Wideband volume horn array antenna with switchable polarization capability

This paper presents the most valuable theoretical results that confirm the possibility of practical realization of a wideband volume horn array antenna with the switchable polarization capability. Among key features of the proposed antennas are their high stability of switchable linear polarization tilt angle of radiated electromagnetic wave, radiation pattern of sector type and wide operating frequency band. The paper focuses on characteristics of linear horn antenna subarrays as key components of the described volume array antenna. Subarrays fully comprise double-ridge waveguide sections. The cutoff wavenumbers calculation algorithm is developed for the symmetrical double-ridge waveguides to estimate frequency bandwidth of power dividers in their different cross sections. The problem is solved numerically by partial regions method taking into account field singularity on rectangular metal ridges

Методологічні аспекти фізичної економії

The article describes physical economy as a part of economic theory in which nature and regularity of movement of economic systems are researched. In particular, interpretations of concept of economic space, economic subject as a source of forces that provide dynamism of economic processes, as well as concept of economic time are given