Title :
A novel technique for enhancing the directivity of microstrip patch antennas using an EBG superstrate
Author :
Yoo, Kyungho ; Mittra, Raj ; Farahat, Nader
Author_Institution :
Electromagn. Commun. Lab., Pennsylvania State Univ., University Park, PA
Abstract :
This paper presents a novel and systematic approach for enhancing the directivity of an antenna/EBG composite, comprising of a microstrip patch antenna covered by an FSS superstrate. The method is based on the initial simulation of the composite operating in the receive mode, mapping the field distribution in the Fabry-Perot type cavity region formed by the superstrate and the ground plane. Additionally, we correlate the results for the frequency response of an associated two-layer structure - formed by the superstrate and its image through the ground plane - by using the Finite Difference Time Domain (FDTD) method. Furthermore, the field distributions inside the cavity for oblique incidence are investigated, again when operating in the receive mode, to relate the angular response with the antenna pattern.
Keywords :
Fabry-Perot resonators; finite difference time-domain analysis; frequency selective surfaces; microstrip antennas; EBG composite; FDTD method; FSS superstrate; Fabry-Perot type cavity region; field distribution; finite difference time domain method; frequency selective surfaces; microstrip patch antennas; Fabry-Perot; Finite difference methods; Frequency response; Frequency selective surfaces; Metamaterials; Microstrip antennas; Patch antennas; Periodic structures; Receiving antennas; Time domain analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2041-4
Electronic_ISBN :
978-1-4244-2042-1
DOI :
10.1109/APS.2008.4620041
