Switched-Band Vivaldi Antenna

Hamid, M. R.; Gardner, P.; Hall, Peter; Ghanem, F.

doi:10.1109/tap.2011.2122293

Cited by 95 publications

(48 citation statements)

References 13 publications

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“…According to the literature, antennas used in CR systems can be divided into two categories [8], the one-and the two-port structures. The first category consists of using one antenna that can act as a UWB or narrowband, depending on the requested task [9]- [11]. While the second category consists of using an antenna system composed of two antennas [12]- [14], one for sensing and the other for communication task.…”

Section: Introductionmentioning

confidence: 99%

Dual Port Antenna Combining Sensing and Communication Tasks for Cognitive Radio

Nachouane

Najid

Tribak

et al. 2016

International Journal of Electronics and Telecommunications

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Abstract-Dynamic spectrum access has been proposed as the effective solution to overcome the spectrum scarcity issue, supported by cognitive radio technology. Sensing and communication functions are both the most important tasks in cognitive radio systems. In this paper, an antenna system combining sensing and communication tasks is proposed to be integrated into cognitive radio front-ends. The sensing task is performed by means of an ultra-wideband quasi-omnidirectional antenna. Whilst the communication task is ensured by using a narrowband antenna. Both antennas have been designed on the same layer of an FR4 substrate, for manufacturing cost constraint. Therefore, the isolation between them must take into consideration. The measured mutual coupling of less than -18 dB is achieved over the whole impedance bandwidth. The proposed sensing antenna covers a wide range frequency bands ranging from 2 to 5.5 GHz. While the communication antenna operates at 2.8 GHz, and by adding inductors to the antenna, the resonant frequency can be tuned from 2.6 to 2.7 GHz. The whole antenna system was designed, fabricated, and tested. Measurement and simulation results prove the feasibility of the proposed structure for cognitive radio applications.

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Section: Introductionmentioning

confidence: 99%

Dual Port Antenna Combining Sensing and Communication Tasks for Cognitive Radio

Nachouane

Najid

Tribak

et al. 2016

International Journal of Electronics and Telecommunications

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“…Also, in what's coming, bandpass and bandstop modes are used in the same way as in [8,10]. Bandpass mode designates a mode where the resonator acts as a bandpass filter, passing frequencies corresponding to roughly λ/2 and blocking the remaining frequencies.…”

Section: Proposed Approachmentioning

confidence: 99%

“…The frequency reconfiguration usually consists in translating the operating band [2], creating new bands [3][4][5], but an important proportion of them consists in switching between a wideband mode and one of its sub-bands [6][7][8][9]. This last category of reconfigurable antennas is of particular interest for the proposed context as they allow varying the operating bandwidth.…”

Section: Introductionmentioning

confidence: 99%

A Four Bandwidth-Resolution Uwb Antipodal Vivaldi Antenna

Bitchikh¹,

Ghanem²

2017

PIER M

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Abstract-In this paper, a frequency reconfigurable Antipodal Vivaldi Antenna (AVA), capable of covering a Band of Interest (BoI) spanning from 3 to 10.6 GHz with four different bandwidth resolutions, is presented. By incorporating four rectilinear resonators and two Split-Ring-Resonators (SRRs) into the AVA, the whole BoI can be covered by one (UWB mode), three (3-sub mode), seven (7-sub mode), or sixteen (16-sub mode) sub-bands. In the UWB-mode, all the six resonators are deactivated by disrupting their structures, so the antenna operates as a classical AVA. In the 3-sub mode, only one rectilinear resonator is activated; the low Q of these resonators allow narrowing the antenna operating band so that the BoI is covered by three sub-bands. In the 7-sub mode, two rectilinear resonators are activated at a time, which narrows the operating bandwidth furthermore, allowing to cover the BoI by seven sub-bands. In the 16-sub mode, one of the two SRRs is activated at a time to be used as a coupling-bridge to very narrow frequency bands that allows covering the BoI by sixteen different bands. To present the work, simulated and measured results are given and discussed.

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“…Some work on reconfigurable Vivaldi antennas has been reported in [5]- [7]. In [5], two rings are introduced to a Vivaldi antenna to obtain narrowband reconfiguration, however the gain that can be achieved is low, only up to 5.93 dBi.…”

Section: Introductionmentioning

confidence: 99%

High-gain frequency reconfigurable Vivaldi antenna

Borda-Fortuny

Tong

Chetty

et al. 2014

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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Abstract-This article proposes a frequency agile antenna whose operating frequency band can be switched. The design is based on a Vivaldi antenna. High-performance radio-frequency microelectromechanical system (RF-MEMS) switches are used to realize the 2.7 GHz and 3.9 GHz band switching. The low band starts from 2.33 GHz and works until 3.02 GHz and the high band ranges from 3.29 GHz up to 4.58 GHz. The average gains of the antenna at the low and high bands are 10.9 and 12.5 dBi, respectively. This high-gain frequency reconfigurable antenna could replace several narrowband antennas for reducing costs and space to support multiple communication systems, while maintaining good performance.

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Switched-Band Vivaldi Antenna

Cited by 95 publications

References 13 publications

Dual Port Antenna Combining Sensing and Communication Tasks for Cognitive Radio

Dual Port Antenna Combining Sensing and Communication Tasks for Cognitive Radio

A Four Bandwidth-Resolution Uwb Antipodal Vivaldi Antenna

High-gain frequency reconfigurable Vivaldi antenna

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