Substrate-integrated waveguide filtering crossover having a dual mode rectangular cavity coupled to eight single mode square cavities

Patent metadata

Field	Value
Publication number	US-11509031-B2
Application number	US-202117144883-A
Country	US
Kind code	B2
Filing date	Jan 8, 2021
Priority date	Jan 8, 2021
Publication date	Nov 22, 2022
Grant date	Nov 22, 2022

Abstract

Various substrate-integrated waveguide (SIW) filtering crossover systems are described. An example SIW filtering crossover system may include: a substrate; a top metal plate placed on top of the substrate; a bottom metal plate placed beneath the substrate; a plurality of metalized via-holes in the substrate connecting the top metal plate and the bottom metal plate; and a plurality of grounded-coplanar-waveguides (GCPWs) coupled to sidewalls of the crossover system, wherein each of the GCPWs connects the crossover system to a respective microstrip line for signal transmission between the respective microstrip line and the crossover system.

First claim

The invention claimed is:

1. A substrate-integrated waveguide (SIW) filtering crossover system, comprising:
a dual-mode substrate-integrated rectangular cavity (SIRC); and
a plurality of single-mode SIW square cavities comprising eight single-mode SIW square cavities;
wherein two of the eight single-mode SIW square cavities are coupled to a respective side of the dual-mode SIRC.

2. The system of claim 1 , further comprising a plurality of microstrip lines, wherein each of the plurality of microstrip lines is fabricated on a respective SIW square cavity from the plurality of single-mode SIW square cavities.

3. The system of claim 1 , wherein the dual-mode SIRC operates with TE 102 and TE 201 mode resonances.

4. The system of claim 1 , wherein a first transmission route is formed by the dual-mode SIRC and four of the eight single-mode SIW square cavities.

5. The system of claim 4 , wherein a second transmission route is formed by the dual-mode SIRC and the remaining four of the eight single-mode SIW square cavities.

6. The system of claim 5 , wherein an offset variable is configured for a port of the first or second transmission route to reject unwanted spurious resonant peaks of a received signal.

7. A substrate integrated waveguide (SIW) filtering crossover system comprising:
a substrate;
a top metal plate placed on top of the substrate;
a bottom metal plate placed beneath the substrate;
a plurality of metalized via-holes in the substrate connecting the top metal plate and the bottom metal plate, one or more rows of metalized via-holes in the plurality of metalized via-holes being centered around a center of the system to form a dual-mode substrate-integrated rectangular cavity (SIRC) at the center of the system and one or more rows of metalized via-holes in the plurality of metalized via-holes being positioned along the sidewalls of the system to form eight single-mode SIW square cavities, wherein two of the eight single-mode SIW square cavities are coupled to a respective side of the dual-mode SIRC; and
a plurality of grounded-coplanar-waveguides (GCPWs) coupled to the top metal plate of the crossover system, wherein each of the GCPWs connects the crossover system to a respective microstrip line for signal transmission between the respective microstrip line and the crossover system.

8. The system of claim 7 , further comprising one or more coupling windows on the sidewalls configured to control one or more internal couplings based on specified bandwidths.

9. The system of claim 8 , further comprising one or more coupling windows, each arranged at a center position of a sidewall of one or more SIW cavities to suppress unwanted even-mode spurious resonant peaks in upper stopband of two channel filters.

10. The system of claim 8 , further comprising one or more coupling windows, each arranged at a center position of a sidewall of the dual-mode SIRC to isolate two intersecting channels in the dual-mode SIRC.

11. The system of claim 7 , wherein the dual-mode SIRC is a rectangular cavity configured to facilitate different frequencies of one or more channel filters within the system.

12. The system of claim 7 , wherein the single-mode SIW square cavities are configured with different sizes to facilitate different frequencies of one or more channel filters within the system.

13. The system of claim 7 , wherein the single-mode SIW square cavities are orthogonally arranged to suppress spurious peaks in upper stopband.

Assignees

• Zhou Kang
• Wu Ke
• Huawei Tech Canada Co Ltd

Inventors

• Zhou Kang
• Wu Ke

Classifications

• H01P1/2135

  using strip line filters (H01P1/2131 takes precedence) · CPC title

• H01P1/2088 Primary

  Integrated in a substrate · CPC title

• H01P1/212

  suppressing or attenuating harmonic frequencies (H01P1/215 takes precedence) · CPC title

• H01P3/006

  Conductor backed coplanar waveguides · CPC title

• H01P1/2082 Primary

  with multimode resonators (H01P1/2086 takes precedence) · CPC title