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Semi doughnut pattern Square Loop Antenna for vehicular and wireless applications

Pal, A and Mehta, A and Mirshekar-Syahkal, D and Nakano, H (2011) Semi doughnut pattern Square Loop Antenna for vehicular and wireless applications. In: UNSPECIFIED, ? - ?.

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Abstract

Recently, a planar Square Loop Antenna (SLA) with four ports over a Hybrid High Impedance (HHIS) surface was reported which can steer its beam in four different quadrants in front of antenna. This is achieved by exciting one of the four input ports of the antenna and open circuiting the other three. In this work it is shown that the same SLA can be used to generate a semi-doughnut radiation pattern if all of its four ports are excited simultaneously with a signal of the same phase and amplitude. The SLA over HHIS is designed to operate at a frequency of 5.2 GHz and has an impedance bandwidth of 780 MHz for 50 input impedance. The semi doughnut pattern has a maximum directivity of 4.3 dBi over a wide radiation pattern bandwidth of 1 GHz, covering the frequency range from 4.4 GHz to 5.4 GHz. © 2011 IEEE.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Published proceedings: IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions: Faculty of Science and Health > Computer Science and Electronic Engineering, School of
Depositing User: Jim Jamieson
Date Deposited: 29 Aug 2014 08:58
Last Modified: 23 Jan 2019 02:15
URI: http://repository.essex.ac.uk/id/eprint/9948

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