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.
Bibliographical noteFunding Information:
Manuscript received June 14, 2010; revised June 28, 2010; accepted June 30, 2010. Date of publication July 15, 2010; date of current version August 09, 2010. This work was supported by the IT R&D program of MKE/KCC/KEIT (KI001685, Study on Diagnosis and Protection Technology based on EM).
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering