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  1. fbooth

    How do I measure/calculate antenna isolation?

    I want to thank everyone for their help. I found the calculation part of what I was looking for in Richard C. Johnson, Antenna Engineering Handbook, 3rd edition, pp. 26-38 to 26-40.
  2. fbooth

    How do I measure/calculate antenna isolation?

    About the antennas: Transmit - pyramidal horn Receive - spiral
  3. fbooth

    How do I measure/calculate antenna isolation?

    Perhaps I should clarify the situation. The transmit and receive antennas are on the same platform, with the boresight of each in the same parallel direction mounted on a vertical metal mast - transmit above receive - separated by a distance of x units. The receive is always "on". The...
  4. fbooth

    How do I measure/calculate antenna isolation?

    I have two antennas - one transmit the other receive. They both work in the same band (GHz). The beamwidths for each antenna are known for all frequencies. The beams point parallel the same direction. How may I calculated the isolation for a given displacement in meters? Then, can someone...
  5. fbooth

    In microwave antenna far-field patt

    Thanks VB1BLL, Your insight is correct. The problem is with low directional antennas which illuminate part of the aircraft. Since I am illuminating, say the wing tips, I believe that the wing tips sould be included in the aperture number. For example, an antenna having a stand-alone...
  6. fbooth

    In microwave antenna far-field patt

    In microwave antenna far-field patterns one uses the general equation: R=>2(D^2)/lambda where: D is the antenna aperture and lambda represents the wave-length. This is fine except for antennas mounted on platforms, i.e. aircraft. I have learned that the effective aperture of an antenna is...

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