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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
Publication Date: 2010/10/01
Online ISSN: 1745-1345
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)
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.