Sporer, MichaelMichaelSporerWeigel, RobertRobertWeigelKölpin, AlexanderAlexanderKölpin2020-07-062020-07-062016-08-09IEEE MTT-S International Microwave Symposium Digest (2016-August): 7540286 (2016-08-09)http://hdl.handle.net/11420/6601This paper presents a reconfigurable focal plane array (FPA) for lens or reflector based antenna systems in the 24 GHz ISM band. The FPA consists of five equal uniformly-spaced antenna elements with switchable polarization, fabricated on a four layer substrate using conventional low-cost PCB technology. For compactness and increased bandwidth, the design is based on aperture-coupled patch radiators on top of the substrate, each embedded in a cavity in order to reduce mutual coupling. Feeding is done by means of two orthogonal H-shaped slots which are excited by microstrip transmission lines etched on the bottom layer. A discrete pin-diode single pole, double throw (SPDT) switch directly below the patch allows for polarization control and facilitates a compact element size of 10mm × 10mm including the cavity walls. Another discrete pin-diode SP5T switch allows the selection of one of the five FPA elements at a time.en0149-645x2016aperture couplingfocal plane arraypin-diode switchespolarization controlConference Paper10.1109/MWSYM.2016.7540286Other