Hybrid Pifa-Patch Antenna Optimized by Evolutionary Programming

Montero, Rocío Sánchez; Salcedo‐Sanz, Sancho; Portilla-Figueras, Antonio; Langley, Richard

doi:10.2528/pier10072804

Cited by 21 publications

(19 citation statements)

References 20 publications

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“…The metal effect is limited in the tag antenna which has its own ground plane [17,18]. However, the antenna which does not have a ground plane, such as quadrate bowtie, the radiation characteristics and input impedance of the antenna, are distorted when the tag is placed on or near a metal object.…”

Section: Effects Of Metal On Tag Antenna Performancementioning

confidence: 99%

Performance-Optimized Quadrate Bowtie Rfid Antennas for Cost-Effective and Eco-Friendly Industrial Applications

Amin

Chen²,

Tenhunen³

et al. 2012

PIER

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Abstract-Fully integrated printed RFID antennas show potential solution for item level labeling applications. In order to accommodate the antenna during the package printing process, it is vastly preferred that antenna structures are printed on paper substrates. However, the electromagnetic properties and thickness of paper substrates are susceptible to change due to various environmental effects. Thus, adequately consistent in performance and material insensitive printed Quadrate Bowtie RFID antennas are proposed. This paper presents an in-depth efficient optimization for high performance tag antenna designs for operability in frequencies 866-868 MHz & 902-928 MHz. It is demonstrated that the proposed antennas can tolerate a considerable variation in the permittivity on thin paper substrates, and present benchmarking results when n across metal and water containing objects.

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Section: Effects Of Metal On Tag Antenna Performancementioning

confidence: 99%

Performance-Optimized Quadrate Bowtie Rfid Antennas for Cost-Effective and Eco-Friendly Industrial Applications

Amin

Chen²,

Tenhunen³

et al. 2012

PIER

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“…The approach developed here is very flexible and utilizes the inherent capability of Microwave studio to execute Visual Basic for Applications (VBA) programs. The general idea of this method is that Matlab and CST Microwave studio can interchange information using external text files, which can be read and written by both programs [33]. The PSO-NM algorithm is used to adjust the relative phase shifts and the amplitudes of the excitations of the array elements for beam synthesis in a mutual coupling environment.…”

Section: Introductionmentioning

confidence: 99%

An Interaction Study Between Pifas Handset Antenna and a Human Hand-Head in Personal Communications

Montaser¹,

Mahmoud²,

Elmikati³

2012

PIER B

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Abstract-In this paper, the interaction of a planar inverted-F antennas array, mounted on a mobile handset, with a human hand-head phantom is investigated in the 1.9 GHz band. The hybrid approach involving the particle swarm optimization (PSO) and Nelder-Mead (NM) algorithm is considered to optimize the complex excitations of the adaptive array elements in a mutual coupling environment for different beamforming synthesis. Firstly, the effect of the human handhead on the handset radiation characteristics is studied. Then, the spatial-peak specific absorption rate (SAR) values of 2-and 4-element PIFA arrays for mobile handset in the vicinity of a human handhead are evaluated numerically for different scenarios. The antenna is analyzed completely using finite difference time domain (FDTD) method while the interaction is performed using the CST Microwave Studio software.

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“…A PIFA consists of a conductive top plate lying over a finite-sized ground plane, which are interconnected through a feeding wire and a shorting strip. The radiation characteristics and performance of PIFA can be adjusted by altering the dimensions of the feeding and shorting elements [10][11][12][13], the size and contour of the top conductive plate, or the size of the ground plane.…”

Section: Introductionmentioning

confidence: 99%

A small broadband switched-beam Cross-PIFA for m-WiMAX applications

Nikolopoulos

Capsalis

2012

Journal of Electromagnetic Waves and Applications

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A small broadband and low cost switched-beam smart antenna suitable for mobile WiMAX applications (band class 5-3.5 GHz) is presented in this paper. Present mobile terminal antennas are expected to show increased bandwidth as well as low-loss impedance matching while maintaining low-profile geometry. The proposed structure consists of four planar inverted-F antennas (PIFA) connected forming a cross, sharing the same ground plane, in a configuration designed for symmetrical coverage of the horizontal plane (Cross-PIFA). A custom genetic algorithm (GA) is used in order to optimize the proposed antenna parameters regarding resonant frequency and radiation pattern orientation angle and beamwidth. The optimized antenna exhibits small size (dimensions 7:19 Â 7:19 cm), satisfactory directivity for mobile terminal applications of 3.38 dB over an operation bandwidth of 120 MHz around the central frequency of 3.5 GHz. Simulation and measurement results and parameters range are exposed below followed by the according radiation pattern and variation of the VSWR indicating consistency between design and implementation. IntroductionWith the rapid growth of wireless mobile communication technology and the demand for broadband applications with high data rates and quality of service, the world is looking for a new potentially disruptive technology. Mobile WiMAX (Worldwide Interoperability for Microwave Access) is one of wireless communication technologies that can support data access up to 80 Mbps and wide coverage area. Mobile WiMAX system is based on OFDM/ OFDMA technology which offers scalability in both radio access technology and network architecture, thus providing a great deal of flexibility in network deployment options and service offerings. This approach has several key advantages over the traditional CDMA-based 3G systems. The mobile WIMAX technology is an ideal mean for a new generation of mobile web applications that are being supplemented by a simultaneous shift in consumer behavior. The major change in the consumer behavior can be summarized as a strong move towards mobility. In that case, more and more attention is being paid to the design of new handsets offering wider bandwidth, interference cancelation, multipath fading mitigation, direction of arrival destination, etc. [1][2][3][4].Switched parasitic arrays (SPAs) are considered an attractive alternative to fully adaptive arrays due to their low development and maintenance costs, while at the same time their

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Hybrid Pifa-Patch Antenna Optimized by Evolutionary Programming

Cited by 21 publications

References 20 publications

Performance-Optimized Quadrate Bowtie Rfid Antennas for Cost-Effective and Eco-Friendly Industrial Applications

Performance-Optimized Quadrate Bowtie Rfid Antennas for Cost-Effective and Eco-Friendly Industrial Applications

An Interaction Study Between Pifas Handset Antenna and a Human Hand-Head in Personal Communications

A small broadband switched-beam Cross-PIFA for m-WiMAX applications

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