Open AccessBroadband multiple‐input–multiple‐output antenna using castor leaf‐shaped quasi‐self‐complementary elements
Author(s) -
Patre Situ Rani,
Singh Surya P.
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.2016.0058
Subject(s) - antenna measurement , antenna factor , physics , optics , antenna efficiency , antenna (radio) , electronic engineering , dipole antenna , acoustics , engineering , electrical engineering
In this study, the simulation and experimental studies of a single‐sided broadband multiple‐input–multiple‐output (MIMO) antenna with and without dual band‐rejection characteristics are discussed. The proposed antenna consists of two castor leaf‐shaped quasi‐self‐complementary elements, which are arranged side‐by‐side in mirror‐image configuration. The antenna provides good isolation between its ports without using any isolation technique. The simulated and experimental impedance bandwidths of optimally designed antenna are 142.5% (2.2–13.1 GHz) and 133.3% (2.6–13.0 GHz), respectively. The overlapping communication bands, worldwide interoperability for microwave access and wireless local area network are rejected using two resonators: a slit and a hexagonal‐split‐ring slot loaded on radiating patches. For both the antennas, mutual coupling ( S 21 ) between ports and envelope correlation coefficient are <−15 dB and 0.02, respectively, over the operating frequency band. The antenna elements radiate in opposite directions due to their mirror‐image configuration, when excited individually through the source while the non‐excited antenna port is match‐terminating. The antenna exhibits good peak realised gain and total efficiency over its operating bandwidth, and when loaded with two resonators, it shows a decrease of gain as well as efficiency around the rejected frequency bands. The proposed antenna can be utilised for devices requiring ultra wideband along with Bluetooth frequency spectrum.