Microstrip bandpass filter with sector open-circuit structure

A band-pass filter and fan-shaped technology, applied in the field of microwave/millimeter wave devices, can solve the problems of high processing technology requirements, increased filter length, unfavorable miniaturization of millimeter wave integrated circuits, etc.
CN101694899AInactive Publication Date: 2010-04-14UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2010-04-14
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a microstrip bandpass filter with a sector open-circuit structure, belonging to the technical field of microwave / millimeter wave devices and relating to a microwave / millimeter wave integrated circuit. Based on a traditional parallel coupling microstrip line filter, the microstrip bandpass filter with the sector open-circuit structure adds two sections of sector open-circuit shunts; either sector open-circuited shunt is a one-fourth wavelength terminal open-circuit line with a sector-structure end terminal; and the start terminals of the two sections of sector open-circuit shunts are perpendicularly connected with a center point of an auxiliary microstrip line. The invention has the advantages of simple form, compact structure and high beyond-strip attenuation, not only can be used in a microwave / millimeter wave integrated circuit, but also can be used in a submillimeter wave band with higher frequency. Meanwhile, an input microstrip line and an output microstrip line of the microstrip bandpass filter with the sector open-circuit structure are on the same straight line, thereby facilitating the application in practical projects.
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Description

technical field

[0001] The invention belongs to the technical field of microwave / millimeter wave devices, relates to microwave / millimeter wave integrated circuits, in particular to a microstrip bandpass filter used in microwave / millimeter wave integrated circuits. Background technique

[0002] The filter has a frequency selection function, passing the required frequency signal and suppressing the unwanted frequency signal. For the RF transceiver system, the filter is one of the widely used passive devices, and its performance will directly affect the performance of the entire system. With the increasing application of millimeter-wave technology in wireless communication and radar systems, the demand for millimeter-wave bandpass filters with small circuit size and simple fabrication is also increasing. Due to the convenience of microstrip in planar drawing and plate making, and easy integration with other circuits, microstrip bandpass filters have been widely used in the mil...

Claims

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