Tapered Fed Compact UWB MIMO-Diversity Antenna With Dual Band-Notched Characteristics

Micro & Optical Tech Letters

Lee

Kim

et al. 2019

Design and implementation of a four‐port ultra‐wideband (UWB) multiple‐input‐multiple‐output (MIMO)/diversity antenna with dual band‐notched characteristics are presented. The proposed diversity antenna is composed of four identical rhombic‐shaped monopole radiators arranged orthogonally to achieve better interelement isolation and polarization diversity. At each port, the MIMO antenna shows an impedance bandwidth (S11 ≤ –10 dB) of 10.5 GHz (2.8‐13.3 GHz) and an interelement isolation larger than 18 dB. Furthermore, in order to eliminate 3.5 GHz (Wi‐MAX) and 5.5 GHz (WLAN) bands from the UWB range, the antenna radiators are loaded with elliptical complementary split ring resonator structures. The MIMO performance metrics such as isolation, envelope correlation coefficient, and apparent diversity gain are calculated and presented. The MIMO/diversity antenna prototype is fabricated, and experimental results are verified with simulated results.

Section: Resultsmentioning

confidence: 99%

“…The resonant frequency of an individual interfering band is related as follows

f_{i} = \frac{c}{2 L_{i} \sqrt{ε_{r, italiceff}}},

ε_{r, italiceff} = \frac{ε_{r} + 1}{2},

where c is the velocity of light in free space and ε r,eff is the effective dielectric constant of the substrate.…”

Section: Antenna Configurationmentioning

confidence: 99%

Multiple‐input‐multiple‐output/diversity antenna with dual band‐notched characteristics for ultra‐wideband applications

Micro & Optical Tech Letters

Lee

Kim

et al. 2019

“…Omnidirectional properties are depicted for H plane patterns, which indicates that the proposed design can be used for mobile or hand‐held applications . Furthermore, Figure shows that the radiation patterns deteriorates at the higher frequencies due to the splitting of the radiation lobes …”

Section: Resultsmentioning

confidence: 99%

A metamaterial hepta‐band antenna for wireless applications with specific absorption rate reduction

Saraswat¹,

Int J RF Microw Comput Aided Eng

2019

Present article embodies the design and analysis of slotted circular shape metamaterial loaded multiband antenna for wireless applications with declination of SAR. The electrical dimension is 0.260 λ × 0.253 λ × 0.0059 λ (35 × 34 × 0.8 mm3) of proposed design, at lower frequency of 2.23 GHz. The antenna consists of circular shape rectangular slot as the radiation element loaded with metamaterial split ring resonator (SRR) and two parallel rectangular stubs, etched rectangular single complementary split‐ring resonator (CSRR) and reclined T‐shaped slot as ground plane. Antenna achieves hepta bands for wireless standards WLAN (2.4/5.0/5.8 GHz), WiMAX (3.5 GHz), radio frequency identification (RFID) services (3.0 GHz), Upper X band (11.8 GHz—for space communication) and Lower KU band (13.1 GHz—for satellite communication systems operating band). Stable radiation patterns are observed for the operating bands with low cross polarization. The SRR is responsible for creating an additional resonating mode for wireless application as well as provide the declination in SAR about 13.3%. Experimental characteristic of antenna shows close agreement with those obtained by simulation of the proposed antenna.

“…Diversity gain ( DG ) of the proposed antenna can be calculated from the Equation given in Ref. . Calculated DG plot is shown in Figure B.

italicDG = 10 \sqrt{1 - {ECC}^{2}}

…”

Section: Resultsmentioning

confidence: 99%

Design of a compact triple band antenna with independent frequency tuning for MIMO applications

Islam

Int J RF Microw Comput Aided Eng

Sen

et al. 2018

In this article, a planar, low profile microstrip line‐fed triple band multiple input multiple output (MIMO) antenna is presented for WiMax (2.5/3.5/5.5 GHz)/WLAN (2.4/3.6/5.8 GHz) applications simultaneously. The single element of the MIMO antenna consists of (i) a rectangular split ring resonator (SRR), (ii) a stepped impedance resonator (SIR) inside the SRR and (iii) a slot on the SIR. Each of the resonators generates its own individual band and each band is independently tunable. The antenna exhibits three operating bands at 2.35‐2.85 GHz, 3.25‐3.90 GHz and 5.45‐5.65 GHz. Four antenna elements are used to design the proposed MIMO antenna. The simulated results are observed and reported in terms of S‐parameters, gain, radiation patterns, envelope correlation coefficient (ECC), diversity gain (DG), channel capacity loss (CCL) and total active reflection coefficient. ECC and CCL are within the acceptable range defined for 4G and 5G application standards. To validate the simulation results a prototype structure is fabricated and the measured results are compared with those obtained from the simulation.