• Proceedings of the Korea Electromagnetic Engineering Society Conference
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• 2003.11a
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• pp.487-491
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• 2003

Design procedure of corrugated horn antenna for mm-wave frequency range is presented, and hybrid condition in horn is calculated. Balanced hybrid mode should be converted in the horn from TE11 mode by the proper corrugation dimensions which size are available to be fabricated under the mm-wave short wavelength condition. In this paper, corrugate profiles which satisfy both hybrid condition and fabrication possibility are obtained.. By cylindrical mode theory, the electromagnetic fields both inside hem and corrugation are delivered. Propagation characteristics in hem is calculated by the mode impedance matching method with boundary conditions, and radiation fields are obtained by the Kirchhoff-Hyugen principle to the hem aperture fields. A mm-wave corrugated horn operates on 85 - 115GHz is designed and fabricated, and results of measurement are also shown.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.14 no.6
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• pp.655-662
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• 2003

A rigorous field analysis by the non-decaying mode and the contour graph method is presented for dielectric-rod loaded cylindrical cavity resonators. Resonant frequencies and the lowest order modes for this resonator are calculated. The mode charts are presented to design the resonators. TE mode(transverse electric or H mode, having no Ez), TM mode(transverse magnetic or I mode, having no ㎐) and HEM mode(hybrid electromagnetic mode, having non-zero Ez and ㎐) are analyzed in detail using non-decaying mode method. The mode charts are completed. The validity of the theory is confirmed by experiments. The results were on the whole satisfactory. Experimental measurements show excellent agrement with the numerical results. The average error of TE, TM, and HEM mode is about 0.20 %, 0.14 %, and 0.28 %, respectively.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2004.07b
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• pp.578-581
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• 2004

유전체가 삽입된 공동 공진기는 유전체에 대부분의 전자계가 집속되어 있기 때문에, 도체 손실이 매우 적고 높은 Q값과 온도 안정성이 뛰어나다. 동일한 주파수에서 동작하는 다른 필터에 비해 상대적으로 작기 때문에 소형화에도 적합하다. 본 논문에서는 유전체가 삽입된 공동 공진기의 전자기 분포와 특성을 수치해석과 HFSS(High Frequency Structure Simulator)를 이용하여 분석하였고 이 결과를 토대로 HFSS를 이용한 순차적 방법을 도입하여 4-pole 이중모드 대역통과 필터를 설계, 제작하였다.