Journal of Radio Electronics. eISSN 1684-1719. 2025. ¹7
Full text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2025.7.8
OF A PARTIALLY SHIELDED TEM- HORN ANTENNA
IN THE RADIATION-RECEPTION MODES
OF ULTRASHORT ELECTROMAGNETIC PULSES.
V.M. Fedorov, A.V. Ulianov
Joint Institute for High Temperatures of the Russian Academy of Sciences
125412, Moscow, Izhorskaya str., 13, bldg. 2
The paper was received April 1, 2025.
Abstract. Using the KARAT code new calculated data about sizes of the radiation surface in a vicinity of the aperture of an ultra-wide-band antenna were obtained. The 3-D PIC-code KARAT developed by V.P. Tarakanov is full-electromagnetic code at time-domain. The simulation of propagating impulse electro-magnetic waves was performed in radiation/reception modes in limited 3-D domain with the partially-shielded TEM-half-horn type antenna. This antenna had the 4×2 cm2 aperture and full angular divergence of horn electrode ≈ 12°. The radiating antenna was excited by a step-shaped pulse to emit bell-shaped pulses of electromagnetic waves with duration of ≈ 50 ps. The pulse shapes were similar to the experimental pulses in our studies of the principle of reciprocity of effective antenna apertures in radiation/reception modes using the well-known two-antenna method. The simulation of radiation in the far zone was performed by an analytical formula and the equivalence theorem of secondary current radiation on the secondary surface. The time derivative for the radiation of secondary currents was transferred to the primary excitation pulse of the considered antenna. As a result, a secondary excitation source with the bell-shaped pulse was connected to the antenna. The calculated effective radiation and reception surfaces of antennas for the electromagnetic pulse were equal. It was found that when 90 % of the maximum amplitude of the radiation pulse was reached in the far zone, the calculated surface size of the emitting antenna exceeded the surface size of the receiving antenna by 1.8 times.
Key words: principle of reciprocity, principle of equivalence, effective antenna aperture, ultra-wideband pulse signals, numerical 3D modeling of antennas.
Financing: This work was supported by the Ministry of Science and Higher Education of the Russian Federation (State Assignment No. 075-00269-25-00).
Corresponding author: Ulianov (Ul’yanov) Alexander Vital’evich, ostashev@ihed.ras.ru.
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For citation:
Fedorov V.M., Ulianov A.V. The principle of reciprocity of a partially shielded TEM-horn antenna in the radiation-reception modes of ultrashort electromagnetic pulses. Numerical simulation // Journal of Radio Electronics. – 2025.- ¹ 7. https://doi.org/10.30898/1684-1719.2025.7.8 (In Russian)