Time-Domain Modeling of Short Pulses Radiation with Aperture Decomposition Method

• Дата: 2002
• Автори: Butrym, A.Yu., Katrich, V.A., Kazanskiy, V.B., Kolchigin, N.N., Pivnenko, S.N.
• Формат: Стаття
• Мова: English
• Опубліковано: Радіоастрономічний інститут НАН України 2002
• Назва видання: Радиофизика и радиоастрономия
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/122344
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Time-Domain Modeling of Short Pulses Radiation with Aperture Decomposition Method / A.Yu. Butrym, V.A. Katrich, V.B. Kazanskiy, N.N. Kolchigin, S.N. Pivnenko // Радиофизика и радиоастрономия. — 2002. — Т. 7, № 4. — С. 394-397. — Бібліогр.: 8 назв. — англ.

This paper is dealt with a general modeling method for Time Domain analysis of aperture antenna pulse radiation. Non-synchronous excitation is the main feature of the proposed approach. We solve in a closed-form the problem of pulse radiation from the rectangular aperture with uniform amplitude distribution and linear time delay distribution (it corresponds to excitation with travelling wave). Then we use a decomposition approach to calculate pulse fields radiated by Tapered Slot Antenna. We decompose an aperture of TSA into elementary rectangular apertures with given amplitudes (taking into account wave impedance and the fact that the power exponentially decays due to radiation losses) and excitation delays. The radiated field can be obtained by totalizing the fields from each elementary aperture. Then we calculate the fields from an array of TSA in H- and E-plane. We set time delay for each antenna in the array to have the ability of steering the radiation pattern of such system. Some radiation patterns for a single TSA as well as for arrays of TSA with different time delay distribution are presented. Some physical interpretations of the obtained results are given as well.