Method for measuring inter-modulation spectral lines by using network analyzer based on multi-voice excited step recovery diode (SRD) pulse generator

A technology of recovering diodes and pulse generators, applied to measuring devices, measuring electrical variables, instruments, etc., to achieve the effect of improving the measurement function

Inactive Publication Date: 2013-01-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the problem that the harmonic phase reference of the existing SRD pulse generator based on single-tone excitation cannot provide intermodulation spectral lines with controllable quantity and resolution near each harmonic frequency point

Method used

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  • Method for measuring inter-modulation spectral lines by using network analyzer based on multi-voice excited step recovery diode (SRD) pulse generator
  • Method for measuring inter-modulation spectral lines by using network analyzer based on multi-voice excited step recovery diode (SRD) pulse generator
  • Method for measuring inter-modulation spectral lines by using network analyzer based on multi-voice excited step recovery diode (SRD) pulse generator

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specific Embodiment approach 1

[0022] Specific embodiments one, the method for measuring the intermodulation spectral line based on the network analyzer of the multi-tone excitation step recovery diode pulse generator described in the present embodiment, the specific implementation steps of the measurement method are:

[0023] Step 1, the signal output end of the pulse generator based on the step recovery diode is connected with the phase reference signal input end of the nonlinear vector network analyzer;

[0024] Step 2, the excitation signal input end of the pulse generator based on the step recovery diode is connected with the excitation signal output end of the multi-tone excitation signal generator;

[0025] Step 3, setting the tone number n, center frequency f, and frequency interval Δf of multitone excitation in the multitone excitation signal generator, the center frequency is set to an integer multiple of f, and the frequency interval is set to be an integer multiple of Δf, according to the require...

specific Embodiment approach 2

[0031] Specific embodiment two, this embodiment is a further description of the method for measuring the intermodulation spectral line based on the network analyzer of the multi-tone excitation step recovery diode pulse generator described in the specific implementation one, and measures a non-linear vector network analyzer 17-tone modulation signal, the center frequency is 5GHz, and the frequency interval is 40kHz. The steps to take a measurement are as follows:

[0032] Step 1, the signal output end of the pulse generator based on the step recovery diode is connected with the phase reference signal input end of the nonlinear vector network analyzer;

[0033] Step 2, the excitation signal input end of the pulse generator based on the step recovery diode is connected with the excitation signal output end of the multi-tone excitation signal generator;

[0034] Step 3, setting the tone number n, center frequency f, and frequency interval Δf of multitone excitation in the multit...

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Abstract

The invention discloses a method for measuring inter-modulation spectral lines by using a network analyzer based on a multi-voice excited step recovery diode (SRD) pulse generator and relates to a method for measuring inter-modulation spectral lines. The method solves the problem that the harmonic phase reference of the conventional single-voice excited SRD pulse generator cannot provide the inter-modulation spectral lines with controllable quantity and resolution nearby each sub-harmonic frequency point. The signal output end of the SRD-based pulse generator is connected with the phase reference signal input end of the nonlinear vector network analyzer (NVNA); the excitation signal input end of the SRD-based pulse generator is connected with the excitation signal output end of a multi-voice excitation signal generator; and the output provided with a vector signal generator is used as excitation of the SRD-based pulse generator, n-voice modulation signals to be detected are input to a measurement port, phase reference signals are added to all measurement frequency points, meanwhile, continuous and stable detected spectral lines are provided, and thus an effective measurement value of a detected channel phase spectrum is obtained. The method is used for measuring the inter-modulation spectral lines.

Description

technical field [0001] The invention relates to a method for measuring intermodulation spectral lines. Background technique [0002] The pulse sequence output by the step recovery diode pulse generator under sine wave excitation has significant harmonic nonlinearity in the frequency domain, which can be used for nonlinear network measurements such as nonlinear vector network analyzer (NVNA, Nonlinear Vector Network Analyzer) and LSNA The platform provides an effective harmonic phase reference signal. Traditional phase references based on step recovery diode (SRD, Step Recovery Diode)) pulse generators all work in the harmonic mode under single-tone sinusoidal excitation, which cannot provide fine spectral resolution while ensuring the effective harmonic bandwidth. It can realize the phase measurement of the broadband harmonic signal, but cannot meet the phase measurement requirements of the narrowband modulation signal. [0003] So far, all phase reference designs are base...

Claims

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Application Information

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IPC IPC(8): G01R25/00
Inventor 张亦弛林茂六苟元潇
Owner HARBIN INST OF TECH
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