Wan Noor Najwa Wan Marzudi

Rectangular patch with partial ground wearable antenna for 2.4 GHz applications

This paper presents an investigations of antenna performances and under bent condition on denim substrate material. The antenna consists of a rectangular patch with triangular slot cut at the center and a partial ground plane. The proposed antenna design working on 2.4 GHz wearable applications and achieves an impedance bandwidth from 1.948 - 4 GHz. The measured result are compared with simulated results and good agreement is achieved. The proposed antenna is a suitable candidate for wearable applications.

Antenna incorporated with Electromagnetic Bandgap (EBG) for wearable application at 2.4 GHz wireless bands

In this work, textile antenna incorporated with an Electromagnetic Bandgap (EBG) structure known as high impedance surface for wearable applications at 2.4 GHz wireless band is designed and presented. The antenna and EBG structures (EBGs) are made from common denim fabrics substrate material with dielectric constant of 2.3405 while the radiating elements are made from copper tape. The performances of the antenna incorporated with EBG under bending conditions are presented. The simulated results of the EBG is verified through measurement which shows a good agreement between the simulated and measured results also been documented. The overall results indicate that the possibility to integrate single band antenna with EBG structure using fabric denim material for wearable applications.

Two-Elements Crescent Shaped Printed Antenna for Wireless Applications

This study presents an investigation of the mutual coupling between two printed elements antenna for a multiple-input-multiple-output (MIMO) antenna performance. It consists of two crescent shaped radiators placed symmetrically, and a neutralization line is applied to improve the mutual coupling. Theoretical and experimental characteristics are presented and compared. The antenna yields an achieved impedance bandwidth of 18.67 % (over 2.04–2.46 GHz) with a reflection coefficient <−10 dB and mutual coupling minimization of <−20 dB in addition to a reasonable and stable radiation pattern and envelope correlation.

Minimization of Mutual Coupling Using Neutralization Line Technique for 2.4 GHz Wireless Applications

This paper presented a planar printed multiple-input-multiple-output MIMO antenna with a dimension of 100 x 45 mm2. It composed of two crescent shaped radiators placed symmetrically with respect to the ground plane. Neutralization line applied to suppress mutual coupling. The proposed antenna examined both theoretically and experimentally, which achieves an impedance bandwidth of 18.67% over 2.04-2.46 GHz with a reflection coefficient < -10 dB and mutual coupling minimization of < -20 dB. An evaluation of MIMO antennas is presented, with analysis of correlation coefficient, total active reflection coefficient TARC, capacity loss and channel capacity. These characteristics indicate that the proposed antenna suitable for some wireless applications.

MIMO Antenna Performances on Microstrip Antenna with EBG Structure for WLAN Applications

A dual microstrip MIMO antenna with Electromagnetic Bandgap (EBG) structures presented. EBG structures proposed in order to reduce the coupling between elements .Simulated scattering parameters with and without EBG structures compared. An evaluation of MIMO antenna characteristics is presented, with the analysis of the mutual coupling, correlation coefficients, total active reflection coefficients (TARC), capacity loss and channel capacity using Computer Simulation Technology (CST) Microwave Studio Software. The proposed antenna is a good candidate for WLAN practical applications.

The effect of meander line slit on lower band printed MIMO antenna

This paper presents the results of a parametric study of the effect of the presence of meander line slit on lower band of printed MIMO antenna. Triple band frequency range from 2.628 - 2.72 GHz; 3.164 - 3.5 GHz; and 3.936 - 5.964 GHz with mutual coupling <; -15 dB were achieved. The performances of the proposed antenna on MIMO characteristics are investigated and the details of the design and simulation results are discussed.