Linearly Tapered Slot Antenna with Defected Sides for Gain Improvement

Seongmin PYO  Dae-Myoung IN  In-Chul SHIN  Young-Sik KIM  

IEICE TRANSACTIONS on Communications   Vol.E93-B   No.10   pp.2655-2657
Publication Date: 2010/10/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.2655
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Section on Advanced Technologies in Antennas and Propagation in Conjunction with Main Topics of ISAP2009)
Category: Antennas
tapered slot antenna (TSA),  linearly tapered slot antenna (LTSA),  defected side,  antenna gain,  side lobe level,  radiation pattern,  

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A new linearly tapered slot antenna (LTSA) with defected sides is proposed in this letter. Both sides are defected with half-dumbbell shape slots that may alter the surface current intensities on both sides. As the half-dumbbell size is increased, the 3-dB beamwidth of the proposed antenna is 4° and 6° lower in the E/H-plane, respectively, than these of the LTSA without defects. Accordingly, the measured gain is improved by up to 3.75 dB and the first side lobe level is lowered by about -10.8 dB and -5.8 dB in the E/H-planes, respectively.