Planar array designs and three-dimensional (3-D) high-density integration can degrade antenna performance due to feedline interference and coupling. To minimize this effect, a single source element with feedline is combined with a frequency selective surface (FSS) to form a Fabry-Perot Cavity antenna (FPCA) system. The FSS focusing of the antenna radiation also focuses the feedline energy, which can degrade the overall FPCA system radiation pattern. This letter presents a technique to reduce undesired feedline radiation enhanced by an FSS. Orientation-sensitive FSS designs are studied to minimize feedline electric field concentration above the FSS. Feedline radiation focusing above the FSS can be minimized from 4.95 to -2.4 dBi in the far field.
Bibliographical noteFunding Information:
Manuscript received November 6, 2017; revised December 13, 2017 and January 31, 2018; accepted February 21, 2018. Date of publication March 12, 2018; date of current version May 3, 2018. This work was supported by the National Science Foundation under Grant 1202329. (Corresponding author: Chanjoon Lee.) The authors are with the Electrical and Computer Engineering Department, University of Minnesota, Minneapolis, MN 55455 USA (e-mail:, firstname.lastname@example.org; email@example.com; firstname.lastname@example.org). Digital Object Identifier 10.1109/LAWP.2018.2815343 Fig. 1. (a) Structure of the open air-cavity FPCA system. (b) Electric field distribution above FSS in the FPCA system and circuit model of the FPCA system.
© 2018 IEEE.
- Antenna arrays
- Fabry-Perot cavities (FPC)
- Frequency selective surface (FSS)
- Interference suppression