CN205945653U

CN205945653U - Centralized down converter of multichannel

Info

Publication number: CN205945653U
Application number: CN201620941589.XU
Authority: CN
Inventors: 王小平; 冯勇刚; 杨万明; 王雪
Original assignee: Chengdu Yi Chuang Technology Co Ltd
Current assignee: Chengdu Yi Chuang Technology Co Ltd
Priority date: 2016-08-25
Filing date: 2016-08-25
Publication date: 2017-02-08
Anticipated expiration: 2026-08-25

Abstract

The utility model discloses a centralized down converter of multichannel is formed by several down converter set, and every down converter includes that the low noise puts subunit spare, radio frequency front end subunit spare, 1 down coversion subunit spare, 2 down coversion subunit spares, cable transmission subunit spare, intermediate frequency compensation subunit spare. Wherein, the low noise is put subunit spare and is comprised clipper -limiter, single -pole double -throw, isolator, switch filter I, low -noise amplifier, radio frequency front end subunit spare comprises switch filter II, digital control attenuator, amplifier, 1 inferior down coversion subunit spare comprises first detector I, switch filter III, amplifier, 2 inferior down coversion subunit spare comprises first detector II, switch filter IV, gain compensation ware I. The utility model discloses an integration of multichannel frequency conversion channel can make multichannel high frequency signal carry out down coversion, power amplification and gain control simultaneously, has improved the uniformity of multichannel, and the commonality is stronger. Control accuracy is high, can adapt to wide dynamic range incoming signal.

Description

A kind of centralized low-converter of multichannel

Technical field

This utility model is related to a kind of converter, the centralized low-converter of specially a kind of multichannel, belongs to radar, electronics The radio frequency arts such as antagonism remote measurement.

Background technology

Converter is divided into upconverter and low-converter, major function be by low frequency signal frequency conversion be high-frequency signal, or High-frequency signal frequency conversion is low frequency signal, signal is amplified simultaneously, filters and gain control, be modern radar, electronics pair The indispensable equipment of system equipment such as anti-, telemetry and telecommand.With the development of technology, for the needs quickly measuring, generally Multiple signals can be used simultaneously, at this moment be accomplished by multiple frequency conversion channels and use simultaneously, but the big portion of currently used converter Dividing is all single channel model, most of only one of which passages, when needing using multiple frequency conversion channel, have to buy multiple independent Frequency converter product, purchase cost is high, it is big to take up room, power consumption is high in-convenience in use.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of multichannel centralized low-converter, This converter by modularly integrated for multiple frequency conversion channel in the product, formed a kind of integration centralized multichannel down coversion Device, takes up an area volume, equipment power dissipation to reduce, and facilitates use, management and the maintenance in later stage.

This utility model is realized by the following technical solutions：The centralized low-converter of this multichannel, by several lower changes Frequency device set forms, each low-converter include LNA sub-component, radio-frequency front-end sub-component that signal successively links together, 1 time down coversion sub-component, 2 down coversion sub-components, cable transmission sub-component, intermediate frequencies compensate sub-component, wherein：

2 amplitude limiters, single-pole double-throw switch (SPDT), isolator, switches that LNA sub-component is linked together by signal successively Wave filter I, single-pole double-throw switch (SPDT), low-noise amplifier, single-pole double-throw switch (SPDT) are constituted；

Switch filter II that radio-frequency front-end sub-component is linked together by signal successively, numerical-control attenuator, amplifier structure Become；

Frequency mixer I that 1 down coversion sub-component is linked together by signal successively, switch filter III, amplifier are constituted；

Frequency mixer II that 2 down coversion sub-components are linked together by signal successively, switch filter IV, gain compensator I composition；

Intermediate frequency compensates sub-component and is made up of single gain compensator II.

Further, described switch filter I, the frequency of switch filter II are 8-12G, the frequency of switch filter III For 3.38G, the frequency of switch filter IV is 20/200M.

The beneficial effects of the utility model are：

1st, design and reconfigured amplitude limiter, amplifier, numerical-control attenuator, switch filter, stepping in down going channel The critical components such as attenuator, can carry out low noise amplification to radiofrequency signal, not only increase converter burn-out resistance, and Substantially increase receipt signal linear dynamic range, extend frequency conversion channel.

2nd, this utility model achieves the integrated of multichannel frequency conversion channel, enables to Multi-channel high-frequency signal and carries out lower change simultaneously Frequently, power amplification and gain control, improves multichannel concordance, and versatility is stronger.Adopt numerical-control attenuator complete simultaneously Become gain control, control accuracy is high, can adapt to wide dynamic range input signal, employs multiple switch wave filter, further Improve the linearity of channel, make converter obtain the purity of frequency spectrum in higher band.

Brief description

Fig. 1 is this utility model structured flowchart；

Fig. 2 is low-converter theory diagram in this utility model.

Specific embodiment

Below in conjunction with the accompanying drawings and specific embodiment is described further to this utility model.

In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only in order to explain this Utility model, is not used to limit this utility model.

As shown in figure 1, the utility model discloses a kind of centralized low-converter of multichannel, the centralized lower change of this multichannel Frequency device, is formed by several low-converter set.Each low-converter include LNA sub-component that signal successively links together, Radio-frequency front-end sub-component, 1 down coversion sub-component, 2 down coversion sub-components, cable transmission sub-component, intermediate frequencies compensate sub-component, As shown in Fig. 2 wherein：

In the present embodiment, described switch filter I, the frequency of switch filter II are 8-12G, switch filter III Frequency is 3.38G, and the frequency of switch filter IV is 20/200M.

In the present embodiment, the mechanical realization of low-converter and other electrical interface cabinet is not made and being illustrated, ability Field technique personnel voluntarily can build according to practical situation.

This utility model achieves the integrated of multichannel frequency conversion channel, enables to Multi-channel high-frequency signal and carries out lower change simultaneously Frequently, power amplification and gain control, improves multichannel concordance, and versatility is stronger.Adopt numerical-control attenuator complete simultaneously Become gain control, control accuracy is high, can adapt to wide dynamic range input signal, employs multiple switch wave filter, further Improve the linearity of channel, make converter obtain the purity of frequency spectrum in higher band.

Above is embodiment description is to explanation of the present utility model, is not to restriction of the present utility model,

This utility model limited range referring to claim, in the situation without prejudice to this utility model basic conception Under, this utility model can make the modification of other forms.

Claims

1. a kind of centralized low-converter of multichannel, is formed by several low-converter set, each low-converter includes believing successively Number the LNA sub-component linking together, radio-frequency front-end sub-component, 1 down coversion sub-component, 2 down coversion sub-components, electricity Cable transmission sub-component, intermediate frequency compensate sub-component it is characterised in that：

2 amplitude limiters, single-pole double-throw switch (SPDT), isolator, switch filterings that LNA sub-component is linked together by signal successively Device I, single-pole double-throw switch (SPDT), low-noise amplifier, single-pole double-throw switch (SPDT) are constituted；

Switch filter II that radio-frequency front-end sub-component is linked together by signal successively, numerical-control attenuator, amplifier are constituted；

Frequency mixer II that 2 down coversion sub-components are linked together by signal successively, switch filter IV, gain compensator I structure Become；

2. a kind of centralized low-converter of multichannel according to claim 1 it is characterised in that described switch filter I, The frequency of switch filter II is 8-12G, and the frequency of switch filter III is 3.38G, and the frequency of switch filter IV is 20/ 200M.