Title :
60 GHz ASK modulator using switchable FSS
Author :
Kiani, Ghaffer I. ; Bird, Trevor S. ; Ford, Kenneth L.
Author_Institution :
Inf. & Commun. Technol. Centre, CSIRO, Epping, NSW, Australia
Abstract :
A switchable frequency selective surface (FSS) designed to operate as a free space amplitude shift keying (ASK) modulator at 60 GHz is presented. The FSS is based on rectangular loop aperture geometry, with each unit cell having two PIN diodes across the aperture at 180 degree interval. This makes the FSS operate in only one polarization i.e. either TE or TM depending on the orientation of the incident electric field. To minimize the effect of bias line on the overall frequency response of the FSS, an orthogonal negative dc bias line, which is connected to the center of the FSS unit cell, has been placed on the rear surface of the dielectric substrate. Positive dc biasing is provided from the front side of the FSS structure. Theoretically, a transmission loss of about 21 dB can be achieved by switching PIN diodes to ON from OFF state. Preliminary theoretical results are described.
Keywords :
amplitude shift keying; frequency modulation; frequency selective surfaces; ASK modulator; dc bias line; dielectric substrate; free space amplitude shift keying; frequency 60 GHz; positive dc biasing; rectangular loop aperture geometry; switchable frequency selective surface; transmission loss; Amplitude shift keying; Apertures; Frequency selective surfaces; Integrated circuit modeling; Optical switches; PIN photodiodes;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2010 IEEE
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4244-4967-5
DOI :
10.1109/APS.2010.5562170