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Single-layer capacitive feed for wideband probe-fed microstrip antenna elements

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3 Author(s)
Mayhew-Ridgers, G. ; Dept. of Electr., Univ. of Pretoria, South Africa ; Odendaal, J.W. ; Joubert, J.

In this paper, it is shown how a single-layer capacitive feeding mechanism, consisting of a small rectangular probe-fed patch, which is capacitively coupled to the radiating element, can be used to obtain wideband operation for probe-fed microstrip antennas on thick substrates. The main advantages of this feeding mechanism are that all the elements reside on a single layer and that it is very easy to fine-tune the input impedance. Calculated as well as measured results for rectangular, circular and annular-ring geometries are included.

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Antennas and Propagation, IEEE Transactions on  (Volume:51 ,  Issue: 6 )