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Bandwidth enhancement for dual-frequency microstrip antenna with conical radiation

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2 Author(s)
S. -J. Lin ; Nat. Changhua Univ. of Educ., Changhua ; J. -S. Row

A design for dual-frequency microstrip antennas with conical radiation patterns is studied. The dual-frequency operation is achieved by exciting two different resonant modes of the square microstrip patch antenna with four symmetrical shorting walls. Then, a method to enhance the impedance bandwidths of the dual-frequency antenna is proposed, and the experimental results show bandwidths are increased by 19 and 31% at the lower and higher operating frequencies, respectively. Simulation analyses are also performed to support the measured results.

Published in:

Electronics Letters  (Volume:44 ,  Issue: 1 )