Through waveguide filter and probe transitions, improve in millimeter wave transceiving module Transceiver insulation extracts millimeter-wave signal and forms matched well with circuit；It subsequently enters low-noise amplifier and improves millimeter wave letter Number reception power, the amplifier in millimeter wave transmitting circuit amplify the link first order it is identical.Millimeter wave mixer is using humorous The mode of wave mixing, to reduce the power consumption, volume and cost of circuit.Local oscillator module input signal filtering after with millimeter-wave signal Into frequency mixer, which is the chip of ADI, and the isolation of output signal and local oscillation signal is greater than 37dB, and conversion loss is Millimeter-wave signal is down-converted to received IF signal by 10dB.

It is metal shielding box outside millimeter wave transceiving module, structure is as shown in figure 3, left side is millimeter wave transceiving channel- 1, right side be two sets millimeter wave transceiving channel -2, each millimeter wave transceiving channel two local oscillators input, intermediate frequency transmitting input and The interface of medium frequency reception output is all made of SMP, and the SMP interface with symmetric position at left and right sides of shared microwave module is to slotting phase Even；Millimeter wave transmitting circuit connect the waveguide filter of the left and right sides with millimeter wave reception circuit by WR-28 standard waveguide, and It is connected to circulator, overall structure is more small-sized, compact, maximally utilizes the volume of bar upper ground surface base station enclosure, is convenient for and ground Surface antenna is integrated.The biasing of millimeter wave transceiving module/state input uses M2.5 feed-through capacitor, and it is logical to be biased to millimeter wave transceiving Direct current biasing needed for road -1 or millimeter wave transceiving channel -2 provide work, state are switched by the system channel that microwave module is sent Signal controls channel selecting when millimeter wave transceiving module work, and millimeter wave transceiving channel -1 works when high level, when low level It is switched to the work of millimeter wave transceiving channel -2.

Microwave module can share for two sets of millimeter wave transceiving channels, to reduce the quantity of equipment, volume and power consumption on bar.Iron There are several ground stations on curb line, the microwave module on each website utmostly shares, and lessens system Construction Cost.As shown in figure 4, microwave module is by four microwave treatment module, local oscillator module, power module, signal processing module functions Module composition realizes the processing to the intermediate frequency transmitting/receiving signal of ifd module input/output, transmission；For millimeter wave transceiving mould Block provides local oscillation signal；Biasing is provided for each module of ground millimeter wave transceiver on bar；And to millimeter wave transceiver in bar On each module working state monitoring and control etc. functions.

Microwave treatment module, including transmission channel and receiving channel, intermediate frequency transmitting signal carry out first in transmission channel Temperature-compensating, amplification, amplifier are the chip of Mini-Circuits, operating frequency range 0.5-5GHz, noise coefficient 1.4dB, gain 21dB；After through high-pass filtering, and to it carry out equilibrium treatment to improve inband flatness, finally enter SPDT controls it by system channel switching signal and removes millimeter wave transmitting circuit -1 or millimeter wave transmitting circuit -2；Meanwhile system It is logical from millimeter wave reception circuit -1 or millimeter wave reception circuit -2 into receiving that channel switching signal controls received IF signal Road is filtered in receiving channel, is amplified, and amplifier uses the chip of Mini-Circuits identical with transmission channel, amplification Post-equalization is to improve inband flatness, temperature compensated rear low-pass filtering output.It is micro- when system channel switching signal is high level Wave processing module accesses millimeter wave transceiving channel -1 and works；Otherwise when being low level, it is switched to access millimeter wave transceiving channel -2 Work, to realize the channel selecting handoff functionality of system；The input of transmission channel and the output of receiving channel are using function point Mode shares a radiofrequency signal interface to reduce volume, and shared radiofrequency signal interface uses SMP.

Local oscillator module provides four road local oscillation signals for millimeter wave transceiving module, and two-way transmitting local oscillation signal goes millimeter wave to emit Circuit -1 and millimeter wave transmitting circuit -2, two-way receive local oscillation signal and millimeter wave are gone to receive circuit -1 and millimeter wave reception circuit - 2.By crystal oscillator give phaselocked loop provide reference signal, phaselocked loop use STMicw Electronics chip, working range 3.85-16GHz, Highest phase demodulation frequency is 100MHz, has the function of fractional frequency division and integral frequency divisioil.After phase-locked loop locking, output 9.45/ The microwave signal of 10.05GHz is multiplied to 18.9/20.1GHz through varactor doubler, and varactor doubler uses the chip of ADI, output Frequency range 13-24.6GHz, output power 17dBm；It is extracted through bandpass filter, then divides two-way to export signal through power splitter, Transmitting local oscillator needed for every road output signal couples output every set millimeter wave transceiving channel finally by coupler and reception local oscillator Two paths of signals.In addition, the function that local oscillator module has the output frequency for providing the instruction of local oscillator locking information and crystal oscillator tunable Can, the realization of the functions such as calibration, fault pre-alarming and fault fast positioning when system being supported to run.

Power module includes power protection and observation circuit, DC/DC circuit two parts.Power protecting circuit is in power module Input terminal, after external input voltage 12V passes through, anti-lightning strike, anti-can power on surge current, anti-overflow and reversal connection, monitoring electricity The total working current indicating signal of each module of ground millimeter wave transceiver on bar is sent to signal processing module by road, is system Run time fault early warning, monitoring and fault fast positioning provide intuitive foundation.The voltage of 12V is converted to milli by DC/DC circuit Voltage+6V ,+5.2V ,+5V and -5V needed for metric wave transceiver module, microwave module and local oscillator module, respectively it is powered, and has There is the function of power protection.

Signal processing module receives the temperature detection signal in two millimeter wave transceiving channels, local oscillator in millimeter wave transceiving module The lock indication signal of module and the total working current indicating signal of power module, the working condition of each module on monitoring rod；To Local oscillator module send crystal oscillator frequency tuning and to microwave treatment module send system channel switching signal, the calibration of control system and Switching.Using the chip of ADI, which supports I2C agreement, is integrated with 4 road ADC and 4 road DAC, realizes the ground millimeter on bar Under each module of wave transceiver and bar between the host of base band cabinet monitoring information data acquisition and transmission.

It is metal shielding box outside microwave module, inside is divided into upper and lower cavities shielding box, wherein transmission channel, receiving channel It is in the same face with local oscillator module, signal processing module and power module are integrated on the PCB of another side cavity, Standard Scheme as shown in figure 5, the interface of medium frequency reception input, two local oscillators inputs and intermediate frequency transmitting output is all made of SMP, positioned at microwave mode The medianly zygomorphic position of block；With the metal shielding box in millimeter wave transceiving channel -1 and millimeter wave transceiving channel -2 to slotting phase Even, the Integrated Service Digital Network interface that the input of transmission channel and the output of receiving channel share uses SMP；Microwave module biasing is handed over data M2.5 feed-through capacitor is mutually used, each module work shape of millimeter wave transceiver on 12V external power supply voltage input and roof is provided Data input and output are monitored and controlled in state；Two millimeter wave transceiving module biasings use M2.5 feed-through capacitor, millimeter wave with state Transceiver channel -1 and millimeter wave transceiving channel -2 provide the control signal of biasing and channel switching.

Ifd module is the part intermediate-frequency circuit that can be integrated with digital-to-analog circuits such as base band, modulation /demodulation, including transmission channel And receiving channel, schematic diagram are as shown in Figure 6.One radio frequency is shared to the intermediate frequency transmitting/receiving signal of microwave module input/output Signal SMA interface, the signaling interface to external digital-to-analog circuit are that intermediate frequency inputs and intermediate frequency exports two independent SMA interfaces, point It is not connected with transmission channel and receiving channel.Power supply signal and monitoring signal are accessed from DB9 interface, it can be achieved that emitting signal function The functions such as rate control, received signal strength monitoring, AGC dynamic adjustment.

Transmission channel first to externally input intermediate frequency transmitting signal do it is balanced improve inband flatness, after through numerical control attenuation Device controls its power by transmission power control signal, promotes environment adaptive capacity, and numerical-control attenuator is the core of ADI Piece, insertion loss 1.7dB, it is possible to provide the attenuation of maximum 31dB.Again through amplification and high-pass filtering, and decayed by temperature-compensating Device improves the influence of gain inconsistency under high/low temperature condition, most exports afterwards through circulator.Amplifier use in microwave module The chip of identical Mini-Circuits.

The received IF signal inputted from microwave module enters receiving channel after circulator, passes through temperature compensation attenuator Improve high/low temperature condition under gain inconsistency influence, and it is filtered, amplify after extracted by low-pass filter Received IF signal, and two paths of signals is exported by coupler: signal demodulator exports all the way, provides received signal strength to system Monitoring signals；Another way signal increases the dynamic range of receives link by way of AGC loop, and detection input terminal can receive The AGC of system controls signal, carries out dynamic adjustment to AGC, the signal of output end passes through balanced, amplification, last externally output Received IF signal needed for back-end circuit.Amplifier is using the chip with Mini-Circuits identical in microwave module.

Millimeter wave transceiving module and microwave module and circulator, antenna are placed in the antenna house of bar upper ground surface base station, Total power consumption is no more than 14W, as shown in Figure 7；Ifd module is installed in the base band cabinet under bar, in each modular structure For metal shielding box, the anti-interference ability and dust tightness of circuit are improved, is convenient for the system integration.

Claims (4)

1. a kind of millimeter wave transceiver of rail vehicle ground wireless communication ground base station, which is characterized in that the millimeter wave is received Hair machine includes millimeter wave transceiving module, microwave module and ifd module, in which:

The millimeter wave transceiving module, including receive that circuit forms by first millimeter of wave transmitting circuit and the first millimeter wave first Millimeter wave transceiving channel is led to by the second millimeter wave transceiving that second millimeter of wave transmitting circuit and the second millimeter wave reception circuit form Road；The intermediate-freuqncy signal up-conversion that first millimeter of wave transmitting circuit or second millimeter of wave transmitting circuit are used to input microwave module is extremely The millimeter wave frequency band of work, and it is sent into circulator after being amplified to required power, from vehicle-mounted day of the ground-plane antenna in roof of train Line is launched；Meanwhile ground-plane antenna receives the millimeter-wave signal of car antenna transmitting, and the first millimeter wave is entered after circulator It receives circuit or the second millimeter wave receives circuit, intermediate-freuqncy signal, output to microwave module are downconverted to after signal is amplified；Millimeter Two sets of millimeter wave transceiving channel time-sharing works of wave transceiver module, i.e. synchronization only have the first millimeter wave transceiving channels operation or Second millimeter wave transceiving channels operation；

The microwave module includes microwave treatment module, local oscillator module, power module and signal processing module；The microwave treatment Module includes transmission channel and receiving channel, is respectively used to the intermediate frequency transmitting signal from ifd module and removes ifd module Received IF signal carries out temperature-compensating, amplification, filtering and equilibrium treatment；The local oscillator module is used to be millimeter wave transceiving module Local oscillation signal needed for providing；The power module is used to external input voltage being converted to millimeter wave transceiving module, microwave mode Voltage needed for block and local oscillator module and respectively its power supply；The signal processing module is for the monitoring to millimeter wave transceiver Information is acquired and transmits, and the monitoring information is to measure the physical index information of each module working condition；

The ifd module is part intermediate-frequency circuit that can be integrated with base band, modem, including intermediate frequency transmission channel is in Frequency receiving channel；The intermediate frequency transmission channel penetrates balanced signal progress, amplification and filtering processing for taking place frequently in；Intermediate frequency simultaneously Receiving channel, into automatic growth control, filtering and enhanced processing, provides the letter of intermediate frequency required for demodulator to received IF signal Number.

2. a kind of millimeter wave transceiver of rail vehicle ground wireless communication ground base station according to claim 1, special Sign is that the millimeter wave transceiver is assemblied in the millimeter wave transceiving front end of ground base station along track, on a left side for contact net bar Each a set of millimeter wave transceiving channel in right direction.

3. a kind of millimeter wave transceiver of rail vehicle ground wireless communication ground base station according to claim 1 or 2, It is characterized in that, the total working electric current of temperature information and power module that the monitoring information includes at least millimeter wave transceiving module refers to Show information.

4. a kind of millimeter wave transceiver of rail vehicle ground wireless communication ground base station according to claim 3, special Sign is that the millimeter-wave signal interface of the millimeter wave transceiver uses WR-28 standard waveguide, and local oscillation signal and intermediate-freuqncy signal connect Mouth uses coaxial connector.