Efficient analysis of L‐probe coupled patch antenna arrays mounted on a finite conducting cylinder

Abstract

The radiation pattern of an L‐probe coupled patch‐antenna array mounted on a finite conducting cylinder is accurately and efficiently computed by the electric‐field integral equation (EFIE) in conjunction with the method of moments (MoM) and Galerkin's testing procedure. The effects of different dimensions of the cylinder on the radiation characteristics are studied, including beamwidth, sidelobe, and backlobe. The results are useful for designing wideband smart‐antenna arrays for future mobile‐communication systems. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 41: 403–407, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20153

The Singularity Problem at the Wire/Surface Junction Region for Antenna and Arrays With Bodies of Revolution

“…As the geometry is designed in streamline, it has good air-dynamics characteristics. Research shows that the curvature radius of the cylinder has an effect on the radiation pattern [1,2]. As the mobile communication is prospering with each passing day, the antennas and array with the body of revolution have been widely applied to mobile communication systems due to their advantages, for example, when applied to a base station, compared with the plane antenna, the antennas and array with the body of revolution can lead to a easier access to the communication smart antenna.…”

“…But the efficiency and accuracy of computation results are hindered because of the singularity that appears in impedance matrix elements. When it comes to the singularity problem of the impedance matrix elements for the revolution body and wire antenna in MOM, there are a lot of literature report [1][2][3][4][5][6][7][8][9], but there is little information considering the singularity of the computation of self-impedance at the junction region between wire antenna and cylinder surface. In this paper, a rigorous method is firstly introduced to extract the singularity of the Greens function appearing within the integrands of the self-impedance element at the junction region between wire antenna and cylindrical surface, and the effect of the size of the junction region on the cylinder surface on the self-impedance of the attachment point is analysed.…”