Infrared measurements of waveguide modes and radiation patterns of beveled-cut circular waveguide microwave aperture antennas

John D. Norgard; Joseph Sadler; Ronald M. Sega; Ernest A. Baca; William D. Prather

doi:10.1117/12.171179

21 March 1994 Infrared measurements of waveguide modes and radiation patterns of beveled-cut circular waveguide microwave aperture antennas

John D. Norgard, Joseph Sadler, Ronald M. Sega, Ernest A. Baca, William D. Prather

Author Affiliations +

Proceedings Volume 2245, Thermosense XVI: An International Conference on Thermal Sensing and Imaging Diagnostic Applications; (1994) https://doi.org/10.1117/12.171179
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

Abstract

An IR imaging technique has been developed to map 2D electric field distributions near an emitter or a scattering body. This technique is applied to design a highly directive microwave aperture antenna. The antenna is made from circular waveguides. The antenna is fed with a circularly symmetric coaxial TM₀₁ mode. From symmetry, the TM₀₁ mode does not radiate in the bore-sight direction from an open-ended circular waveguide; however, the dominant circular TE₁₁ mode does have a directive main beam radiation pattern.

Citation Download Citation

John D. Norgard, Joseph Sadler, Ronald M. Sega, Ernest A. Baca, and William D. Prather "Infrared measurements of waveguide modes and radiation patterns of beveled-cut circular waveguide microwave aperture antennas", Proc. SPIE 2245, Thermosense XVI: An International Conference on Thermal Sensing and Imaging Diagnostic Applications, (21 March 1994); https://doi.org/10.1117/12.171179

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