Title :
A very small, low-loss MMIC rat-race hybrid using elevated coplanar waveguides
Author :
Kamitsuna, Hideki
Author_Institution :
ATR Opt. & Radio Commun. Res. Lab., Kyoto, Japan
Abstract :
A very small, low-loss monolithic microwave IC (MMIC) rat-race hybrid using elevated coplanar waveguides is proposed. A 15-GHz-band rat-race hybrid was designed and fabricated in a 0.50 mm*0.55 mm chip area. The proposed hybrid requires less than half the area used when constructing miniaturized MMIC hybrids from thin-film microstrip lines. Furthermore, coupling loss of the proposed hybrid is reduced by approximately 2 dB in comparison to that of previously reported ones.<>
Keywords :
MMIC; strip line components; 15 GHz; CPW; MMIC; SHF; coupling loss; elevated coplanar waveguides; low loss hybrid; monolithic microwave IC; rat-race hybrid; Conductors; Coplanar transmission lines; Coplanar waveguides; Gallium arsenide; Impedance; Insertion loss; MMICs; Microstrip; Optical waveguides; Substrates;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
