Multilayer MMIC broad-side coupler with a symmetric structure

Author

Okazaki, H. ; Hirota, Tetsuo

Author_Institution

NTT Wireless Syst. Labs., Kanagawa, Japan

Volume

7

Issue

6

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

145

Lastpage

146

Abstract

A multilayer monolithic microwave integrated circuit (MMIC) broad-side coupler that has a symmetric structure has been fabricated and demonstrated. To enable the coupler area to be reduced, the width of the coupled lines in the fabricated coupler is made as narrow as 15 μm by using a meander-like configuration. The coupled lines are 2.28-mm long and effectively laid out in a small area of 0.9 mm×0.12 mm. The device works well and has good performance at frequencies between 10-17.5 GHz, with coupling loss of 4.2/spl plusmn/0.4 dB and return loss of better than 20 dB. This newly developed coupler offers advantages of simple symmetric design and small circuit area.

Keywords

MMIC; losses; power combiners; waveguide couplers; 10 to 17.5 GHz; 15 micron; 2.28 mm; 3.8 to 4.6 dB; MMIC broad-side coupler; circuit area; coupled lines; coupler area; coupling loss; meander-like configuration; multilayer MMIC; return loss; symmetric design; symmetric structure; Conductive films; Conductors; Coupling circuits; Frequency; MMICs; Microwave integrated circuits; Monolithic integrated circuits; Nonhomogeneous media; Polyimides; Strips;

fLanguage

English

Journal_Title

Microwave and Guided Wave Letters, IEEE

Publisher

ieee

ISSN

1051-8207

Type

jour

DOI

10.1109/75.585192

Filename

585192