Wide-Angle X-Band Antenna Array with Novel Radiating Elements

An antenna array with wide-angle beam steering is presented in this paper. The antenna consists of dielectrically filled open-ended waveguides with a new type of excitation as individual radiators. The characteristics of the radiator have been analyzed. The novel radiator has a wide beamwidth and the frequency band of around 21%. Following the computational modeling and experimental investigations the characteristics of the antenna array for scan angles up to 50° are discussed

INFLUENCE OF RADIATION TO A LOW-ENERGY ELECTRONIC BEAM ON THE GROWTH AND DEVELOPMENT OF PLANTS OF THE SPECIES ERUCA VESICARIA

Observations of the growth of Eruca vesicaria seeds irradiated with doses of 2, 5, 10 and 15 сGy were carried out at the URT-0.5 electron accelerator. Samples 2, 10 and 15 сGy showed the possibility of a growth stimulation effect

Development of the concept of near-field technology in designing the effective small-aperture microwave antennas

Предмет и цель работы. Статья посвящена обзору публикаций авторов по исследованию эффективных малоразмерных одиночных излучателей различных типов с применением технологии ближних полей.Предмет і мета роботи. Статтю присвячено огляду публікацій авторів з дослідження ефективних малорозмірних одиночних випромінювачів різних типів із застосуванням технології ближніх полів.Subject and purpose. This article is devoted to the review of the original works of the authors on studying the effective small-sized individual radiators of various types using near-field technology

The Novel Microwave Stop-Band Filter

The stop-band filter with the new band-rejection element is proposed. The element is a coaxial waveguide with the slot in the centre conductor. In the frame of this research, the numerical and experimental investigations of the amplitude-frequency characteristics of the filter are carried out. It is noted that according to the slot parameters the two typical resonances (half-wave and quarter-wave) can be excited. The rejection band of the single element is defined by the width, depth, and dielectric filling of the slot. Fifth-order Chebyshev filter utilizing the aforementioned element is also synthesized, manufactured, and tested. The measured and simulated results are in good agreement. The experimental filter prototype exhibits the rejection band 0.86 GHz at the level −40 dB