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Band pass filter based on a T-shaped sub-loaded half-wavelength resonator

A resonator, half-wavelength technology, applied in the field of ultra-wideband communication, to achieve excellent frequency selectivity, small size, and good out-of-band suppression

Inactive Publication Date: 2016-02-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the existing ultra-wideband bandpass filter, providing a microstrip ultra-wideband bandpass filter based on T-shaped stub loaded half-wavelength resonators

Method used

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  • Band pass filter based on a T-shaped sub-loaded half-wavelength resonator
  • Band pass filter based on a T-shaped sub-loaded half-wavelength resonator
  • Band pass filter based on a T-shaped sub-loaded half-wavelength resonator

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the embodiments of the present invention are not limited thereto. The positive side of the example is as image 3 As shown, the metal upper cladding layer I of the microstrip includes the following patterns: input feeder 1, gradient impedance transmission line section 11, open transmission line section 12, open transmission line section 13, open quarter wavelength transmission line section 14, open transmission line section 31. T-shaped structure with terminal open circuit 32, transmission line section with terminal short circuit 33, metallized through hole 34, metallized through hole 35, T-shaped structure with terminal short circuit 36, metallized through hole 37, metallized through hole 38, open circuit Transmission line section 39 , open quarter wavelength transmission line section 24 , open transmission line section 23 , open transmissio...

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Abstract

An ultra-wide band filter is a key device in an ultra-wide band communication system and determines the overall performance of the system. The invention relates to a microstrip ultra-wide band pass filter, which is based on a novel T-shaped sub-loaded half-wavelength resonator. The microstrip ultra-wide band pass filter is characterized in that an open circuit transmission line node 31 and an open circuit transmission line node 39 form a half-wavelength resonator, and a terminal open circuit T-shaped structure 32 is loaded in the middle of the half-wavelength resonator; the terminal open circuit T-shaped structure 32 is coupled to a transmission line node 33 the two ends of which are short circuits, and the short circuits are realized by a metalized through hole 34 and a metalized through hole 35; a terminal short circuit T-shaped structure 36 is loaded in the middle of the half-wavelength resonator, and short circuits are realized by a metalized through hole 37 and a metalized through hole 38. Moreover, an input end and an output end of the filter are each connected to a quarter-wave transmission line node to improve the frequency selectivity of the filter. The research shows that the ultra-wide band pass filter has the excellent frequency characteristic, etc.

Description

technical field [0001] The invention belongs to the technical field of ultra-wideband communication, and in particular relates to a microstrip ultra-wideband bandpass filter based on a T-shaped stub-loaded half-wavelength resonator. Background technique [0002] In 2002, the Federal Communications Commission (FCC) of the United States opened the frequency band between 3.1 GHz and 10.6 GHz for applications in the communication field. Because of its advantages such as high transmission rate and low transmission loss, UWB communication has received extensive attention and developed rapidly. As a key device in an ultra-wideband communication system, the performance of the ultra-wideband bandpass filter determines the overall performance of the system. However, designing small, high-performance, and low-cost filters remains a major challenge. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the existing ultra-wideband ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
Inventor 肖飞李伟焦益民张亭唐小宏
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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