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Text File  |  1999-10-23  |  317b  |  13 lines
  1. An antenna that uses a directional coupler to measure power transmitted 
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  3. An antenna that sends and receives radio energy mainly in one direction
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  5. An antenna that cannot send and receive radio energy by skywave or skip propagation
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  7. An antenna that sends and receives radio energy equally well in all directions
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