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Double-frequency duplexer based on substrate integrated waveguide

A substrate-integrated waveguide and duplexer technology, which is applied to waveguide-type devices, electrical components, circuits, etc., can solve the problems of bulky metal waveguides, difficult integration, and failure of microstrip lines, and achieves simple design structure and increased size Gain, easy industrial processing effect

Active Publication Date: 2019-09-06
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In high frequency applications, due to the small wavelength, too high tolerance requirements often make the microstrip line fail
However, traditional metal waveguides are bulky and difficult to planarly integrate with other microwave and millimeter wave circuits

Method used

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  • Double-frequency duplexer based on substrate integrated waveguide
  • Double-frequency duplexer based on substrate integrated waveguide
  • Double-frequency duplexer based on substrate integrated waveguide

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Such as Figure 4 As shown, a wave port is on the middle metal layer of the SIW cavity, that is, one microstrip line is on the middle metal layer of the two dielectric plates, and two equal slits are respectively set on both sides of the microstrip line, through which the microstrip The coplanar waveguide forms a wave port, and at the same time, metal through holes are arranged on two equal sides of the slit, and the same metal through holes are arranged on the other three sides, wherein the distances between the two through holes are equal. A T-shaped output port is set in the center of the upper and lower surfaces of the dual-frequency SIW duplexer to realize the power division of the signal. Such as Figure 6 As shown in the S-parameter simulation waveform diagram, the dual frequency points are 11.6GHz and 13.5GHz respectively, and the return loss is greater than 20dB and 22dB respectively, and its working performance is good.

Embodiment 2

[0034] Such as image 3 and 5 As shown, the duplexer is composed of upper and lower layers of double cavities, the middle metal layer is used as the isolation layer of the upper and lower layers, each cavity is composed of metal through holes around the dielectric substrate and upper and lower metal layers, and the cavities of the same layer are connected by coupling The window realizes signal transmission. Such as Figure 6 It is the S-parameter simulation waveform diagram of a compact dual-frequency duplexer with a double-layer substrate integrated waveguide. The dual frequency points are 11.6GHz and 13.5GHz, the return loss is greater than 20dB and 22dB, and the insertion loss is less than -1dB. Good performance.

[0035] The invention aims to provide a dual-frequency duplexer based on substrate integrated waveguide, which solves the problem of low passband gain of SIW filter and aims to lay a foundation for future research on filters with higher passband gain.

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Abstract

The invention discloses a double-frequency duplexer based on a substrate integrated waveguide. The double-frequency duplexer comprises a filter dielectric substrate, a top metal layer arranged on theupper surface of the filter dielectric substrate, a bottom metal layer arranged on the lower surface of the filter dielectric substrate, and a metal layer arranged between the upper surface of the filter dielectric substrate and the lower surface of the filter dielectric substrate; T-shaped output ports are formed in the metal layers on the upper surface and the lower surface of the filter mediumsubstrate; and an input feed network is arranged on the middle metal layer. The double-frequency duplexer is simple in design structure and easy for industrial processing; firstly a miniaturized double-frequency SIW-based double-frequency duplexer is introduced, so that the problem of relatively large size of a filter is solved to a relatively great extent; and secondly, the input feed network structure of the middle metal layer is introduced, so that the gain based on the SIW filter is further increased, and a foundation is laid for improvement of the passband gain of the double-frequency SIWfilter and improvement of the echo loss.

Description

technical field [0001] The invention relates to a dual-frequency duplexer based on a substrate integrated waveguide, which can be used in the technical field of millimeter waves. Background technique [0002] In high-frequency applications, microstrip lines often fail due to excessively high tolerance requirements due to small wavelengths. However, traditional metal waveguides are bulky and difficult to planarly integrate with other microwave and millimeter wave circuits. Since the substrate-integrated waveguide is a quasi-closed planar waveguide structure similar to ordinary metal waveguides, in addition to having planar integration characteristics similar to microstrip transmission lines, it almost strictly eliminates the interference caused by radiation and guided wave modes in the substrate. Interference between different parts of a circuit. At the same time, it has good compatibility with active devices, is convenient for planar integration and miniaturization, and ha...

Claims

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Application Information

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IPC IPC(8): H01P1/20H01P1/203H01P1/213
CPCH01P1/2002H01P1/203H01P1/213
Inventor 许锋李玉颖张玉华
Owner NANJING UNIV OF POSTS & TELECOMM
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