Linearly Tapered Slot Antenna with Defected Sides for Gain Improvement

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

doi:10.1587/transcom.E93.B.2655

Special Section on Advanced Technologies in Antennas and Propagation in Conjunction with Main Topics of ISAP2009

Linearly Tapered Slot Antenna with Defected Sides for Gain Improvement

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

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Keywords: tapered slot antenna (TSA), linearly tapered slot antenna (LTSA), defected side, antenna gain, side lobe level, radiation pattern

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2010 Volume E93.B Issue 10 Pages 2655-2657

DOI https://doi.org/10.1587/transcom.E93.B.2655

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Abstract

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 3.75dB and the first side lobe level is lowered by about −10.8dB and −5.8dB in the E/H-planes, respectively.

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