Design and simulation of reconfigurable antenna for cognitive radio b. The antenna structures consist of a ultra wide band uwb sensing antenna, and a frequency reconfigurable communicating antenna both incorporated into the same substrate. 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. Reconfigurable double cslot microstrip patch antenna fed by 50 microstrip line is proposed in. The proposed antenna is most suitable for cognitive radio. In the concurrent triband mode frequency tuning is done.
Nowadays, cognitive radio cr is considered as the promising solution to enhance spectrum utilization 2. Cognitive radio system fundamentals and antenna requirements for its smooth operations are also discussed. It consists of two structures incorporated together into the same substrate. Reconfigurable wideband patch antenna for cognitive radio. In our design, a new antenna structure for cognitive radio is presented. A new reconfigurable antenna design for cognitive radio. Reconfigurable multi band notches antenna for cognitive radio. The proposed antenna senses the spectrum by uwb antenna from 2 to 11 ghz to identify the spectrum conditions.
Since the uwb antenna is cpw fed monopole it would be considered as a defected ground plane for the narrowband antenna. Pdf reconfigurable wideband patch antenna for cognitive radio. Reconfigurable circular ring patch antenna for uwb and cognitive radio applications. Reconfigurable wideband circularly polarized stacked square. 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. The cr system is integrated with two types of antennas. Reconfigurable wideband patch antenna for cognitive radio core. These antenna systems integrate a wideband, used for sensing, with a frequency reconfigurable antenna use to communicate 4. This paper presents a versatile reconfigurable antenna capable of spectrum sensing along with various reconfiguration features. Lim, reconfigurable rfics and modules for cognitive radio, 2006 topical.
Reconfigurable monopole antenna with defected ground. By rotating the antenna patch by 180, a different structure is being fed by the microstrip line. 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. Spectrum access and management for cognitive radio networks, 233264. Santasri koley is a project fellow in the department of electronics engineering, ism, dhanbad, india. The frequency reconfiguration of the communicating antenna can be.
S3 1,2assistant professor 1,2,3department of electronics and communication 1,2r. 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 antenna demonstrated a wideband performance at 28 ghz, tunable narrowband rejection between 5. Currently, he is doing research on frequencyreconfigurable patch antennas for cognitive radio applications.
The second antenna is a frequency reconfigurable rotational patches printed on the circular substrate. After recognizing the spectrum condition, the proposed antenna can reconfigure its polarization state, bandwidth and radiation pattern. The tested results in wideband mode shows that the proposed antenna operates from 3. Reconfigurable double cslot microstrip patch antenna fed by 50. The sensing antenna scans the channel to discover frequency bands while the reconfigurable section is tuning to communicate within these bands. Pdf a wide spectrum sensing and frequency reconfigurable. An integrated frequency reconfigurable antenna for. The antenna consists of two symmetric slots that are fed by a forkshaped microstrip line. Design of frequency and patternreconfigurable wideband. A reconfigurable multiband antenna for rfid and gps. Pier c online a wide spectrum sensing and frequency. A novel optically controlled reconfigurable antenna for.
Therefore, in configurationii a very thin slit is etched in the uwb antenna, which separates the region. Polarization reconfigurable ultrawideband antenna for cognitive radio applications polarization reconfigurable ultrawideband antenna for cognitive radio applications aboufoul, tamer. The module can be modified to transmit at more frequencies in the range 2. 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. The normalized radiation pattern of sensing antenna. The second structure is a frequency reconfigurable triangularshaped patch for establishing communication with another. A new uwb triband antenna for cognitive radio sciencedirect.
Reconfigurable wideband circularly polarized stacked. 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 frequency tuning is performed by switching on and off two patches. The second structure is a frequency reconfigurable triangularshaped patch for. In this paper, a reconfigurable multi band notches antenna, for cognitive radio applications, is proposed. A key enabler for realization of a cognitive communication system is the capability of. 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. In spectrum overlay cr, secondary users search for unused.
This study presents new antenna schemes suitable for cognitive radio communications. Introduction the antenna requirements for future cognitive radio cr communication systems are still not clear, but it is most likely that an. The antenna can operate in dualband or in very wide band mode in 5, 6 and 7 ghz. Polarization reconfigurable ultrawideband antenna for. A survey on uwb and reconfigurable antennas for cognitive. This rotation will produce different resonances, making the. An integrated frequency reconfigurable antenna for cognitive.
The frequency agility is achieved via a rotational motion of the patch antennas. For cognitive radio application, both, a wideband antenna for channel sensing and a reconfigurable antenna for communication are. The antenna structure consists of a sensing antenna and a frequency reconfigurable antenna system. 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. In proceedings of the 8th european conference on antennas and propagation eucap 2014 pp. Frequency reconfiguration is achieved by electronic switching. Ultrawideband patch antenna, spectrum sensing algorithm and reconfigurable patch antenna are also discussed. Reconfigurable multi band notches antenna for cognitive.
This results in more complicated couplings between the wideband and narrowband antenna. This paper proposes a frequency reconfigurable antenna system designed for cognitive radio applications. Reconfigurable wideband patch antenna for cognitive radio ieee. Pdf uwb sensing antenna, reconfigurable transceiver and. The antenna can operate in dualband or in very wide band mode in 5, 6 and 7 ghz bands. 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. Pdf reconfigurable wideband patch antenna for cognitive. In this paper, a survey on ultrawide band and reconfigurable antennas for cognitive radio application is presented. Nagar, chennai 3philips innovation campus manyata tech park, bangalore. 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.
Reconfigurable circular ring patch antenna for uwb and cognitive radio applications abstract. Reconfigurable wideband patch antenna for cognitive radio h. 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. A hybrid reconfigurable antenna design for cognitive radio. The first antenna is an ultra wideband uwb antenna covering the spectrum from 3. In 2, a combination of wideband and narrowband antennas into the same volume is presented. A novel hybrid antenna capable of both spectrum sensing and frequency reconfigurability is proposed in this paper. A printed reconfigurable ultrawideband uwb monopole antenna with triple narrow bandnotched characteristics is proposed for cognitive radio applications in this paper. A versatile reconfigurable antenna with integrated sensing. Uwb antenna with reconfigurable triple band notched characteristics for cognitive radio 1554 characteristics at wimax 3.
Moreover, in authors used a compact reconfigurable ultra wide band uwb patch antenna to efficiently allocate the secondary users to unoccupied spectrum bands. Compact size rectangular patch reconfigurable antenna for cognitive radio applications 26 as shown in the fig. A wide spectrum sensing and frequency reconfigurable antenna. A reconfigurable antenna consists of five different patches and there frequencies cover from 2. An integrated reconfigurable antenna capable of spectrum sensing along with various reconfiguration features such as polarization, frequency, bandwidth, and radiation pattern is proposed here. Design of reconfigurable band notches antenna for cognitive. Thus, in cognitive radio system, we need the capability to sense the spectrum sensing antenna, and communicate reconfigurable communicating antenna. Some research has been done related to the design of antennas for cognitive radio systems. Nevertheless, some frequency bands in the spectrum, especially above 3 ghz, are partially unoccupied at most time 1. Reconfigurable antenna, fractal antenna, hfss, cognitive radio i. Gayatri professor, mepco schlenk engineering college, post graduate student, mepco schlenk engineering college, abstract cognitive radio is an emerging technology for. A wideband slot antenna with frequency and patternreconfigurable characteristics for tdlte 3. In this paper, the design of wideband circularly polarized cp patch antennas for frequency reconfiguration in the physical layer of cognitive radios are. A compact cognitive radio uwbreconfigurable antenna.
Frequency reconfigurable patch antenna with bias tee for. State of the art techniques for cognitive radio antenna design. A versatile reconfigurable antenna for cognitive radio. Wideband to concurrent triband frequency reconfigurable. Reconfigurable frontend antennas for cognitive radio. The first one is based on a rotational motion of the. A key enabler for realization of a cognitive communication system is the capability of reconfigurability in the underlying hardware and the associated protocol suite. Results for three anten nas, suitable for small and mediumsized terminals, are given. In 5, the splitring resonators 6 are employed in the. 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.
Aug 14, 2017 reconfigurable circular ring patch antenna for uwb and cognitive radio applications. Two pin diodes are loaded in the slots to produce two different frequency bands. Introduction the increasing demand for higher data rate and connectivity has led to dynamic spectrum access as the. Christodoulou, member, ieee abstractthis letter presents a new antenna design suitable for cognitive radio communication. Volume 4, issue 9, march 2015 spectrum sensing in cognitive.
In 27 authors proposed frequency reconfigurable antenna through an elliptical disk monopole antenna with seven switchable states, including an ultrawideband uwb and narrowband states. Uwb and reconfigurable antennas for cognitive radio. Budimir 2 1wireless network and communication centre wncc, school of engineering and design, brunel university, west london, ub8 3ph, uk. The authors in 4 discuss some of the possible antenna requirements for cognitive radio applications and outline some design approaches. The wideband response for spectrum sensing is obtained by exciting semicircular arc having staircaseshaped slot in the ground plane. Reconfigurable microstrip antennas for cognitive radio.
Bandreconfigurable monopole antenna for cognitive radio. This letter presents a new antenna design suitable for cognitive radio communication. In the concurrent triband mode frequency tuning is done by microstrip open stub at 1. Reconfigurable wideband patch antenna for cognitive radio 2009.
A frequency reconfigurable printed microstripfed patch antenna is proposed here. Towards software defined antenna for cognitive radio networks. A wide spectrum sensing and frequency reconfigurable antenna for cognitive radio by s. Then, switches are incorporated into the filtering uwb antennas to. May 17, 2014 the antenna structure consists of a sensing antenna and a frequency reconfigurable antenna system. The proposed antenna senses the spectrum by semicircular structure from 3 ghz to 10 ghz to identify the spectrum conditions. A frequency reconfigurable rotatable antenna design for cognitive radio systems g. The first structure is an ultrawideband uwb antenna covering the spectrum from 3. 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.
Reconfigurable multiband antenna demonstrated in some papers can be switched from single narrowband to another single narrowband 4, between dual band to another. A reconfigurable triplenotchband antenna integrated with. Uwb frequency reconfigurable patch antenna for cognitive radio. 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. This antenna has been highlighted in iet electronics letter as the first multifunction antenna to combine wideband, notch and narrowband modes. The reconfigurable communicating antenna structure is summarized in fig. Frequency reconfigurable microstrip antenna for cognitive. A frequency reconfigurable rotatable antenna design for. In this paper two ultra wide band frequency reconfigurable microstrip patch antennas for cognitive radio applications were designed. The performance of the antennas designed by various techniques in terms of, the radiation. Two different techniques to achieve the required frequency agility are proposed. Ultrawideband uwb technology is very suitable as the enabling technology for this approach. Design and simulation of reconfigurable antenna for. 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 new reconfigurable antenna design for cognitive radio, ieee, may, 2009. Design and simulation of reconfigurable antenna for cognitive. 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. A survey on planar antenna designs for cognitive radio. Recently, the frequency range of 200 mhz to 5 ghz has attained the attention of many researchers for use with reconfigurable antenna. Fractal reconfigurable multiband communicating antenna for. Uwb and reconfigurable antennas for cognitive radio application using mems technology ms. A hybrid reconfigurable antenna design for cognitive radio system 329. Reconfigurable double cslot microstrip patch antenna fed by 50 ohm microstrip line is proposed in this paper. The antenna can operate in dualband or in very wide band mode in 5, 6 and 7\ud ghz bands. Cognitive radio is an intelligent wireless communication system that is aware of its surrounding environment i.
A printed reconfigurable ultra wideband uwb monopole antenna with triple narrow bandnotched characteristics is proposed for cognitive radio applications in this paper. This article mainly focuses on the concept of cognitive radio paradigm in the ultrawideband 3. Towards software defined antenna for cognitive radio. Reconfigurable antennas for uwb cognitive radio communication. Index terms cognitive radio, frequencyreconfigurable antenna,pin diode switches, widebandtosubbands reconfiguration, defected microstrip structure. The shape of antenna is highly designed to cover the wide band and provide. Reconfigurable antennas synthesis lectures on antennas. The octagonal loop antenna with rectangular patch is the sensing antenna which.