A wideband rectangular microstrip patch antenna with reconfigurable radiation patterns is proposed in this paper, which contains two symmetrically inverted u slots, and incorporates two coaxial probes along the resonant length of the patch. Here, a novel geometry of dualband polarisation reconfigurable patch antenna is presented. The current on the strip perturbed square ring slot antenna with reconfigurable polarization and the ground mainly. The fundamentals of patch antenna design and performance. Kishk published a paper on frequency reconfigurable u slot patch antenna.
This effect can be done by changing the path of current. A compact u slot microstrip patch antenna with reconfigurable polarization is proposed for wireless local area network wlan applications. It allows switching between right hand circular polarization rhcp and left hand circular polarization lhcp. As one right left side point of the circular slot is shorted between the inside of the slot and the rectangular patch, the proposed antenna yields right lefthanded circular polarization. Two antenna prototypes with identical dimensions are designed, fabricated and measured. Introduction recently, a polarization reconfigurable antenna, which can offer various polarizations at the same operating. Study of frequency and polarization reconfigurable on. Survey on different types of reconfigurable patch antenna. Reconfigurability denotes the reconfigurable computing capability of a system, so that its behavior can be changed by reconfiguration, i. Reference 7 proposed an aperture coupled square patch antenna with quadric polarization agility. What is the difference between slot antenna and patch antenna. Actually, slot antenna is a radiating element formed by a slot in a metallic surface. This paper presents a dual band frequency and polarization reconfigurable microstrip antenna. Right hand circular polarization rhcp is obtained as diode.
Polarization diversity can be achieved with single feed itself. The slot antenna is popular because they can be cut out of whatever surface they are to be mounted on, and have radiation patterns that are roughly omnidirectional similar to a linear wire antenna, as well see. It consists of a square patch of side a printed on rt duroid substrate of. Alternate feed methods a common variation in patch antenna design is the location and routing of the feed, to obtain a desired feedpoint impedance, to control the polarization, or for convenient layout. Design of reconfigurable microstrip patch antenna for wlan. Pin diodes are appropriately positioned to change the length of the u slot arms, which alters the antenna s polarization state. This polarization can be either vertical or horizontal depending on the orientation of the patch. A liquid metal conical helical antenna for circular.
Survey on different types of reconfigurable patch antenna for wireless applications 1k. A polarization switchable microstrip patch antenna with a. U slot microstrip patch antennas were originally developed for bandwidth broadening applications. The lumped component can be used to alter antenna performances. Polarization or polarisation for our british friends is one of the fundamental characteristics of any antenna. Basic geometry and basic characteristics of patch antennas 3. For example, when the component is a capacitor, the operation frequency of the slot antenna can be decreased with increasing the capacitance value 1. By using slot on rectangular patch with coaxial probe feed a wide bandwidth. Multiband reconfigurable microstrip patch antenna hemantkumar mane, v. The antenna incorporates a novel positive and negative perturbation technique to achieve di. Compact reconfigurable circularly polarised microstrip. A parametric study has been carried out to investigate the effects caused by different arm length and width. Designing of reconfigurable multiband antenna for wlan.
Pdf polarization reconfigurable uslot patch antenna. Design and fabrication of frequency reconfigurable and. Antenna theory beam and polarization tutorialspoint. Circularly polarized microstrip patch antenna for wireless. A polarization reconfigurable patch antenna with loop slots onthegroundplane. In order to obtain a maximum radiation efficiency and frequency bandwidth a thick patch substrate with a low. Perturbed square ring slot antenna with reconfigurable. By studying the surface current distributions at two. Abstract a varactor diode is placed on every slot to alter the current direction, which determines the polarization state. Jul 30, 2015 in this paper, a single layer asymmetric l slot loaded microstrip patch antenna for circular polarization is proposed. Fabric substrate is used for the proposed antenna for manufactured and designed to steer the beam directions at the operation frequency of 7. Wideband radiation reconfigurable microstrip patch antenna. Slot antennas are used typically at frequencies between 300 mhz and 24 ghz.
Memsswitched u slotted patch antenna for dual polarization the geometry of the polarization reconfigurable antenna is shown in fig. Circularly polarized aperture coupled microstrip antenna with. A polarization reconfigurable antenna can be seen in, where a circular slot was integrated in a circular microstrip patch. Click here to go to our page on circular patch antennas new for september 2018.
We use a simple rectangular, half wave long, probefed patch operating in its fundamental mode as an example. Lets start by understanding the polarization of a plane electromagnetic wave. The polarisation of an antenna is determined by the wave radiated in a given direction that is identical to the direction of the electric field. Fries,mischa grani and rudiger vahdieck, a reconfigurable slot antenna with switchable polarization, ieee microwave and wireless components letters, 11 nov 2003. A transmit antenna needs a receiving antenna with the same polarization for optimum operation. On the use of slots in the design of patch antennas. It can be linearly polarized or circularly polarized. A frequency reconfigurable antenna using the fr4 substrate that switches between an ultra wide band, narrow band, and. A slot antenna consists of a metal surface, usually a flat plate, with one or more holes or slots cut out. When a wave is transmitted or received, it may be done in different. An lshape segment is integrated to the patch using a switching diode. In this paper, a novel low cost, singlefeed and polarization reconfigurable antenna is designed for midband 5g applications. Blekinge institute of technology bth karlskrona, sweden september 20 supervisor. Polarization reconfigurable uslot patch antenna ieee.
Polarization reconfigurable square patch with shorting posts. Reconfigurable patch antennas with fourpolarization. He invented the wideband u slot patch antenna and expanded the u slot technique to small size, dualtriple band, and circular polarization applications. P, india abstract reconfigurable microstrip patch antenna with a u slot is proposed for wearable fabric applications. Polarization of the wave radiated by an antenna is known as antenna polarization. The uslot microstrip patch antenna is designed at 2. A polarization recon gurable patch antenna with loop slots. Microstrip patch antennae, microstrip dipoles, printed slot antennae. A patch antenna radiates power in certain directions and we say that the antenna has. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. The antenna is symmetrical along the yz plane and is excited by a proximity feed of width wf mm. Frequency reconfigurable antenna for wlan and xband. The simple design consists of two slots and two feeds.
Microstrip, multi frequency and u slot antennas, circular polarization, wideband system. The basics of patch antennas, updated orban microwave. A frequency reconfigurable antenna using liquid metal as switching mechanism was proposed by kelley et al. The solution here proposed is based on the use of a. Polarization reconfigurable antenna for midband 5g. An antenna can be polarized depending upon our requirement. A smallsize element antenna for circular polarization was realized by using a circular patch antenna with a cross slot having different arm lengths. The suggested l slot excites the two orthogonal patch modes in phase quadrature for circular polarization without truncating any corner of the probe feed square patch. Circularly polarized microstrip antenna is frequently realized by cutting the slot inside the patch and feeding it along the diagonal axis. Effect of slot on size of antenna with the help of slot size of microstrip patch antenna is reduced. In this paper, a cpwfed circular polarization reconfigurable slot antenna is proposed. 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. Polarization reconfigurable microstrip patch antenna is presented for 2. It can be implemented by unequal length of cross slots on the patch, which are switched on and off using pin diodes.
In proposed work, circularly polarized slot cut circular microstrip antenna at 900 mhz is discussed. A square shape slot is loaded on the ground plane to excite circular polarization by creating a negative perturbation. To overcome these index terms eshaped patch antenna, microstrip antenna, pin diodes, polarization agile, reconfigurable antennas, rf switches. A ring slot antenna is a coplanar structure and as compared to a. Design and analysis of compact u slot microstrip patch. Reconfigurable wideband circulalry polarized microstrip. Keywords reconfigurable microstrip patch antenna, slots, swi tches, dual band, resonant frequency. In order to obtain polarization reconfigurability, several patch antenna configurations have been investigated 57. Vahldieck, a reconfigurable slot antenna with switchable polarization, ieee microwave and wireless components letters. Three pin diodes are inserted in ground plane that controls switching bands. Vidmar, varactortuned microstrippatch antenna with frequency and polarisation. Polarization agile slotring array antenna using magict circuit.
Fries,mischa grani and rudiger vahdieck, a reconfigurable slot antenna with switchable polarization, ieee microwave and. A single probefed reconfigurable circularly polarized microstrip patch antenna with a circular slot is proposed. Reconfigurable antenna has a potential to add some functionality to. The methods developed for efficient wideband patch antenna design are based on one or more of the following principles.
Circular polarization wideband eshaped patch antenna for. The proposed design approach is based on the use of two pairs of switches in order to. Resonance behavior of single u slot microstrip patch antenna. When the plate is driven as an antenna by a driving frequency, the slot radiates electromagnetic waves in a way similar to a dipole antenna. Sensors free fulltext reconfigurable diplexerbased. By controlling the phase shift of applied currents through these probes, the antenna can be set to excite either the sum or the. The patch antenna with adjustable air gap discussed in part 1 is an example of a frequency reconfigurable antenna, which was the first problem we worked on. A circularly polarized smallsize microstrip antenna using a. For example, an insulated slot in a patch, the addition of different slot shapes at the radiating element, such as the lshaped slot, a tshaped slot, an hshaped slot and the fractals slot have also been reported for large bands 59. On the design of slot cut circularly polarized circular. The type of antenna polarization decides the pattern of the beam and polarization at the reception or transmission. By simply changing the bias status of two pin diodes through a ttype bias device, the antenna can work as two independent inverted lshaped slots, and realize reconfigurable performances.
Eshaped patch antenna with reconfigurable circular. Broadband microstrip patch antenna using slot semantic. Antenna gain calculator to calculate the frequencydbi of antennas,the calculator can calculate linear polarization, circular polarization and ellipticalpolarization of antennas based on selection. Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. Circularly polarized cshaped slot patch antenna with reconfigurable polarization ameelia roseline arulandhusamy 1, deepa mayilvavahanan2 1professor,dept. Pin diodes are appropriately positioned to change the. A quadpolarization and frequency reconfigurable square. Polarization reconfigurable microstrip patch antennas. Varactor diode loaded reconfigurable patch antenna with adjustable slots ritika tandon m.
Introduction this article introduces the basic concepts of patch antennas. Research article polarization reconfigurable patch antenna for wireless sensor. A reconfigurable patch antenna consisting of a square patch with two crossshaped diagonal slots is presented. Reconfigurable antennas include frequency reconfigurable antenna, polarization reconfigurable antenna, and pattern reconfigurable antenna. The slot use on the patch s surface affects the radiation characteristics of proposed antenna.
Different techniques are used to achieve multiband and wideband operation of antenna. Pdf polarization reconfigurable patch antenna for wireless. In this paper, an electromagnetic band gap ebg metasurface ms superstratebased circularly polarized antenna for the wimax 3. A comparative analysis of a circularly polarized microstrip. It is defined as ratio between minor and major axis of polarization ellipse.
Printed slot antenna, multiband antenna, rejection. As the antenna is reconfigurable it has two slightly. Frequency and polarization reconfigurable microstrip antenna. The polarisation reconfiguration is controlled via onoff states of the pin diode. These slots typically have a directivity of 2 to 3 db compared. For design the proposed antenna the u shaped slot and a. Polarization reconfigurable aperturefed patch antenna wei lin and hang wong department of electronic engineering and state key laboratory of millimeter waves hk. Research article polarization reconfigurable patch antenna. Dual feed degenerate mode patch is used as the starting point for.
Most of those reconfigurable antennas can switch polarization senses between two cp states, or among one linear and two cp states. A broadband low crosspolarization uslot patch antenna array. Shorter slot length produces narrower axial ratio bandwidth. Design and development of reconfigurable compact cross patch antenna for switchable polarization 209 arms of the slot are tilted by along y. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. A square, loopshaped slot line that divides the patch conductor into interior and exterior sections is located at the centre of the square patch antenna. A reconfigurable microstrip antenna for switchable polarization is proposed by corner truncated square radiating patch and independent biased pin diode to form linear polarization. With the feature of easy reconstruction, liquid metal antennas attracted a growing number of scholars. This static reconfigurability distinguishes between reconfiguration time and run time.
A microstrip patch antenna mpa is a type of antenna that consists of a conducting patch of any planar or nonplanar geometry on one side of a dielectric substrate with a ground plane on other side. A reconfigurable slot antenna with switchable polarization. A quadpolarization and frequency reconfigurable square ring. Patch antenna is actually a patch antenna placed over a antenna base. But in reconfigurable patch antenna using switchable lshaped slots for circuit polarization diversity there is no need of power divider and also multiple feeds. The proposed prototype design consists of two orthogonal arms as a patch, an inclined slotted asymmetric pentagonalshaped ground plane and a pin diode with a biasing circuit. The two feeds are positioned on the right and left diagonal of microstrip antenna. An innovative technique is used in this approach which combines among three techniques namely. The patch mentioned yields horizontal polarizati on, as shown.
The shape and size of the slot, as well as the driving frequency, determine the radiation pattern. The circular polarized cp microstrip antenna msa is realized either by cutting narrow slot inside the coaxially fed msa or by using dual feeds in conjunction with the power divider network, or by cutting asymmetrical u slot or rectangular slot at an appropriate position inside the patch 1 11. Investigations on wideband uslot microstrip patch antenna. An electrical model to uslot patch antenna with circular. It forms solution to the problem of changing in impedance, in which polarization diversity counter the effect of fading in communication. Deschamps in 1953, but didnt become practical until the 1970s when it was developed further by researchers such as robert e. The antenna has low profile with enhanced bandwidth and gain.
Ashish kumar sahu is a record of an original research work carried out by his during 20142015 under my supervision and guidance in partial fulfilment of the requirement for the. Reconfigurable microstrip patch antennas microstrip. Reconfigurable microstrip patch antenna with switchable plarization, etri tournal, 283, june 2006. Deshmukh vpcoe, baramati, maharashtra, india abstract reconfigurable antenna is an alternative to multiband antenna.
Slot antenna differs with patch antenna in many aspects. Among these techniques, a u shaped slot will be used on the patch of the coaxially fed square patch antenna. Introduction the basic geometry of the u slot antenna is shown in figure 1. Vahldieck, a reconfigurable slot antenna with switchable polarization, ieee microwave and wireless components letters, vol. Reconfigurable microstrip patch antenna with a uslot using. Patch antenna with switchable slots pass for dualband operation. Tejbir singh assistant professor, subharti university, meerut, u. In the reported literature, procedure to design them at any given frequency is not available. When the switch is on the electrical size of antenna becomes small and it resonates at higher umts 2100 mhz band.
Second, a polarization reconfigurable single feed eshaped patch antenna with wideband performance is proposed. At the two rf ports an impedance transformer matches the 50. Dynamic reconfigurability denotes the capability of a dynamically reconfigurable system that can dynamically change its behavior. A broadband low crosspolarization uslot patch antenna array based on di. An ieee fellow, he was the recipient of the 2009 john kraus antenna award of the ieee antennas and propagation society for exceptional contributions to the field of antennas. Circularly polarized single feed microstrip patch antennas.
Polarization controlled microstrip antenna, ieee int. First well need to understand polarization of plane waves, then well walk through the main types of antenna polarization. Dual feed degenerate mode patch is used as the starting point for circular polarization and lshaped islands which can be connected or disconnected to the main patch via rf switches are placed around the patch. Design of uslot patch antenna and its geometry the uslot patch antenna produces a wideband beam. A single layer wideband u slot microstrip resonance behavior of single u slot microstrip patch antenna patch antenna array casino menominee mishaped slot antenna for 2. The conductor was fabricated on the three layers square substrate, whose width is g58mm, with a dielectric constant of 10, and substrate thickness of h11. Polarization reconfigurable patch antenna for wireless. Introduction reconfigurability has become a crucial feature in m odern wireless communication world. Antenna reconfiguration is enabled with the aid of two rf switches inserted in appropriate locations on each slot of the eshaped patch. The antenna is capable of switching from righthand circular polarization rhcp to lefthand circular polarization lhcp and vice versa, with the aid of two rf pin diodes that act as rf switches. By controlling the phase shift of applied currents through these probes, the antenna can be set to excite either the sum or the difference mode. The antenna radius was reduced by about 22% by of using slot lengths which are nearly equal to the diameter ofthe circular patch antenna. Antenna gain calculator to calculate the frequencydbi of antennas,the calculator can calculate linear polarization, circular polarization and elliptical polarization of antennas based on selection. Single feed lslot microstrip antenna for circular polarization.
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