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Ultra-wideband band-pass filter with band stop characteristic

A band-pass filter and ultra-broadband technology, applied in the direction of waveguide devices, resonators, electrical components, etc., can solve the problems of demanding processing accuracy, etc., achieve large relative bandwidth, convenient mutual coupling strength, and good upper and lower stop band characteristics Effect

Inactive Publication Date: 2013-02-06
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The microstrip multimode resonator is a common resonator used to realize ultra-wideband filters, but due to the strong coupling between the resonator and the input / output feeder, the processing accuracy is demanding, so in the existing general processing accuracy conditions Under the circumstances, achieving the required strong coupling is a difficult point in the design of ultra-wideband filters

Method used

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  • Ultra-wideband band-pass filter with band stop characteristic
  • Ultra-wideband band-pass filter with band stop characteristic
  • Ultra-wideband band-pass filter with band stop characteristic

Examples

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Embodiment Construction

[0013] The bandpass filter of the embodiment of the present invention is as image 3 As shown, it is composed of the defective step impedance resonator 1 on the ground plane and the input 5 / output 6 feeder orthogonally coupled, and then three microstrip open-loop resonators 2, 3, 4 are added to the defective step impedance resonator pair coupling. figure 2 Shown is a microstrip open-loop resonator that produces a stopband; image 3 is a defect step impedance resonator that produces an ultra-wide passband.

[0014] The signal is input from the input port 5, and is coupled with the defect step impedance resonator through the feeder line. Since the defect step impedance resonator is a multimode resonator, the orthogonal strong coupling makes it produce a very wide passband. The total electrical length of the defect step impedance resonator is one wavelength (one wavelength at the ultra-wideband center frequency of 6.85 GHz). The large impedance part in the middle is a half-wa...

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Abstract

The invention discloses an ultra-wideband band-pass filter with band stop characteristic. The band-pass filter is characterized by consisting of a defected stepped-impedance resonator (DSIR) etched on a ground plane, three micro-strip open-loop resonators and an input / output feeder line, wherein the DSIR and the input / output feeder line are on different planes, and the input / output feeder line and the DSIR are arranged orthogonally; and the loaded three micro-strip square open-loop resonators and the DSIR are positioned on different circuit layers, and the three micro-strip square open-loop resonators are positioned above the DSIR. According to the band-pass filter, a transmission zero point is generated and a stop band is formed by using the opposite coupling of the open-loop resonators and the DSIR on the premise of keeping the circuit volume so as to effectively suppress wireless local area network signals.

Description

technical field [0001] The invention relates to an ultra-wideband band-pass filter with band-stop characteristics, belonging to the technical field of microwave transmission devices. Background technique [0002] Since the U.S. Federal Communications Commission (FCC) authorized the use of ultra-wideband (UWB) (3.1-10.6GHz) for indoor and handheld communication systems in 2002, low-cost UWB wireless communication systems are considered to be the most promising military and commercial applications. Communication Systems. As one of the very important passive devices in the communication system, UWB has received extensive attention from the academic circles. How to design a low-loss, small-volume, high-performance ultra-wideband filter has become a hot issue in recent years. However, my country's ultra-broadband wireless communication technology is still in its infancy. The microstrip multimode resonator is a common resonator used to realize ultra-wideband filters, but due to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/20H01P7/00H01P7/08
Inventor 官雪辉陈鹏刘海文
Owner EAST CHINA JIAOTONG UNIVERSITY
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