Open AccessAxially displaced elliptical reflector antenna design with a switchable feeder for ultra‐wide band applications
Author(s) -
Keskin Kenan Ahmet,
Caliskan Alper
Publication year - 2018
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2018.5228
Subject(s) - vivaldi antenna , reflector (photography) , optics , ranging , antenna measurement , offset dish antenna , parabola , ultra wideband , engineering , periscope antenna , antenna (radio) , electrical engineering , physics , telecommunications , light source
This study presents a novel compact high gain dual reflector antenna design with a switchable feeder for ultra‐wide band (UWB) applications. The design comprises a main parabola, a replaceable feeder antenna that is chosen depending on the requirements in a given situation, and an axially displaced elliptical sub‐reflector. The functioning of two different feeder antennas with manual switching option, the partly dielectric loaded K‐Vivaldi and double‐ridged horn (RH), is discussed in this research study. When the K‐Vivaldi is employed, the dual reflector antenna is more appropriate for impulse radiation with 33:1 operational bandwidth, ranging from 600 MHz to 20 GHz. The double‐RH feeder antenna displays more efficiency than the K‐Vivaldi one; however, the bandwidth in this case goes down to 12:1, ranging from 1.6 to 20 GHz. The sub‐reflector, situated inside the main parabola aperture with onset type of feeders, reduces the depth of the structure to 16 cm. The antenna dimensions are 60 cm × 60 cm x 16 cm. Experiments have shown that the designed antennas display good efficiency and high gain performances in UWB operations.