Title :
Accurate design of microstrip directional couplers with capacitive compensation
Author_Institution :
Motorola Inc., Scottsdale, AZ, USA
Abstract :
An accurate design is presented for microstrip directional couplers with high directivity using capacitive compensation. The method utilizes symmetry analysis and equivalency principals to develop closed-form solutions of the compensating capacitance and a new odd mode characteristics impedance necessary to realize an ideal microstrip directional coupler. The design approach is valid for any degree of coupling, thereby overcoming limitations of previous approaches to this design concept.<>
Keywords :
directional couplers; strip line components; capacitive compensation; closed-form solutions; directivity; equivalency principals; microstrip directional couplers; odd mode characteristics impedance; symmetry analysis; Capacitance; Closed-form solution; Coupling circuits; Dielectric substrates; Directional couplers; Distributed parameter circuits; Equations; Impedance; Microstrip; Transmission line matrix methods;
Conference_Titel :
Microwave Symposium Digest, 1990., IEEE MTT-S International
Conference_Location :
Dallas, TX
DOI :
10.1109/MWSYM.1990.99647
