A Modified Radiometric Method for Measuring Antenna Radiation Efficiency
McEwan, Neil J. Abidin, M.N.Z.
McEwan, Neil J.
Abidin, M.N.Z.
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2009-05-28
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Abstract
Radiation efficiency of antennas is shown to be measurable by a modified radiometric technique where the antenna's physical temperature is varied, rather than the noise temperature of its surroundings. The method is accurate, flexible and much more convenient for routine use. A means of avoiding errors caused by temperature-dependent antenna impedance is described. The accuracy of the method is verified by measuring the radiation efficiency of a horn antenna with a 3 dB attenuator to simulate a 50% efficient antenna, and by using microstrip patch antennas, whose measured efficiencies compared well with values computed from a transmission-line model.
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McEwan NJ, Abd-Alhameed R, Abidin MNZ (2003) A Modified Radiometric Method for Measuring Antenna Radiation Efficiency. IEEE Transactions on Antennas and Propagation. 51(8): 2099- 2105.
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