Open AccessDual‐polarised antenna using unbalanced power dividers for small‐cell base stations
Author(s) -
Choi S.,
Choi J.
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2015.4403
Subject(s) - antenna (radio) , stacking , electrical engineering , base station , power (physics) , power dividers and directional couplers , optics , physics , engineering , telecommunications , nuclear magnetic resonance , quantum mechanics
A compact, dual‐polarised multiple‐input and multiple‐output antenna for small‐cell base stations is proposed. This antenna is operating at long‐term evolution (LTE) band‐5 and consists of two stacking substrates and cavity‐backed structures. To produce dual polarisation, two edges of the feeding patch on the lower substrate are individually fed by unbalanced power dividers with a phase difference of 90°. These unbalanced power dividers improve the isolation characteristic of this antenna. Measured results show that the proposed antenna has a port isolation higher than 30 dB over the operating range of 820–900 MHz. Furthermore, a high front‐to‐back ratio of 13.5 dB is obtained in spite of the compact size because there are no slots on the ground plane.