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Miniaturized double-stopband microstrip filter

A technology of microstrip filter and double stop band, which is applied in the direction of waveguide devices, electrical components, circuits, etc., can solve the problems of difficult microwave circuit integration and large size, and achieve the effect of reducing area and low cost

Inactive Publication Date: 2012-06-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies in the existing dual-stopband microstrip filter technology, the present invention proposes a miniaturized double-stopband microstrip filter to solve the problem that the existing double-stopband microstrip filter has a large size and is not Ease of integration with other planar microwave circuits

Method used

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  • Miniaturized double-stopband microstrip filter

Examples

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Embodiment Construction

[0015] The miniaturized dual-stopband microstrip filter proposed by the present invention, the overall structure schematic diagram of an embodiment is as follows figure 1 As shown, including: front part, back part and input and output ports.

[0016] Such as figure 2 As shown, the front part of the miniaturized double stopband microstrip filter in the present invention includes: the microstrip conduction band [1] above the dielectric plate [9] and the T-shaped defect microstrip structure. The T-shaped defect microstrip structure is formed by adding two vertically placed conductor strips [3, 4] to a rectangular air unit [2] etched on the microstrip conduction strip [1], in which the conductor strip [3 ] is not in contact with the microstrip conduction band [1], and the conductor band [4] is in contact with the microstrip conduction band [1]. In this embodiment, the dielectric constant of the selected dielectric plate [9] is 2.55, the thickness is 1.5mm, and the width of the ...

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Abstract

The invention relates to a miniaturized double-stopband microstrip filter, belonging to the technical field of microwave communication. The miniaturized double-stopband microstrip filter comprises a front surface part, a back surface part and an input / output port, wherein the front surface part consists of a microstrip conduction band and a T-shaped defect microstrip structure, and the back surface part consists of a ground plate unit and a U-shaped defect ground structure. The miniaturized double-stopband microstrip filter can be applied to suppression of double-frequency interference in a wireless communication system, and has the advantages of fully utilizing spaces of the microstrip conduction band and a ground unit, effectively reducing the areas of devices, thereby being beneficial to integration with other planar microwave circuits; simultaneously, the miniaturized double-stopband microstrip filter further has the characteristics of simple structure, free adjustability of double-stopband center frequency, easiness for implementation and the like.

Description

technical field [0001] The invention relates to a miniaturized double-stop band microstrip filter, which belongs to the field of microwave communication technology, and can be applied to suppress dual-frequency interference simultaneously existing in systems such as ultra-wideband wireless communication and high-power amplifiers, and is especially suitable for device size requirements high occasions. Background technique [0002] In recent years, dual stop-band filters are required in many multi-band wireless communication systems (such as GSM, WLAN, UWB) applications, because this type of filter can effectively suppress the simultaneous interference on two frequency bands. Compared with two cascaded traditional single-band stop-band filters, the dual stop-band filter has the advantages of smaller size, lower cost, less insertion loss in the passband, and lower group delay. On the other hand, microstrip filters have the advantages of low cost, convenient processing, and eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
Inventor 宁焕生汪俊何伟
Owner BEIHANG UNIV
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