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Design of the Printed Slot Antenna Using Wiggly Line With Harmonic Suppression

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5 Author(s)
Sang il Kwak ; Radio Technol. Res. Dept., Electron. & Telecommun. Res. Inst. (ETRI), Daejeon, South Korea ; Jong Hwa Kwon ; Dong-Uk Sim ; Kihun Chang
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In this letter, a microstrip slot antenna using a wiggly line for suppressed harmonics is proposed. To eliminate unwanted radiation at harmonic frequencies, a wiggly-line band-stop filter structure applying the Bragg conditions is used. The size of the proposed slot antenna is 60 <; 40 mm2. It is fabricated on a substrate with a dielectric constant of 2.5 and thickness of 0.508 mm. The center frequency of the proposed antenna is 2.4 GHz, WLAN bands. The measured return loss is near 0 dB, and the measured radiation pattern of the slot antenna with wiggly line shows -15 dB suppression at 7.3 GHz, the third harmonic frequency. From the results, the proposed antenna has novel suppression characteristics in the harmonic frequency band.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:9 )