Touhidul Alam

A Double-Negative Metamaterial-Inspired Mobile Wireless Antenna for Electromagnetic Absorption Reduction

A double-negative metamaterial-inspired antenna is presented for mobile wireless applications. The antenna consists of a semi-circular radiating patch and a 3 × 4 hexagonal shaped metamaterial unit cell array in the ground plane. The antenna is fed with a 50 Ω microstrip feed line. The electric dimensions of the proposed antenna are 0.20λ × 0.26λ × 0.004λ, at the low-end frequency. The proposed antenna achieves a −10 dB impedance with a bandwidth of 2.29 GHz at the lower band and 1.28 GHz at the upper band and can operate for most of the mobile applications such as upper GSM bands, WiMAX, Bluetooth, and wireless local area network (WLAN) frequency bands. The focused novelties of the proposed antenna are its small size, multi-standard operating bands, and electromagnetic absorption reduction at all the operating frequencies using the double-negative metamaterial ground plane.

Wideband Linearly Polarized Printed Monopole Antenna for C-Band

This paper presents a printed wideband elliptical patch antenna on FR-4 substrate for C-band applications. High-frequency structural simulator (HFSS) based on the finite element method (FEM) and Computer simulation technology (CST) based on the finite difference time domain (FDTD) softwares have been used in this research and a wide bandwidth of 4.34 GHz (3.38 to 7.72 GHz) was achieved. The parametric study and equivalent impedance matching circuit of the proposed antenna has been investigated.

Dual elliptical patch antenna design on low cost epoxy resin polymer substrate material

A new dual elliptical patch antenna is proposed for wideband wireless application. The proposed antenna achieved wideband using internal and external parasitic radiators. The microstrip transmission line fed antenna is consisted of two elliptical radiating patches with two external annular parasitic elements and a partial ground plane. The proposed antenna is printed on epoxy resin reinforced woven glass dielectric material. The antenna structure is planar, and its design is simple and easy to fabricate. Experimental result shows that the designed antenna has achieved an impedance bandwidth of 7.28 GHz (VSWR 2) from 5.72 GHz to 13.0 GHz. Moreover, the antenna shows good radiation efficiency with accacptable radiation patterns within the operating frequency band.

Design and analysis of a complementary split ring resonator (CSRR) metamaterial based antenna for wideband application

Abstract In this article, a compact complementary split ring resonator (CSRR) based double-negative (DNG) metamaterial antenna is presented for wideband (4.49 GHz–21.85 GHz) wireless application. The antenna is incorporated with a DNG metamaterial patch: 50Ω microstrip feed line and partial ground plane. The antenna shows measured fractional bandwidth of 131.81% with a compact size of 0.37λ×0.37λ×0.01λ. The commercially available finite integration technique (FIT)-based simulation software, computer simulation technology (CST) microwave studio was adopted to investigate the performance of the proposed antenna. Several parametric studies were performed to investigate the effect of key structural parameters on antenna performances. The double-negative characteristics of the metamaterial were investigated as well.

Negative-µ Metamaterial-Based Stacked Antenna for 1U CubeSat Communication

The 1U CubeSat is a well-known modern nanosatellite and has a typical volume of 10 × 10 × 10 cm3 and weighs as little as 1.33 kg. Compact high-performance antennas are used in CubeSats. This paper presents a low-profile high-gain metamaterial-based stacked antenna for CubeSats. The antenna achieves a fractional bandwidth of 11.48% with overall antenna dimensions of 0.84λ × 0.82λ × 0.099λ at the lower end frequency of 8.29 GHz. The realized gain was increased to 37.32% (increased from 8.01 dB to 11 dB) by using a negative-µ metamaterial ground plane. The antenna performance was also investigated using a 1U CubeSat body.

A 3D directive microwave antenna for biomedical imaging application

A directive three dimensional antenna, using folded radiating structure has been presented for the application of microwave imaging in clinical diagnosis. Two reflector walls have been introduced to achieve higher gain and directive radiation pattern along with the folding technique. The shorting wall technique is utilized to reduce the overall antenna size and to get resonance at a lower frequency. The proposed antenna obtained operating band at 1.67 GHz to 1.74 GHz. The dimension of the 3D radiating structure is 40£25£10.5 mm3. The antenna has an average realized gain of 5.2 dBi. Owing to the unidirectional radiation pattern, high gain and operating bandwidth within lower microwave frequency, the proposed antenna has potential to be used in microwave imaging for biomedical diagnosis. Also, the antenna has been utilized to compute an imaging phenomenon to detect abnormality in human head and result is presented. The design and simulation process are performed in the CST Microwave Studio software. The antenna is fabricated from 0.2 mm thick copper sheets. The results of the fabricated antenna are measured using PNA Network Analyzer (N5227A) and Satimo Star Lab.

A compact disc-shaped super wideband patch antenna with a structure of parasitic element

In this paper, a disc-shaped monopole antenna has been investigated for super-wideband applications with a structure of parasitic element. The proposed SWB antenna consists of disc-shaped patch and a partial ground plane with a structure of parasitic element. The parasitic element consists of 4 rectangular embedded slots on the ground plane. This parasitic element on the ground plane leads the UWB frequency band into the SWB frequency band. This proposed SWB antenna is fed by a microstrip line and is printed on low dielectric FR4 material of 1.6 mm thickness. All the simulations are performed using commercially available, finite element method (FEM) based Ansoft high-frequency structure simulator (HFSS) software and CST Microwave Studio. Measured results exhibit that the proposed disc-shaped antenna shows a wide bandwidth which covers from 2.90 GHz to more than 20 GHz, with a compact dimension of 25 mm x 33 mm for VSWR = 2062. 22) are a good deal sounder than the existing super wideband antennas which make it appropriate for many wireless communication systems such as L, C, X, UWB, Ku, and SWB bands.

A compact triangular shaped microstrip patch antenna with triangular slotted ground for UWB application

This paper is aimed to present a very small sized patch antenna for UWB applications. The antenna used microstrip feed-line. This antenna is very small in dimension. The total size of the antenna is 20×18mm2. Triangular slots in the partial ground plane, are used to get a better bandwidth. The antenna has VSWR<2 over the bandwidth. The whole designing and simulation process of the antenna is done by CST Microwave Studio software.

Broadband Triangle Shape Printed Antenna for Mobile Wireless Communication

In this paper, a broadband antenna for mobile wireless communication is presented and experimentally investigated. The proposed antenna is incorporated with triangle shape radiator and defected ground. The main radiator is connected with 50 Ω microstrip feed line. The antenna has achieved measured VSWR ≤ 2 impedance bandwidth of 1.05 GHz (1.66−2.71 GHz) and 1.42 GHz (3.28−4.7 GHz), which cover GSM 1800, 1900, 2100, UMTS, Bluetooth (2.40–2.80 GHz), WLAN (2.40–2.485 GHz), WiMAX (2.50–2.69 GHz), and WiMAX (3.40–3.60 GHz), Moreover, the antenna has shown good antenna performances with stable radiation pattern and appreciable gain.

Printed microstrip- fed circular patch antenna for wireless communication

In this paper, a new wideband Circular monopole antenna is proposed for Wireless communication. Commercially available finite difference time domain (FDTD) based software Computer Simulation Technology (CST) microwave studio has been adopted in this investigation. A wide frequency bandwidth of 3.25 GHz (1.65 GHz to 4.9 GHz.) has obtained in measurement. The operating frequencies of the proposed antenna are GSM-1800, GSM-1900, UMTS, Bluetooth (2400-2800) MHz, WLAN (2400-2485) MHz and WiMAX frequency bands. The antenna has been printed on FR-4 (lossy) Substrate material with relative Permittivity of 4.6 and thickness of 1.6 mm. The computational results has been validated the measured one. In addition, the electromagnetic absorption analysis has been investigated for the proposed antenna.