Vol. 55

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2014-11-20

A Monopole Antenna with Dual-Band Reconfigurable Circular Polarization

By Shujie Shi, Wei-Ping Ding, and Kang Luo
Progress In Electromagnetics Research C, Vol. 55, 35-42, 2014
doi:10.2528/PIERC14101101

Abstract

This paper describes a monopole antenna with dual-band switchable circular polarization (CP) sense in WLAN and WiMAX bands. The proposed antenna consists of a rectangular patch fed by a microstrip line and a ground plane embedded with a T-shaped slot integrated with PIN diodes. The slotted ground is capable of exciting CP sense around 2.45 GHz for WLAN and around 3.4 GHz for WiMAX, respectively. Two triangular strips are added to improve impedance matching. The CP sense of the proposed antenna can be reconfigured between the right-handed circular polarization (RHCP) and left-handed circular polarization (LHCP) by switching the states of PIN diodes in the slot. The lower band 3-dB axial ratio (AR) bandwidth is 8.6%, and the upper band 3-dB AR bandwidth is 20.8%, in which the return loss is less than -10-dB. Simulated analysis and measured results are carried out and good agreement is achieved.

Citation


Shujie Shi, Wei-Ping Ding, and Kang Luo, "A Monopole Antenna with Dual-Band Reconfigurable Circular Polarization," Progress In Electromagnetics Research C, Vol. 55, 35-42, 2014.
doi:10.2528/PIERC14101101
http://jpier.org/PIERC/pier.php?paper=14101101

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