Title :
Recent Developments in Broadband Directional Couplers on Microstrip
Author_Institution :
Philips Res. Labs., Eindhoven, Netherlands
Abstract :
Introduction of lumped elements in the microstrip itself proved-to be a rather simple way to overcome the difficulties encountered by achieving tight coupling (3 dB) and high directivity (>; 20 dB) for proximity couplers on plain microstrip. Three couplers were made as proof; two 3 dB proximity couplers: a distributed-lumped and an octave-flat lumped one, and a 8.34 dB decade-wide asymmetric coupler of the DuHamel & Armstrong type. It is evident that application of the new technique is not restricted to couplers.
Keywords :
lumped parameter networks; microstrip directional couplers; broadband directional couplers; decade-wide asymmetric coupler; distributed-lumped; lumped elements; octave-flat lumped one; plain microstrip; proximity couplers; Capacitance; Couplings; Directional couplers; Frequency; Inductance; Laboratories; Microstrip; Reflection; Strips; Transmission line theory;
Conference_Titel :
Microwave Symposium, 1972 IEEE GMTT International
Conference_Location :
Arlington Heights, IL
DOI :
10.1109/GMTT.1972.1123051
