A compact X-band CPW branch-line coupler using glass integrated passive device (GIPD) technology

Author

Yu-Tzu Chen ; Chih-Lin Chang ; Chao-Hsiung Tseng

Author_Institution

Dept. of Electron. & Comput. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan

fYear

2013

fDate

5-8 Nov. 2013

Firstpage

276

Lastpage

278

Abstract

In this paper, a compact X-band CPW branchline coupler is proposed using the glass integrated passive device (GIPD) technology. To reduce the circuit size and retain a similar return-loss bandwidth to that of conventional coupler, the asymmetrical CPW branch-type T-structures are employed to implement the proposed coupler. Each T-structure is realized by two sections of high-impedance lines with unequal lengths and a set of branch-type shunt stubs. The developed coupler has a 31.5 % 10-dB return loss bandwidth and only occupies a 17.79 % circuit size of the conventional one. The measured results of the developed branch-line coupler are in a good agreement with simulated results.

Keywords

coplanar waveguides; microwave devices; waveguide couplers; CPW branch-line coupler; GIPD technology; X-band coupler; asymmetrical CPW branch-type T-structures; circuit size; compact coupler; glass integrated passive device technology; impedance lines; shunt stubs; Bandwidth; CMOS integrated circuits; Coplanar waveguides; Couplers; Frequency measurement; Microwave circuits; Radio frequency; Branch-line coupler; asymmetrical CPW T-structures; integrated passive device (IPD) technology;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (APMC), 2013 Asia-Pacific

Conference_Location

Seoul

Type

conf

DOI

10.1109/APMC.2013.6695118

Filename

6695118