A novel wide-band polygonal slot circular antenna using the theory of characteristic modes

Issue title: Special Section: Fuzzy Logic for Analysis of Clinical Diagnosis and Decision-Making in Health Care

Article type: Research Article

Authors: Xiao-Lan, Liu^{a; *} | Gui-Zhen, Lu^b | Jun-Liang, Zhang^a

Affiliations: [a] Hengshui University, Hengshui, China | [b] Communication University of China, Beijing, China

Correspondence: [*] Corresponding author. Liu Xiao-Lan, Hengshui University, Hengshui, 053000, China. E-mail: shuiweijuzi@163.com.

Abstract: Theory of Characteristic Mode(TCM) has become a research hotspot in antenna design. The development of computational electromagnetic makes it possible to solve the eigenmode of microstrip antenna with arbitrary shape. In this paper, TCM with radiation boundary conditions is proposed to solve the input impedance of the antenna, and TCM based on differential equations is applied to the design of the circular wide-band wearable antenna with polygonal slot. By analyzing the radiation characteristics of different modes of the antenna, the optimal feeding place is selected to excite the desired mode by the normalized electric field distribution of different modes, and then the wide-band characteristics are obtained. Experiments show that the circular wide-band wearable antenna with polygonal slot presented in this paper has good performance with bandwidth enough to covers (5.725GHz–5.85 GHz) frequency band and certain flexural resistance from a certain angle for wearable intelligent equipment applications.

Keywords: Wearable antenna, TCM, feeding place, wide-band

DOI: 10.3233/JIFS-179405

Journal: Journal of Intelligent & Fuzzy Systems, vol. 38, no. 1, pp. 303-309, 2020