Wideband Circularly Polarized SIW Antenna Array That Uses Sequential Rotation Feeding

الملخص EN

A wideband right-handed circularly polarized (CP) substrate integrated waveguide- (SIW-) based diamond ring-slot antenna array at the X-band is presented in this study.

The array consists of four elements that exhibit wideband impedance matching characteristics and good radiation performance.

The array also employs a sequential rotation feeding method to achieve the wideband axial ratio (AR) bandwidth.

The feeding network is based on the SIW power divider with a delay line related to sequential rotation feeding.

To validate our design, an antenna array is fabricated and measured.

The measured impedance and AR bandwidths are 19.2% ( VSWR < 2 ) and 14.1% ( AR < 3 dB), respectively.

Moreover, the antenna has a stable CP peak gain of more than 12 dBic from 10.1 GHz to 10.7 GHz.