A comparison of switched pattern diversity antennas

Aubrey, Tim; White, Peter

doi:10.1109/vetec.1993.507017

Cited by 12 publications

(4 citation statements)

References 10 publications

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“…Most V2V or V2Icommunicationsystems have been designed based on the DSRC protocol [4,5].Compared with the omni-directional counterparts, a directional antenna would achieve a better transmit or receive gain in the target direction [7]. Another benefit of using directional antenna is the better immunity from co-channel interference and multipath fading [8]. TheMobiSteer project [9] studied V2I communication using thedirectional antenna.…”

Section: Related Workmentioning

confidence: 99%

Analysis of directional antenna for railroad crossing safety applications

Guha

Choi

et al. 2017

2017 14th IEEE Annual Consumer Communications &Amp; Networking Conference (CCNC)

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A rapidly deployable and cost-effective railroad crossing early warning system integrated with the railway system is attractive due to its protection of the unmanned grade crossings, which requires a warning system with longdistance communication link. In this paper, we investigate the problem of suitable antenna selection for such a railway warning system. First, the antenna criteria for railroad crossing safety applications are described based on practical system considerations, the safe distances on the road and on the railway. Then, the optimal antenna pattern is derived theoretically to get the smallest size which fits for the practical installation. We also conducted a feasibility study of an array antenna through measurements on a near field scanner 1 .

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Section: Related Workmentioning

confidence: 99%

Analysis of directional antenna for railroad crossing safety applications

Guha

Choi

et al. 2017

2017 14th IEEE Annual Consumer Communications &Amp; Networking Conference (CCNC)

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“…In Ref. , authors have quantitatively shown that pattern diversity significantly improves antenna performance in multi‐path reception environments. Pattern reconfigurable antennas are usually realized by phased arrays which are complex and large in size.…”

Section: Introductionmentioning

confidence: 99%

A reconfigurable dual‐beam planar antenna with beam switching capability

Lalithamma

Pathak

Manhas

2017

Micro & Optical Tech Letters

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A novel dual-beam planar antenna with pattern reconfigurable feature is presented in this article. The proposed design uses four antenna elements, two of which are connected at a time to provide dual-beam reconfigurability. Four PIN diodes are employed to achieve switching of the dual-beam in four directions. A prototype of the antenna is fabricated on FR4 substrate with a single coaxial feed and the results are validated by measurement. K E Y W O R D S dual-beam, microstrip antenna, pattern diversity, reconfigurable antenna, twin-beam antenna

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“…By focusing energy in one direction, a directional antenna can get a better transmit or receive gain for a targeted direction compared to an omnidirectional antenna [42,41,37]. In addition, directional antenna has the potential to provide a better immunity from co-channel interference [42,27,37] and multipath fading [14]. However, having a directional antenna alone is not sufficient for a moving vehicle.…”

Section: Introductionmentioning

confidence: 99%

MobiSteer

Navda

Subramanian

Dhanasekaran

et al. 2007

Proceedings of the 5th International Conference on Mobile Systems, Applications and Services

153

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In this work, we investigate the use of directional antennas and beam steering techniques to improve performance of 802.11 links in the context of communication between a moving vehicle and roadside APs. To this end, we develop a framework called MobiSteer that provides practical approaches to perform beam steering. MobiSteer can operate in two modes -cached mode -where it uses prior radio survey data collected during "idle" drives, and online mode, where it uses probing. The goal is to select the best AP and beam combination at each point along the drive given the available information, so that the throughput can be maximized. For the cached mode, an optimal algorithm for AP and beam selection is developed that factors in all overheads.We provide extensive experimental results using a commercially available eight element phased-array antenna. In the experiments, we use controlled scenarios with our own APs, in two different multipath environments, as well as in situ scenarios, where we use APs already deployed in an urban region -to demonstrate the performance advantage of using MobiSteer over using an equivalent omni-directional antenna. We show that MobiSteer improves the connectivity duration as well as PHY-layer data rate due to better SNR provisioning. In particular, MobiSteer improves the throughput in the controlled experiments by a factor of 2 -4. In in situ experiments, it improves the connectivity duration by more than a factor of 2 and average SNR by about 15 dB.

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A comparison of switched pattern diversity antennas

Cited by 12 publications

References 10 publications

Analysis of directional antenna for railroad crossing safety applications

Analysis of directional antenna for railroad crossing safety applications

A reconfigurable dual‐beam planar antenna with beam switching capability

MobiSteer

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