Single-cavity dual-band microwave filter based on coplanar waveguide

A microwave filter and coplanar waveguide technology, which is applied to waveguide devices, circuits, electrical components, etc., can solve the problems of high insertion loss, low utilization of spectrum resources, and large volume, and achieve the effect of miniaturization

Pending Publication Date: 2019-11-05
EAST CHINA NORMAL UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

Ordinary filters can only transmit information in a single frequency band, and the utilization rate of spectrum resources is not high. Traditional dual-band f

Method used

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  • Single-cavity dual-band microwave filter based on coplanar waveguide
  • Single-cavity dual-band microwave filter based on coplanar waveguide
  • Single-cavity dual-band microwave filter based on coplanar waveguide

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] refer to Figure 1~3 , The filter of the present invention has a three-layer structure, including a dielectric substrate 1 , a first metal layer 2 on the upper surface of the dielectric substrate 1 , and a second metal layer 3 on the lower surface. The dielectric substrate 1 of the filter is in the shape of a rectangle, and in the center there is a through hole 10 whose inner wall is coated with a copper film.

[0024] refer to figure 1 , figure 2 , the first metal layer 2 is printed on the upper surface of the dielectric substrate 1 , and its length and width are the same as those of the dielectric substrate 1 . figure 2 It is a top view of the present invention, that is, a structural diagram of the first metal layer 2 . like figure 2 As shown, a pair of left-right symmetrical rectangular input and output port slots 7 are respectively op...

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Abstract

The invention discloses a single-cavity dual-band microwave filter based on a coplanar waveguide. Metal patches are respectively formed by etching on the upper and lower sides of a printed circuit board. One side is used as a metal ground, and a slot is arranged in the metal patch on the other side, so as to obtain a coplanar waveguide resonator. A pass band with dual-mode characteristic is obtained by setting input and output ports in rotational symmetry. By adding a grounded central through hole and arranging symmetrical T-slots on the two sides of the central through hole, the single-cavitydual-band microwave filter is divided into four regions, four resonance modes can be generated in the cavity, and a coplanar waveguide filter with dual-pass-band characteristic is obtained. The miniaturization of the filter with dual-band characteristic is realized.

Description

technical field [0001] The invention belongs to the technical field of optics / microwave, wireless communication and test simulation, and in particular relates to a coplanar waveguide filter with dual frequency band characteristics. Background technique [0002] With the rapid development of wireless communication technology, the electromagnetic spectrum is becoming increasingly crowded. As an important component in the communication system, the microwave filter plays a very important role in the communication equipment. Therefore, the performance indicators of the filter are proposed more and more higher requirements. In order to meet the needs of wireless communication towards multi-band and multi-mode development, the research on multi-passband microwave filters is of great significance. Ordinary filters can only transmit information in a single frequency band, and the utilization rate of spectrum resources is not high. Traditional dual-band filters are realized by direct...

Claims

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Application Information

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IPC IPC(8): H01P1/212
CPCH01P1/212
Inventor 梁菁翟国华杨耀丁军
Owner EAST CHINA NORMAL UNIVERSITY
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