In this paper, a survey on ultrawide band and reconfigurable antennas for cognitive radio application is presented. May 17, 2014 the antenna structure consists of a sensing antenna and a frequency reconfigurable antenna system. Nevertheless, some frequency bands in the spectrum, especially above 3 ghz, are partially unoccupied at most time 1. In this paper, the design of wideband circularly polarized cp patch antennas for frequency reconfiguration in the physical layer of cognitive radios are. Tripathi, an integrated frequency reconfigurable antenna for cognitive radio in uwb monopole without much affecting the s11 response, than this space can be reused to integrate another nb antenna. The antenna can operate in dualband or in very wide band mode in 5, 6 and 7 ghz bands. Reconfigurable wideband patch antenna for cognitive radio 2009.
Wideband to concurrent triband frequency reconfigurable. Cognitive radio system based on software defined architecture aims to improve the spectrum utilization by changing the transmitter parameters based on the interaction with the environment in which it operates 8. Nagar, chennai 3philips innovation campus manyata tech park, bangalore. Towards software defined antenna for cognitive radio networks.
Reconfigurable multi band notches antenna for cognitive. The reconfigurable communicating antenna structure is summarized in fig. In 5, the splitring resonators 6 are employed in the. This letter presents a new antenna design suitable for cognitive radio communication.
Pdf uwb sensing antenna, reconfigurable transceiver and. A frequency reconfigurable rotatable antenna design for. A versatile reconfigurable antenna with integrated sensing. Then, switches are incorporated into the filtering uwb antennas to. A new uwb triband antenna for cognitive radio sciencedirect. Gayatri professor, mepco schlenk engineering college, post graduate student, mepco schlenk engineering college, abstract cognitive radio is an emerging technology for. Gayatri professor, mepco schlenk engineering college, post graduate student, mepco schlenk engineering college, abstract cognitive radio is an emerging technology for efficient use of radio spectrum where the spectrum can. The performance of the antennas designed by various techniques in terms of, the radiation.
Dec 01, 2015 the switch was proposed in 3 for the reconfigurable multiband antenna to switch on and off two patches antenna two operates antenna in two different dual band mode or wideband mode. Towards software defined antenna for cognitive radio. Fractal reconfigurable multiband communicating antenna for. Uwb antenna with reconfigurable triple band notched characteristics for cognitive radio 1554 characteristics at wimax 3. An integrated frequency reconfigurable antenna for cognitive. A compact cognitive radio uwbreconfigurable antenna. Cognitive radio communication is envisaged to be a new paradigm of methodologies for enhancing the performance of radio communication systems through the efficient utilization of radio.
In spectrum overlay cr, secondary users search for unused. A wideband slot antenna with frequency and patternreconfigurable characteristics for tdlte 3. Design of frequency and patternreconfigurable wideband. Reconfigurable antenna, fractal antenna, hfss, cognitive radio i. Ultrawideband patch antenna, spectrum sensing algorithm and reconfigurable patch antenna are also discussed. The wideband response for spectrum sensing is obtained by exciting semicircular arc having staircaseshaped slot in the ground plane. In proceedings of the 8th european conference on antennas and propagation eucap 2014 pp. Ultrawideband uwb technology is very suitable as the enabling technology for this approach. The normalized radiation pattern of sensing antenna. By rotating the antenna patch by 180, a different structure is being fed by the microstrip line. Introduction the increasing demand for higher data rate and connectivity has led to dynamic spectrum access as the. The antenna demonstrated a wideband performance at 28 ghz, tunable narrowband rejection between 5.
The second structure is a frequency reconfigurable triangularshaped patch for. Uwb frequency reconfigurable patch antenna for cognitive radio. A frequency reconfigurable rotatable antenna design for cognitive radio systems g. A survey on uwb and reconfigurable antennas for cognitive. An integrated frequency reconfigurable antenna for. This antenna has been highlighted in iet electronics letter as the first multifunction antenna to combine wideband, notch and narrowband modes. A reconfigurable multiband antenna for rfid and gps. The octagonal loop antenna with rectangular patch is the sensing antenna which. The first antenna is an ultra wideband uwb antenna covering the spectrum from 3. The antenna structures consist of a ultra wide band uwb sensing antenna, and a frequency reconfigurable communicating antenna both incorporated into the same substrate. A versatile reconfigurable antenna for cognitive radio. Reconfigurable circular ring patch antenna for uwb and cognitive radio applications. For cognitive radio application, both, a wideband antenna for channel sensing and a reconfigurable antenna for communication are. Spectrum access and management for cognitive radio networks, 233264.
The antenna consists of two symmetric slots that are fed by a forkshaped microstrip line. A wide spectrum sensing and frequency reconfigurable antenna for cognitive radio by s. A printed reconfigurable ultra wideband uwb monopole antenna with triple narrow bandnotched characteristics is proposed for cognitive radio applications in this paper. Lim, reconfigurable rfics and modules for cognitive radio, 2006 topical. Compact size rectangular patch reconfigurable antenna for cognitive radio applications 26 as shown in the fig. Design and simulation of reconfigurable antenna for cognitive. The sensing antenna scans the channel to discover frequency bands while the reconfigurable section is tuning to communicate within these bands. In 27 authors proposed frequency reconfigurable antenna through an elliptical disk monopole antenna with seven switchable states, including an ultrawideband uwb and narrowband states. Reconfigurable frontend antennas for cognitive radio. Pdf reconfigurable wideband patch antenna for cognitive radio. A novel optically controlled reconfigurable antenna for.
The antenna can be operated as ultra wideband, and is reconfigurable in terms of the ability to select one or two notches band in the srr resonant frequency. In the concurrent triband mode frequency tuning is done by microstrip open stub at 1. In this paper two ultra wide band frequency reconfigurable microstrip patch antennas for cognitive radio applications were designed. In order to provide a dynamic response, reconfigurable antennas integrate an inner mechanism such as rf switches, varactors, mechanical actuators or tunable materials that enable the intentional redistribution of the rf currents over the. Reconfigurable wideband patch antenna for cognitive radio core. Design and simulation of reconfigurable antenna for. In our design, a new antenna structure for cognitive radio is presented. Aug 14, 2017 reconfigurable circular ring patch antenna for uwb and cognitive radio applications. A reconfigurable triplenotchband antenna integrated with. Cognitive radio communication is envisaged to be a new paradigm of methodologies for enhancing the performance of radio communication systems through the efficient utilization of radio spectrum. The switch was proposed in 3 for the reconfigurable multiband antenna to switch on and off two patches antenna two operates antenna in two different dual band mode or wideband mode. It consists of two structures incorporated together into the same substrate. Therefore, in configurationii a very thin slit is etched in the uwb antenna, which separates the region.
A key enabler for realization of a cognitive communication system is the capability of. Reconfigurable antennas synthesis lectures on antennas. A hybrid reconfigurable antenna design for cognitive radio system 329. The proposed antenna is most suitable for cognitive radio. Reconfigurable multi band notches antenna for cognitive radio.
Frequency reconfiguration is achieved by electronic switching. The shape of antenna is highly designed to cover the wide band and provide. The proposed antenna senses the spectrum by semicircular structure from 3 ghz to 10 ghz to identify the spectrum conditions. Santasri koley is a project fellow in the department of electronics engineering, ism, dhanbad, india. This paper proposes a frequency reconfigurable antenna system designed for cognitive radio applications. Cognitive radio is an intelligent wireless communication system that is aware of its surrounding environment i. Pier c online a wide spectrum sensing and frequency. This paper presents a versatile reconfigurable antenna capable of spectrum sensing along with various reconfiguration features.
Currently, he is doing research on frequencyreconfigurable patch antennas for cognitive radio applications. Recently, the frequency range of 200 mhz to 5 ghz has attained the attention of many researchers for use with reconfigurable antenna. In this letter, a survey of different recent state of the art techniques that have been deployed in the design of antennas that can perform excellently for cognitive radio application is carried out. In this paper, a reconfigurable multi band notches antenna, for cognitive radio applications, is proposed. Pdf reconfigurable wideband patch antenna for cognitive. Reconfigurable multiband antenna demonstrated in some papers can be switched from single narrowband to another single narrowband 4, between dual band to another. An integrated reconfigurable antenna capable of spectrum sensing along with various reconfiguration features such as polarization, frequency, bandwidth, and radiation pattern is proposed here. Moreover, in authors used a compact reconfigurable ultra wide band uwb patch antenna to efficiently allocate the secondary users to unoccupied spectrum bands. This article mainly focuses on the concept of cognitive radio paradigm in the ultrawideband 3. The main goal of cognitive radio system is to determine the spectrum holes using an ultra wide band sensing antenna and to transmit using a narrow band frequency reconfigurable antenna in the. The antenna structure consists of a sensing antenna and a frequency reconfigurable antenna system.
Pdf a wide spectrum sensing and frequency reconfigurable. Index terms cognitive radio, frequencyreconfigurable antenna,pin diode switches, widebandtosubbands reconfiguration, defected microstrip structure. A new reconfigurable antenna design for cognitive radio, ieee, may, 2009. Volume 4, issue 9, march 2015 spectrum sensing in cognitive. State of the art techniques for cognitive radio antenna design. The first structure is an ultrawideband uwb antenna covering the spectrum from 3. A reconfigurable antenna is an antenna capable of modifying its frequency and radiation properties dynamically, in a controlled and reversible manner. Reconfigurable circular ring patch antenna for uwb and cognitive radio applications abstract. Bandreconfigurable monopole antenna for cognitive radio. Polarization reconfigurable ultrawideband antenna for cognitive radio applications polarization reconfigurable ultrawideband antenna for cognitive radio applications aboufoul, tamer. The antenna can operate in dualband or in very wide band mode in 5, 6 and 7 ghz.
Design of reconfigurable band notches antenna for cognitive. Reconfigurable microstrip antennas for cognitive radio. The antenna can operate in dualband or in very wide band mode in 5, 6 and 7\ud ghz bands. Two pin diodes are loaded in the slots to produce two different frequency bands. Frequency reconfigurable microstrip antenna for cognitive.
The first one is based on a rotational motion of the. Wideband antennas are required conventional microstrip patch antennas are narrowband hence, antenna reconfiguration is desirable 4 frequencyagile frontend spectrum sensing phy mac wideband antenna j. A frequency reconfigurable printed microstripfed patch antenna is proposed here. A key enabler for realization of a cognitive communication system is the capability of reconfigurability in the underlying hardware and the associated protocol suite. A survey on planar antenna designs for cognitive radio. Reconfigurable antennas for uwb cognitive radio communication. The second structure is a frequency reconfigurable triangularshaped patch for establishing communication with another.
Frequency reconfigurable patch antenna with bias tee for. This results in more complicated couplings between the wideband and narrowband antenna. The authors in 4 discuss some of the possible antenna requirements for cognitive radio applications and outline some design approaches. Uwb and reconfigurable antennas for cognitive radio. Reconfigurable circular ring patch antenna for uwb and. Results for three anten nas, suitable for small and mediumsized terminals, are given.
The frequency agility is achieved via a rotational motion of the patch antennas. Uwb and reconfigurable antennas for cognitive radio application using mems technology ms. Christodoulou, member, ieee abstractthis letter presents a new antenna design suitable for cognitive radio communication. Reconfigurable double cslot microstrip patch antenna fed by 50 ohm microstrip line is proposed in this paper. Some research has been done related to the design of antennas for cognitive radio systems. A printed reconfigurable ultrawideband uwb monopole antenna with triple narrow bandnotched characteristics is proposed for cognitive radio applications in this paper. In the concurrent triband mode frequency tuning is done. A reconfigurable antenna consists of five different patches and there frequencies cover from 2. Reconfigurable wideband patch antenna for cognitive radio. Reconfigurable wideband circularly polarized stacked square. The frequency tuning is performed by switching on and off two patches. The cr system is integrated with two types of antennas.
Reconfigurable wideband circularly polarized stacked. The second antenna is a frequency reconfigurable rotational patches printed on the circular substrate. The antenna consists of a microstrip feed connected to a circular radiating element divided into three patches which are connected through silicon pin diodes used as switches for achieving reconfigurability as being cheap and easy to implement having high switching capabilities. Reconfigurable wideband patch antenna for cognitive radio ieee. A hybrid reconfigurable antenna design for cognitive radio.
Introduction the antenna requirements for future cognitive radio cr communication systems are still not clear, but it is most likely that an. S3 1,2assistant professor 1,2,3department of electronics and communication 1,2r. Polarization reconfigurable ultrawideband antenna for. The module can be modified to transmit at more frequencies in the range 2. Reconfigurable double cslot microstrip patch antenna fed by 50. These antenna systems integrate a wideband, used for sensing, with a frequency reconfigurable antenna use to communicate 4. Two different techniques to achieve the required frequency agility are proposed. The proposed antenna senses the spectrum by uwb antenna from 2 to 11 ghz to identify the spectrum conditions. In 2, a combination of wideband and narrowband antennas into the same volume is presented.
Nowadays, cognitive radio cr is considered as the promising solution to enhance spectrum utilization 2. Design and simulation of reconfigurable antenna for cognitive radio b. Reconfigurable double cslot microstrip patch antenna fed by 50 microstrip line is proposed in. The tested results in wideband mode shows that the proposed antenna operates from 3. A new reconfigurable antenna design for cognitive radio.
Cognitive radio system fundamentals and antenna requirements for its smooth operations are also discussed. After recognizing the spectrum condition, the proposed antenna can reconfigure its polarization state, bandwidth and radiation pattern. The frequency reconfiguration of the communicating antenna can be. In this work, a new ultra wide band circular ring patch antenna is proposed for spectral sensing application as well as the transmission and reception of radiofrequency in cognitive radio systems. This rotation will produce different resonances, making the. This study presents new antenna schemes suitable for cognitive radio communications.
A novel hybrid antenna capable of both spectrum sensing and frequency reconfigurability is proposed in this paper. Thus, in cognitive radio system, we need the capability to sense the spectrum sensing antenna, and communicate reconfigurable communicating antenna. Reconfigurable wideband patch antenna for cognitive radio h. A wide spectrum sensing and frequency reconfigurable antenna. Reconfigurable monopole antenna with defected ground. Since the uwb antenna is cpw fed monopole it would be considered as a defected ground plane for the narrowband antenna.
477 4 1179 1038 850 192 131 1391 992 135 862 671 225 1510 986 250 1150 1025 337 178 432 114 549 558 1270 1248 1481 891 306 734 227 349 1347 542 678 739 653 127 199 1396 1335 160 110 817 1067 506