Self-structuring antennas

Coleman, C.M.; Rothwell, Edward J.; Ross, John E.; Nagy, Lajos

doi:10.1109/map.2002.1028730

Cited by 47 publications

(13 citation statements)

References 4 publications

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“…SSA dynamically alters the antenna aperture so as to maximize signal-to-noise ratios (SNR) in varying RF environments (see Fig. 4b) [17]. The proposed antenna aperture is made up of antenna elements connected via RF relays, which are turned on or off to form and maintain the optimum aperture for the perceived RF environment.…”

Section: Ultra Low-power Wireless Sensor Nodementioning

confidence: 99%

Overview of a cyber-enabled wireless monitoring system for the protection and management of critical infrastructure systems

Lynch

Kamat

et al. 2009

SPIE Proceedings

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The long-term deterioration of large-scale infrastructure systems is a critical national problem that if left unchecked, could lead to catastrophes similar in magnitude to the collapse of the I-35W Bridge. Fortunately, the past decade has witnessed the emergence of a variety of sensing technologies from many engineering disciplines including from the civil, mechanical and electrical engineering fields. This paper provides a detailed overview of an emerging set of sensor technologies that can be effectively used for health management of large-scale infrastructure systems. In particular, the novel sensing technologies are integrated to offer a comprehensive monitoring system that fundamentally addresses the limitations associated with current monitoring systems (for example, indirect damage sensing, cost, data inundation and lack of decision making tools). Self-sensing materials are proposed for distributed, direct sensing of specific damage events common to civil structures such as cracking and corrosion. Data from self-sensing materials, as well as from more traditional sensors, are collected using ultra low-power wireless sensors powered by a variety of power harvesting devices fabricated using microelectromechanical systems (MEMS). Data collected by the wireless sensors is then seamlessly streamed across the internet and integrated with a database upon which finite element models can be autonomously updated. Life-cycle and damage detection analyses using sensor and processed data are streamed into a decision toolbox which will aid infrastructure owners in their decision making.

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Section: Ultra Low-power Wireless Sensor Nodementioning

confidence: 99%

Overview of a cyber-enabled wireless monitoring system for the protection and management of critical infrastructure systems

Lynch

Kamat

et al. 2009

SPIE Proceedings

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“…A self-structuring antenna [4] could be a valuable solution for a Cospas-Sarsat user terminal antenna at 406MHz. A self-structuring antenna is made of a combination of wires or strips interconnected by controllable switches.…”

Section: Introductionmentioning

confidence: 99%

A reconfigurable layout for a self-structuring life-jacket-integrated antenna of a SAR system

Baroni

Nepa

Rogier

2015

2015 IEEE International Symposium on Antennas and Propagation &Amp; USNC/URSI National Radio Science Meeting

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Abstract-A reconfigurable layout to implement a selfstructuring wearable antenna for the local user terminal of a Search and Rescue system (Cospas-Sarsat at 406MHz) is presented. The proposed antenna layout has been designed for integration on a commercial life jacket for use in a maritime environment. The shape of the antenna can be reconfigured by means of RF switches to ensure the best possible transmission conditions, in terms of overall antenna efficiency, even if part of the antenna goes under the sea level. The shape of the components of the self-structuring antenna has been optimized for different antenna positions with respect to the water level and immersion angles.

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“…This paper presents the development of the GEN 2C antenna, which is a smaller version of the GEN 2B but is expected to provide similar or better SNR despite its smaller aperture thanks to better impedance matches between the feed lines and the apertures. As in the case of GEN2B, GEN 2C also utilizes the self-structuring feed feature of the Self-Structuring Antenna (SSA) configuration and has four distinct broad beams [8]. Any one of the beams can be selected in an adaptive fashion based on the Received Signal Strength Indicator (RSSI) with the aid of a control algorithm and DC control signals, which drive the RF switches on the antenna aperture.…”

Section: Introductionmentioning

confidence: 99%

“…The graphics used to represent the SSA aperture (on the right) in Figure 1 should not be taken as a particular antenna design and is used only to draw a contrast with the conventional fixed aperture (shown on the left). SSA technology is well documented in the literature with various applications [8]. Figure 1 shows the antenna board with a female SMA connector for RF and a 5-wire connector for DC control (Ground, Supply, and three independent control voltages).…”

Section: Introductionmentioning

confidence: 99%

Smart antenna technology for structural health monitoring applications

et al. 2010

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A smart antenna has been developed for structural health monitoring. The antenna is based on Monarch's GEN 2 selfstructuring antenna (SSA) technology and provides polarization and beam-diversity for improving signal-to-noise ratio (SNR). The antenna works with University of Michigan's Narada platform, where a microcontroller monitors the RSSI and selects the best beam to maintain reliable RF link. Antenna has two wide beams for each polarization and the beams are selected by applying appropriate DC voltages to the RF switches on the antenna aperture. Paper presents the GEN C antenna, which is a smaller version of the GEN 2B with comparable performance features.

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Self-structuring antennas

Cited by 47 publications

References 4 publications

Overview of a cyber-enabled wireless monitoring system for the protection and management of critical infrastructure systems

Overview of a cyber-enabled wireless monitoring system for the protection and management of critical infrastructure systems

A reconfigurable layout for a self-structuring life-jacket-integrated antenna of a SAR system

Smart antenna technology for structural health monitoring applications

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