LOG-PERIODIC ANTENNAS WITH MODULATED IMPEDANCE FEEDERS

被引：12

作者：

INGERSON, PG

MAYES, PE

机构：

[1] Antenna Laboratory, University of Illinois

[2] Antenna Laboratory, University of Illinois, Urbana, Ill.

[3] TRW Systems, Inc., Redondo Beach, Calif.

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 1968年 / AP16卷 / 06期

关键词：

D O I：

10.1109/TAP.1968.1139275

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：

The proper phasing of the active region of a log-periodic array can be obtained by means of a feeder without the conventional transposition of the wires. This is of practical importance for arrays of monopoles and slots where the transposition is not possible. However, the input impedance of such structures, when fed from a line with constant impedance, varies greatly with frequency. The impedance variation has been traced to reflections from a stop region between the antenna feed-point and the active region. By introducing a step modulation of the char acteristic impedance of the feedline, the reflections can be reduced and a stable impedance obtained. Copyright © 1969 by The Institute of Electrical and Electronics Engineers, Inc.

引用

页码：633 / &