E-band CPW ring hybrid using an overlapped coupling structure

Author

Lim, Jong-Sik ; Jeong, Sunyoung ; Lee, Young-Taek ; Kim, Sungwon ; Kwang-Seok Seo ; Nam, Sangwook

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., South Korea

Volume

1

fYear

2003

fDate

7-9 Oct. 2003

Firstpage

327

Abstract

A novel E-band coplanar waveguide (CPW) 180° ring hybrid coupler is presented. The proposed ring hybrid adopts a vertically overlapped coupling structure (OCS) having the length of 0.25λ_g to replace the conventional 0.75λ_g line or previous short-ended coupling section on the same plane. The OCS is realized by placing two metal layers to face them with each other up and down three-dimensionally. The OCS permits the ring hybrid to have a small size and wideband operation due to the broadside coupling. The proposed 180° ring hybrid coupler is fabricated using MMIC technology. The predicted and measured performances show that the operating frequency of the ring hybrid covers E- to W-band (60 ∼ 110GHz) with a good agreement preserved.

Keywords

MMIC; S-parameters; coplanar waveguide components; directional couplers; 60 to 110 GHz; E-band coplanar waveguide coupler; MMIC technology; S-parameters; broadside coupling; directional coupler; phase difference; ring hybrid coupler; small size; vertically overlapped coupling structure; wideband operation; Computer science; Coplanar waveguides; Coupling circuits; Electromagnetic waveguides; Frequency measurement; Inverters; MMICs; Microstrip; Performance evaluation; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2003. 33rd European

Print_ISBN

1-58053-834-7

Type

conf

DOI

10.1109/EUMC.2003.1262285

Filename

1262285