High performance choked feed horn for compact antenna test range reflector

In this paper, design of compact Choked Feed Horn (CFH) with low side lobe, low cross polarization is presented in X-Band. The feed horn comprises of compact waveguide transition and circular waveguide and choked horn. Efficient mode conversion has implemented from TE₁₀ to TE₁₁, and from TE₁₁ to HE₁₁ modes. The antenna has optimized in commercially available CST microwave studio. The fabricated antenna has reported gain of 13.8±0.5dB, HPBW in both El&Az planes are ≥ 32⁰, worst cross polarization reported is 40 dB in band of 8-13GHz. The realized antenna is used as feed for Compact Antenna Test Range (CATR) reflector for antenna measurements.