Modeling printed monopole antenna with coplanar ground-plane by gaussian filter model analysis

Article type: Research Article

Authors: Peng, Chia-Mei^a | Chen, I-Fong^{b; *}

Affiliations: [a] Department of Electronic Engineering, Jinwen University of Science and Technology, Taipei, Taiwan | [b] Institute of Computer and Communication Engineering, Jinwen University of Science and Technology, Taipei, Taiwan

Correspondence: [*] Corresponding author: I-Fong Chen, 23154 No.99, An-Chung Road, Hsin-Tien City, Taipei, Taiwan. E-mail: ex0206@just.edu.tw

Abstract: Based on the Gaussian Filter Model (GFM), an equivalent circuit model that considers the effect of a finite-sized ground plane is presented to estimate the impedance bandwidth of typical printed monopole antenna geometry. The ground-plane is commonly regarded as a low impedance path for returning currents with constant potential across its area. In fact, the finite-size ground-plane of a PCB (Printed circuit board) is not a perfect-ground, it has significant reactance. Therefore, the result of printed ground-plane versus monopole antenna should be regarded as an additional planar radiator rather than a normal ground-plane. The quantitative values of inductance and capacitance of the printed monopole antenna with coplanar ground-plane are addressed thoroughly in this paper. Measured and Ansoft HFSS simulation results are presented to confirm the results obtained using GFM.

Keywords: Gaussian filter model, finite-sized ground plane, printed monopole antenna, finite-sized ground plane, returning currents

DOI: 10.3233/JAE-2011-1363

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 36, no. 3, pp. 243-251, 2011