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Double-tuned microwave spectrum analyzer

A microwave spectrum and analyzer technology, applied in spectrum analysis, instruments, measuring devices, etc., can solve the problems of high design cost, complex scheme, and high design and implementation requirements, and achieve the effect of reducing measurement cost, less difficult implementation, and simple design

Inactive Publication Date: 2011-09-14
ANHUI EGRETS ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The current microwave spectrum analyzer has high requirements for the frequency span and frequency range of the first local oscillator, and also has high requirements for the design and implementation of the high-band tunable bandpass filter. Generally speaking, the current microwave spectrum analyzer scheme is complicated. High design cost and difficult design implementation

Method used

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  • Double-tuned microwave spectrum analyzer
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  • Double-tuned microwave spectrum analyzer

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Embodiment Construction

[0014] see figure 2 , a double-tuned microwave spectrum analyzer, including a microwave amplifier, a switch filter matrix, a frequency conversion unit for primary tuning, a first intermediate frequency amplification and filtering unit, a secondary tuning frequency conversion unit, a second intermediate frequency amplification and filtering unit, and an intermediate frequency processing unit. The matrix is ​​a single band-pass filter or an array composed of a plurality of band-pass filters. The primary tuning frequency conversion unit includes a first mixer, and the signal input terminal of the first mixer is connected with a microwave local oscillator signal source. The primary tuning frequency conversion unit includes a second mixer, the signal input terminal of the second mixer is connected with a radio frequency local oscillator signal source, and the first and second intermediate frequency amplification and filtering units include signal amplifiers and filters connected in...

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Abstract

The invention discloses a double-tuned microwave spectrum analyzer. After a microwave input signal passes through a switch filtering matrix, the first frequency conversion of the microwave input signal is realized by utilizing a big step tunable microwave local oscillator, and the second frequency conversion of the microwave input signal is executed by utilizing a tunable radio frequency local oscillator with continuous frequency, so the frequency spectrum measurement of the microwave signal is realized. Requirements of various users on measurement can be met by changing the frequency of the step tunable microwave local oscillator and combination of filters of the switch filtering matrix according to requirements of users on practical measurement; and the double-tuned microwave spectrum analyzer is simple in design and easy to realize, and greatly lowers the measurement cost of users.

Description

technical field [0001] The invention relates to a double tuned microwave spectrum analyzer. Background technique [0002] The current sweep spectrum measurement generally adopts the superheterodyne method to down-convert the input signal, so as to analyze and process the signal at a fixed intermediate frequency. Such as figure 1 As shown, the radio frequency or microwave input signal is divided into two bands, high and low, through a two-choice switch. Mixed with the second local oscillator after band-pass filtering to generate the second intermediate frequency; the high-band signal is mixed with the first local oscillator after band-pass filtering to directly generate the second intermediate frequency; the second intermediate frequency signal generated by the low-band and high-band Mixing with the third local oscillator generates a third intermediate frequency with a lower frequency, and all signal analysis and processing are carried out around the third intermediate freq...

Claims

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Application Information

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IPC IPC(8): G01R23/165
Inventor 梁强陈仁北
Owner ANHUI EGRETS ELECTRONICS TECH
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