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Low-power method of adjustment of medium-wave directional antennas

Low-power method of adjustment of medium-wave directional antennas

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A new simple method of measuring the operating impedances and adjusting medium-wave directive arrays is presented. The desired current ratios and phases in radiating towers are set up by using conventional pentode amplifiers and wide-range phase shifters. The operating input impedances can measured by means of an operating impedance bridge, or by a voltmeter method which is described in more detail. Once the operating impedances are known, the dummy loads can be used in final matching of the high-power phasor system.

References

    1. 1)
      • J.V. Surutka , B.D. Popović . Improved method of adjustment of medium-wave directional-antenna systems. Proc. IEE , 349 - 351
    2. 2)
      • V.M. Ray . (1966) , Broadcast antenna systems handbook.
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