94GHz integrated-horn antennas: impedance, patterns and double-polarized applications

W. Y. Ali-Ahmad

doi:10.1117/12.2301611

1 December 1990 94GHz integrated-horn antennas: impedance, patterns and double-polarized applications

W. Y. Ali-Ahmad

Proceedings Volume 1514, 15th International Conference on Infrared and Millimeter Waves; 15145L (1990) https://doi.org/10.1117/12.2301611
Event: 15th International Conference on Infrared and Millimeter Waves, 1990, Orlando, FL, United States

Abstract

The theoretical and experimental patterns and input impedance of a dipole-fed horn antenna in a ground-plane are presented. The results indicate that the E-plane patterns of a horn antenna in a ground-plane and a horn antenna in a two-dimensional array differ for angles greater than 40°. The input impedance and resonant length are a strong function of the dipole position inside the cavity, and vary from 40Ω to 170Ω and 0.37λ to 0.45λ, respectively. A dual-polarized horn antenna using a novel two- dipole feed is also presented. The orthogonal channels show identical patterns and -23dB polarization isolation at 92GHz. The dual-polarized antenna is well suited for millimeter- wave polarimetric synthetic-aperture radars, radio-astromomical receivers and highefficiency balanced-mixer receivers.

Citation Download Citation

W. Y. Ali-Ahmad "94GHz integrated-horn antennas: impedance, patterns and double-polarized applications", Proc. SPIE 1514, 15th International Conference on Infrared and Millimeter Waves, 15145L (1 December 1990); https://doi.org/10.1117/12.2301611

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