Complex wire grid antennas: determining the optimal source location using characteristic mode analysis

Dang, Tuan Phuong; Alhaj Hasan, Adnan; Gazizov, Talgat Rashitovich

doi:10.24200/sci.2025.66158.9884

Complex wire grid antennas: determining the optimal source location using characteristic mode analysis

Articles in Press

Document Type : Research Article

Authors

Tuan Phuong Dang

Adnan Alhaj Hasan

Talgat Rashitovich Gazizov

Department of Television and Control, Tomsk State University of Control Systems and Radioelectronics, 634050 Tomsk, Russia

10.24200/sci.2025.66158.9884

Abstract

Wide use of radioelectronic systems requires more complex antennas. Determining the location of the excitation source (feed) in a complex antenna structure plays an important role and depends on many factors. Currently, this choice is often made based on the designer experience and requires careful modeling and analysis. One of the popular methods used in such programs is the characteristic mode analysis (CMA). However, previous CMA-based studies that determine the source location often considered the excitation of low-order modes. In this paper, we present an algorithm to determine the optimal source location in a wire grid antenna that excites all modes reasonably well. This algorithm is based on the product of characteristic current and modal significance to obtain the maximum possible current distribution along the an-tenna wires and radiation field. The proposed algorithm is tested here on the example of dipole and conical spiral structures in the frequency ranges of 0.1–1 GHz and 9–11 GHz, respectively, and verified by the method of moments.

Keywords

characteristic mode analysis

method of moments

excitation source

wire grid

antennas

Subjects