期刊名称：International Journal on Electrical Engineering and Informatics
印刷版ISSN：2085-6830
出版年度：2009
卷号：1
期号：1
出版社：School of Electrical Engineering and Informatics
摘要：In this paper, a new means for characterization of switchable substrateless frequency selective surfaces (FSS) was demo nstrated with numerical and experimental approaches. The diodes model loaded active doubly periodic flat strip FSS acts as a dynamic screen, in which its surface reflectivity and transmittivity can be switched alternately and tuned through d.c. bias voltage control. The properties of FSS layer are characterized using a specially designed parallel plate waveguide (PPW) simulator that permits normal incidence excitation of the FSS under test and the responses are found between 3 to 5 GHz. It is shown that by means of d.c. bias control, the screen can be utilized in, (a) transmission mode as a dual band electromagnetic shutter, or, (b) reflection mode, as an amplitude shift keying (ASK) spatial modulator or dual band reflection canceller. In addition a hybrid de-embedding technique is employed to remove the influence the PPW simulator and reveal the true property of substrateless FSS. Typical experimental results are presented and validated against a new 3D electromagnetic (EM) modeling led de-embedding method for the co mposite FSS layer and PPW structure.
