Two port frequency reconfigurable antenna for cognitive radios

Ghanem, F.; Hall, Peter; Kelly, James R.

doi:10.1049/el.2009.0935

Cited by 84 publications

(46 citation statements)

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“…The narrowband antenna uses the disk monopole as a ground plane. As well for [16], the authors introduce a two-port antenna system that integrates two antennas, each one is designed on a side of the substrate. In order to get the narrowband response, two slots are used to act as a band-pass filter to suppress frequencies outside the desired frequency band.…”

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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show abstract

“…Currently, the cognitive radio system is not standardized [15]; the idea is to include the largest possible number of frequency bands. With these results, it is observed that the proposed prototype improves the bandwidth offered by other UWB antennas designed for Cognitive Radio such as [16][17][18][19][20], allowing to include a greater number of bands in the system. This antenna can be well employed in many communications systems, including cognitive radio applications.…”

Section: Simulation and Experimental Resultsmentioning

confidence: 70%

“…6. In these figures, at the XZ plane, quasi-omnidirectional patterns are obtained, so the prototype has an excellent performance compared to other planar antennas [17][18][19][20][21], which generally are not omnidirectional in all the bands. In Fig.…”

Section: Simulation and Experimental Resultsmentioning

confidence: 90%

“…In Fig. 7 the maximum gain values taken every 200 MHz on the XZ plane are depicted, where there is a good performance of the antenna in the bands of interest, achieving the possibility to transmit with less power compared to other antennas [18,20]. The peak average gain of the antenna over the bandwidth is around 4.3 dBi.…”

Section: Simulation and Experimental Resultsmentioning

confidence: 96%

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Ultra-Wideband Slotted Disc Antenna Compatible With Cognitive Radio Applications

Gomez-Nuñez¹,

Jardón‐Aguilar²,

Tirado‐Méndez

et al. 2012

PIER Letters

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Abstract-In this paper, a new ultra-wideband (UWB) disc antenna compatible with cognitive radio is presented. The proposed antenna is developed to operate from 0.77 to 11.23 GHz. It consists of a circular disc radiator with a rectangular slot on the patch and the implementation of the bevel technique on the ground plane. A prototype of the antenna has been constructed and shows adequate impedance matching, radiation pattern and gain for cognitive radio applications.

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“…DSA consists of spectrum sensing and spectrum decision. Spectrum sensing identifies unused frequency bands via direct sensing of the frequency band by using a matched filter, energy detector (Ghasemi & Sousa, 2008) or frequency reconfigurable antenna (Ghanem & Kelly, 2009). The sensing reliability can also be greatly increased by using a cooperative algorithm (Shen, Liu, Zeng, Xie, Gao & Liu, 2009).…”

Section: Introductionmentioning

confidence: 99%

Supporting Differentiated Service in Cognitive Radio Wireless Mesh Networks

How¹

2010

CIS

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The MAC layer protocols utilizing enhanced distributed channel access (EDCA) in the recently published IEEE 802.11-2007 are able to provide differentiated QoS for different traffic types in wireless networks through varying the Arbitration Inter-Frame Spaces (AIFS) and contention window sizes. However, the performance of high priority traffic can be seriously degraded in the presence of strong noise over the wireless channels. The noise problem is further aggravated in wireless mesh networks when packets traverse multiple-hops from source to destination. The noise problem can be mitigated by distributing network traffic across multiple vacant channels to reduce the node density per transmission channel. Although multiple non-overlapped channels exist in the 2.4GHz and 5GHz spectrum, most IEEE 802.11-based multi-hop ad hoc networks today use only a single channel at anytime. As a result, these networks cannot fully exploit the aggregate bandwidth available in the radio spectrum provisioned by the standards. In this paper, we propose the Power-Controlled Rate-Adaptive MAC (CPCRA) protocol for single transceiver based Cognitive Radio Networks (CRNs) which combines adaptive modulation and coding with dynamic spectrum access. Simulation results demonstrate that CPCRA can achieve better performance in terms of lower delay and higher throughput.

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Two port frequency reconfigurable antenna for cognitive radios

Cited by 84 publications

References 1 publication

Dual Port Antenna Combining Sensing and Communication Tasks for Cognitive Radio

Dual Port Antenna Combining Sensing and Communication Tasks for Cognitive Radio

Ultra-Wideband Slotted Disc Antenna Compatible With Cognitive Radio Applications

Supporting Differentiated Service in Cognitive Radio Wireless Mesh Networks

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