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http://dx.doi.org/10.5515/KJKIEES.2008.19.6.640

Fabrication of the Corrugated Feed Horn for 85~115GHz Radio Telescope System  

Son, Tae-Ho (Dept. of Information and Communication Eng., Soonchunhyang University)
Han, Seog-Tae (Radio Astronomy Division, Korean Astronomy and Space Science Institute)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.19, no.6, 2008 , pp. 640-646 More about this Journal
Abstract
Design procedure of corrugated horn antenna for the mm-wave frequency range is presented, and hybrid condition in horn is calculated. In this paper, corrugate profiles of horn which satisfy both transition to balanced hybrid condition and fabrication possibility under the mm-wave short wavelength are obtained. Electromagnetic fields inside horn and corrugation are derived by the cylindrical mode theory. Propagation characteristics in the horn are calculated by the mode impedance matching method with boundary conditions, and radiation fields are obtained by the Kirchhoff-Hyugen principle to the horn aperture fields. A mm-wave corrugated horn antenna which operates on $85{\sim}115GHz$ is fabricated by electric forming method. Measurements show that VSWR is under 1.3:1 over whole band and the half power beamwidth on radiation pattern 9.2, 9.16 and 9.02 degree on 85, 100 and 110 GHz are agree well with theoretical calculation.
Keywords
Corrugated Horn; Millimeter Wave Horn; Hybrid Condition; Cylindrical Mode Theory;
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