Reconfigurable Parasitic Element Antenna Using Reflection Phase Shifters

Fezai, Faycel; Menudier, Cyrille; Thévenot, Marc; Arnaud, Éric; Monédière, Thierry

doi:10.1109/lawp.2014.2377592

Cited by 9 publications

(2 citation statements)

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“…In Shi et al (2012), the monopole antenna is connected to the parasitic elements for improving the gain (it acts as director). Similarly, the radiation properties can be altered by the element shifting in phased array antennas (Fezai et al, 2015). Another method like orbital angular momentum (Sane et al, 2018) is used for obtaining pattern reconfiguration.…”

Section: Pattern Reconfigurationmentioning

confidence: 99%

Reconfigurable Antennas and Their Practical Applications—A Review

Subbaraj,

Thomas

2023

Radio Science

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This paper presents the review on the design of various reconfigurable antennas and their applications in the current scenario. There are more challenges involved in the design of these antennas. This paper also describes the various methods used for reconfiguring the frequency bands. The single parameter reconfiguration and hybrid reconfiguration examples are analyzed with their performances. The parameters such as gain, efficiency, and size of the existing antenna is compared. The various switches deployed in the antenna for achieving the reconfiguration are presented in this paper. The switches such as pin diodes, varactor diodes, MEMS, and mechanical switching are also elaborated with their corresponding merits and demerits. The diodes are switched on and off to activate and deactivate the structure of the antenna. Similarly, mechanical actuators are used for mechanical switching mechanism. The polarization reconfiguration mechanism between linear and circular; pattern reconfiguration mechanism between directional and omnidirectional are reviewed with various examples. In addition to that, several designs of reconfigurable filtering antennas, MIMO antennas are also reviewed in detail.

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Section: Pattern Reconfigurationmentioning

confidence: 99%

Reconfigurable Antennas and Their Practical Applications—A Review

Subbaraj,

Thomas

2023

Radio Science

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“…Towards this, a microstrip-line based analog phase-shifter design is adoptable to minimise the insertion losses and achieve continuous beam scanning. Of the two possible configurations, the reflection-type phase-shifter (RTPS) offers a larger phase-tuning range and better matching than a transmission-line loaded phase-shifter (TLPS) [198,289]. However, the RTPS introduces more losses and occupies most of the limited space between patch-elements, which becomes challenging in a series-fed array.…”

Section: Tunable Phase-shifter Designmentioning

confidence: 99%

Reconfigurable antennas with single and multiple reconfigurability functions for wireless communications

Alam¹

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Antennas are an important core element of any communication system for transceiving signals in the form of electromagnetic radiation. Traditionally, antenna design and performance are optimised for fixed frequency, radiation and polarisation. However, modern electronic and wireless communication technologies necessitate compact and multifunctional antennas that are suitable for adapting in changing operating scenarios. As an alternative, reconfigurable antennas (RA), which have dynamic adaptability in such operating conditions, are impressive for improving system functionality and operational flexibility. Owing to the advantage of reconfigurability, an RA can be equivalent to several FPAs, thus provides compactness, minimises costs, and simplifies system integration. Antenna reconfiguration can be done with physical or mechanical modification, by electrical control by switching or tuning elements, by change of material properties, and via an optical switching scheme. However, due to the adopted control techniques and the antenna design process, RA performances often become non-uniform/inconsistent in different operating states. Besides, the use of multiple feeding, additional impedance matching networks, and compound controlling mechanisms, increases the antenna volume and control complexity. This research is focused on building compact size and low-profile RAs by means of simplified control mechanisms for achieving single-and multiple-reconfigurability functions and uniform reconfigurability performances in all reconfigurable states. The reconfigurable antenna concepts are developed aiming to avoid complicated feeding structures (external feeding and/or matching network) and lossy biasing arrangements (with a minimum number of active elements), as any mismatches or errors from those can affect the antenna performance. The single-function RAs are investigated for on-demand band-rejection reconfigurability, and 360˚ uniform beam-scanning with stable gain profiles. Due to the coexistence of several commonly used narrow band standards (WiMax and WLAN etc.) within the widely used ultra-wideband (UWB: 3.1-10.6 GHz), devices running simultaneously at these bands may suffer from in-band mutual interferences. To address this, the flexibility of on-demand band-rejection is offered with a lowprofile, simple construct and easy to control configuration. Unlike others, this antenna has reversibility and works in four modes-UWB, single and dual band-rejection modes. The operating mechanism of the reconfigurable band-rejection techniques is explained using circuit model and current distribution analysis at each mode to give a clear insight into the developed concept. Beam-steering reconfigurable antennas are desirable for a wide range of applications, such as mobiles, satellite communications, remote sensing, radar etc. While uniform pattern reconfigurability and 360˚ beam-scanning are generally looked for, antennas that lack structural and control symmetry suffer from limited or non-uniform scanning. Here, structural symmetry ...

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