An approach where polar curves are used to miniaturize hybrid couplers is presented. The design of such couplers can be done with the optimization of a few parameters using full-wave analysis software. The results show similar or better electrical performance for a rat-race and branch-line coupler with respectively a 75% and 50% size reduction.
Ferreira, Riaan; Joubert, Johan; Odendaal, J.W. (Johann Wilhelm)(Institute of Electrical and Electronics Engineers, 2017-01)
A low profile dual-circularly polarized printed ring-slot
antenna with a small footprint, which radiates above an open cavity
loaded with an artificial magnetic conducting reflector, is presented.
The feed network ...
Van der Merwe, Jacobus Stefanus(University of Pretoria, 2008-04-10)
The objective of the research is to design an electro-optic control for the Active Vertical Coupler-based Optical Cross-point Switch (OXS). The electronic control should be implemented on Printed Circuit Board (PCB) and ...