A Log - Periodic HF Antenna System.
DEPARTMENT OF THE ARMY WASHINGTON DC
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A plurality of dual feed half square wave antenna element each of U-shaped configuration are arranged in a log-periodic structure. The antenna elements are feed at the current loops i.e., at the corners of the U-shaped antenna elements. A dual inphase feed produces vertical polarization signals of low angle radiation, and a dual antiphase feed produces horizontal polarization signals of high angle radiation.
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