COMPACT BAND-NOTCHED ULTRAWIDEBAND Y-SHAPED ANTENNA WITH DUAL INVERTED-L SLOTS

摘要

In this work, a novel band-notched ultrawideband (3.1-10.6 GHz) Y-shaped microstrip patch antenna with dual inverted-L slots is presented. The proposed antenna consists of a wideband Y-shaped monopole antenna and dual inverted-L slots, producing band-notch characteristics. To obtain sufficient bandwidth when the return loss (RL) < -10 dB, but still generate band-notch characteristics, we propose that a partial ground plane, a coaxial probe source, and two inverted- L slots can be used. The measured bandwidth of the fabricated antenna is from 2.96 to 4.85 GHz (from 6.05 to 12.65 GHz when the RL < -10 dB), and the frequency notch band is from 5.15 to 5.825 GHz. The measured gain is 3.66-4.58 dBi, which drops to -3.80 dBi in the notch band. The azimuth and elevation of the experimental 3-dB beam width (HPBW) are 72.58° and 88.59° at 7.0 GHz, respectively.