Enhancing wireless security through reconfigurable antennas

Mookiah, Prathaban; Dandekar, Kapil R.

doi:10.1109/rws.2010.5434129

Cited by 8 publications

(4 citation statements)

References 9 publications

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“…Reconfigurable antennas are suitable for many applications especially when several operating modes are required from a single antenna. These applications include Multiple Input Multiple Output (MIMO) communication systems [1]- [9], cellular and personal communication systems [10]- [13], interference rejection [14], [15], wireless network security [16], and military applications [17]. A reconfigurable nano antenna is a reconfigurable antenna which operates in the optical range of frequency.…”

Section: Introductionmentioning

confidence: 99%

Optimization of a Novel Nano Antenna With Two Radiation Modes Using Kriging Surrogate Models

2018

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In this paper, a novel nano antenna with two radiation modes is introduced. The structure of this nano antenna consists of a ring coupler and two patch antennas placed on a SiO 2 substrate. The direction of the main lobe of the radiation pattern of this nano antenna can be adjusted to be either in the broadside or the endfire direction. The proposed nano antenna is optimized to minimize the losses and to maximize the radiation efficiency in addition to achieve maximum discrimination between the two desired directions of the main beam. In optimizing the proposed structure, the computationally expensive fullwave electromagnetic simulation is replaced by cheaper surrogate models, which are kriging models. Two optimization techniques, namely multi-objective particle swarm with preference ranking organization METHod for enrichment evaluations method and design centering using the normed distances, are used to obtain the optimal values of the design parameters. A convergence test is performed to ensure the validity of the obtained simulation results. A sensitivity analysis is performed to show how the manufacturing tolerance in each design parameter is affecting the performance of the proposed nano antenna.

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Section: Introductionmentioning

confidence: 99%

Optimization of a Novel Nano Antenna With Two Radiation Modes Using Kriging Surrogate Models

2018

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“…Pattern reconfigurable antennas were demonstrated to be an important solution to improve channel capacity and security in wireless communications [1] [2]. The antenna's radiation characteristic can be changed according to the wireless channel response, improving the Signal to Noise Ratio (SNR) and consequently, the data throughput [3].…”

Section: Introductionmentioning

confidence: 99%

Planar reconfigurable antenna with integrated switching control circuitry

Patron

Dandekar

2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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In this paper we propose a pattern reconfigurable planar antenna with integrated control circuitry, for flexible applications with Software Defined Radio (SDR) platforms. The antenna's layout is made by four folded microstrip elements placed symmetrically on a low cost FR-4 substrate. By using PIN diodes, the metallic elements can be switched to generate a single omnidirectional beam or six directional beams around the azimuth plane. The design includes MOSFET based control circuitry for switching the PIN diodes. The RF performance has been experimentally evaluated under different levels of control voltage. The radiation of omnidirectional and directional beams along with an integrated control board, allows for convenient utilization of the antenna in numerous SDR MIMO platforms.Index Terms-Adaptive and reconfigurable antennas, MIMO, Multiband and wideband antennas.

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“…In [5]- [10], authors used RAs in MIMO systems where they showed that since RAs provide additional degree of freedom in wireless communication, their usage in MIMO increases the performance of the systems in terms of capacity or SINR. In [11], authors utilize RAs to detect intruders in the environment. Tsai et al utilized switched multi-beam directional antennas to perform the subchannel allocation in the downlink by taking consideration of the fairness in [12].…”

Section: Introductionmentioning

confidence: 99%

On the performance of subcarrier allocation techniques for multiuser OFDM cognitive networks with reconfigurable antennas

Yılmaz

Abdallah

Qaraqe

et al. 2014

2014 IEEE Global Communications Conference

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Reconfigurable antennas (RA) have been viewed as a hardware-efficient alternative solution to multiple-input multipleoutput systems whereby network users can vary the antenna radiation patterns using a single antenna element to maximize the received signal strength. In this paper, we study the potential benefits of employing RA in multiuser orthogonal frequency division multiple access cognitive heterogeneous networks (HetNets) in terms of the overall network capacity. In cognitive HetNets, a secondary (unlicensed) network is allowed to share the spectrum with the primary (licensed) network under the condition that the interference level at the primary network is below a predetermined value. To account for this interference constraint, the secondary user (SU) can limit their transmission power and thus reducing substantially its performance. Moreover, the large number of users expected for next generation network brings dense interference to the secondary network and thus even efficient interference mitigation and resource allocation techniques can fail in maintaining the required performance level. Therefore, in this paper, we consider utilizing an RA at the SUs that acts as an additional resource which can be optimized by selecting the best state that maximizes the signal strength among the SUs and limits the mutual interference between the secondary and primary network. In particular, we propose a game theoretical framework for selecting the subcarriers based on best allocation techniques as well as the random antenna state selection that maximizes the overall capacity of the network while obeying the interference level in the primary network. We use potential games which guarantee the Nash equilibrium existence. Our results show that by selecting the optimal RA state and the subcarriers for each user, the capacity of the secondary network increases substitutionally with limited hardware complexity.

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Enhancing wireless security through reconfigurable antennas

Cited by 8 publications

References 9 publications

Optimization of a Novel Nano Antenna With Two Radiation Modes Using Kriging Surrogate Models

Optimization of a Novel Nano Antenna With Two Radiation Modes Using Kriging Surrogate Models

Planar reconfigurable antenna with integrated switching control circuitry

On the performance of subcarrier allocation techniques for multiuser OFDM cognitive networks with reconfigurable antennas

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