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As is well known, more pulse energy is distributed in the relatively low frequency range than that in the high frequency range for a short pulse excitation. However, it's difficult to obtain a well low-frequency performance for the relatively limited spatial volume of antenna. Besides, the conventional knife-shape TEM horn antenna introduces some fluctuations in the main lobe radiation pattern over...
A microstrip patch antenna with a spur-line is proposed in this paper. It is demonstrated that the application of spur-line suppresses the high order harmonic TM020 and TM002 by 3 dB and 10.5 dB, respectively. And the return loss level of the dominant mode TM010 is improved by 5 dB. Moreover, the spur-line is etched in the feed line without increasing the size of the antenna system. Finally, this...
A novel wideband antenna for UMTS and 2.4-GHz WLAN has been proposed in this paper. The measured bandwidth ranges from 1.92 GHz to 2.83 GHz. The measured radiation pattern resembles that of a monopole antenna at both 2.05 GHz and 2.44 GHz. Unlike the conventional PIFA, the antenna can withstand the variation of ground plane length, and maintain the S11 performance. The Z-shaped slot is proven to largely...
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