Reconfigurable wideband patch antenna for cognitive radio 2009. Polarization reconfigurable ultrawideband antenna for cognitive radio applications polarization reconfigurable ultrawideband antenna for cognitive radio applications aboufoul, tamer. Two pin diodes are loaded in the slots to produce two different frequency bands. 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. Moreover, in authors used a compact reconfigurable ultra wide band uwb patch antenna to efficiently allocate the secondary users to unoccupied spectrum bands. The cr system is integrated with two types of antennas. A frequency reconfigurable rotatable antenna design for cognitive radio systems g.
Towards software defined antenna for cognitive radio networks. 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. A key enabler for realization of a cognitive communication system is the capability of reconfigurability in the underlying hardware and the associated protocol suite. The antenna consists of two symmetric slots that are fed by a forkshaped microstrip line. Reconfigurable circular ring patch antenna for uwb and cognitive radio applications abstract. In the concurrent triband mode frequency tuning is done.
Then, switches are incorporated into the filtering uwb antennas to. Pdf reconfigurable wideband patch antenna for cognitive radio. Uwb and reconfigurable antennas for cognitive radio. The second structure is a frequency reconfigurable triangularshaped patch for. This results in more complicated couplings between the wideband and narrowband antenna. A new reconfigurable antenna design for cognitive radio. A printed reconfigurable ultra wideband uwb monopole antenna with triple narrow bandnotched characteristics is proposed for cognitive radio applications in this paper. Reconfigurable monopole antenna with defected ground.
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. Cognitive radio system fundamentals and antenna requirements for its smooth operations are also discussed. The shape of antenna is highly designed to cover the wide band and provide. In spectrum overlay cr, secondary users search for unused. Frequency reconfigurable patch antenna with bias tee for. Reconfigurable double cslot microstrip patch antenna fed by 50 microstrip line is proposed in. In this paper two ultra wide band frequency reconfigurable microstrip patch antennas for cognitive radio applications were designed. Since the uwb antenna is cpw fed monopole it would be considered as a defected ground plane for the narrowband antenna. 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.
In this paper, the design of wideband circularly polarized cp patch antennas for frequency reconfiguration in the physical layer of cognitive radios are. By rotating the antenna patch by 180, a different structure is being fed by the microstrip line. Reconfigurable antennas synthesis lectures on antennas. 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. Aug 14, 2017 reconfigurable circular ring patch antenna for uwb and cognitive radio applications. The second structure is a frequency reconfigurable triangularshaped patch for establishing communication with another. A hybrid reconfigurable antenna design for cognitive radio system 329. S3 1,2assistant professor 1,2,3department of electronics and communication 1,2r. Reconfigurable multi band notches antenna for cognitive. A wideband slot antenna with frequency and patternreconfigurable characteristics for tdlte 3.
Uwb antenna with reconfigurable triple band notched characteristics for cognitive radio 1554 characteristics at wimax 3. After recognizing the spectrum condition, the proposed antenna can reconfigure its polarization state, bandwidth and radiation pattern. Reconfigurable double cslot microstrip patch antenna fed by 50 ohm microstrip line is proposed in this paper. Wideband to concurrent triband frequency reconfigurable. 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 wideband circularly polarized stacked square. The proposed antenna senses the spectrum by semicircular structure from 3 ghz to 10 ghz to identify the spectrum conditions. Introduction the antenna requirements for future cognitive radio cr communication systems are still not clear, but it is most likely that an. In this paper, a survey on ultrawide band and reconfigurable antennas for cognitive radio application is presented. Index terms cognitive radio, frequencyreconfigurable antenna,pin diode switches, widebandtosubbands reconfiguration, defected microstrip structure.
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. This paper proposes a frequency reconfigurable antenna system designed for cognitive radio applications. A wide spectrum sensing and frequency reconfigurable antenna for cognitive radio by s. A hybrid reconfigurable antenna design for cognitive radio. Ultrawideband uwb technology is very suitable as the enabling technology for this approach. Spectrum access and management for cognitive radio networks, 233264.
Reconfigurable antenna, fractal antenna, hfss, cognitive radio i. The antenna structures consist of a ultra wide band uwb sensing antenna, and a frequency reconfigurable communicating antenna both incorporated into the same substrate. Uwb frequency reconfigurable patch antenna for cognitive radio. A printed reconfigurable ultrawideband uwb monopole antenna with triple narrow bandnotched characteristics is proposed for cognitive radio applications in this paper. The octagonal loop antenna with rectangular patch is the sensing antenna which. The proposed antenna senses the spectrum by uwb antenna from 2 to 11 ghz to identify the spectrum conditions. A new reconfigurable antenna design for cognitive radio, ieee, may, 2009. Nowadays, cognitive radio cr is considered as the promising solution to enhance spectrum utilization 2. Christodoulou, member, ieee abstractthis letter presents a new antenna design suitable for cognitive radio communication. A novel optically controlled reconfigurable antenna for.
In proceedings of the 8th european conference on antennas and propagation eucap 2014 pp. Reconfigurable multi band notches antenna for cognitive radio. The reconfigurable communicating antenna structure is summarized in fig. Some research has been done related to the design of antennas for cognitive radio systems. This paper presents a versatile reconfigurable antenna capable of spectrum sensing along with various reconfiguration features. Pdf a wide spectrum sensing and frequency reconfigurable. Two different techniques to achieve the required frequency agility are proposed. The second antenna is a frequency reconfigurable rotational patches printed on the circular substrate.
A survey on uwb and reconfigurable antennas for cognitive. Compact size rectangular patch reconfigurable antenna for cognitive radio applications 26 as shown in the fig. May 17, 2014 the antenna structure consists of a sensing antenna and a frequency reconfigurable antenna system. The authors in 4 discuss some of the possible antenna requirements for cognitive radio applications and outline some design approaches. The performance of the antennas designed by various techniques in terms of, the radiation. Currently, he is doing research on frequencyreconfigurable patch antennas for cognitive radio applications. The first one is based on a rotational motion of the. Design and simulation of reconfigurable antenna for cognitive radio b. Reconfigurable circular ring patch antenna for uwb and. A versatile reconfigurable antenna for cognitive radio. Introduction recent times, the explosive growth rate of subscriber base for the modern wireless communication throws an important challenge on the spectrum management which is valuable and limited natural resource. Cognitive radio is an intelligent wireless communication system that is aware of its surrounding environment i.
A reconfigurable multiband antenna for rfid and gps. Reconfigurable wideband patch antenna for cognitive radio core. In the concurrent triband mode frequency tuning is done by microstrip open stub at 1. The first structure is an ultrawideband uwb antenna covering the spectrum from 3. Design of frequency and patternreconfigurable wideband. Reconfigurable double cslot microstrip patch antenna fed by 50. Reconfigurable microstrip antennas for cognitive radio. For cognitive radio application, both, a wideband antenna for channel sensing and a reconfigurable antenna for communication are. Reconfigurable multiband antenna demonstrated in some papers can be switched from single narrowband to another single narrowband 4, between dual band to another. 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.
Lim, reconfigurable rfics and modules for cognitive radio, 2006 topical. An integrated frequency reconfigurable antenna for. 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. Bandreconfigurable monopole antenna for cognitive radio. 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. A key enabler for realization of a cognitive communication system is the capability of. Design of reconfigurable band notches antenna for cognitive. Therefore, in configurationii a very thin slit is etched in the uwb antenna, which separates the region. The antenna can operate in dualband or in very wide band mode in 5, 6 and 7\ud ghz bands. The antenna structure consists of a sensing antenna and a frequency reconfigurable antenna system. 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. A survey on planar antenna designs for cognitive radio. The frequency reconfiguration of the communicating antenna can be. A compact cognitive radio uwbreconfigurable antenna.
This letter presents a new antenna design suitable for cognitive radio communication. 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. A frequency reconfigurable rotatable antenna design for. Reconfigurable antennas for uwb cognitive radio communication. Fractal reconfigurable multiband communicating antenna for. Frequency reconfiguration is achieved by electronic switching. 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. 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. This article mainly focuses on the concept of cognitive radio paradigm in the ultrawideband 3.
The sensing antenna scans the channel to discover frequency bands while the reconfigurable section is tuning to communicate within these bands. An integrated frequency reconfigurable antenna for cognitive. Budimir 2 1wireless network and communication centre wncc, school of engineering and design, brunel university, west london, ub8 3ph, uk. Design and simulation of reconfigurable antenna for. The frequency agility is achieved via a rotational motion of the patch antennas. Polarization reconfigurable ultrawideband antenna for. In 2, a combination of wideband and narrowband antennas into the same volume is presented. A new uwb triband antenna for cognitive radio sciencedirect. Frequency reconfigurable microstrip antenna for cognitive. The frequency tuning is performed by switching on and off two patches. A wide spectrum sensing and frequency reconfigurable antenna. A reconfigurable antenna is an antenna capable of modifying its frequency and radiation properties dynamically, in a controlled and reversible manner. Reconfigurable wideband patch antenna for cognitive radio. An integrated reconfigurable antenna capable of spectrum sensing along with various reconfiguration features such as polarization, frequency, bandwidth, and radiation pattern is proposed here.
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. Pdf reconfigurable wideband patch antenna for cognitive. Recently, the frequency range of 200 mhz to 5 ghz has attained the attention of many researchers for use with reconfigurable antenna. Design and simulation of reconfigurable antenna for cognitive. Uwb and reconfigurable antennas for cognitive radio application using mems technology ms. Pdf uwb sensing antenna, reconfigurable transceiver and.
In our design, a new antenna structure for cognitive radio is presented. Ultrawideband patch antenna, spectrum sensing algorithm and reconfigurable patch antenna are also discussed. Reconfigurable wideband patch antenna for cognitive radio ieee. This antenna has been highlighted in iet electronics letter as the first multifunction antenna to combine wideband, notch and narrowband modes. In 5, the splitring resonators 6 are employed in the.
The proposed antenna is most suitable for cognitive radio. State of the art techniques for cognitive radio antenna design. The antenna can operate in dualband or in very wide band mode in 5, 6 and 7 ghz. A reconfigurable triplenotchband antenna integrated with. Nagar, chennai 3philips innovation campus manyata tech park, bangalore. A reconfigurable antenna consists of five different patches and there frequencies cover from 2.
Santasri koley is a project fellow in the department of electronics engineering, ism, dhanbad, india. A novel hybrid antenna capable of both spectrum sensing and frequency reconfigurability is proposed in this paper. The module can be modified to transmit at more frequencies in the range 2. The wideband response for spectrum sensing is obtained by exciting semicircular arc having staircaseshaped slot in the ground plane. A versatile reconfigurable antenna with integrated sensing. Results for three anten nas, suitable for small and mediumsized terminals, are given.
The normalized radiation pattern of sensing antenna. Reconfigurable wideband circularly polarized stacked. The tested results in wideband mode shows that the proposed antenna operates from 3. Volume 4, issue 9, march 2015 spectrum sensing in cognitive.
Pier c online a wide spectrum sensing and frequency. Thus, in cognitive radio system, we need the capability to sense the spectrum sensing antenna, and communicate reconfigurable communicating antenna. The antenna demonstrated a wideband performance at 28 ghz, tunable narrowband rejection between 5. Reconfigurable frontend antennas for cognitive radio. Nevertheless, some frequency bands in the spectrum, especially above 3 ghz, are partially unoccupied at most time 1. These antenna systems integrate a wideband, used for sensing, with a frequency reconfigurable antenna use to communicate 4. This rotation will produce different resonances, making the. Reconfigurable wideband patch antenna for cognitive radio h. Gayatri professor, mepco schlenk engineering college, post graduate student, mepco schlenk engineering college, abstract cognitive radio is an emerging technology for. Reconfigurable circular ring patch antenna for uwb and cognitive radio applications.
678 603 154 816 1283 1553 1126 253 1019 326 184 1206 853 791 770 839 603 937 677 746 1294 95 520 1601 951 455 465 567 142 1552 1056 359 964 1207 1102 1159 1284 1407 901 803 903 1399 1372