Summary
International Symposium on Antennas and Propagation
2010
Session Number:3TB2
Session:
Number:3TB2-1
Design of Dual-band E-shaped Patch Antennas by Using the Multi-Conductor Transmission Line Mode Theory
Keisuke Noguchi, Harish Rajagopalan, Yahya Rahmat-Samii,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
Microstrip patch antennas are extremely popular in wireless systems due to their lowprofile structure. They form attractive solutions for various applications like handheld devices and satellite communications. Some of the inherent advantages of these antennas are light weight, low profile nature, low fabrication cost, mechanically robust, conformality to host surface and easily integration with microwave integrated circuits (MICs) [1]. Some of the disadvantages of these antennas include narrow bandwidth, low efficiency and surface wave excitation [1]. Conventional approaches to increase the bandwidth of a microstrip patch include use of stacked patches or using parasitic elements. Due to the size constraints and the need for single-patch design solutions in wireless systems, the E-shaped patch antenna presents an attractive single-patch dual-band design [2]. Theoretical analysis gives great insight into the design of these E-shaped patch antennas. This paper proposes a new circuit model for an E-shaped patch antenna for dual-band operation using the multi-conductor transmission line mode theory [3]. From mode theory, it can be assumed that the Eshaped patch antenna forms three-conductor transmission line system and thus has three transmission line modes. Based on these three transmission line modes, an equivalent circuit model is developed. The E-shaped patch antenna is analyzed for dual-band operation. Finally, theoretical impedance characteristics obtained from circuit model are compared with those obtained from full wave 3D electromagnetic analysis.