NDLI: Development of Low-Profile Patch and Semi-Circular SIW Cavity Hybrid Antennas

Content Provider	IEEE Xplore Digital Library
Author	Dashti, H. Neshati, M.H.
Copyright Year	1963
Abstract	Two low-profile hybrid antennas are presented. One of the structures provides linearly polarized (LP) wave and the other one produces circularly polarized (CP) radiated field. half-mode substrate integrated waveguide (HMSIW) technique is used to make a semi-circular cavity for reducing the antenna size. Using proximity effect, TM010 mode of a rectangular patch is excited by the HMSIW cavity. An inset microstrip line is used to excite the structure which leads to capability of planar circuit integration. The effects of the HMSIW cavity-backed antenna with and without patches are investigated. The simulated results show that adding the patch increases bandwidth and improves antenna gain. Both proposed hybrid antennas are made on a single-layer substrate using printed circuit board (PCB) process. Two prototypes of the proposed antennas are designed, simulated and fabricated. It is shown that broadband impedance bandwidth of 10% and maximum gain of 7.5 dBi is obtained for the LP antenna. In the case of CP antenna, axial ratio (AR) bandwidth is at least 1% with maximum gain of 6.8 dBi. The proposed hybrid antennas are low profile and offer attractive features such as high gain, low cross polarization level and high front-to-back ratio.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	4481
Ending Page	4488
Page Count	8
File Size	1851334
File Format	PDF
ISSN	0018926X
Volume Number	62
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cavity resonators Antennas Bandwidth Impedance Substrates Resonant frequency Antenna measurements substrate integrated waveguide (SIW) Cavity backed antenna hybrid antenna microstrip patch antenna
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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