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2-18GHz square law detector

A detector and square-law technology, applied in the field of communication, can solve the problems of insufficient harmonic suppression and insufficient voltage sensitivity of broadband detectors, and achieve good reflection coefficient and frequency band matching, high suppression, and harmonic suppression. high degree of effect

Inactive Publication Date: 2020-01-17
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a 2-18GHz square-law detector, which solves the shortcomings of the broadband detector's low voltage sensitivity and insufficient harmonic suppression in the broadband

Method used

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Embodiment Construction

[0029] The square-law detector of 2-18GHz described in the present invention works in a zero bias state and includes an input matching network 1, a detector diode 2 and a low-pass filter 3; the circuit uses a standard commercial dielectric substrate (Rogers 4350, 20mil thickness ) manufacturing; the input matching network 1 of the detector must use an appropriate matching network to obtain high voltage sensitivity, so that as much input signal power as possible can enter the diode. In this design, the structure of the ladder impedance transformation and the open circuit The shorted stubs are used as a matching network. The detector diode 2 of the detector uses the P-type Schottky low barrier detector diode SMS7630-079LF of Skyworks, and its series resistance R S =20Ω, junction capacitance C j =0.14pF, the corresponding NEP is better than 1.49pW / √Hz; the low-pass filter 3 of the detector adopts a fan-shaped stub microstrip filter in the form of high and low impedance, becaus...

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Abstract

The invention discloses a 2-18GHz square law detector, which comprises an input matching network, a detector diode and a low-pass filter, and is characterized in that one end of the detector diode isconnected with the input matching network, and the other end of the detector diode is connected with the low-pass filter. The Schottky diode is a P-type Schottky low-barrier detection diode SMS7630-079LF of Skyworks. The detector works in a zero bias state; the working frequency range is 2-18 GHz, the voltage sensitivity is higher than 1500 mV / mW through a rear-stage low-pass filter matched with afront-stage impedance network, the peak value of about 6000 mV / mW at 5 GHz is achieved, the corresponding NEP is superior to 1.49 pW / Hz, the bandwidth is wide, and the harmonic suppression degree ishigh.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a 2-18GHz square law detector. [0002] technical background [0003] Using a simple detection circuit, Schottky detection diodes can convert microwave radio frequency energy into DC voltage, and its analysis methods can be divided into two categories: one is the small signal (low input power) analysis model - the work of square law detection mode; the other is the large signal (high input power) analysis model - the working mode of linear detection. But in actual work, the detection diode can work in the small signal mode and may work in the large signal mode at the same time. Moreover, with the development of communication technology and the expansion of the application range of the detection diode, the requirements for it are getting higher and higher, and its dynamic range is required to be larger and larger. Therefore, the detection characteristics of diod...

Claims

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Application Information

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IPC IPC(8): H03H11/46H03L5/00
CPCH03H11/46H03L5/00
Inventor 李颖王晓青
Owner NANJING UNIV OF SCI & TECH
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