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A study on the Enhancement of Gain and Axial Ratio Bandwidth of the Multilayer CP-DRA  

Lee, Ho-Sang (Gyeongsang National University, Dept. Electronic Engineering)
Jo, Dong-Ki (Gyeongsang National University, Dept. Electronic Engineering)
Jung, Young-Ho (Gyeongsang National University, Dept. Electronic Engineering)
Kim, Cheol-Bok (Gyeongsang National University, Dept. Electronic Engineering)
Son, Ho-Cheol (Gyeongsang National University, Dept. Electronic Engineering)
Lee, Mun-Soo (Engineering Research Institute, Gyeongsang National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.46, no.7, 2009 , pp. 52-60 More about this Journal
Abstract
In this pater, a CP-DRA(Circularly Polarized Dielectric Resonator Antenna) using cross-slot-feed is studied to enhance the gain and axial ratio bandwidth. First, a single layer CP-DRA is studied as a reference for comparison. Then a new type of multilayer CP-DRA is proposed to enhance the gain and axial ratio bandwidth. In consideration of the antenna gain enhancement, the spacing between the elements of the multilayer CP-DRA is examined through analysis of the radiation performance of a 2$\times$2 planar amy of DRAs with a spacing of 0.7$\lambda_0$ and 1.2$\lambda_0$ using CST Microwave Studio. The measured result shows that the gain and bandwidth of the multilayer structure is approximately twice that of the single layer one. In the case of the array antenna in which the spacing between multilayer CP-DRA element is 1.2$\lambda_0$, a grating lobe is reduced, in contrast to what we can expect from a conventional antenna array. The gain is 13.4dBi and axial ratio bandwidth is 0.8GHz.
Keywords
Dielectric Resonator Antenna(DRA); Multilayer DRA; Circular Polarization(CP); Array Antenna;
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