Electronically reconfigurable parasitic antenna array for pattern selectivity

Autor: Mohammed Al-Husseini, Stefano Boscolo, M. T. Farran, Antonio-Daniele Capobianco, Karim Y. Kabalan
Rok vydání: 2019
Předmět:
Yagi antenna arrays
broadband antennas
antenna radiation patterns
antenna feeds
baluns
beam steering
reconfigurable parasitic antenna array
pattern selectivity
complex feeding networks
planar radiating structures
printed Yagi-Uda antennas
azimuth plane
symmetric structure
active elements
shared reflector
directors
variable length
switched beams
physical lengths
antenna system
bidirectional end-fire
opposite end-fire patterns
balanced parallel strip-slot line
reflector board
focused radiation reconfigurability
directive pattern reconfigurability
Computer science
Acoustics
Beam steering
Energy Engineering and Power Technology
Reflector (antenna)
02 engineering and technology
Antenna array
Balun
0202 electrical engineering
electronic engineering
information engineering
Wideband
020208 electrical & electronic engineering
General Engineering
Reconfigurability
020206 networking & telecommunications
Azimuth
lcsh:TA1-2040
Antenna (radio)
lcsh:Engineering (General). Civil engineering (General)
Software
Zdroj: The Journal of Engineering (2019)
ISSN: 2051-3305
DOI: 10.1049/joe.2018.5141
Popis: Antenna arrays are commonly used to achieve high gains and beam steering, but they require complex feeding networks. For applications demanding moderate antenna gains (≃6 dB) and planar radiating structures, printed Yagi-Uda antennas can offer many advantages, but clearly, they cannot cover the whole azimuth plane. A symmetric structure made of two Yagi-Uda antennas with two active elements, a shared reflector and two directors of variable length is here presented and demonstrated to have switched beams that cover all the azimuth plane. By lengthening the physical lengths of the directors, they turn to act as reflectors: as a result, this antenna system has the ability to switch between broadside, bidirectional end-fire and two opposite end-fire patterns. The feeding is provided by a balanced parallel strip-slot line without the need for a balun section and thus reducing the overall size of the antenna. A modified design is also presented, obtained by adding a reflector board which allows for higher gains and focused radiation reconfigurability in the half-space. Simulated and measured results of both designs are reported showing good agreement. The antenna has a compact size, wideband characteristics and directive pattern reconfigurability.
Databáze: OpenAIRE
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