Performance and electromagnetic compatibility analysis of antennas for hand held mobile telephones

Shtrikman, Ilan; Lindenborn, Herbert; Fruechting, Henning

doi:10.1109/euma.1996.337564

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…The move to higher frequencies for mobile communications services will allow the possible use of more sophisticated directional antenna types on mobile communications handsets. However, it has also been reported that for some environments an omnidirectional pattern reduces the probability of poor call quality performance, but as the number of indirect paths increases this advantage vanishes [30]. As the higher frequency services are likely to be used in built up areas involving complex multipath propagation paths shorted-patch antennas could be used on handsets.…”

Section: Discussionmentioning

confidence: 98%

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

Rowley

Waterhouse²

1999

IEEE Trans. Antennas Propagat.

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We have investigated the application of two different types of novel shorted-patch antennas for mobile communications handsets at 1800 MHz. A single shorted-patch and a stacked shorted-patch antenna offering improved bandwidth are compared with data for a =4 monopole. The finite-difference time-domain (FDTD) technique was used to calculate antenna characteristics such as impedance and radiation patterns for two cases: on a handset and on a handset near a (2.5-mm voxel) heterogeneous head model in an actual position of phone use. We also obtained specific absorption rate (SAR) distributions and calculated the spatial peak 1-g SAR values. In addition, the effect on SAR and antenna characteristics of including a block model of the hand was assessed. Similar performance is achieved from the single or stacked shorted-patch antenna with the latter providing greater bandwidth, 8.2% versus 9.4% with the head and hand included. Both antennas reduce the 1-g spatial peak SAR value in the head by 70% relative to the monopole. The presence of the hand reduces the efficiency of all three antenna types by approximately 10%.

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Section: Discussionmentioning

confidence: 98%

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

Rowley

Waterhouse²

1999

IEEE Trans. Antennas Propagat.

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“…Because of their comparatively large power, portable (0.5-5W) and mobile (5-50 W) units represent significant danger to their users. [1][2][3]. Approximately half the radiated power of a hand-held mobile phone is absorbed in a person's head [4].…”

Section: Introductionmentioning

confidence: 99%

On applications of self-phased array antennas to mobile communications

Loyka¹,

Mordachev²

Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194)

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Novel printed bow-tie antennas for dual-band dual-mode mobile handsets

Serrano-Vaello¹,

Sánchez‐Hernández²

1998

IEE Colloquium on Adaptable and Multi-Standard Mobile Radio Terminals

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The recent developments of dual-band dual-mode D-AMPSIAMPS mobile handsets and radiostations has added pressure on GSM service providers to follow similar technology breakthroughs as a first step towards UMTSRPLMTS. A frequency agile device accommodating bothL GSM standard frequency bands would serve more than 25 million GSM subscribers, with expectations as high as 100 millions subscribers by the year 2000. The complexity of the spectrum sharing between the two technologies and service generations may be alleviated by all terminal, system and network technologies. 111 this paper, several attempts to accomplish dual-band GSM/DCS 1800 operation on a single handset employing dual-band antenna concepts are introduced, and novel printed antenna elements developed at the Universidad Politicnica de Valencia are described.

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Performance and electromagnetic compatibility analysis of antennas for hand held mobile telephones

Cited by 5 publications

References 6 publications

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

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

On applications of self-phased array antennas to mobile communications

Novel printed bow-tie antennas for dual-band dual-mode mobile handsets

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