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TRANSMITTING ARRAYS FOR LOW-POWER RELAY STATIONS: arrays of u. h. f. log-periodic aerials

机译:为低功率中继站传输阵列:你的阵列。 H。 F。对数周期天线

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摘要

Log-periodic aerials are considered for use as transmitting arrays at low-power u.h.f. relay stations. The movement of the aerials' phase-centre with frequency requires careful positioning of aerials in an array to preserve radiation pattern bandwidth. The aerials are mounted on arms up to 0.7 m long fixed to a cantilever pole by friction clamps. Measured horizontal and vertical radiation patterns of typical aerial installations are presented and from these their gain is computed. The reflection coefficient of an aerial array should present no problems with modern transposes. The radiation pattern performance can be predicted satisfactorily for planning purposes.

著录项

  • 作者

    J. L. Riley;

  • 作者单位
  • 年度 1975
  • 页码 1-15
  • 总页数 15
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工业技术;
  • 关键词

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