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2008-12-01
Two Novel Compact Triple-Band Microstrip Annular-Ring Slot Antenna for PCS-1900 and WLAN Applications
By
Progress In Electromagnetics Research Letters, Vol. 5, 87-98, 2008
Abstract
This paper presents two compact ring slot antennas which are suitable for the PCS-1900 and the 2.4/5-GHz triple-band operations. The first antenna consists of three annular ring slots. The outer ring is responsible for exciting the first resonant mode where the middle ring excites the second resonant mode. The inner most rings, through their Y-shape-like slots, create a wide upper operating band by combining the third and fourth resonant modes. To improve this antenna, we have employed circular Photonic Bandgap (PBG) structures in order to obtain a smaller slot antenna with better radiation characteristics. In this design, the cross-polarization level in the E-plane has reduced compared to the first antenna by 5.5 dB, 0.3 dB and 4 dB in three resonant bands. Also, the cross-polarization in H-plane has reduced by an amount of 3 dB. In addition, the obtained results show that the co-polarization patterns are very similar in all three frequency bands. In both cases we have reduced the size of antennas to 56% and 42% respectively, of conventional microstrip slot antennas. The simulation results are verified by measurements.
Citation
Hossein Sabri Zahra Atlasbaf , "Two Novel Compact Triple-Band Microstrip Annular-Ring Slot Antenna for PCS-1900 and WLAN Applications," Progress In Electromagnetics Research Letters, Vol. 5, 87-98, 2008.
doi:10.2528/PIERL08110301
http://www.jpier.org/PIERL/pier.php?paper=08110301
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