This project involved the design and electromagnetic simulation of an air-filled pyramidal horn antenna operating at 8 GHz. A WR-90 rectangular waveguide was used as the feed, and CST Microwave Studio was employed to optimize the horn geometry and evaluate impedance matching, radiation patterns, directivity, and efficiency. 

Objectives

• Design a pyramidal horn antenna centered at 8 GHz with a target gain above 15 dBi.

• Achieve good impedance matching using a WR-90 waveguide feed.

• Evaluate antenna efficiency and directivity at the operating frequency.

Outcomes & Contributions

• Achieved excellent impedance matching with S11 ≈ −28.7 dB and VSWR ≈ 1.08 at 8 GHz.

• Obtained a realized gain of approximately 18 dBi, exceeding the design target.

• Achieved radiation efficiency of approximately 99.5%, indicating minimal losses.

Technical Details & Skills

• Technique: Air-filled pyramidal horn antenna with WR-90 waveguide excitation 

• Tools: CST Studio Suite

• Skills: Microwave antenna design, waveguide analysis, impedance matching, radiation pattern analysis, directivity optimization 

• Field: Electromagnetics, RF Systems, Wireless Communications, Antenna Systems