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T-shaped micro-strip dual-mode band-pass filter

A filter and mode band technology, applied in waveguide devices, electrical components, circuits, etc., can solve the problems that the performance of microstrip dual-mode filters cannot meet the requirements, etc.

Inactive Publication Date: 2012-07-18
SHANGHAI MARITIME UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] However, the performance of the existing microstrip dual-mode filter cannot meet the requirements, so providing a microstrip dual-mode filter with superior performance is an urgent problem in this field.

Method used

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  • T-shaped micro-strip dual-mode band-pass filter
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  • T-shaped micro-strip dual-mode band-pass filter

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Embodiment Construction

[0017] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0018] Such as figure 1 As shown, the T-shaped microstrip dual-mode bandpass filter of the present invention has a main body of a "T"-shaped patch 1, and a feeder 2 is connected to both sides of the T-shaped patch 1 by means of slot coupling. An opening 3 is provided at the connection between the feeder 2 and the "T"-shaped patch 1, and the two side ends of the "T"-shaped patch 1 protrude into the opening 3 with a gap.

[0019] The present invention proposes a brand-new topological structure of microstrip band-pass filter, which is proved by Maxwell's equations. For the actual situation, it is difficult or impossible to prove theoretically by Maxwell's equations, so numerical methods can only be used to prove it. The method often used in engineer...

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Abstract

The invention discloses a T-shaped micro-strip dual-mode band-pass filter. The T-shaped micro-strip dual-mode band-pass filter is characterized by comprising a T-shaped patch, wherein two sides of one end of the T-shaped patch are respectively connected with a feeder line in a slot coupling mode; an opening is formed at a joint of the feeder line and the T-shaped patch; and two side ends of the T-shaped patch extend into the opening, and slots are reserved. With the T-shaped patch, the T-shaped micro-strip dual-mode band-pass filter is superior to band-pass filters in other shapes in terms of performance.

Description

technical field [0001] The invention relates to microwave communication technology, in particular to a microstrip dual-mode bandpass filter. Background technique [0002] From the perspective of the development of telecommunications, filters have always played an important role in microwave circuits, using more passive components, and have made continuous progress with the development of communication technology. [0003] From a practical point of view, miniaturization is an important research topic for all handheld electronic devices, such as portable mobile phones. In the radio frequency part, although the emergence of monolithic microwave integrated circuits (MMIC) indicates that the miniaturization of radio frequency active circuits such as amplifiers, modulators, and frequency converters is becoming more and more possible. However, there are many open problems in optimizing the size reduction of circuits containing resonators, such as RF filters and oscillators. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
Inventor 张友俊张吉曜
Owner SHANGHAI MARITIME UNIVERSITY
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