A receiver final stage amplifier with high third-order intermodulation suppression and intermodulation suppression method

A final amplifier and third-order intermodulation technology, which is applied to power amplifiers, improved amplifiers to reduce nonlinear distortion, electrical components, etc., can solve the problems of limited third-order intermodulation of the final amplifier of spaceborne microwave receivers, etc. Achieve low power consumption, low power, and improve the effect of third-order intermodulation suppression

Active Publication Date: 2018-04-10
XIAN INSTITUE OF SPACE RADIO TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies in the prior art, provide a receiver final stage amplifier with high third-order intermodulation suppression and an intermodulation suppression method, and focus on solving the third-order intermodulation of the existing satellite-borne microwave receiver final stage amplifier restricted question

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A receiver final stage amplifier with high third-order intermodulation suppression and intermodulation suppression method
  • A receiver final stage amplifier with high third-order intermodulation suppression and intermodulation suppression method
  • A receiver final stage amplifier with high third-order intermodulation suppression and intermodulation suppression method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The basic idea of ​​the present invention is to provide a receiver final stage amplifier with high third-order intermodulation suppression and an intermodulation suppression method, aiming at the problem of limited third-order intermodulation of the final stage amplifier of the existing satellite-borne microwave receiver. Realized by 90° branch line bridge, first 50Ω load resistor, first amplifier, second amplifier, attenuator, phase shifter, 90° coupler and second 50Ω load resistor. The specific method is to input the dual-tone signal to the input end of the 90° branch line bridge, the isolated end of the 90° branch line bridge is grounded through the first 50 ohm load resistor, and the two-way amplitudes of the output end of the 90° branch line bridge are equal. The two-tone signals with a phase difference of 90° are respectively input to the first amplifier and the second amplifier for amplification, the output signal of the first amplifier is input to the second inpu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A receiver final stage amplifier with high third-order intermodulation suppression and an intermodulation suppression method, including a 90° branch line bridge, a first 50Ω load resistance, a first amplifier, a second amplifier, an attenuator, a phase shifter, and a 90° coupler and a second 50Ω load resistor. The realization of the final stage amplifier in the present invention adds the second amplifier on the basis of the traditional single-stage medium power amplifier (the first amplifier), the second amplifier is a small signal amplifier, and the 1dB compression point is lower as 10~12dBm, and its output The signal has the characteristics of low main carrier power but high third-order intermodulation power. The two amplifiers are cascaded using a 90° branch line bridge at the input end, and are cascaded through a 90° coupler at the output end. The attenuator and phase shifter complete the adjustment of the amplitude and phase of the third-order intermodulation signal output by the second amplifier. The adjustment makes the third-order intermodulation products produced by the two amplifiers achieve equal amplitude and anti-phase at the synthesis end so as to realize power cancellation.

Description

technical field [0001] The invention relates to a receiver final-stage amplifier with high third-order intermodulation suppression and an intermodulation suppression method, belonging to the technical field of microwave circuits. Background technique [0002] With the continuous development of satellite technology and the continuous increase of satellite communication capacity, the system puts forward higher and higher requirements for the linearity of satellite-borne microwave receivers. Specifically, the satellite-borne microwave receiver is required to have good third-order intermodulation suppression performance at a relatively high input level. Usually, the third-order intermodulation suppression performance of the whole receiver is mainly determined by the third-order intermodulation suppression performance of the final stage amplifier of the receiver. [0003] The third-order intermodulation suppression performance of spaceborne microwave receiver is related to the i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H03F3/20H03F1/32H04B1/16
Inventor 张波朱正贤邓向科邵小亮徐鑫王毅
Owner XIAN INSTITUE OF SPACE RADIO TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap