SURFACE WAVES AND MODE SELECTION ON MULTIELEMENT SPIRAL ANTENNAS

被引：7

作者：

CHEO, BR

RUMSEY, VH

机构：

[1] Department of Electrical Engineering, New York University, Bronx, 10453, NY

[2] Department of Applied Electrophysics, University of Calif. at San Diego, Formerly at Univ. of Calif., Berkeley, 92110, CA

来源：

RADIO SCIENCE | 1968年 / 3卷 / 03期

关键词：

D O I：

10.1002/rds196833267

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The solution of Maxwell's equations for the idealized sheet of spiral antennas has been extended to a cos nφ input excitation. At large distances the current density is the combination of a circularly polarized surface wave that vanes as exp (-jnφ) and the frequency independent current distribution previouslr worked out. The frequency independent component is almost entirely in the exp (jnφ) mode. Half the input power goes into the exp (jnφ) radiation pattern, and almost half goes into the surface wave. This explains the remarkable mode selection properties of multielement spiral antennas that were observed a few years ago. © Copyright 1968 by the American Geophysical Union.

引用

页码：267 / &