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On the role of substrate loss tangent in the cavity model theory of microstrip patch antennas

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4 Author(s)
Kai-Fong Lee ; Dept. of Electr. Eng., Toledo Univ., OH, USA ; S. R. Chebolu ; Wei Chen ; R. Q. Lee

The effective loss tangent (δeff) plays an important role in the improved cavity model of microstrip patch antennas. It is calculated using an iterative procedure. Results are presented here showing that the final value of δeff is quite sensitive to the value chosen at the start of the iterative process, i.e., the substrate loss tangent (tan δ). Since the input impedance depends on δeff, it is important to specify the value of tan δ in any comparison with experiment

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:42 ,  Issue: 1 )