High-directivity single- and dual-band directional couplers based on substrate integrated coaxial line technology

Author

Shen Jun-Yu ; Liu Qiang ; Wu Yong-Le ; Liu Yuan-an ; Li Shu-lan ; Yu Cui-Ping ; Lin Gan

Author_Institution

Dept. of Electron. Eng., Beijing Univ. of Posts & Telecommun., Beijing, China

fYear

2013

fDate

2-7 June 2013

Firstpage

1

Lastpage

4

Abstract

The high-directivity single- and dual-band directional couplers based on substrate integrated coaxial line (SICL) are first proposed in this paper. As the SICL features the propagation of TEM mode, the SICL directional coupler can keep its high-directivity compared with the microstrip one. The SICL coupler also characterizes a vias-shielded structure keeping it away from lateral leakage, cross-talk or unwanted parallel-plate mode. The design approaches of the single- and dual-band SICL couplers with proper width-spacing are given. Experiments are carried on a SICL 2.35 GHz coupler and a SICL 0.8/2.35 GHz coupler. Compared with microstrip couplers, the SICL ones show a great enhancement in directivity.

Keywords

coaxial cables; directional couplers; microstrip couplers; substrate integrated waveguides; SICL directional coupler; TEM mode propagation; dual-band SICL couplers; dual-band directional couplers; frequency 2.35 GHz; high-directivity single-band directional couplers; microstrip couplers; single-band SICL couplers; substrate integrated coaxial line technology; vias-shielded structure; width-spacing; Couplings; Directional couplers; Dual band; Frequency measurement; Microstrip; Strips; Directional couplers; dual band; high directivity; substrate integrated coaxial line (SICL);

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest (IMS), 2013 IEEE MTT-S International

Conference_Location

Seattle, WA

ISSN

0149-645X

Print_ISBN

978-1-4673-6177-4

Type

conf

DOI

10.1109/MWSYM.2013.6697492

Filename

6697492