CN215268284U

CN215268284U - Digital TR module

Info

Publication number: CN215268284U
Application number: CN202121687004.3U
Authority: CN
Inventors: 燕标; 杨兴华; 潘亮
Original assignee: Chengdu Tiger Microwave Technology Co Ltd
Current assignee: Chengdu Tiger Microwave Technology Co Ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2021-12-21
Anticipated expiration: 2031-07-23

Abstract

The utility model discloses a digital TR module, which comprises a digital signal processor, an optical module, an optical fiber port, a plurality of radio frequency receiving and transmitting channels, a first local oscillator distribution network, a first local oscillator input port, a second local oscillator distribution network and a second local oscillator input port; the digital signal processor is respectively connected with each radio frequency transceiving channel, and is also connected with an optical fiber port through an optical module, and the optical fiber port is used for connecting an external optical fiber. The utility model integrates the optical module and the RS485 communication module, has rich interface resources, can transmit data with remote equipment through optical fibers, and transmits data with near field equipment through the RS485 communication module; and the ports are integrated and calibrated in each channel, so that consistency calibration among the channels is facilitated.

Description

Digital TR module

Technical Field

The utility model relates to the field of communications, especially, relate to a digital TR module.

Background

In the field of communications, phased array antennas have become more and more widely used. As a core component TR of a phased array antenna, there is also an increasingly important application in communication equipment;

the existing TR module receives and transmits signals with the frequency from hundreds of MHz to dozens of GHz, is limited by the existing analog-to-digital conversion (ADC) device, and cannot directly perform digital processing at the rear end of an antenna, and a commonly adopted method is to adopt a superheterodyne receiver to down-convert radio-frequency signals from the antenna to intermediate frequency and then perform processing; in the process of superheterodyne processing, however, amplitude and phase characteristics among different channels are not completely consistent; this brings about a lot of inconvenience to the operation of the TR module; meanwhile, interface resources of the existing TR module are not abundant, and there are many inconveniences in signal transmission with the outside.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, and provides a digital TR module which integrates an optical module and an RS485 communication module, has abundant interface resources, can perform data transmission with remote equipment through optical fibers, and performs data transmission with near field equipment through the RS485 communication module; and the ports are integrated and calibrated in each channel, so that consistency calibration among the channels is facilitated.

The purpose of the utility model is realized through the following technical scheme: a digital TR module, characterized by: the system comprises a digital signal processor, an optical module, an optical fiber port, a plurality of radio frequency transceiving channels, a first local oscillator distribution network, a first local oscillator input port, a second local oscillator distribution network and a second local oscillator input port;

the digital signal processor is respectively connected with each radio frequency transceiving channel, and is also connected with an optical fiber port through an optical module, and the optical fiber port is used for connecting an external optical fiber;

the input end of the first local oscillator distribution network is connected with the first local oscillator input port and used for receiving local oscillator signals from the first local oscillator input port, and the output end of the first local oscillator network distribution module is respectively connected with each radio frequency transceiving channel; the input end of the second local oscillator distribution network is connected with the second local oscillator input port and used for receiving local oscillator signals from the second local oscillator input port, and the output end of the second local oscillator distribution network is connected with each radio frequency transceiving channel respectively.

Preferably, the digital TR module further comprises an RS485 communication module, and the RS485 communication module is connected with the digital signal processor. The digital TR module further comprises a debugging port, and the debugging port is connected with the digital signal processor.

Preferably, each path of the radio frequency transceiving channel comprises a radio frequency unit, a frequency conversion processing unit and a data conversion unit;

the radio frequency unit comprises a radio frequency port, a calibration port, a coupler, a first filter, a circulator, a limiter, a low noise amplifier, a first power amplifier, a second power amplifier and a first single-pole double-throw switch; one end of the first filter is connected with the radio frequency port through a coupler, and the other end of the first filter is connected with the circulator; the input end of the amplitude limiter is connected with the circulator, and the output end of the amplitude limiter is connected with the frequency conversion processing unit sequentially through the low noise amplifier and the first single-pole double-throw switch; the input end of the first power amplifier is connected with the frequency conversion processing unit through a first single-pole double-throw switch, and the output end of the first power amplifier is connected with the circulator through a second power amplifier; the calibration port is connected with the coupling end of the coupler;

the frequency conversion processing unit comprises a second filter, a first mixer, a third filter, a first operational amplifier, a second operational amplifier, a fourth filter, a second mixer and a fifth filter; one end of the second filter is connected with the radio frequency unit, and the other end of the second filter is connected with the third filter through the first mixer; the input end of the first operational amplifier is connected with the third filter, and the output end of the first operational amplifier is connected with the fourth filter; the input end of the second operational amplifier is connected with the fourth filter, and the output end of the second operational amplifier is connected with the third filter; the fourth filter is connected with the data conversion unit through the second frequency mixer and the fifth filter in sequence;

the data conversion unit comprises a second single-pole double-throw switch, an AGC amplifier, a sixth filter, an ADC module, a DAC module and a third operational amplifier; the input end of the AGC amplifier is connected with the frequency conversion processing unit through a second single-pole double-throw switch, the output end of the AGC amplifier is connected with the ADC module through a sixth filter, and the ADC module performs analog-to-digital conversion on the received signals to obtain baseband digital signals which are transmitted to the digital signal processor; and the input end of the DAC module is accessed with a digital baseband signal from the digital signal processor, and after digital-to-analog conversion, the digital baseband signal is transmitted to the frequency conversion processing unit through the third operational amplifier and the second single-pole double-throw switch in sequence.

The utility model has the advantages that: the utility model integrates the optical module and the RS485 communication module, has rich interface resources, can transmit data with remote equipment through optical fibers, and transmits data with near field equipment through the RS485 communication module; and the ports are integrated and calibrated in each channel, so that consistency calibration among the channels is facilitated.

Drawings

FIG. 1 is a schematic diagram of the present invention;

fig. 2 is a schematic diagram of a radio frequency transceiving channel.

Detailed Description

The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.

As shown in fig. 1, a digital TR module includes a digital signal processor, an optical module, an optical fiber port, multiple radio frequency transceiving channels, a first local oscillator distribution network, a first local oscillator input port, a second local oscillator distribution network, and a second local oscillator input port;

In the embodiment of the application, the digital TR module further comprises an RS485 communication module, and the RS485 communication module is connected with the digital signal processor. The digital TR module further comprises a debugging port, and the debugging port is connected with the digital signal processor.

In the embodiment of the application, each path of the radio frequency transceiving channel comprises a radio frequency unit, a frequency conversion processing unit and a data conversion unit;

In the embodiment of the application, a first fixed end of the first single-pole double-throw switch is connected with the low noise amplifier, a second fixed end of the first single-pole double-throw switch is connected with the first power amplifier, and a movable end of the first single-pole double-throw switch is connected with the second filter;

and a first fixed end of the second single-pole double-throw switch is connected with the AGC amplifier, a second fixed end of the second single-pole double-throw switch is connected with the third operational amplifier, and a movable end of the second single-pole double-throw switch is connected with the fifth filter.

In the embodiment of the present application, a local oscillation signal input end of the first mixer is connected to a port LO1, which is used for inputting a local oscillation signal of the first mixer; and the local oscillation signal input end of the second frequency mixer is connected with a port LO2 for inputting the local oscillation signal of the second frequency mixer. The first local oscillator distribution network is a power distribution network and comprises at least one power divider; the output end of the first local oscillator distribution network is respectively connected with a port LO1 in each radio frequency transceiving channel. The second local oscillator distribution network is a power distribution network and comprises at least one power divider; and the output end of the second local oscillator distribution network is respectively connected with a port LO2 in each radio frequency transceiving channel.

In an embodiment of the present application, the digital TR module further includes a clock port, a clock processing module, and a clock distribution module, an input end of the clock processing module is connected to the clock port and is configured to access an external reference clock, an output end of the clock processing module is connected to a clock distribution network, and an output end of the clock distribution network is connected to the digital signal processor and each rf transceiving channel.

In an embodiment of the present application, the clock processing module includes a pi-type attenuator; the clock distribution network is a power distribution network and comprises at least one power divider, and the clock distribution network is respectively connected with the digital signal processor, the ADC module in each radio frequency transceiving channel and the DAC module in each radio frequency transceiving channel.

The working principle of the utility model is as follows:

in the process of signal transmission, a first single-pole double-throw switch in each radio frequency transceiving channel is switched, and a signal path between a second filter and a first power amplifier is switched on; simultaneously switching a second single-pole double-throw switch in each radio frequency transceiving channel to switch on a signal path between the fifth filter and the third operational amplifier; the digital signal processor receives a signal to be transmitted through the RS485 communication module or the optical module and the optical interface, transmits the signal to each radio frequency transceiving channel, processes the signal in each radio frequency transceiving channel and transmits the signal to the outside; in the process of receiving signals, a first single-pole double-throw switch in each radio frequency transceiving channel is switched, a signal path between a low-noise amplifier and a second filter is switched on, a second single-pole double-throw switch in each radio frequency transceiving channel is switched at the same time, a signal path between a fifth filter and an AGC amplifier is switched on, signals entering from radio frequency ports of the radio frequency transceiving channels are processed by the radio frequency transceiving channels and then transmitted to a digital signal processor, the signals are transmitted to remote equipment by the digital signal processor through an optical module and an optical fiber port, and the signals are transmitted to near-field equipment by an RS485 port; meanwhile, a coupler and a calibration port are integrated in each radio frequency transceiving channel, consistency calibration between the channels can be carried out, specifically, in the transmitting calibration process, a digital signal processor generates the same digital baseband signal for each radio frequency transceiving channel and transmits the same signal to the outside through the radio frequency transceiving channels, at the moment, the signal output by the radio frequency transceiving channels is directly obtained from the calibration port, after amplitude and phase detection is carried out, the amplitude and phase difference of each radio frequency transceiving channel in the transmitting direction can be known, and on the basis, amplitude and phase compensation can be carried out specifically; inputting the same radio frequency signals from the calibration ports of the radio frequency transceiving channels in the receiving calibration process, processing the same radio frequency signals by the radio frequency transceiving channels, and transmitting the same radio frequency signals to the digital signal processor; and then, amplitude and phase detection is carried out on the signals output by each radio frequency transceiving channel, so that the amplitude and phase difference of each radio frequency transceiving channel in the receiving direction can be obtained, and on the basis, amplitude and phase compensation can be carried out in a targeted manner.

It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit and essence of the invention, and these changes and modifications should fall within the scope of the appended claims.

Claims

1. A digital TR module, characterized by: the system comprises a digital signal processor, an optical module, an optical fiber port, a plurality of radio frequency transceiving channels, a first local oscillator distribution network, a first local oscillator input port, a second local oscillator distribution network and a second local oscillator input port;

2. A digital TR module as claimed in claim 1, wherein: the digital TR module further comprises an RS485 communication module, and the RS485 communication module is connected with the digital signal processor.

3. A digital TR module as claimed in claim 1, wherein: the digital TR module further comprises a debugging port, and the debugging port is connected with the digital signal processor.

4. A digital TR module as claimed in claim 1, wherein: each path of radio frequency transceiving channel comprises a radio frequency unit, a frequency conversion processing unit and a data conversion unit;

5. A digital TR module according to claim 4, wherein: the first fixed end of the first single-pole double-throw switch is connected with the low-noise amplifier, the second fixed end of the first single-pole double-throw switch is connected with the first power amplifier, and the movable end of the first single-pole double-throw switch is connected with the second filter;

6. A digital TR module according to claim 4, wherein: the local oscillation signal input end of the first frequency mixer is connected with a port LO1 for inputting the local oscillation signal of the first frequency mixer; and the local oscillation signal input end of the second frequency mixer is connected with a port LO2 for inputting the local oscillation signal of the second frequency mixer.

7. A digital TR module as claimed in claim 1, wherein: the first local oscillator distribution network is a power distribution network and comprises at least one power divider; the output end of the first local oscillator distribution network is respectively connected with a port LO1 in each radio frequency transceiving channel.

8. A digital TR module as claimed in claim 1, wherein: the second local oscillator distribution network is a power distribution network and comprises at least one power divider; and the output end of the second local oscillator distribution network is respectively connected with a port LO2 in each radio frequency transceiving channel.

9. A digital TR module as claimed in claim 1, wherein: the digital TR module further comprises a clock port, a clock processing module and a clock distribution module, wherein the input end of the clock processing module is connected with the clock port and used for accessing an external reference clock, the output end of the clock processing module is connected with a clock distribution network, and the output end of the clock distribution network is respectively connected with the digital signal processor and each radio frequency transceiving channel.

10. A digital TR module as claimed in claim 9, wherein: the clock processing module comprises a pi-type attenuator; the clock distribution network is a power distribution network and comprises at least one power divider, and the clock distribution network is respectively connected with the digital signal processor, the ADC module in each radio frequency transceiving channel and the DAC module in each radio frequency transceiving channel.