Hybrid Zeroth-Order Resonance Patch Antenna With Broad E-Plane Beamwidth

• Published in: IEEE transactions on antennas and propagation 2013-01, Vol.61 (1), p.19-25
• Main Authors: KO, Seung-Tae, LEE, Jeong-Hae
• Format: Article
• Language: English
• Subjects: Antenna feeds; Antenna measurements; Antenna radiation patterns; Antennas; Applied sciences; Equivalent circuits; Exact sciences and technology; Half power beamwidth (HPBW); hybrid; metamaterial; Patch antennas; Radiocommunications; Resonant frequency; Telecommunications; Telecommunications and information theory; zeroth-order resonance (ZOR) mode; {\rm TM}_{010} mode
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2012.2220315

In this paper, a hybrid zeroth-order resonance (ZOR) patch antenna with a broad E -plane beamwidth is presented. In order to obtain the broad beamwidth of an antenna, a TM 010 (λ 0 /2) mode and a ZOR mode are combined. By dividing the incident power to two modes, the E -plane beamwidth of a TM 010 mode can simply be controlled. To generate the TM 010 mode and the ZOR mode, simultaneously, the mushroom antenna is inserted in a rectangular patch antenna with an etched rectangular hole and a single feed is employed between two radiators. The incident power to each antenna can be controlled by using the gap of a feed. Thus, the optimum incident power ratio having the broadest E -plane half power beamwidth (HPBW) is obtained. As a result, the E -plane HPBW of the proposed antenna is measured as 115° and broadened by 53%, compared with that of the conventional rectangular patch antenna. Moreover, the bandwidth and the efficiency of the antenna are measured to be 3.3% and 92%, respectively. Finally, the measured results show good agreements with the simulated ones.