scholarly journals A 2×2 DUAL-BAND MIMO ANTENNA WITH POLARIZATION DIVERSITY FOR WIRELESS APPLICATIONS

2016 ◽  
Vol 61 ◽  
pp. 91-103 ◽  
Author(s):  
Leeladhar Malviya ◽  
Rajib Kumar Panigrahi ◽  
Machavaram Venkata Kartikeyan
Keyword(s):  
Dual Band ◽  
Polarization Diversity ◽  
Mimo Antenna ◽  
Wireless Applications

scholarly journals DUAL-BAND RECONFIGURABLE MIMO ANTENNA FOR WIRELESS APPLICATIONS

2021 ◽  
Vol 25 (3) ◽  
pp. 1-9
Author(s):  
Abdullah A. Jabber ◽  
◽  
Raad H. Thaher ◽  
Keyword(s):  
Coupling Effect ◽  
Mimo System ◽  
Dual Band ◽  
Reconfigurable Antenna ◽  
Pin Diode ◽  
Wireless Devices ◽  
Resonant Frequencies ◽  
Mimo Antenna ◽  
Wireless Applications ◽  
Simulation Results

This article presents design and simulation of a new compact four-element dual-band MIMO frequency reconfigurable antenna that can be reconfigured for WiMAX and LTE applications. The antenna includes four elements at the same FR4 substrate with an optimized overall size of 65x65x1.6 mm3 and an optimized partial GND plane of 30x11.125 mm2. The reconfiguration rate is between 2.41 and 3.99 GHz that can cover the WiMAX and LTE wireless devices by applying just one RF (PIN) switch to change the operating frequency. The antenna operates on the two states of the PIN diode under its two states ON and OFF with (2.7 GHz, and 2.8 GHz) resonant frequencies respectively. The proposed antenna produces acceptable simulation results for the MIMO system by achieving gain from (3-7.2) dBi, less than -14.5 dB coupling effect, less than 0.28 envelope correlation coefficient, and diversity gain range from 8.4-10.

Compact ACS-Fed UWB MIMO Antenna with Dual Band Notches

2021 ◽  
Vol 36 (1) ◽  
pp. 55-60
Author(s):  
Qin Li ◽  
Yufa Sun ◽  
Hongyu Fang
Keyword(s):  
Correlation Coefficient ◽  
Channel Capacity ◽  
Simple Structure ◽  
Dual Band ◽  
Polarization Diversity ◽  
Mimo Antenna ◽  
Compact Size ◽  
Simulation Results ◽  
Communication Equipment

In order to improve the channel capacity of communication equipment and reduce the size of antenna, an asymmetric coplanar strip (ACS) fed four-element UWB MIMO antenna with dual band notches is proposed in this paper. The antenna has a simple structure and a compact size of 37×37 mm². The antenna consists of four modifled staircase-shaped radiation elements and four floor on the same side. The antenna elements are placed vertically without additional decoupling structure, and the isolation less than -15 dB in the working bandwidth of 2.9-10.6 GHz can be obtained by using polarization diversity. In addition, the antenna has the notched characteristic of WiMAX and WLAN band. The antenna has good gain and low envelop correlation coefficient (ECC), and the simulation results agree with the measured results, which indicates that the antenna is suitable for UWB system.

A new two-element MIMO antenna system for cognitive radio applications

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
D. Srikar ◽  
Sundru Anuradha
Keyword(s):  
Cognitive Radio ◽  
Design Methodology ◽  
Antenna System ◽  
Utilization Efficiency ◽  
Dual Band ◽  
Polarization Diversity ◽  
Spectrum Utilization ◽  
Content Type ◽  
Mimo Antenna ◽  
Dual Band Antennas

Purpose This study aims to propose a two-element multi-input-multi-output (MIMO) antenna for cognitive radio MIMO applications to avoid the complexities involved in reconfigurable antennas and improve the spectrum utilization efficiency. Design/methodology/approach The proposed MIMO antenna system comprises a wideband antenna that operates at 2 GHz–12 GHz for sensing the spectrum and four pairs of antennas for communication, which are single and dual-band antennas. Each pair of antennas meant for communication consists of two similar antennas. Moreover, the antennas meant for communication cover 93% of the bandwidth of the sensing antenna. Findings The first pair of antennas accessible at ports P2 and P6 and the second pair of antennas accessible at ports P4 and P8, which are dual-band antennas, operate at 3.05 GHz–3.85 GHz, 5.8 GHz–8 GHz and 2.05 GHz–2.55 GHz, 4.7 GHz–6.1 GHz, respectively. While the third pair of antennas accessible at ports P3 and P7 and the fourth pair of antennas accessible at ports P5 and P9 are single-band antennas and operate at 3.85 GHz–4.7 GHz and 8 GHz–11 GHz, respectively. Minimum isolations of 20 dB and 15 dB are attained between every two similar antennas for communication and between the sensing antenna and the antennas meant for communication, respectively. The correctness of the proposed antenna is verified with a fine match between the results obtained from simulations and measurements. Originality/value The proposed MIMO antenna possesses salient features, such as polarization diversity and performing a maximum of four communication tasks when all the white spaces are detected.

Compact Dualband Mimo Antenna for Wireless Communication

2021 ◽  
Author(s):  
Vijetha Tummala ◽  
D Ramakrishna ◽  
R Karthik
Keyword(s):  
Mutual Coupling ◽  
Ground Plane ◽  
Circular Ring ◽  
Antenna System ◽  
Dual Band ◽  
Mimo Antenna ◽  
Wireless Applications ◽  
Multiple Input ◽  
Constant E ◽  
Communications System

Abstract A compact dual band two element planar multiple input and multiple output (MIMO) antenna system is designed for Wireless applications. The Proposed design consists of two printed F shape slot radiators which are arranged symmetrically on the upper layer of the substrate. A patch with I shaped strip on the ground plane helps in reducing the mutual coupling between radiators and A circular ring slot is placed in ground plane to improve the bandwidth of antenna. The proposed module is designed on Fr-4 substrate whose dielectric constant (ɛr) is 4.4. The results show that the MIMO antenna has a resonance frequency at 2.2GHz, which is suitable for Wireless communications system applications and comes with a mutual coupling(s12) less than − 15 dB and the envelop correlation coefficient (ECC) did not exceed 0.02 in the entire operating band of the MIMO antenna part.

scholarly journals A MINIATURIZED DUAL-BAND MIMO ANTENNA WITH LOW MUTUAL COUPLING FOR WIRELESS APPLICATIONS

2019 ◽  
Vol 93 ◽  
pp. 93-101 ◽  
Author(s):  
Mohssine El Ouahabi ◽  
Alia Zakriti ◽  
Mohammad Essaaidi ◽  
Aziz Dkiouak ◽  
Elftouh Hanae
Keyword(s):  
Mutual Coupling ◽  
Dual Band ◽  
Mimo Antenna ◽  
Wireless Applications

scholarly journals SWB MIMO Antenna with Dual Band Rejection Characteristics and Polarization Diversity for UWB Applications

2021 ◽  
Author(s):  
Faezeh Bahmanzadeh ◽  
Farzad Mohajeri
Keyword(s):  
Communication Systems ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Wide Band ◽  
Ring Resonators ◽  
Dual Band ◽  
Special Technique ◽  
Polarization Diversity ◽  
Mimo Antenna ◽  
Half Wavelength

Abstract In this paper a super wide band 2-element MIMO antenna with dual band-notched characteristics and high isolation is presented for use in broadband polarization diversity communication systems. Total dimensions of the fabricated antenna is 34 × 60 mm2 and achieves a super wide impedance matching of more than 15 GHz from 2.3 to 18 GHz due to the simulated and measured results which covers L, S, C, X, Ku bands and some parts of K band with two notched frequency bands around 3.1 – 3.7 GHz for WiMAX and 5.1 – 5.8 GHz for WLAN which realized by etching two half-wavelength elliptic single complementary split-ring resonators (ESCSRRs) of different dimensions on the radiating patches. This antenna comprises two identical elements which placed orthogonally to each other and fed by two 50Ω coplanar waveguide (CPW) lines, therefore an isolation of more than 20 dB is obtained autonomously without utilizing any other special technique. Diversity performance in terms of envelop correlation coefficient (ECC< 0.0035), multiplexing efficiency (ηmux > -1 dB) and diversity gain (DG > 9.99 dB) are also calculated, showing satisfactory MIMO characteristics.

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