Publication: Compact printed ultra-wideband monopole antenna with dual band-notched characteristic
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Date
2009-04-01
Authors
Tan, Chek Ling
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Abstract
A compact printed ultra-wideband (UWB) monopole antenna with dual
band-notched characteristic is presented. The main proposed of this project is to
avoid interference between the UWB and the existing WLAN system by having
the band-notched characteristic. The dual band-notched characteristic is
achieved by etching a complementary split ring resonator (CSRR) inside the
patch of the monopole antenna. The project is designed and simulated by using
the CST Microwave Studio. After completing the simulation part, the final design
will be fabricated at the PCB laboratory and the characteristics of the antenna
such as S parameter and radiation pattern were measured. The simulation and
measurement result will be analyzed and compared. Based on the software
simulation result, at the resonant frequency of 5 GHz, the designed antenna has
an impedance bandwidth from 2.51 GHz to 5.96 GHz except two reject
frequencies of 3.094-3.2247 GHz and 4.3375-4.7928 GHz while the bandwidth
for the measurement is 3.04 GHz which is 11.8% different. The 3D far-field
shows the radiation pattern of the designed antenna is omnidirectional. Besides
that, the gain for the simulation and measurement are 3.192 dB and 5.73 dB,
respectively. In overall, most of the design specifications are met