An end fire printed monopole antenna based on electromagnetic band gap structure

Naiemy, Yahiea Al; Elwi, Taha A.; Nagy, Lajos

doi:10.1080/00051144.2020.1785783

Cited by 19 publications

(22 citation statements)

References 13 publications

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“…Substantial developments have been conducted on the antenna design techniques to enhance their performance in terms of gain bandwidth products [1]. For example in [2], a microstrip antenna was invented by L-prop feed with a bandwidth of 36% and an average gain of approximately 7 dBi. A Vivaldi antenna with a bandwidth of 3.1 GHz to 10.6 GHz and a gain of approximately 6 dBi was developed [3].…”

Section: Introductionmentioning

confidence: 99%

Metamaterial Vivaldi Printed Circuit Antenna Based Solar Panel for Self-Powered Wireless Systems

Abdulmjeed¹,

Elwi²,

Kurnaz³

2021

PIER M

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A high-gain wide-band planar antenna with H-Shaped Resonators (HSRs) for Self-Powered wireless systems is proposed in this paper. The proposed antenna consists of four major parts, namely, a grating Vivaldi electrical dipole, a half-ring magnetic dipole, HSRs, and a solar panel reflector. The dipoles are etched from both antenna substrate sides by each half on one side. The HSR structures are etched on a single side of the used substrate to avoid the capacitive coupling effects which cause the radiation efficiency reduction. HSR inclusions are designed and tested numerically to have the desired electromagnetic properties at frequency band of interest. After introducing the HSR inclusions to the antenna structure, the antenna performance is tested numerically and compared to that without HSR inclusions. The fabricated prototype based HSR structure shows an enhanced gain bandwidth product to cover the frequencies from 1.75 GHz up to 7.43 GHz with a gain varying from 9.52 dBi up to 16.71 dBi over the entire frequency range. Finally, an excellent agreement has been achieved between the gathered numerical results and those from the experimental measurements.

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Section: Introductionmentioning

confidence: 99%

Metamaterial Vivaldi Printed Circuit Antenna Based Solar Panel for Self-Powered Wireless Systems

Abdulmjeed¹,

Elwi²,

Kurnaz³

2021

PIER M

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“…[9][10][11][12] Printed monopole antennas have several advantages like light weight and easier integrability with the wearable devices yet these printed monopole antennas suffer from high SAR value due to their side and back lobe radiation, directly absorbed by human body. [13][14][15][16] To overcome this, there are some techniques to minimize the SAR value by introducing high impedance surface (HIS), 17 artificial magnetic conductor (AMC), 18 and EBG 19 on the back side of antenna. These structures reduce the surface wave in particular band gap.…”

Section: Introductionmentioning

confidence: 99%

SAR reduction and gain enhancement of compact wideband stub loaded monopole antenna backed with electromagnetic band gap array

Singh

Verma

2021

Int J RF Microw Comput Aided Eng

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This article discusses a design of compact wideband stub loaded monopole antenna (CWSLMA) backed with 3 Â 3 array of hexagonal shaped electromagnetic band gap (EBG) cell operating at 2.45 GHz with enhanced gain and low specific absorption rate (SAR) for wireless body area network (WBAN) applications. The split ring rectangular shaped radiator is designed with protruding stub to miniaturize the antenna size of monopole antenna (34 Â 18 Â 1.6 mm 3 ) at resonance frequency 2.45 GHz. The proposed CWSLMA is fabricated on glass epoxy FR4 substrate supported with 3 Â 3 array of hexagonal shaped EBG cell over Kapton polyimide flexible substrate.The proposed antenna consists of simulated 10 dB return loss (RL) bandwidth (BW) of 16.7% (2.3-2.72 GHz). The proposed 3 Â 3 array of hexagonal shaped EBG cell enhances the realized gain of proposed CWSLMA to 7 dBi by reducing the back-lobe radiation. The EBG array also increased the isolation between fabricated wearable antenna and human body and thus, reduced SAR to 0.44 W/kg (tested over 10 g of human tissues) at frequency 2.45 GHz. The fabricated proposed CWSLMA with EBG achieved a measured 10 dB RL bandwidth of 17.3% (2.27-2.7 GHz) and a measured group delay below than 1 ns in entire operational band with measured gain of 6.8 dBi. The proposed CWSLMA with EBG is designed, fabricated, and tested. The measured results of fabricated antenna prototype are verified and validated with simulated ones.

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“…Therefore, the present wireless communication technology invoked tremendous interest in smart antennas, especially for 4G and 5G [10]. For this, the researchers have been attracted to utilize reconfigurable smart antennas to improve the wireless communication systems performance in different applications [11][12][13]. However, they faced a new challenge: integrating antennas with modern high-speed semiconductors while maintaining the size miniaturization and keeping high gain-bandwidth produce over the frequency band of interest [14,15].…”

Section: Introductionmentioning

confidence: 99%

Design of a Controllable Antenna Based on Embedded Differential PSK Modulation

Alnaiemy¹,

Nagy²

2021

PIER B

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Direct Antenna Modulation (DAM) is explored recently in many wireless communication systems. In this paper, we explore the modulation process of electromagnetic signals in the antenna circuit design directly. The proposed antenna consists of two non-concentric elliptical patches for broadband applications to suit the spread spectrum applications. To perform a Differential Phase Shift Keying (DPSK) modulation, two identical antennas are fed by a two-branch microstrip line with a phase shift. Utilizing Computer Simulation Technology of Microwave Studio (CSTMWS) based on Finite Integral Technique (FIT), an optimization based-on numerical analysis is adopted for designing the transmission line configuration at the desired frequency bands. The other significant aspect that has been achieved in this research is reducing the patch size to be suitable for wearable devices. Therefore, a cylindrical substrate is utilized for bending the proposed antenna structure. The proposed antenna design shows a gain of 4.73 dBi and 2.5 dBi for the planar and folded antenna profile, respectively. Two high-speed Positive Intrinsic Negative (PIN) diodes as switching elements of the RF signal are inserted between the identical antenna elements through a transmission line. Switch 1 (SW1) and switch 2 (SW2) are used to control the phase shift between the antenna elements by changing the switching state from (OFF-ON) and vice versa. The designed antenna is further investigated to realize the effects of radiation leakage from the antenna elements on the human body in the context of wearable applications. This study is conducted to the antenna performance when it is bent on a cylinder and compared to the flat case on four human body regions: arm, head, thigh, and chest. The proposed antenna based on PIN diodes is fabricated, measured, and tested. Using a 3D axis field strength meter, the proposed antenna system field strength is measured for different conditions at various locations of the human body. Finally, an excellent agreement is found between the obtained numerical results and measurements.

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An end fire printed monopole antenna based on electromagnetic band gap structure

Cited by 19 publications

References 13 publications

Metamaterial Vivaldi Printed Circuit Antenna Based Solar Panel for Self-Powered Wireless Systems

Metamaterial Vivaldi Printed Circuit Antenna Based Solar Panel for Self-Powered Wireless Systems

SAR reduction and gain enhancement of compact wideband stub loaded monopole antenna backed with electromagnetic band gap array

Design of a Controllable Antenna Based on Embedded Differential PSK Modulation

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