Device and method for simultaneously measuring frequencies of multiple microwave signals

A microwave signal and frequency technology, used in frequency measurement devices, frequency-to-amplitude conversion, etc., can solve the problem of measurement accuracy lower than 1GHz, and achieve the effect of wide measurement frequency range

Active Publication Date: 2018-03-06
MINNAN NORMAL UNIV
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Problems solved by technology

The existing light-assisted methods for simultaneous measurement of multiple microwave frequencies include frequency-space mapping type and frequency-time domain mapping type, and their measurement accuracy is lower than 1GHz

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  • Device and method for simultaneously measuring frequencies of multiple microwave signals
  • Device and method for simultaneously measuring frequencies of multiple microwave signals

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Embodiment Construction

[0019] The technical solutions in the embodiments of the present invention will be further described below in conjunction with the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] see figure 1As shown, a device for simultaneously measuring multiple microwave signal frequencies includes N+1 (N≥1) single-frequency lasers 1, a carrier-suppressing double-sideband modulator 2, a high-pass filter 3, and an optical isolator 4 , a splitter 5, N dispersion-shifted optical fibers 6, N optical circulators 7, N low-frequency photodetectors 8 and a data processor 9; the output end of the single-frequency laser 1 is connected to the carrier...

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Abstract

The invention discloses a device and a method for simultaneously measuring the frequencies of multiple microwave signals. An upper side-band optical signal including the frequency of a to-be-measuredmicrowave signal is obtained through a modulator and a filter and sent to dispersion shifted fibers. When the frequency difference of laser signals input to the two ends of any dispersion shifted fiber is Brillouin frequency shift, part of energy of a laser signal output by a corresponding single-frequency laser is transferred to the upper side-band optical signal. A data processor measures the output current of a low-frequency photoelectric detector under the condition that the to-be-measured microwave signal is not added and the output current of the low-frequency photoelectric detector under the condition that the to-be-measured microwave signal is added, and compares the currents. If the output current of the low-frequency photoelectric detector under the condition that the to-be-measured microwave signal is added is larger, the to-be-measured microwave signal contains a microwave signal of a corresponding frequency. If the output current of the low-frequency photoelectric detectorunder the condition that the to-be-measured microwave signal is added is unchanged or smaller, the to-be-measured microwave signal does not contain a microwave signal of a corresponding frequency. Multiple microwave frequencies can be instantaneously measured. Moreover, the measurement frequency range is wide, and the measurement resolution is as high as 0.1GHz.

Description

technical field [0001] The invention relates to the technical field of microwave frequency measurement, in particular to a device and method for simultaneously measuring a plurality of microwave signal frequencies. Background technique [0002] At present, light-assisted microwave frequency measurement has become a research hotspot due to its large bandwidth, anti-electromagnetic interference, low loss and small size. The common frequency-microwave power mapping type and frequency-optical power mapping type are suitable for measuring microwave signals containing only a single frequency. However, in a complex electromagnetic environment where various frequencies interleave, it is necessary to measure the frequencies of multiple microwave signals simultaneously. The existing light-assisted methods for simultaneous measurement of multiple microwave frequencies include frequency-space mapping type and frequency-time domain mapping type, and their measurement accuracy is lower t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/06
CPCY02A90/10
Inventor 张华林
Owner MINNAN NORMAL UNIV
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