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A power and efficiency measurement technique for active patch antennas

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3 Author(s)
Elkhazmi, E.A. ; Dept. of Electr. & Electron. Eng., Bradford Univ., UK ; McEwan, N.J. ; Ali, N.T.

In this paper, the power input to the radiating element of an active microstrip patch antenna is measured using a small sensing patch, which is weakly coupled to a radiating edge. Combined with an estimate of patch radiation efficiency, this also yields a measurement of total radiated power. The method has advantages of convenience, insensitivity to room reflections, and a weakly frequency-dependent calibration factor

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:48 ,  Issue: 5 )