Design of a wideband hexagonal monopole antenna with L-slot using characteristic mode analysis
INTERNATIONAL JOURNAL OF ELECTRONICS(2021)
摘要
This communication presents the design of an asymmetrical hexagonal-shaped wideband antenna based on Characteristic Mode Analysis (CMA). An L-shaped slot is used to change the distribution of mode surface currents. Current modes and characteristic fields of the desired modes are studied to improve bandwidth. A simple 50 omega microstrip line is used to excite the selected modes and obtain wideband impedance matching. The antenna is printed on a low-cost FR4 substrate with a size of 30 mm x 29 mm x 1.6 mm. The design approach is experimentally validated through fabricated prototype antenna. It exhibits impedance bandwidth of 110.22% from 2.7 to 9.33 GHz, and thus covers most wireless systems, such as WPAN, WiMax, WLAN, RFID and C-band.
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关键词
Characteristic modes,l-shaped slot,monopole antenna,surface currents,wideband
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