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Multi-band modified fork-shaped microstrip monopole antenna with ground plane including dual-triangle portion

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2 Author(s)
Go, H.-C. ; R&D Center, Hankook Antenna Co. Ltd., Bucheon, South Korea ; Jang, Y.-W.

A modified fork-shaped microstrip monopole antenna with the ground plane including a dual-triangle portion is studied experimentally to obtain a large bandwidth and a multi-band characteristic. In this case, the ground plane including a dual-triangle portion leads to improving the impedance matching for a lower band. Although the use of a high relative permittivity (εr=4.3) substrate usually restricts the operation bandwidth, the radiation resistance also was a low value. The 2.0 VSWR impedance bandwidth is 29.8% (731-987 MHz) for a lower band, and 90.2% (1498-3080 MHz) for a higher band operation. This single-layer microstrip monopole antenna also retains a low and a thin profile characteristic.

Published in:

Electronics Letters  (Volume:40 ,  Issue: 10 )