Performance of shorted microstrip patch antennas for mobile communications handsets at 1800 MHz

Rowley, Jack; Waterhouse, R.B.

doi:10.1109/8.774135

Cited by 67 publications

(31 citation statements)

References 19 publications

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“…Professors Jim James and Peter Hall have created a large body of work on this topic [1][2][3][4][5][6][7][8][9]. This work has since been extended by other authors [10][11][12][13]. The size of the patch antenna cab be reduced by using shorting pins; shorting walls; slots; ceramic materials; fractals and folded patches and ground planes [14][15][16][17][18].…”

mentioning

confidence: 99%

Microstrip patch antennas with 3-dimensional substrates

Whittow

2012

2012 Loughborough Antennas &Amp; Propagation Conference (LAPC)

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mentioning

confidence: 99%

Microstrip patch antennas with 3-dimensional substrates

Whittow

2012

2012 Loughborough Antennas &Amp; Propagation Conference (LAPC)

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“…Figure 4 shows the current distributions in radiating E-shaped radiating element at 900 MHz and 1800 MHz respectively. The excitation of feeding port induces high magnitude surface current in proximity of feed but weak or null current in the area far from the feed [5]. Further, the weak surface current on the ground plane ensures the better antenna performance by reducing the specific absorption rate (SAR), where power coupled to human tissues when antenna is in proximity to users head.…”

Section: Current Distributionsmentioning

confidence: 99%

Performance analysis of E-shaped dual band antenna for wireless hand-held devices

Rajagopal

Rajasekaran

2015

Hum. Cent. Comput. Inf. Sci.

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Due to evolution in wireless applications, the high performance dual band handsets were blooming in the market. In this paper, a compact dual band E shaped planar inverted F antenna is presented, which is suitable for GSM application in handheld devices. Here, antenna is described for GSM (900 MHz and 1800 MHz), which covers (831 MHz -973 MHz and 1700 MHz -1918 MHz) 10 dB bandwidth. The designs and simulations are performed using Finite Difference Time Domain (FDTD) technique based General Electro Magnetic Simulator -Version 7.9 (GEMS-7.9). The performance analysis of E-shaped antenna also includes real world interaction between antenna element and Spherical human head model composed of three layers, skin, skull and brain. The simulated results including, S-Parameter, radiation pattern, current distributions and Specific absorption rate, thermal distributions have validated the proposed E shaped antenna design as useful for compact mobile phone devices with comparatively low average Specific Absorption Rate in market.

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“…Until now, numerical modeling has been almost exclusively used in order to predict the power dissipation resulting from near-field interactions between a source and a lossy object or scatterer [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Analytical Lower and Upper Bounds of Power Absorption in Near-Field Regions Deduced From a Modal-Based Equivalent Junction Model

Derat¹,

Bolomey²

2006

PIER

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Abstract-Due to the proximity of mobile phones to users' heads and resulting interrogations on potential health effects, as well as to the development of promising medical applications of electromagnetic waves such as non-invasive RF Hyperthermia treatments, near-field interactions between antennas and lossy scatterers, such as human beings, have been a topic of growing interest over the last decade. More generally, for various kinds of radiating sources and targets, much scientific effort has been done to answer the following question in particular configurations: what is the minimal/maximal power that can be absorbed in a lossy object located in the reactive field region of an antenna? The aim of this paper is to propose a general and analytical solution to this problem, applicable to any sourcescatterer system. To this purpose, a method, allowing to describe power deposition mechanisms in near-field regions, is introduced. This approach is based on an equivalent junction/circuit model which is shown here to result from an appropriate modal expansion of the radiated field. The dual interpretation of this model in terms of localized circuit and lumped junction is used to demonstrate how trends and bounds in power absorption phenomena can be derived. Firstly, the analogy with the microwave circuit theory provides the concepts of available power and load factor for electromagnetic fields, which allow to highlight the parameters influencing power dissipation and to analyze consequent trends. Secondly, the junction matrix 22 Derat and Bolomey formalism is used to obtain analytical lower and upper bounds of the power absorbed in a lossy object, located in the near field region of any radiating source. Those bounds give a clearer insight of the relationship between the total radiated power due to the antenna and the minimal or maximal power potentially dissipated in any scatterer exposed to such a radiated field. An example of bounds in a simple source-load configuration is finally provided, showing the link, to be further investigated, between the near-zone electric-field pattern of the antenna and the total dissipated power. This example also suggests that the power dissipated in a given object can be rapidly increased or reduced as the modal complexity of the source increases.

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Performance of shorted microstrip patch antennas for mobile communications handsets at 1800 MHz

Cited by 67 publications

References 19 publications

Microstrip patch antennas with 3-dimensional substrates

Microstrip patch antennas with 3-dimensional substrates

Performance analysis of E-shaped dual band antenna for wireless hand-held devices

Analytical Lower and Upper Bounds of Power Absorption in Near-Field Regions Deduced From a Modal-Based Equivalent Junction Model

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