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A QPSK modulator

A technology of modulator and modulation circuit, applied in the direction of phase modulation carrier system, multi-carrier system, etc., can solve the problems of installation and adjustment risk points and heavy debugging workload, so as to avoid the difficulty of pressure welding, good amplitude and phase characteristics and matching characteristics , to avoid the effect of gold belt overlapping link

Active Publication Date: 2018-12-21
XIAN INSTITUE OF SPACE RADIO TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The problem solved by the technology of the present invention is: Aiming at the problem of how to avoid the installation and adjustment risk point and the heavy debugging workload of the existing modulator, starting from the design source, a QPSK modulator with good amplitude-phase characteristics and matching characteristics is proposed

Method used

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Embodiment Construction

[0048] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0049] Such as image 3 As shown, the present invention provides a kind of QPSK modulator, and this modulator comprises 1 / 4 electric bridge, the first BPSK modulation circuit, the second BPSK modulation circuit, 0° power combiner, wherein:

[0050] The 1 / 4 bridge divides the externally input carrier signal into two mutually orthogonal carrier signals (equal amplitude, 90° phase difference), and transmits the two orthogonal carrier signals to the first BPSK modulation circuit and the second 2. BPSK modulation circuit; Compared with the implementation of the Lange bridge, the operator does not need to crimp the Lange bridge gold wire under the microscope, and the risk points of debugging are also effectively controlled.

[0051] The first BPSK modulation circuit and the second BPSK modulation circuit modulate the received carrier signal according to th...

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Abstract

The invention provides a QPSK modulator which belongs to the technical field of electronic communication. The modulator includes a 1 / 4 bridge, a first BPSK modulation circuit, a second BPSK modulationcircuit, and a 0 DEG power combiner, wherein a 1 / 4 bridge divides an externally inputted carrier signal into two mutually orthogonal carrier signals and transmits the two orthogonal carrier signals to the first BPSK modulation circuit and the second BPSK modulation circuit respectively; The first BPSK modulation circuit and the second BPSK modulation circuit modulate the external input data according to the carrier signal to form two BPSK modulation signals for output to the 0 DEG power combiner. The 0 DEG power combiner combines two BPSK modulated signals into one output. The invention has good amplitude-phase characteristics and matching characteristics.

Description

technical field [0001] The invention relates to a QPSK modulator, specifically a microwave direct modulator, belonging to the technical field of electronic communication. Background technique [0002] The modulator / demodulator is the core device in communication and data transmission, and the reliability of its performance determines the performance of the transmission channel. In recent years, with the continuous development and upgrading of satellite communication products, the data rate is getting higher and higher, the coding logic is more and more complex, and reliability is becoming more and more important. [0003] At present, the microwave direct modulator used in domestic engineering is generally composed of a 90° electric bridge, a power combiner, and two BPSK modulation circuits. The functions of each part are: [0004] (1) The 90° electric bridge is realized by the Lange bridge, which is composed of a group of densely arranged fine interdigital connections, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/20H04L27/36
CPCH04L27/20H04L27/36
Inventor 贾宏丽白旭陈安和张伟吴刚李福张竞张瑞杰胡西阁杨宇蒲发军李春梅任辉
Owner XIAN INSTITUE OF SPACE RADIO TECH