The second antenna proposed is dual port microstrip patch for cognitive radio system. The design is suitable for cognitive radio applications where the uwb antenna is required for spectrum sensing and the narrow band antenna is used for. In this paper, the design of wideband circularly polarized cp patch antennas for frequency reconfiguration in the physical layer of cognitive radios are. This letter presents a new antenna design suitable for cognitive radio communication. A new reconfigurable antenna design for cognitive radio article in ieee antennas and wireless propagation letters 81. Frequency reconfigurable microstrip antenna for cognitive. Introduction conventional radio networks are designed to operate within a specified rf spectrum range. A survey of cognitive radio reconfigurable antenna design and. The proposed antenna is capable of switching between a wide operating band of 3. A low profile and compact size cognitive radio cr sensing communicating antenna system is presented in this paper. A printed reconfigurable ultra wideband uwb monopole antenna with triple narrow bandnotched characteristics is proposed for cognitive radio applications in this paper.
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 design as proposed herein, can operate at either of the frequency bands used in 5, 6 and 7 ghz with very wideband impedance bandwidth. Reconfigurable bandnotched uwb antenna for cognitive. Aeu international journal of electronics and communications 102, 2534. Cognitive radio networks, reconfigurable antenna, genetic algorithm. Budimir 2 1wireless network and communication centre wncc, school of engineering and design, brunel university, west london. Reconfigurability is achieved by inserting pin diode switches in dmsdefected microstrip structure t slot filter. Reconfigurable microstrip slot antenna with dgs for uwb.
To generate a wide usable fractional bandwidth of 3 to over. Therefore, in configurationii a very thin slit is etched in the uwb antenna, which separates the region. Then, switches are incorporated into the filtering uwb antennas to. In 3, a frequency reconfigurable antenna to cover either the 3. Design and simulation of reconfigurable antenna for cognitive. In the cognitive radio model, ultrawideband antennas are employed for free channels identification and reconfigurable narrow band antennas for communication. 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. The antenna is designed in such a way that it suits for cognitive radio networks. Normally, a bandwidth remains underutilized in cognitive radio network. The antenna for cr should be able to sense wide band spectrum and operate at various available frequencies, it is the combination of both wideband and frequency reconfigurable antennas 3, 4. Design of frequency and patternreconfigurable wideband slot.
In the proposed structure, an uwb antenna is also incorporated, making it suitable for cognitive radio communication. A wideband slot antenna with frequency and patternreconfigurable characteristics for tdlte 3. A survey on planar antenna designs for cognitive radio. An integrated frequency reconfigurable antenna for cognitive. Reconfigurable wideband circularly polarized stacked square. This antenna achieves an enhanced impedance bandwidth of 2. Many researchers have been concentrating on designing antennas for cognitive radio in recent. Design of reconfigurable band notches antenna for cognitive. Aug 14, 2017 reconfigurable circular ring patch antenna for uwb and cognitive radio applications. A reconfigurable antenna is an antenna capable of modifying its frequency and radiation properties dynamically, in a controlled and reversible manner.
A reconfigurable patch antenna structure is proposed and the. The design is suitable for cognitive radio applications where the uwb antenna is required for spectrum sensing and the narrow band antenna is used for reconfigurable operation, which can be tuned. Design of an antenna with reconfigurable band rejection for uwb cognitive radio. Reconfigurable antenna structure for a wideband cognitive.
In this paper, a frequency reconfigurable microstrip slot antenna for ultra wideband applications with switchable bandnotch functions is designed and manufactured. The antenna structures consist of a ultra wide band uwb sensing antenna, and a frequency reconfigurable communicating antenna both incorporated into the same substrate. Index termscslot, cognitive radio, patch antenna, reconfigurable antenna, slot antenna, small antenna, switched antenna, wideband antenna. A new reconfigurable antenna design for cognitive radio. The physical layer of the cognitive 2 radio antennas, conversion modules, etc. The proposed antenna framework exploits the edges of a compact antenna, such as a square microstrip patch, that are selectively connected to achieve a discrete reconfigurable frequency tuning within the range 0. In this paper the design of a single feed antenna that can be tuned to a frequency in the range 450 mhz to 2. Wideband and reconfigurable narrowband functionality may potentially be of advantageous in emerging wireless communication systems such as software defined radio and cognitive radio for wideband sensing and reconfigurable narrowband communication procedure. It consists of two structures incorporated together into the same substrate.
Reconfigurable double cslot microstrip patch antenna fed by 50. In this chapter, an ultrawideband uwb slotted eshaped microstrip patch antenna is designed, and simulation tests are carried out for the applications of cognitive radio and navigation system. Wideband, multiband, and smart reconfigurable antennas for modern wireless communications showcases current trends and novel approaches in the design and analysis of the antennas that make wireless applications possible, while also identifying unique integration opportunities for antennas and wireless applications to work together. In this paper, design methodology of reconfigurable microstrip patch antenna is presented with.
Design of an antenna with reconfigurable band rejection. Pdf reconfigurable wideband patch antenna for cognitive radio. Uwb sensing antenna, reconfigurable transceiver and. The first structure is an ultrawideband uwb antenna covering the spectrum from 3. Wireless networks and communications centrewncc, brunel university, uk 1 abstract a reconfigurable wideband and multiband cslot patch antenna with dualpatch elements is proposed and studied. In this paper, an electromagnetic metamaterial patch antenna is designed and simulated for cognitive radio applications, as cognitive radio communication is anticipated to be a new technology. A cognitive radio is an intelligent antenna that can be programmed and configured dynamically. In this paper, the design of wideband circularly polarized cp patch antennas for frequency reconfiguration in. The proposed microstripfeed antenna mainly consists of circular monopole antenna cma with defected ground structure for cognitive radio application is presented.
Reconfigurable circular ring patch antenna for uwb and cognitive radio applications abstract. The antenna has a partial ground plane with a rectangular slot to achieve the desired bandwidth for. Cognitive radio network crn is the latest paradigm of techniques for. Two different techniques to achieve the required frequency agility are proposed. Dec 28, 2017 in this chapter, an ultra wideband uwb slotted eshaped microstrip patch antenna is designed, and simulation tests are carried out for the applications of cognitive radio and navigation system.
Wideband and reconfigurable antennas for emerging wireless. Wideband, multiband, and smart reconfigurable antennas for. Reconfigurable wideband patch antenna for cognitive radio. 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 reconfigurable triplenotchband antenna integrated with.
Cognitive radio has acquired a great regard in wireless systems because of enormous spectrum improvement 1,2. The template comprises a square patch element fed by a coaxial cable and four surrounding elements that. Reconfigurable wideband patch antenna for cognitive radio h. In proceedings of the 8th european conference on antennas and propagation eucap 2014 pp. Reconfigurable monopole antenna with defected ground. The switching strategy for relaying among the resonant frequencies of the reconfigurable antenna is one of them. Coupling between the two patch elements plays a major role for achieving the wide bandwidth and the effects of mutual coupling between the patch elements are also studied. A slotted elliptical monopole antenna sema is proposed as an ultrawideband uwb sensing antenna for the cr system, while the cr communication relies on a triangular reconfigurable monopole antenna. The authors in 4 discuss some of the possible antenna requirements for cognitive radio applications and outline some design approaches.
Fractal reconfigurable multiband communicating antenna for. Christodoulou, member, ieee abstractthis letter presents a new antenna design suitable for cognitive radio communication. The frequency tuning is performed by switching on and off two patches. This design is used for overlay cognitive radio in which one antenna is for sensing and other for communication. Reconfigurable frontend antennas for cognitive radio. 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 simple, unspecified suwb antenna can be attached to a feeding network to form one integrated selective and reconfigurable antenna. Budimir 2 1 wireless network and communication centre wncc, school of engineering and design, brunel university, west london, ub8 3ph, uk. The proposed antenna uses fr4 substrate having thickness of 1.
Ultrawideband slotted microstrip patch antenna for. In 5, the splitring resonators 6 are employed in the. The antenna consists of two symmetric slots that are fed by a forkshaped microstrip line. 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. Uwb and reconfigurable antennas for cognitive radio. This study presents new antenna schemes suitable for cognitive radio communications. Towards software defined antenna for cognitive radio networks. A compact reconfigurable bandnotched uwb antenna is presented in this paper. Towards software defined antenna for cognitive radio networks through appropriate selection of rfswitch using reconfigurable antenna array author links open overlay panel ahmed mansour a ahmed f. It introduces reconfigurable patch antenna with a cslot shape, which is capable of operating in dual band or wideband operations.
Reconfigurable antennas for uwb cognitive radio communication. A reconfigurable wideband and multiband antenna using dual. Design and simulation of reconfigurable antenna for cognitive radio. Reconfigurable antennas synthesis lectures on antennas. Ultrawideband slotted microstrip patch antenna for cognitive. In this chapter, a novel design method was proposed for reconfigurable antennas, independent of the geometries and the dimensions of the antennas, providing wide tuning ranges and controllable selectivity. Reconfigurable microstrip patch antenna for wlan software. In 3, a spectrum sensing survey for cognitive radio strategies is presented. The second structure is a frequency reconfigurable triangularshaped patch for establishing communication with another.