Direction-of-arrival estimation using radiation power pattern with an ESPAR antenna

Taillefer, Eddy; Hirata, Akifumi; Ohira, Takashi

doi:10.1109/tap.2004.841312

Cited by 88 publications

(101 citation statements)

References 9 publications

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“…3 shows an example of the measured radiation pattern of an ESPAR antenna. According to the 1SV287 variable reactance specification, the allowable range of the bias voltage is from 20 to [21]. If the bias voltage is given by an 8-bit resolution digital value, the number of radiation patterns that an -element ESPAR antenna can form is .…”

Section: Variation Performancementioning

confidence: 99%

Wireless secret key generation exploiting reactance-domain scalar response of multipath fading channels

Aono

Higuchi

Ohira

et al. 2005

IEEE Trans. Antennas Propagat.

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275

166

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Section: Variation Performancementioning

confidence: 99%

Wireless secret key generation exploiting reactance-domain scalar response of multipath fading channels

Aono

Higuchi

Ohira

et al. 2005

IEEE Trans. Antennas Propagat.

Self Cite

275

166

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“…The algorithm determines the position exploiting the pattern cross correlation approach proposed in [19], and modified in [20] to performs as a MuSiC-like algorithm. On the basis of the model in (4), it is possible to analytically estimate the minimum variance of any unbiased estimator based on the same approach.…”

Section: Localization Strategymentioning

confidence: 99%

A distributed positioning system based on real-time RSSI enabling decimetric precision in unmodified IEEE 802.11 networks

Maddio

Passafiume

Cidronali

et al. 2015

2015 IEEE MTT-S International Microwave Symposium

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Abstract-In this paper we present a distributed positioning system for indoor environments based on a network of compact independent anchor nodes operating as specialized WiFi access points. Each node is built with component-off-the-shelves and it is capable of standard IEEE 802.11 connectivity at 2.45 GHz. The enabling technology for the localization is the Switched Beam Antenna (SBA) equipped in each node, which permits a space division multiple access at network-level.The positional information is the result of a maximum likeli hood estimation driven by the expected signal space partition of the constellation, and it is tolerant to noisy power measurements, such as Received Signal Strength Indicator, thanks to angular filtering capability of the SBA, which in addition operates in circular polarization.Experimental validations demonstrate the performance of a 3-anchors network, operating within the IEEE 802.11 protocol, monitoring a single nomadic node inside a 7 m 2 indoor square area. It results that 68% of the square area is covered with a localization error below 50 cm, with a mean error of 47 cm.Inside the triangular mesh defined by the three anchors, the mean error drops to 39cm, with 88% of the area being below 50 cm. In addition, the maximum error is always below 77 cm.Index Terms-Indoor positioning system, Received Signal Strength Indicator (RSSI), Switched beam antenna.

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“…The ESPAR antenna is a type of reactively steerable array antenna and a single-port array antenna with only one central active element surrounded by several reactively controlled parasitic radiating elements. The ESPAR antenna pattern is controlled by adjusting the reactance load values, including capacitance and inductance [1][2][3][4][5][6]. The ESPAR antenna has been developed using various parasitic structures, such as monopoles [5], dipoles [6], and patch antennas [7].…”

Section: Introductionmentioning

confidence: 99%

Planar Directional Beam Antenna Design for Beam Switching System Applications

Lee¹,

Yoon²,

Han³

2017

Journal of electromagnetic engineering and science

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In this paper, a planar directional beam-switchable antenna with four orthogonal beam directions is proposed. The proposed antenna is designed with two crossed active elements and two parasitic elements for each direction. The design methodology is described on the basis of the Yagi-Uda method for the active and parasitic elements, respectively. By adjusting the effective electric lengths of the parasitic elements, the roles of a director and a reflector are exchanged with each other. The planar four-way beam-switchable Yagi-Uda antenna is implemented. From the experimental results. The proposed design method is verified for orthogonal radiation beam switching. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ⓒ

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Direction-of-arrival estimation using radiation power pattern with an ESPAR antenna

Cited by 88 publications

References 9 publications

Wireless secret key generation exploiting reactance-domain scalar response of multipath fading channels

Wireless secret key generation exploiting reactance-domain scalar response of multipath fading channels

A distributed positioning system based on real-time RSSI enabling decimetric precision in unmodified IEEE 802.11 networks

Planar Directional Beam Antenna Design for Beam Switching System Applications

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