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Design and Analysis of a Low-Profile and Broadband Microstrip Monopolar Patch Antenna

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5 Author(s)
Juhua Liu ; State Key Lab. of Millimeter Waves, City Univ. of Hong Kong, Kowloon, China ; Quan Xue ; Hang Wong ; Hau Wah Lai
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A new microstrip monopolar patch antenna is proposed and analyzed. The antenna has a wide bandwidth and a monopole like radiation pattern. Such antenna is constructed on a circular patch antenna that is shorted concentrically with a set of conductive vias. The antenna is analyzed using a cavity model. The cavity model analysis not only distinguishes each resonating mode and gives a physical insight into each mode of the antenna, but also provides a guideline to design a broadband monopolar patch antenna that utilizes two modes (TM01 and TM02 modes). Both modes provide a monopole like radiation pattern. The proposed antenna has a simple structure with a low profile of 0.024 wavelengths, and yields a wide impedance bandwidth of 18% and a maximum gain of 6 dBi.

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Antennas and Propagation, IEEE Transactions on  (Volume:61 ,  Issue: 1 )