Equivalent circuit for antenna-cavity coupling in wheeler's cap technique

被引：2

作者：

Huang, YQ ^{[1
]}

Narayanan, RM

Kadambi, GR

机构：

[1] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA

[2] Tulane Univ, Dept Elect & Comp Engn, New Orleans, LA 70118 USA

[3] Centur Wireless Technol Inc, Lincoln, NE USA

来源：

ELECTROMAGNETICS | 2005年 / 25卷 / 02期

关键词：

equivalent circuit; coupling resistance; Wheeler method; antenna efficiency; full wave analysis; loss resistance;

D O I：

10.1080/02726340590910084

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：

An equivalent circuit is derived for an antenna coupled to a shielding cavity via field analysis. The input impedance of the antenna inside the cavity is then studied theoretically and experimentally. It is shown that the input resistance of the antenna shielded by the cavity is not merely the loss resistance, but is actually the sum of the antenna loss resistance and the coupling resistance between the antenna and cavity. This coupling effect is demonstrated quantitatively by numerical computations for dipole antennas. A method is proposed to avoid the antenna-cavity antiresonance in the measurement of loss resistance of the antenna.

引用

页码：115 / 131

页数：17

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