Kölpin, AlexanderAlexanderKölpinWinter, Sebastian M.Sebastian M.WinterWeigel, RobertRobertWeigel2020-07-152020-07-152007-06IEEE MTT-S International Microwave Symposium digest(): 4263997 1011-1014 (2007-06)http://hdl.handle.net/11420/6824In this paper a compact front-end of a six-port receiver is presented based on a multi-layer circuit topology. For higher frequencies the six-port receiver architecture offers a good alternative to common receiver concepts. One drawback is the occupied size of the microwave couplers used in the analog front-end depending normally directly on the wave length and is opposed to an implementation of the passive six-port structure on a MMIC, With the results of the investigations presented in this paper a reduction in size of the six-port's transmission line structure of about 79 % is achievable. The performance of the proposed multi-layer structure is compared to the common planar topology and shows only slight degradation.en0149-645x200710111014Circuit topologyMicrostrip couplersMicrowave receiverMultilayerPhase conversionConference Paper10.1109/MWSYM.2007.380227Other