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Defected ground structure interdigital coupler

A defect grounding structure and interdigital coupling technology, applied in the microwave field, can solve the problems of demanding processing and production precision, deteriorating isolation effect, and reducing production technology, and achieve the effects of easy integration, good strong coupling, and lower requirements

Inactive Publication Date: 2013-11-27
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coupler aims at providing a broadband interdigital coupler with good isolation effect and reducing Requirements for the production process

Method used

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  • Defected ground structure interdigital coupler
  • Defected ground structure interdigital coupler
  • Defected ground structure interdigital coupler

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Embodiment Construction

[0020] A defect grounding structure interdigital coupler provided by the present invention, such as figure 1 and figure 2 as shown,

[0021] A defective grounding structure interdigital coupler, including a dielectric substrate 15, one side of the dielectric substrate 15 is respectively attached to four coupling metal strips and four microstrip feeders; the other side of the dielectric substrate 15 is attached to a microstrip grounding plate 13 and a DGS defect structure 14; the four coupling metal strips are arranged in the middle of the dielectric substrate; the DGS defect structure is located at the corresponding position of the four coupling metal strips;

[0022] The four coupling metal strips are respectively first to fourth coupling metal strips; the first to fourth coupling metal strips are arranged in parallel in sequence;

[0023] The four microstrip feeders are respectively first to fourth microstrip feeders;

[0024] One end of the first coupling metal strip 5 ...

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Abstract

The invention provides a defected ground structure interdigital coupler. Wire jumping bridging is adopted in the coupler to achieve four-wire interdigital coupling, accordingly, the large bandwidth is obtained, meanwhile, a DGS at the position of a ground plate of an interdigital coupling structure is introduced, current distribution of the interdigital coupling structure is changed, strong coupling of the coupler is guaranteed, the good isolation effect is achieved at the same time, and the work bandwidth of the coupler can be effectively increased. Meanwhile, the defected ground structure interdigital coupler is small in size and simple in structure, can be easily integrated with other parts, and reduces requirements for the processing process.

Description

technical field [0001] The invention belongs to the field of microwave technology, and specifically refers to a defective grounding structure interdigital coupler. Background technique [0002] As a microwave passive device, the coupler plays an indispensable role in the development of the entire microwave system; the development of broadband / ultra-wideband communication puts forward more stringent requirements for microwave passive devices including couplers. The coupler has a large bandwidth to meet the requirements of broadband communication, and can also increase the versatility of the device. Whether it is a coupler or a filter implemented by a coupled structure, in order to achieve a larger bandwidth, the coupling structure is required to have a strong coupling; for the interdigitated coupling structure, strong coupling means coupling strips and the spacing between strips On the one hand, this will deteriorate the isolation effect of the coupler, causing the isolation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P5/16
Inventor 许锋巫兆祥
Owner NANJING UNIV OF POSTS & TELECOMM
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