3D Printed Wideband Circularly Polarized Pyramidal Horn Antenna with Binomial Polarizer for CP-SAR Application

In this paper, the development and characterization of three-dimension (3D) printed wideband pyramidal horn antenna equipped with binomial polarizer is presented. The proposed pyramidal horn antenna which is designed to operate at the X-band frequency and optimized to produce circularly polarized waves is intended to be used for circularly polarized synthetic aperture radar (CP-SAR) application. The optimized antenna design is manufactured using 3D printing technology for fast prototyping time, low cost, and light weight which is very suitable for small platform of CP-SAR sensor. The performance of realized antenna has demonstrated the fractional impedance bandwidth of 26% for S
₁₁
below-10dB, the axial-ratio bandwidth of 6.2% below 3dB, and the gain achievement up to 12dBic at the desired frequency.