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Progress In Electromagnetics Research C
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A NOVEL WIDE BAND MICROSTRIP-LINE-FED ANTENNA WITH DEFECTED GROUND FOR CP OPERATION

By J. A. Ansari, S. Verma, M. K. Verma, and N. Agrawal

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Abstract:
A novel wide band microstrip line-fed antenna with defected ground structure is proposed for circularly polarized characteristics. This antenna is suitable for C-band and partially X-band operation. Antenna1 structure consists of microstrip-line-feed, and the square-shaped slot with defect is incorporated in the ground plane. Furthermore, a rectangular and circular patch embedded in the square slot that improves the performance of the radiating Antenna2 and Antenna3 structure, respectively. The proposed Antenna3 is compact in size and shows a good quality of polarization at resonant frequency band. Antenna3 shows the measured impedance bandwidth of 40.72 % (6.45-9.75 GHz) and also shows the variations of 3-dB axial ratio bandwidth at the 6.806 GHz and 9.13 GHz frequencies with the simulated results, respectively. The return loss, axial ratio, gain, efficiency and radiation pattern of the proposed Antenna3 remain consistent for resonant frequency band. The antenna is practically fabricated and simulated. Measured result shows a good agreement with simulated and theoretical ones.

Citation:
J. A. Ansari, S. Verma, M. K. Verma, and N. Agrawal, "A Novel Wide Band Microstrip-Line-Fed Antenna with Defected Ground for CP Operation," Progress In Electromagnetics Research C, Vol. 58, 169-181, 2015.
doi:10.2528/PIERC15052305

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