Title :
Improvements to the design of the 0-180/spl deg/ rat race coupler and its application to the design of balanced mixers with high LO to RF isolation
Author_Institution :
SEMELAB Plc, Lutterworth, UK
Abstract :
An improved rat-race coupler is described which, in the ideal case, has a pair of ports with infinite isolation between them at all frequencies. This improved rat-race coupler is useful in such applications as the design of balanced mixers with high LO to RF isolation.
Keywords :
microwave isolators; microwave mixers; strip line couplers; two-port networks; balanced mixers; high LO to RF isolation; pair of ports; quarter-wave shunt short-circuit stubs; rat race coupler design; series open-circuit stub; stripline hybrid ring; Bandwidth; Clocks; Coupling circuits; Difference equations; Distributed parameter circuits; Impedance; Narrowband; Power transmission lines; Programmable control; Radio frequency;
Conference_Titel :
Microwave Symposium Digest, 1997., IEEE MTT-S International
Conference_Location :
Denver, CO, USA
Print_ISBN :
0-7803-3814-6
DOI :
10.1109/MWSYM.1997.602898
