Multi-Layer Dielectric Cavity Antennas with Extended Aperture Height

Kook Joo LEE  Moonil KIM  Jung Aun LEE  Sanggeun JEON  

IEICE TRANSACTIONS on Communications   Vol.E94-B   No.2   pp.573-575
Publication Date: 2011/02/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.573
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Antennas and Propagation
cavity antenna,  dielectric resonator,  multi-layer substrate,  

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A dominant-mode rectangular cavity antenna design yielding an improved bandwidth is experimentally verified. Simple field theories indicate that extending the aperture height should increase the antenna bandwidth without shifting the operation frequency. Antenna samples built from a 4.4 dielectric constant material produce 3-dB efficiency bandwidths of 15 and 23 percent for the respective cavity height-to-width ratios of 0.5 and 0.75 at 7 GHz.