Reconfigurable Filter Antennas for Pulse Adaptation in Uwb Cognitive Radio Systems

Al‐Husseini, Mohammed; Safatly, Lise; Ramadan, Ali; El‐Hajj, Ali; Mervat, Madi; Christodoulou, and Christos

doi:10.2528/pierb11111807

Cited by 18 publications

(13 citation statements)

References 20 publications

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“…A conventional switchable antenna refers to a radiator capable of characteristic reconfiguration, either in terms of operating frequency, radiation patterns, polarizations or directivity through the control of RF switches [12][13][14][15][16][17][18][19][20][21][22]. These RF switches are only a small addition to the hardware requirements to enable this reconfigurable scheme and this research realize the utilization of silver loaded epoxy adhesive is effective in providing a solderless connection between the conductive textiles compared to larger and more complex elements such as phase shifters shown in Figure 1.…”

Section: Introductionmentioning

confidence: 97%

A NOVEL 2.45 GHz SWITCHABLE BEAM TEXTILE ANTENNA (SBTA) FOR OUTDOOR WIRELESS BODY AREA NETWORK (WBAN) APPLICATIONS

Jais¹,

Jamlos²,

Jusoh³

et al. 2013

PIER

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Abstract-A novel switchable beam textile antenna (SBTA) for wireless body area network (WBAN) applications is proposed. The SBTA is centrally-fed by a coaxial probe and the power distributed over four circular radiating elements. Four RF switches are integrated through which the SBTA is able to generate beam steering in four directions: 0 • , 90 • , 180 • , and 270 • , with a maximum directivity of 6.8 dBi at 0 • . Its small size (88 mm × 88 mm) and flexibility enables the structure to be easily integrated into safety jackets, rain coats, etc., for tracking, and search and rescue communication purposes. The structure successfully integrates reconfigurability into a wearable textile antenna.

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Section: Introductionmentioning

confidence: 97%

A NOVEL 2.45 GHz SWITCHABLE BEAM TEXTILE ANTENNA (SBTA) FOR OUTDOOR WIRELESS BODY AREA NETWORK (WBAN) APPLICATIONS

Jais¹,

Jamlos²,

Jusoh³

et al. 2013

PIER

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“…Recently, the reconfigurable UWB antennas have been developed for cognitive radio (CR) communications [25][26][27][28][29][30][31][32]. In the CR communication systems, unlicensed users (secondary users) can access spectrum bands licensed to primary users at a spectrum underlay mode or spectrum overlay mode, which is illustrated in Figure 1 [28].…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable Antennas for UWB Cognitive Radio Communication Applications

Li¹,

Wang²

2017

Cognitive Radio

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In this chapter, reconfigurable antennas are reviewed for ultra-wideband (UWB) cognitive radio communication applications. The defected microstrip structure (DMS) has been reviewed and integrated into the UWB antennas to form the desired filtering antennas which can filter out unexpected narrowband signal interferences. Then, switches are incorporated into the filtering UWB antennas to construct the cognitive radio UWB (CR-UWB) antenna to make the antenna switch between the UWB antenna and band-notched UWB antenna. In these CR-UWB antennas, the DMSs are to give the desired notches while the switches are used for realizing the switchable characteristics. Several reconfigurable antennas and CR-UWB antennas are created and investigated. The results show that the designed CR-UWB antenna can switch between different modes, making it amazing for UWB, band-notched UWB, and multiband communication system applications.

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“…Since the first report that permitted the commercial operation of ultra wideband (UWB) adopted by FCC (The Federal Communications Commission of the United States) in 2002 [1], many researchers have developed several antenna designs to enhance the impedance bandwidth of small antennas, to make it suitable for UWB applications [2][3][4][5][6]. Recently, the UWB technology has been regarded as one of the most promising wireless technologies that allows the revolutionizing highdata transmission rate and enables the personal area networking industry leading to new innovations and greater quality of services for mobile users [7].…”

Section: Introductionmentioning

confidence: 99%

Integrated Flexible Uwb/Nb Antenna Conformed on a Cylindrical Surface

Sahnoun¹,

Messaoudene²,

Denidni³

et al. 2015

PIER Letters

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Abstract-In this paper, an ultra-wideband (UWB) conformal monopole antenna integrated with a narrow-band (NB) rectangular slot antenna is designed and fabricated. The proposed structure consists of a circular disc monopole antenna printed on a cylindrical surface and fed by a coplanar waveguide line (CPW). A rectangular slot antenna, excited by a microstrip line, is integrated in the front of the UWB antenna. The simulations are performed using the CST Microwave Studio software. To validate the proposed antenna concept, an experimental prototype is fabricated and measured. The measured results show that the monopole antenna covers an ultra wideband from 2 GHz to 12 GHz with S 11 < −10 dB and provides a very good isolation with a transmission coefficient below −20 dB across the operating band. Compared to planar integrated antennas, the proposed conformed structure possesses an important wideband, which can be used in many wearable electronic applications and communication systems.

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Reconfigurable Filter Antennas for Pulse Adaptation in Uwb Cognitive Radio Systems

Cited by 18 publications

References 20 publications

A NOVEL 2.45 GHz SWITCHABLE BEAM TEXTILE ANTENNA (SBTA) FOR OUTDOOR WIRELESS BODY AREA NETWORK (WBAN) APPLICATIONS

A NOVEL 2.45 GHz SWITCHABLE BEAM TEXTILE ANTENNA (SBTA) FOR OUTDOOR WIRELESS BODY AREA NETWORK (WBAN) APPLICATIONS

Reconfigurable Antennas for UWB Cognitive Radio Communication Applications

Integrated Flexible Uwb/Nb Antenna Conformed on a Cylindrical Surface

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