A Low-Profile Frequency- and Pattern-Reconfigurable Antenna

Selvam, Yogeshwari Panneer; Kanagasabai, Malathi; Alsath, M. Gulam Nabi; Velan, Sangeetha; Kingsly, Saffrine; Subbaraj, Sangeetha; Rao, Y. V. Ramana; Srinivasan, Raju; Varadhan, Abhai Kumar; Karuppiah, Meenakshisundaram

doi:10.1109/lawp.2017.2759960

Cited by 67 publications

(41 citation statements)

References 18 publications

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“…Liquid crystal technology is used in [21] to produce the frequency and pattern reconfigurability in the antenna. In [22], frequency and pattern reconfigurability are achieved using slits connected through PIN diodes with the main radiating part. The designed antenna in [22] can only tilt the radiation pattern at 30 • , 0 • , −30 • .…”

Section: Introductionmentioning

confidence: 99%

“…In [22], frequency and pattern reconfigurability are achieved using slits connected through PIN diodes with the main radiating part. The designed antenna in [22] can only tilt the radiation pattern at 30 • , 0 • , −30 • . A flexible antenna for 1.9 G and 2.4 G is proposed in [23] with frequency tuning and beam switching characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Frequency and Pattern Reconfigurable Antenna for Emerging Wireless Communication Systems

et al. 2019

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A printed and minimal size antenna having the functionality of frequency shifting as well as pattern reconfigurability is presented in this work. The antenna proposed in this work consists of three switches. Switch 1 is a lumped switch that controls the operating bands of the antenna. Switch 2 and Switch 3 controls the beam switching of the antenna. When the Switch 1 is ON, the proposed antenna operates at 3.1 GHz and 6.8 GHz, covering the 2.5-4.2 GHz and 6.2-7.4 GHz bands, respectively. When Switch 1 is OFF, the antenna operates only at 3.1 GHz covering the 2.5-4.2 GHz band. The desired beam from the antenna can be obtained by adjusting the ON and OFF states of Switches 2 and 3. Unique beams can be obtained by different combination of ON and OFF states of the Switches 2 and 3. A gain greater than 3.7 dBi is obtained for all four cases.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Frequency and Pattern Reconfigurable Antenna for Emerging Wireless Communication Systems

et al. 2019

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“…Three BAR64‐03W PIN diodes with 2.1 Ω series resistance, 1.8 nH inductance during the ON state and reverse resistance of 3 kΩ, shunt capacitance of 0.17 pF in the OFF state are used to enable reconfiguration. The RF signal and the DC lines are isolated using 20 pF DC blocking capacitor and 33 nH RF choke inductor . The overall size of the proposed reconfigurable filter is 30 × 18 mm.…”

Section: Evolution and Design Detailsmentioning

confidence: 99%

“…The RF signal and the DC lines are isolated using 20 pF DC blocking capacitor and 33 nH RF choke inductor. [22][23][24] The overall size of the proposed reconfigurable filter is 30 3 18 mm. The proposed work shows 56% size reduction when compared to the metamaterial based microwave device 19 designed for the same lower operating band.…”

Section: Evo Lut Io N and D Es I Gn Det Ai Lsmentioning

confidence: 99%

Multi-band reconfigurable microwave filter using dual concentric resonators

Kingsly

Kanagasabai

Alsath

et al. 2018

Int J RF Microw Comput Aided Eng

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This article presents the design and testing of a novel frequency reconfigurable microwave filter. The filter structure is composed of an all stop resonator coupled with C‐ and E‐shaped parasitic resonators. PIN diodes are located at suitable positions to achieve multi‐band reconfiguration from 1.2 to 3.2 GHz making the filter suitable for multiple wireless communication systems. The frequency and bandwidth of the filter are governed by the length of the resonators and coupling between the resonators and the transmission line, respectively. A sharp rejection of −30 dB is observed between the passbands. The proposed filter offers 56% size reduction with flat group delay performance. The prototype filter is fabricated and the simulation results are validated using experimental measurements. The measurement results show good agreement with the simulation results.

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“…Frequency reconfigurability, in most cases, was focused on switching the operating bands while preserving another reconfigurable functionality. Among some of the recent examples [222,[225][226][227][228], the multilayer series-fed array in [229], the segmented multi-patch antenna in [228] were designed for beam-steering, while they could still switch the frequency to three and four bands, respectively.…”

Section: Antennas With Multiple Reconfigurability Functionsmentioning

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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A Low-Profile Frequency- and Pattern-Reconfigurable Antenna

Cited by 67 publications

References 18 publications

Frequency and Pattern Reconfigurable Antenna for Emerging Wireless Communication Systems

Frequency and Pattern Reconfigurable Antenna for Emerging Wireless Communication Systems

Multi-band reconfigurable microwave filter using dual concentric resonators

Reconfigurable antennas with single and multiple reconfigurability functions for wireless communications

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