Circularly polarized stacked antenna with broadband and high gain characteristics

Abstract

A broadband and high gain circularly polarized stacked antenna with small size was designed. The antenna includes a double‐Y type slot radiator and two slot‐loaded patches with chamfering. Right hand circular polarization performance is achieved by adjusting the length of the two branch of Y type slot. In order to expand the antenna impedance bandwidth and axial ratio (AR) bandwidth, multilayer structure was used. Two patches with chamfering were chosen for radiating element. With the form of orthogonal, rectangular slot cut on the center of the two patches, small size of antenna can be achieved. The measurements show that, the proposed antenna's −10 dB impedance bandwidth is 32.7% (from 4.1 to 5.7 GHz), the 3 dB (AR) bandwidth is 20.7% (from 4.4 to 5.4 GHz) and the gain of the antenna is about 9 dB, which agree well with the simulations. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:292–298, 2017

A compact wideband circularly polarized antenna with dual SIW cavity modes

“…Due to their narrow axial ratio (AR) bandwidths, traditional circularly polarized (CP) planar microstrip antennas, are not applicable. In order to enhance the impedance and AR bandwidths simultaneously, many solutions, such as coplanar probe feeding and L‐probe feeding techniques, U‐slotted patches and stacked patch configurations, have been suggested in literature. However, these methods often lead to broadened sizes and high profiles.…”