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Cbaracterization of tbe properties of microwave device proves to be an .. senlial complemenl 10 Ibetbeoretical or simulaUon works. Tbus, Ibe .. tablishment of tool used for tbe cbaraclerization Is one of Ibeimportant steps in tbe experimeDtal sludy. In this paper, a test-fixture to cbaracterize tbe reflectivity aDdtraDsmissivity of microwave device is reported wbereby tbe refleelion and traDsmission properties caD beobtained under normal incidence using a specially designed paraUel plate waveguide (PPW) simulator.Tbis Is possible siDce tbis type of simulator is potentially \transmission response tbrougb tbe use of tbe available 3-dimension electromagnetic (3D EM) software.Tbe simulator Is designed numerically to work for 2.60 GHz to 3.95 GHz operation, witb waveguidetransducen type WGIO used for tbe wave exciter. After optimizing some parameten, tbe simulator witbplate widlb of 200 mm, plate separatioD of 75 mill, and taper lengtb of 100 mm is tbeD fabricated. Thiswas followed by tbe experimental measurement, taken to be compared witb tbe design result. Somecbaracterization of 3 GHz microwave devices including a sample of frequeDcy selective surfaces (FSS) aD-dmicrowave absorber is also demonstrated, from wbicb tbe results are tben compared witb tbe simulatelrones. |
