Open AccessFront‐to‐back ratio improvement of a short pyramidal horn antenna using metal strips/rods in LTE/cellular band
Author(s) -
Lee KyoungJoo,
Oh SoonSoo,
Lee YoungHwan,
Kim YoungSik
Publication year - 2016
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.2015.0241
Subject(s) - horn antenna , radiation pattern , french horn , optics , flange , strips , dipole antenna , antenna efficiency , antenna (radio) , materials science , antenna measurement , axial ratio , acoustics , physics , electrical engineering , slot antenna , engineering , microstrip antenna , composite material
This study presents a very short pyramidal horn antenna for monitoring the radiation characteristics of mobile base‐station (BS) antennas operating in the long‐term evolution (LTE)/cellular band. The proposed short pyramidal horn is integrated with metal strips/rods to overcome deficiencies of the shortened horn, especially in its front‐to‐back (F/B) ratio. The proposed short horn antenna improves the average F/B ratio by at least 8 dB in the frequency range from 690–960 MHz by controlling the edge diffraction. The total length of the antenna, including a waveguide flange, is only approximately 0.6 λ at 800 MHz. The proposed antenna also retains good characteristics such as a monotonically increasing gain, wide bandwidth, and a good purity of polarisation. The proposed antenna can replace the dipole antenna as a reference gain antenna for both indoor and outdoor measurement systems below the L‐band.