Model of a Planar Cherenkov-Type Antenna for Microwave Applications.

Saved in:

Bibliographic Details
Title:	Model of a Planar Cherenkov-Type Antenna for Microwave Applications.
Authors:	Pazynin, Vadym¹, Sirenko, Kostyantyn² SirenkoKY@nas.gov.ua, Keusgen, Wilhelm¹
Source:	Progress in Electromagnetics Research B. 2026, Vol. 116, p19-32. 14p.
Subjects:	Electromagnetic waves, Waveguide antennas, Submillimeter waves, Electromagnetism, Prisms, Polarization (Electricity), Microwave materials, Mechanical efficiency
Abstract:	In this paper, a radiator employing the Cherenkov mechanism for electromagnetic energy transfer from an optically less dense medium into a more dense one is developed and studied using a two-dimensional numerical model. The radiator's principal components are a dielectric prism and an open dielectric waveguide, where the phase velocity of waves exceeds that within the prism. For two linear polarizations in the 24 to 64 GHz range, and this radiator exhibits high efficiency (over 93%) and radiation patterns with main lobes that closely coincide in both direction and width. The direction of radiation demonstrates strong agreement with predictions from the Cherenkov wave theory and shows weak dependence on frequency. These characteristics make the developed antenna suitable for the directional emission and reception of electromagnetic pulses of various polarizations with spectral bandwidths of up to one octave or more. It is demonstrated that the radiation patterns of such antennas can be electrically controlled by altering the permittivity of the dielectric waveguide using an external control signal. The proposed antenna design avoids expensive fabrication processes and can be scaled to sub-millimeter wave ranges without significant modifications. [ABSTRACT FROM AUTHOR]
	Copyright of Progress in Electromagnetics Research B is the property of Electromagnetics Academy and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database:	Engineering Source

Description
Abstract:	In this paper, a radiator employing the Cherenkov mechanism for electromagnetic energy transfer from an optically less dense medium into a more dense one is developed and studied using a two-dimensional numerical model. The radiator's principal components are a dielectric prism and an open dielectric waveguide, where the phase velocity of waves exceeds that within the prism. For two linear polarizations in the 24 to 64 GHz range, and this radiator exhibits high efficiency (over 93%) and radiation patterns with main lobes that closely coincide in both direction and width. The direction of radiation demonstrates strong agreement with predictions from the Cherenkov wave theory and shows weak dependence on frequency. These characteristics make the developed antenna suitable for the directional emission and reception of electromagnetic pulses of various polarizations with spectral bandwidths of up to one octave or more. It is demonstrated that the radiation patterns of such antennas can be electrically controlled by altering the permittivity of the dielectric waveguide using an external control signal. The proposed antenna design avoids expensive fabrication processes and can be scaled to sub-millimeter wave ranges without significant modifications. [ABSTRACT FROM AUTHOR]
ISSN:	19376472
DOI:	10.2528/PIERB25071805