Wideband, Circular Polarized Sum and Difference Pattern Coaxial Antenna

Autor:	Philip W. C. Hon, Gregory P. Krishmar-Junker, Arun K. Bhattacharyya
Rok vydání:	2021
Předmět:	Physics Optics Coaxial antenna business.industry Mode coupling Impedance matching Reflector (antenna) Electrical and Electronic Engineering Antenna (radio) Wideband Coaxial business Circular polarization
Zdroj:	IEEE Transactions on Antennas and Propagation. 69:5969-5973
ISSN:	1558-2221 0018-926X
DOI:	10.1109/tap.2021.3061591
Popis:	We present a compact coaxial flared antenna for communication and tracking applications with a broad instantaneous RF bandwidth greater than alternatives like a circular horn. To solve the free space impedance mismatch due to the small aperture, a flared, impedance transforming outer conductor is proposed. Modal analysis is applied and modal coefficients, as a function of the number of excitations, are assessed; a circular polarized TE21 difference mode with the same cutoff frequency as the TE11 sum mode via impedance matching and specified mode coupling points resulted in a 2.4 to 1 bandwidth. The polarization diverse antenna exhibits linear or circular polarization and is well suited as a direct radiating element or as a feed for low f/D lens or reflector applications.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ecd2a9a27c72b662de4885b35d75fce6 https://doi.org/10.1109/tap.2021.3061591 Zobrazit plný text záznamu