Ieee websites place cookies on your device to give you the best user experience. Design of a compact ultrawideband ushaped slot etched on a. The antenna tuning is realized by changing its effective electrical length, which is controlled by the bias voltages of the solid state shunt switches along the slot antenna. Introduction reconfigurable antenna is an emerging area of research as it helps in increasing the.
Fries,mischa grani and rudiger vahdieck, a reconfigurable slot antenna with switchable. Introduction reconfigurable antenna is an emerging area of research as it helps in increasing the system capacity and realizing multiple functions. The type of antenna polarization decides the pattern of the beam and polarization at the reception or transmission. Connected uslots patch antenna for wimax applications. An u sha 2 1,associate professor, 2 assitant professor. A dualband circularlypolarized patch antenna with a. Polarization controlled microstrip antenna, ieee int.
Compact size, patch antenna, polarization reconfigurable, pin diodes. At the two rf ports an impedance transformer matches the 50. A single probefed reconfigurable circularly polarized microstrip patch antenna with a circular slot is proposed. Actually, slot antenna is a radiating element formed by a slot in a metallic surface. A frequency reconfigurable patch antenna design based on the. Reconfigurable magnetoelectric dipole antennas for base. Vahldieck, a reconfigurable slot antenna with switchable polarization, ieee microwave and wireless components letters, vol. My intention for posting just pictures with dimensions is for. Linear polarization horizontal or vertical pole is discussed.
The basics of patch antennas, updated orban microwave. The proposed antenna is suited for the wimax and wifi application. A circularpolarization reconfigurable mengshaped patch antenna. This antenna is often built of printed circuit board material and the substrate makes up the patch antennas dielectric. It can be linearly polarized or circularly polarized. What is the difference between slot antenna and patch antenna. Study of frequency and polarization reconfigurable on square.
An antenna array includes a plurality of subarrays each having a plurality of linearly polarized antenna elements, with each antenna element having an orthogonal feed orientation with respect to its adjacent antenna elements, and at least two feed lines each connected by at least one subfeed line to at least two antenna elements having orthogonal feed orientations such that each antenna. The antenna consists of a monopole circular patch with radius and feedline length printed on a taconic substrate. Design of a dualband frequency reconfigurable patch antenna. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. Antenna theory beam and polarization tutorialspoint. Although the design is based on a resonant configuration, an effective bandwidth of 1. The experimental models are madeof fr4 epoxy substrate. In 68, variations of the u slot were introduced as a new technique to achieve cp, besides.
Vidmar, varactortuned microstrippatch antenna with frequency and polarisation. This polarization can be either vertical or horizontal depending on the orientation of the patch. Study of frequency and polarization reconfigurable on. Reconfigurable antennas synthesis lectures on antennas. A polarizationreconfigurable high gain microstrip antenna. Another example is the design of a microstrip uslot patch antenna that can.
Antenna reconfiguration is enabled with the aid of two rf switches inserted in. Slot antennas are used typically at frequencies between 300 mhz and 24 ghz. Consequently, the proposed antenna can be made small size and compact compared with a linearly polarized patch antenna with a single slot. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. This leads into the discussion of antenna polarization. Emi, patch antenna, dgs, reconfigurable antenna, pin diode 1. The basic monopole slot antenna providing notch band from 2. The distance between the patch and the ground plane the. Polarization reconfigurable capability has been successfully added to a conventional eshaped patch antenna. Polarization reconfigurable twolayer stacked patch antenna design for wifi. A dualband circularlypolarized patch antenna with a novel.
To this end, reconfigurable cp antennas have been reported extensively in the literature, using variety of structures such as crossed dipole 2,3, patch 4 5678, radiating arms 9 and. Basic geometry and basic characteristics of patch antennas 3. This resulted in an axial ratio bandwidth of about 19. An u sha 2 1,associate professor, 2 assitant professor department of electronics and communication engineering, kumaraguru college of technology,coimbatore, india. May 25, 2019 slot antenna differs with patch antenna in many aspects. 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. A patch antenna is a type of radio antenna with a low profile, which can be mounted on a flat surface. An electronically reconfigurable patch antenna design for. A multiband reconfigurable slot antenna for wireless. A multiband frequency and pattern reconfigurable antenna for wifiwimax and wlan. Accordingly it is expected that a wideband polarization recon. The antennas had been designed, simulated and parametricall. Polarization reconfigurable microstrip patch antenna is presented for 2. A novel polarization reconfigurable cut ring microstrip antenna with high gain is proposed.
In this paper, we introduce a reconfigurable artistic patch antenna with unidirectional circularpolarization cp radiation. Reconfigurable microstrip patch antenna with switchable plarization, etri tournal, 283, june 2006. Fries,mischa grani and rudiger vahdieck, a reconfigurable slot antenna with switchable polarization, ieee microwave and wireless components letters, 11 nov 2003. The current distribution of an eshaped patch antenna in state 3 is shown in fig. Slot antenna differs with patch antenna in many aspects. A twolayer stacked microstrip patch antenna designed for 2. Azaro r, fimognari l, massa a 2007 a planar electronically reconfigurable wi fi. The wideband planar reconfigurable polarization antenna array is assigned to the united states government and is available for licensing for commercial purposes. First a modified triangle shaped antenna with partial ground plane is designed as illustrated in configuration antenna a of fig. Circular polarized antennas will increase your wireless network performance in busy and crowded envirnments where standard vertical and horizontal polarization is not working. 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.
Reconfigurable antenna technology frequency reconfigurable antennas are implemented utilizing pin. On the use of slots in the design of patch antennas. Polarization reconfigurable pattern reconfigurable. Tarricone department of innovation engineering university of salento via monteroni, lecce 73100, italy abstracta recon. Design layout for uslot patch antenna a front view. In order to obtain polarization reconfigurability, several patch antenna configurations have been investigated 57. A circularly polarized smallsize microstrip antenna using a. Pin diodes are appropriately positioned to change the length of the u slot arms, which alters the antennas polarization state.
Figure 1 shows the dimensions and geometry of the designed antenna. It consists of a flat rectangular sheet or patch of metal, mounted over a larger sheet of metal called a. Patch antenna is actually a patch antenna placed over a antenna base. A quadpolarization and frequency reconfigurable square ring. Design of a compact ultrawideband ushaped slot etched on. Pdf polarization reconfigurable uslot patch antenna. The effective overlapped bandwidth is 16% covering 5.
Us93975b1 wideband planar reconfigurable polarization. An antenna can be polarized depending upon our requirement. Among these techniques, a u shaped slot will be used on the patch of the coaxially fed square patch antenna. Design and analysis of compact u slot microstrip patch. Antenna consists of circular patch with uslot at the center and two pin diodes to make it as reconfigurable and dielectric substrate of permittivity 4. Request pdf frequency reconfigurable uslot microstrip patch antenna a. Polarization reconfigurable uslot patch antenna ieee. Although frequency reconfigurability and multiband operation are provided by these antennas, still critical limitations in terms of antenna gain, size. This antenna is often built of printed circuit board material. Reconfigurable antennas for wireless communications. The patch mentioned yields horizontal polarizati on.
A compact u slot microstrip patch antenna with reconfigurable polarization is proposed for wireless local area network wlan applications. In a frequency reconfigurable triband antenna fed with a coplanar waveguide is proposed where the antenna elements are arranged in orthogonal alignment using polarization diversity technique. Two antenna prototypes with identical dimensions are designed, fabricated and measured. 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. All the three designs 68 are based on similar foursectional me. Polarization reconfigurable patch antenna for wireless. 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. A transmit antenna needs a receiving antenna with the same polarization for optimum operation. The polarization or polarisation of electromagnetic em waves or fields is introduced.
A polarization reconfigurable patch antenna with loop. Opposite corners have been slotted on each patch, and a diode on each slot is used for. It allows switching between right hand circular polarization rhcp and left hand. Antenna consists of circular patch with u slot at the center and two pin diodes to make it as reconfigurable and dielectric substrate of permittivity 4.
A dualband polarization reconfigurable antenna for wlan systems. Polarization reconfigurable antenna, circular patch, slit perturbations. The proposed antenna was designed and tested to verify circularly polarizing operation. Blekinge institute of technology bth karlskrona, sweden september 20 supervisor. Reconfigurable notch band monopole slot antenna for wlan. For example, when the component is a capacitor, the operation frequency of the slot antenna can be decreased with increasing the capacitance value 1. Electric surface current distribution on the eshaped patch antenna in state 3 during one time cycle. Introduction antenna spreads out a radio frequency rf signal generated in transmitter through space and gets it back at receiver. Microstrip patch antennas or simply patch antenna are increasingly useful because the antenna is printed directly onto a circuit board. When a wave is transmitted or received, it may be done in different directions. This simple structure microstrip antenna consists of a ring radiation patch, two switches pin diodes. Reconfigurable radial line slot array rlsa antenna for beam shape. The polarization loss factor is sometimes referred to as polarization efficiency, antenna mismatch factor, or antenna receiving factor.
The broadband characteristic of a microstrip patch antenna with ushaped slot has been confirmed by many published results 24. Design of double uslot patch antenna a low profile double uslots antenna for wimax operation has low return loss and bandwidth. What is the difference between slot antenna and patch. Frequency reconfigurable uslot microstrip patch antenna. A compact uslot microstrip patch antenna with reconfigurable polarization is proposed for wireless local area network wlan applications. A quadpolarization and frequency reconfigurable square. Reconfigurable antennas frequency reconfigurable antennas polarisation. Wideband radiation reconfigurable microstrip patch antenna.
It consists of a square patch of side a printed on rt duroid substrate of. Pin diodes are appropriately positioned to change the. Also, several designs of broadband slots antenna have been reported 5. Alternate feed methods a common variation in patch antenna design is the location.
Circular polarization reconfigurable antennas have drawn lots of attention in recent years, since they have both the merits of circular polarization antenna capable of mitigating the multipath effect and flexibility in the orientation of the transmitting and receiving antennas, and reconfigurable antenna satisfy the requirements for increased functionality within a. A compact eshaped antenna with cshaped slots and a back. The patch mentioned yields horizontal polarizati on, as shown. A polarization reconfigurable patch antenna with loop slots on the ground plane article in ieee antennas and wireless propagation letters 11 december 2012 with 840 reads how we measure reads. The fundamentals of patch antenna design and performance. Design of reconfigurable slot antennas ieee journals. In this section, we present three polarization reconfigurable me dipole antennas. A new microstrip dualband polarization reconfigurable antenna is presented for wireless local. Eshaped patch antenna with reconfigurable circular. Therefore, lhcp could be generated at the resonant frequency. 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. 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. It allows switching between right hand circular polarization rhcp and left hand circular polarization lhcp.
This article is brought to you for free and open access by the electrical. Loop resonator slot for improved bandwidth performance in wifi applications. A slot is etched on the ground plane of the antenna, where two varactor diodes are. Designing of reconfigurable multiband antenna for wlan. As one right left side point of the circular slot is shorted between the inside of the slot and. 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. A circularpolarization reconfigurable meng shaped patch.
Cp was obtained by loading the square slot with a tshaped strip and two microstrip tjunctions. Geometry of the polarization reconfigurable me dipole antenna 8. As a result, the lp antenna will have a polarization mismatch loss of 0. The lumped component can be used to alter antenna performances. A dualfrequency microstrip patch antennas has been presented and used for 802. 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. A circularly polarized smallsize microstrip antenna using.
The slot antenna is popular because they can be cut out of whatever surface they are to be mounted on, and have. An electrical model to uslot patch antenna with circular. A frequency reconfigurable antenna with triple linear polarization and wide. I built this slot antenna several years ago and have used it with very good results in illuminating a parabolic dish for 2. Reconfigurable monopole antenna with notch filter for uwb. A reconfigurable slot antenna with switchable polarization. Polarization reconfigurable twolayer stacked patch antenna. The measured antenna gain maintains stability at approximately 8. Abstract we present the design of a triband eshaped printed antenna with c. A polarization switchable microstrip patch antenna with a. The evolution step of the proposed antenna is illustrated in fig. The antenna consists of a monopole circular patch with radius and feedline length printed on a taconic substrate with relative permittivity of 4. Reconfigurable patch antennas have drawn a lot of research interest for future. Additional benefits of patch antennas is that they are easily.
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