Optimum Functions for Radial Wires of Monopole Antennas with Arbitrary Elevation Angles

被引：2

作者：

Fartookzadeh, Mahdi ^{[1
]}

Mohseni Armaki, Seyyed Hossein ^{[1
]}

Razavi, Seyyed Mohamad Javad ^{[1
]}

Rashed-Mohassel, Jalil ^{[2
]}

机构：

[1] Malek Ashtar Univ, Dept Elect & Elect Engn, POB 1774-15875, Tehran, Iran

[2] Univ Tehran, Ctr Excellence Appl Electromagnet Syst, Sch ECE, Coll Engn, POB 14395-515, Tehran, Iran

来源：

RADIOENGINEERING | 2016年 / 25卷 / 01期

关键词：

Compensation theorem; antenna ground plane; antenna impedance; HF propagation; monopole antenna; radial wires; LOW-FREQUENCY; INPUT IMPEDANCE; GROUND PLANES; EARTH; PROPAGATION; EFFICIENCY; PROXIMITY; ELEMENTS; SURFACE;

D O I：

10.13164/re.2016.0053

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Monopole antennas on the earth usually use ground screen with simple radial wires to improve their radiation performance. The number of radials N is usually considered a constant in the screen. This paper studies the effect of changing N and considering it as a function of distance rho from the monopole using a simple and yet a fast method. The function N(rho) is optimized for dfferent beam angles of an HF monopole antenna. The theoretical functions are converted to practical functions to be formed using meandered lines. Practicable calculated results are validated by method of moments. Furthermore it is shown that for low angle radiation a constant N(rho) with optimized radius of the ground screen is the best choice. The results can be used for higher frequencies, i.e. VHF and UHF frequency bands as well.

引用

页码：53 / 60

页数：8