Title :
Wide-band microstrip and coplanar-type 3 dB directional couplers with quasi-ideal sections of coupled lines
Author :
Sachse, Krzysztof ; Sawicki, Andrzej ; Jaworski, Grzegorz
Author_Institution :
Inst. of Telecommun. & Acoust., Wroclaw Univ., Poland
Abstract :
Wide-band 3 dB couplers with two different microstrip quasi-symmetric tightly coupled-line sections have been designed, fabricated and measured. The calculated frequency-dependent characteristics of these couplers are compared with measured responses. It is shown that a multi-section coupler with asymmetric coupled lines as the centre section can compose an optimum 90° coupler, if correcting lengths of transmission line are added. A coplanar-type MMIC version of this wide-band 3 dB coupler is proposed
Keywords :
MMIC; UHF couplers; coplanar waveguide components; coupled transmission lines; directional couplers; microstrip directional couplers; 3 dB directional couplers; asymmetric coupled lines; centre section; coplanar-type MMIC version; coplanar-type couplers; coupled line sections; frequency-dependent characteristics; microstrip couplers; multisection coupler; optimum 90 degree coupler; quasi-ideal sections; quasi-symmetric tightly coupled-line sections; wideband directional couplers; Coplanar transmission lines; Coupling circuits; Dielectric substrates; Directional couplers; Distributed parameter circuits; Frequency measurement; Microstrip; Strips; Transmission line measurements; Wideband;
Conference_Titel :
Microwaves and Radar, 1998. MIKON '98., 12th International Conference on
Conference_Location :
Krakow
Print_ISBN :
83-906662-0-0
DOI :
10.1109/MIKON.1998.740931
