The prospect of tunable graphenebased nano antenna for wireless communication is discussed. Pattern reconfigurable antennas are usually designed using movablerotatable structures or by using switchable and reactivelyloaded parasitic elements. In this paper, frequency reconfigurable slot patch antenna with reflector at the back of an antenna is presented. A gridslotted patch with two tunable varactors is placed on the top layer, a microstrip line is placed in the middle of two. This patch can be dynamically reconfigured to radiate either a circularly polarized or dual linearly polarized radiation patterns.
Multiband, frequency reconfigurable, and metamaterial. Ideally, a reconfigurable antenna should be able to alter its operating frequency, impedance bandwidth, radiation pattern, and polarization to accommodate the operating needs. Design of a dualband frequency reconfigurable patch antenna. Radiation pattern reconfigurable antenna for wban and wlan. Measuring radiation patterns of reconfigurable patch antennas. In this paper, frequency reconfigurable slotpatch antenna with reflector at the back of an antenna is presented. Wideband radiation reconfigurable microstrip patch antenna loaded with two inverted uslots abstract. The antenna dimensions and the capacitance value determine the two frequencies and their ratio. The basics of patch antennas, updated orban microwave. The antenna has a main radiator and four parasitic elements printed on a dielectric substrate. In this work, we present a systematic numerical analysis of the terahertz radiation scattering on a graphenebased nanopatch antenna. 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. The antennas are mostly used in array configuration, feed. A new reconfigurable koch loop fractal antenna model has been proposed and its properties discussed using hfss software.
The patch version was figured using the first order koch loop. Reconfigurable patch antennas with fourpolarization. In order to produce directional radiation pattern at all frequency bands, a reflector is installed at the back of the frequency reconfigurable slotpatch antenna 23. Frequency reconfigurable microstrip patchslot antenna with. This paper presents a novel lowprofile high gain frequency reconfigurable patch antenna with unidirectional radiation pattern by using a gridslotted patch with tunable varactors loading. In 6 reconfigurable dualband antenna for wireless applications has been reported with very wide range tenability.
The microstrip antennas radiation arises from the fringing fields, which are due to the advantageous voltage distribution. The designed antenna operates at the expected 60 ghz 5g frequency band with a central coaxial probe feed. A square patch of side a is printed on rt duroid substrate. Using only one switch and a single patch, the antenna operates at 4. A slot is etched on the ground plane of the antenna, where two varactor diodes are placed on each side of the slot in order to tune the lower band. In order to provide a dynamic response, reconfigurable antennas integrate an inner mechanism that enable the intentional redistribution of the rf currents over the antenna surface and produce reversible modifications of its properties. By controlling the onoff states of the five pin diodes mounted on the arcshaped slot, the effective length of the arcshaped slot and the effective length of antennas current are changed, and accordingly six. The center dipole is connected to 50 ohm transmitter and the.
The pattern reconfigurable metasurfaced parms antenna is composed of a planar semicircular ms placed directly atop of a planar circular patch antenna with a diameter of 70 mm 1. Study of frequency and polarization reconfigurable on square. The first resonant frequency shifts down by varying. Reconfigurable antennas synthesis lectures on antennas. Design of reconfigurable microstrip patch antenna for wlan. Radiation pattern reconfigurable microstrip patch antenna. Apr 16, 2016 a compact reconfigurable antenna with an omnidirectional mode and four directional modes is proposed. Comments on wideband radiation reconfigurable microstrip. Glenn research center, cleveland, ohio an apparatus and technique have been devised for measuring the radiation pattern of a microwave patch an tenna that is one of a number of identi. With this technique, the antenna can switch its pattern between conical and broadside radiations. By introducing patches of koch loop shapes, the antenna with different radiation patterns were formed using rf switches to.
We propose a reconfigurable microstrip patch antenna with no additional matching circuits for wlan systems at 2. A wideband rectangular microstrip patch antenna with reconfigurable radiation patterns is proposed in this paper, which contains two symmetrically inverted uslots, and incorporates two coaxial probes along the resonant length of the patch. The present paper demonstrates a frequency and polarization reconfigurable microstrip patch antenna with simple feed structure. Study of frequency and polarization reconfigurable on. A cylindrical phantom is considered to know the effect of the antenna when it is close to the muscle at 2. Reconfigurable patch antenna radiations using plasma faraday shield effect oumar alassane barro, mohamed himdi, olivier lafond. Design and implementation of reconfigurable microstrip. Reconfigurable antennas can also be used in modern space applications. A wideband rectangular microstrip patch antenna with reconfigurable radiation patterns is proposed in this paper, which contains two symmetrically inverted. This will help increase the radiation efficiency, gain, and the bandwidth. Typical half wave patches have efficiencies well above 90%.
The width can be used to vary the input impedance of the patch. Design of a dualband frequency reconfigurable patch. Survey on different types of reconfigurable patch antenna for wireless applications 1k. The 2 x 2 antenna array is designed and investigated.
Survey on different types of reconfigurable patch antenna for. The work on singlefeed frequency and polarization reconfigurable microstrip patch antenna is reported earlier. A frequency reconfigurable patch antenna design based on the characteristic mode analysis is presented. Nanbo jin designed the patch antenna 2 with switchable slot pass. A compact reconfigurable antenna with an omnidirectional mode and four directional modes is proposed. By elevating the patch, antenna topology effectively will create a low dielectric substrate since the antenna substrate is essentially air, which is the lowest possible dielectric constant. Reconfigurable patch antennas with fourpolarization states.
It can switch between linear polarization lp, rhcp and lhcp at dual frequency. Compact reconfigurable antenna with an omnidirectional. A reconfigurable radiation pattern antenna reduces the effects of noisy environments by changing the null positions, and it saves energy by adjus ting the main beam signal towards the intended user to improve the overall system performance. This paper proposes radiation reconfigurable patch antenna using feeding delay line technique. Frequency reconfigurable circular patch antenna with an arc. Polarization reconfigurable patch antennas with four polarization agility are investigated in this paper. A novel single feed frequency and polarization reconfigurable. Reconfigurable antennas, with the ability to radiate more than one pattern at different frequencies and polarizations, are necessary in modern telecommunication systems. Reconfigurable dualband patch antenna using varactorloaded slot. Polarization reconfigurable microstrip patch antenna for wireless communication applications.
Survey on different types of reconfigurable patch antenna. Reconfigurable patch antenna radiations using plasma. Reconfigurable dualband patch antenna using varactor. A graphene rectangular patch with length l and width w supported by a dielectric substrate of thickness d is illuminated by a plane wave linearly polarized along the patch length. Sep 01, 20 polarization reconfigurable patch antennas with four polarization agility are investigated in this paper. Reconfigurable integrated patch antenna for g band. Keywords reconfigurable microstrip patch antenna, slots, swi tches, dual band, resonant frequency. Antenna design the antenna design of the proposed antenna is shown in fig.
In such cases, it is required to be able to reconfigure the antenna radiation pattern to serve a new coverage zone, limit fading in rainy areas, and maintain high data rate at as many frequency bands as possible. Keywords frequency reconfigurable antenna, mobile antenna, yagi uda antenna, patch antenna component. In this paper, a compact frequency reconfigurable circular patch antenna with an arcshaped slot loaded in the ground layer is proposed for multiband wireless communication applications. Wireless communication and sensing systems have experienced enormous development over the past two decades.
By controlling the phase shift of applied currents through these probes, the antenna can be set to excite either the sum or the. Fabryperot model of the plasmon polariton interaction with graphenebased antenna is introduced. If the antenna had a 100% radiation efficiency, all directivity would be converted to gain. Reconfigurable beam steering using circular disc microstrip patch antenna with a ring slot is proposed. The antenna was switched to different modes by controlling the states of the diodes. The dualfed antenna can operates on two orthogonal linear polarizations simultaneously and on two orthogonal circular polarizations alternatively by controlling the perturbation elements on a square patch antenna. A reconfigurable antenna is an antenna capable of modifying its frequency and radiation properties dynamically, in a controlled and reversible manner. Manikannan 1,2assistant professor, ck college of engineering and technology, cuddalore, tamil nadu abstract with the rapid advancement in wireless communication, reconfigurable antenna is gaining greater attention. Omnidirectional microstrip patch antenna with reconfigurable. The associated scattering problem is then solved numerically, and the. Frequency reconfigurable patch antenna with bias tee for. They are light in weight, smaller in dimension and lower in price.
Design and implementation of reconfigurable patch antennas for wireless communications fei he, m. 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. The features of reconfigurable patch antennas, such as enhanced bandwidths, operating frequencies, polarizations, radiation patterns, etc. A frequency reconfigurable printed microstripfed patch antenna is proposed here. Example consider a symmetric threeelement dipole antenna array consisting of half wavelength dipole antennas, shown in figure 2. Compact microstrip antenna with patternreconfigurable. A gridslotted patch with two tunable varactors is placed on the top layer, a microstrip. In order to produce directional radiation pattern at all frequency bands, a reflector is installed at the back of the frequency reconfigurable slot patch antenna 23. Graphenebased nanopatch antenna for terahertz radiation.
In 7 reconfigurable patch antenna for satellite and terrestrial application has been reported. Frequency reconfigurable circular patch antenna with an. Omnidirectional microstrip patch antenna with reconfigurable pattern and polarisation. Comments on wideband radiation reconfigurable microstrip patch antenna loaded with two inverted uslots abstract. Frequency reconfigurable microstrip patchslot antenna with directional radiation pattern by h. From all the above papers, the radiation patterns of. New radiation patternreconfigurable 60ghz antenna for 5g. Measuring radiation patterns of reconfigurable patch antennas on wafers tests can be performed relatively inexpensively and without sawing wafers. The patch antenna is therefore a voltage radiator, as opposed to the wire antennas, which radiate because the currents add up in phase and are therefore. Here, our work was to carefully associate the previously designed quasilumped hybrid coupler and a patch antenna resonating at 3. The antenna design is based on having pairs of symmetrical slots to form branches. Frequency reconfigurable microstrip patch slot antenna with directional radiation pattern by h. Smith, reconfigurable aperture program recapmems revolutionary.
This concept is implemented to design a novel reconfigurable antenna with both frequency and polarization diversities. They are bringing information to us with convenience and flexibility at low cost. Radiation pattern reconfigurable antenna radiation pattern reconfigurability is based on the some modification of the spherical distribution of radiation pattern. Reconfigurable antenna wikimili, the best wikipedia reader. The multiport antenna approach can provide better spherical coverage, however at the. Polarization reconfigurable microstrip patch antenna for. Reconfigurable microstrip patch antenna using mems technology. A wideband rectangular microstrip patch antenna with reconfigurable radiation patterns is proposed in this paper, which contains two symmetrically inverted uslots, and incorporates two coaxial.
Reconfigurable integrated patch antenna for g band applications. Introduction reconfigurability has become a crucial feature in m odern wireless communication world. Switches can be mounted over these slots to obtain different resonant frequencies. The antenna consists of two stacked substrates and three metal layers. Reconfigurable wideband patch antenna for cognitive radio. A radiation pattern reconfigurable antenna designed using metasurface ms is proposed in this study. A gridslotted patch with two tunable varactors is placed on the top layer, a microstrip line is placed in the middle of two substrates. Fundamental specifications of patch antennas radiation pattern a patch antenna radiates power in certain directions and we say that the antenna has directivity usually expressed in dbi.
The mainbeam direction of the antenna has an angle of. A lowprofile frequency reconfigurable gridslotted patch. In this paper, a compact microstrip antenna with radiation pattern reconfigurable characteristic employing mems switches is proposed and investigated. Reconfigurable antennas differ from smart antennas because the reconfiguration mechanism lies inside the antenna. Measuring radiation patterns of reconfigurable patch. Design and implementation of reconfigurable microstrip patch. Reconfigurable antenna can be classified into four types such as frequency, polarization, radiation and multiple reconfigurable antennas 1. As we have to ultimately match the patch input impedance to 50ohms, we can control input impedance to some extent by changing the patch width w. The patch geometry is similar to the design in 5, however the switch is replaced by a capacitor, which leads to a totally new radiation performance. Reconfigurable microstrip patch antenna for wlan software. The microstrip patch antenna produces three reconfigurable frequency bands while the slot produces another three frequency bands at the lower frequency region. A novel polarization reconfigurable patch antenna with integrated mems actuators is presented for the first time. The proposed antenna consists of a microstrip patch. Two shorting walls were controlled by the pin diodes and another two were directly connected to the patch.
Highlights scattering of terahertz radiation on a graphenebased nano patch antenna is numerically analyzed. This comment investigates some missing fundamental simulation and measurement results affecting the practical performance of the antenna presented in 1. Wideband radiation reconfigurable microstrip patch antenna. Compared to other antennas, reconfigurable antennas have more advantages and better prospects. A lowprofile frequency reconfigurable gridslotted patch antenna. Reconfigurable koch loop fractal antenna using rf switch. In this paper, a new approach to design a reconfigurable dual band antenna is introduced.
1090 537 1036 1014 97 1211 1189 1009 225 547 1289 1328 81 518 461 407 1592 562 648 394 542 975 1536 1338 59 652 1053 105 369 551 233 359 999 388 887 311 1119 1063 1386 1423 1152 647 49