CN206164515U

CN206164515U - Receiver frequency channel extension module

Info

Publication number: CN206164515U
Application number: CN201621153023.7U
Authority: CN
Inventors: 涂凡
Original assignee: Chengdu Anpuli Electronics Co Ltd
Current assignee: Chengdu Anpuli Electronics Co Ltd
Priority date: 2016-10-31
Filing date: 2016-10-31
Publication date: 2017-05-10
Anticipated expiration: 2026-10-31

Abstract

The utility model discloses a receiver frequency channel extension module, include broadband coupler of being connected with radio frequency incoming signal and the reference PLL who is connected with reference incoming signal, the output of broadband coupler is connected to double -pole double -throw's first input end, refer to to be connected with between PLL and the broadband coupler and rectify PLL and AGC amplifier, be equipped with data expanding unit between double -pole double -throw's second output and the second input. Wherein, data expanding unit is including the band pass filter, clipper -limiter, MGC amplifier, first detector, IF filter and the IF amplifier that connect gradually, be equipped with the low phase noise local oscillator between first detector and the reference PLL. The utility model discloses the frequency of utilization of expanded high performance broadband digital receiving machine to improve the application range of high performance broadband digital receiving machine.

Description

Receiver band spreading module

Technical field

The utility model is related to a kind of receiver band spreading module.

Background technology

In modern wireless communication systems, with the rise of the application of software radio, wideband digital receiver will be extensive Modern Communication System is applied to, but, as military affairs, radar, telecommunication satellite application are goed deep into, its application band can not meet Use requirement.At present the spread spectrum of receiver is used on the basis of original microwave receiver, by extension frequency mostly Mode is completed, it is ensured that the inheritance of product, and the phase noise of receiver, sensitivity, the purity of signal spectrum are always spread spectrum side Case needs the difficult problem for solving.

Utility model content

The purpose of this utility model is to provide a kind of receiver band spreading module, and expansible high performance broadband digital is received The usage frequency of machine, and improve the use range of high performance broadband digital receiver.

To solve above-mentioned technical problem, the utility model provides a kind of receiver band spreading module, including defeated with radio frequency The wide-band coupler for entering signal connection and the reference PLL being connected with the reference-input signal；The output of the wide-band coupler End is connected to the first input end of double-point double-throw switch；Be connected between the reference PLL and wide-band coupler correction PLL and AGC amplifier；Expanding element is provided between second output end and the second input of the double-point double-throw switch.

Wherein, expanding element includes bandpass filter, limiter, MGC amplifiers, frequency mixer, the intermediate frequency filter being sequentially connected Ripple device and intermediate frequency amplifier；The frequency mixer and with reference to being provided with Low phase noise local oscillator between PLL.

The beneficial effects of the utility model are：The application is by the second output end in double-point double-throw switch and the second input Expanding element is set between end, with the usage frequency of expansible high performance broadband digital receiver.Also, in the application also simultaneously The calibration function of receiver is increased, so as to improve the use range of high performance broadband digital receiver.

Description of the drawings

Fig. 1 is the structural representation of the utility model one embodiment.

Specific embodiment

Specific embodiment of the present utility model is described below, in order to those skilled in the art's understanding The utility model, it should be apparent that the utility model is not limited to the scope of specific embodiment, the common skill to the art For art personnel, as long as various change is in the spirit and scope of the present utility model of appended claim restriction and determination, These changes are it will be apparent that all utilize the innovation and creation of the utility model design in the row of protection.

Receiver band spreading module as shown in Figure 1, including the wide-band coupler being connected with radio-frequency input signals and with The reference PLL of reference-input signal connection（With reference to phaselocked loop）, and the output end of wide-band coupler is connected to double-point double-throw switch First input end；PLL and AGC amplifier are corrected with reference to being connected between PLL and wide-band coupler（Automatic growth control amplifies Device）.

Additionally, being provided with expanding element, expanding element bag between second output end and the second input of double-point double-throw switch Include bandpass filter, limiter, the MGC amplifiers being sequentially connected（Manual gain controls amplifier）, frequency mixer, intermediate-frequency filter And intermediate frequency amplifier；Frequency mixer and with reference to being provided with Low phase noise local oscillator between PLL.

The application by arranging expanding element between second output end and the second input of double-point double-throw switch, with can The usage frequency of extension high performance broadband digital receiver.Also, also increased the calibration function of receiver in the application simultaneously, So as to improve the use range of high performance broadband digital receiver.

The operation principle of the receiver band spreading module is：When operation of receiver is in original frequency range, DPDT is opened Close and directly export the signal that coupler is exported, now module only has the Insertion Loss of very little, has substantially no effect on the property of receiver below Energy；When needing to work in extended frequency band, the output of coupler is connected to bandpass filter, puts intermediate frequency by double-point double-throw switch The output of big device is connected to output, such input signal after bandpass filter, limiter, MGC amplifiers with Low phase noise sheet Shake and be mixed, output signal amplify after filtering after again through double-point double-throw switch export, and now behind receiver Jing can process intermediate-freuqncy signal.

Claims

1. a kind of receiver band spreading module, it is characterised in that include the wide-band coupler that is connected with radio-frequency input signals and The reference PLL being connected with reference-input signal；It is first defeated that the output end of the wide-band coupler is connected to double-point double-throw switch Enter end；Correction PLL and AGC amplifier are connected between the reference PLL and wide-band coupler；The of the double-point double-throw switch Expanding element is provided between two output ends and the second input；

The expanding element include be sequentially connected bandpass filter, limiter, MGC amplifiers, frequency mixer, intermediate-frequency filter and Intermediate frequency amplifier；The frequency mixer and with reference to being provided with Low phase noise local oscillator between PLL.