The antenna structure is intended for active antenna wlan applications. It gives broadside radiation pattern over entire vswr bw with peak antenna gain of more. The performance of a circularly polarized microstrip patch antenna is improved using a circular mushroomlike substrate. The wideband circularly polarized radiation of the antenna is achieved using a microstrip stub in the lower patch and a stacked slotted square patch. The sequentially rotated seriesparallel stub technique is. A circularly polarized antenna array with gain enhancement for longrange uhf rfid systems wei hu 1,2, guangjun wen 1, daniele inserra 1, yongjun huang 1, jian li 1 and zhizhang david chen 2,3,4. Eventhough the proposed antenna has a compact radiating patch, high gain 4. Within the bandwidth, symmetric cp radiation pattern over almost the entire. In the literature, csssrr has been widely used 6,7. Therefore, we are concerned about enhancement of a circularly polarized antenna gain. To improve the 3db axial ratio bandwidth arbw, two symmetric parasitic rectangular patches paralleled to a central. Circularly polarized single feed microstrip patch antennas are widely employed in radar, gps and mobile communication systems. Modified triangular shape microstrip antenna for circular. Highgain circularly polarized microstrip patch antenna with.
A circularly polarized antenna array with gain enhancement. Circularly polarized antenna development thread page 11. Wideband compact circularly polarized sequentially rotated. Four slot simulated gain the four slots gain of the antenna is shown in fig. A circularly polarized smallsize microstrip antenna using. While broadband circularly polarized antennas have been proposed based on. In this letter, a fourelement highgain circularly polarized microstrip antenna array operating in the kaband is proposed.
A compact and broadband circularly polarized microstrip patch antenna structure with tshaped electromagnetically coupled ports was designed, simulated, fabricated and tested. Keywords aperture coupled microstrip antenna, back radiation reduction, circularly polarized microstrip antenna, crossslot coupled. A singlefed microstrip patch antenna mpa with loading of shorting pins for high gain circularly polarized cp radiation is proposed in this. The radiation pattern of the antenna shows that the. The designed circular polarization antenna is realized by a cross slot with unequal length of slots on a circular patch and fed by a coupling microstrip. Gain enhancement of a circularly polarized microstrip patch antenna. Measurement of a circularly polarized patch antenna at 1.
Circular or linear polarized antenna for fpv oscar liang. Circularly polarized aperture coupled microstrip antenna with. The proposed antenna consists of a central patch and a microstrip line radiator. Akkaraekthalin, simultaneous gain and bandwidths enhancement of a singlefeed circularly polarized microstrip patch antenna using a meta material. A broadband singlefeed circularly polarized patch antenna. Gain and efficiency since designed antenna has no gain at phi direction, it is not presented.
The antenna was to be measured using a constructed dipole antenna and a hewlett packard 8753c. The purpose of this paper is to propose a smallsize circular patch antenna. We propose a coupled squareshape split ring resonators metamaterial structure as a superstrate for a circularly polarized microstrip patch antenna to achieve simultaneous enhancement on its gain and bandwidth the coupled squareshape split ring resonators metamaterial superstrate is shown to enhance the bandwidth by a factor of 2 and to increase the gain of the antenna by 8. A compact singlefeed circularly polarized microstrip antenna is proposed to achieve. Two self biased ferrite disks are inserted in the resonant region of the patch to. Of course, a 90 degree phase shift will result in circular polarization of the opposite sense. For improving the gain of antenna, an air dielectric layer and the parasitic patch with a lower dielectric substrate is used. Circularly polarized microstrip patch antenna research india. Desing of a circularly polarized patch antenna for satellite communications in lband department of signal theory and communications polytechnic university of cataluna. Microstrip antenna has been used in every field, due to its many advantages. Circularly polarized twodimensional microstrip standingwave. A compact design of a single feed microstrip antenna for. In iwasaki, 1996, a circularly polarized circular microstrip antenna with the centrally located crossslot in the patch conductor is introduced. A circularly polarized corner truncated square microstrip patch antenna was mounted on a threedimensional square ground structure in 10.
A compact singlefeed circularly polarized microstrip antenna with. A novel circularly polarized microstrip antenna using triple proximityfed method is proposed in this paper. Circularly polarized microstrip yagi antenna array with. Design of a s band circularly polarized microstrip patch. The basics of patch antennas, updated orban microwave. Multiplefeed method can realize the circular polarization for a microstrip antenna.
Introduction satellite communication requires robust, high gain, small. The ar bandwidth of the antenna was found to be 64% 2. The hpbw obtained in the left hand circularly polarized lhcp radiation was around 110. Gupta1 abstract the design of a microstrip patch antenna in the s band for nanosatellite application is presented.
A method to enhance gain of a circularly polarized cp microstrip patch antenna is proposed. This method provides reliable values for linearly polarized antennas having spatial diagrams with a reasonably circular symmetry. In the feeding network, a threeway circularsector power divider is adopted to distribute the current equally to each feed. A kaband 26 ghz circularly polarized 2x2 microstrip patch. In particular, we are designed to be able to services for 5. The array has four broadband dualfeed uslot patch antenna elements with circular. Such antenna unit is composed of one main radiation patch and one parasitic radiation patch with air as the dielectric spacer. Compact dual circularlypolarized microstrip antennas. A circularly polarized smallsize microstrip antenna with a.
In this paper, a novel wideband circularly polarized cp millimeter wave mmwave microstrip antenna is presented. Design of a s band circularly polarized microstrip patch antenna using ferrite disk aakash1, s. Design of a smallsize broadband circularly polarized microstrip. Right hand circularly polarized microstrip antenna with two. This thesis presents a new design for a circularly polarized antenna based on a circular microstrip patch. This was done using a copper ground plate and plastic. Gupta1 abstract the design of a microstrip patch antenna in the s band for nano. For figure 2 feeding the patch antenna with the feedline on the underside of the substrate laminate. An antenna array composed of four inclined microstrip yagi antennas is proposed for a direction finding df system operated in l band. Circularly polarized microstrip patch antenna scialert responsive. We etch coupled squareshaped split ring resonators csssrrs on both sides of a superstrate which is. The antenna had a peak gain of 9 db and an average gain of 8. The proposed antenna is designed using a combination of.
The crossrectangular slot provides necessary perturbation to. Index termsmicrostrip patch antenna subarray, kaband, circular polarization i. While generally regarded as a receiver antenna, it works well as a transmit antenna too. In other research, microstrip patch antennas on a normally magnetized ferrite substrate were found to radiate a cp pattern 1820. A circularly polarized antenna array with gain enhancement for longrange uhf rfid systems wei hu 1,2, guangjun wen 1, daniele inserra 1, yongjun huang 1, jian li 1 and zhizhang david chen 2,3,4, 1 school of information and communication engineering, university of electronics science and technology of.
Broadband circularly polarized patch antenna with parasitic strips. Design of slotted ground hexagonal microstrip patch antenna. Each element antenna is designed to have a tilted beam toward a. Single feeding is used because it is simple, easy to manufacture, low in cost and compact in structure.
The circular polarization radiation is produced by adjusting 120 phase shift between the feeds. The paper presents the steps of designing the circular patch micro strip antenna. Compact wideband circularly polarized antenna with symmetric. Our main research topic in this chapter was how to improve the axial ratio bandwidth of a circularly polarized microstrip antenna. The patch is coupled to four asymmetric cross slots via a microstrip ring with eight matching segments. We etch coupled squareshaped split ring resonators. The fundamentals of patch antenna design and performance. Results show that the proposed circularly polarized microstrip patch antenna has very small size, wide bandwidth, moderate gain and very good axial ratio. For circular polarized antennas, however, these methods for measuring radiation pattern, and principally gain, may lead to unacceptable errors. Design of circularly polarized microstrip patch antenna with. The resonant frequency of a single fed circularly polarized microstrip antenna with a thin diagonal a patch antenna with a 900 hybrid 6.
The crossrectangular slot provides necessary perturbation to excite dual orthogonal modes to generate the circular polarization. Circularly polarized cp microstrip antennas and arrays are widely used in wireless. The antenna radiation reflected lesser in antenna with fss layer by 7. A new triple proximityfed circularly polarized microstrip. Circularly polarized twodimensional microstrip standingwave array antenna advisor. Wideband circularly polarized microstrip antenna with. Circularly polarized single feed microstrip patch antennas.
Circularly polarized tstub coupled microstrip antenna. Single feeding is used because it is simple, easy to manufacture, low in cost and compact. Circularly polarized microstrip antennas are classified as singlefed type or dualfed type, depending on the. Many types of microstrip antennas have been proposed and investigated 1. Properties of a basic microstrip patch a microstrip or patch antenna is a lowprofile antenna that has a number of advantages over other antennas. The measured 10 db returnloss bandwidth of the antenna was around 21% 833 mhz to 1033 mhz, and the 3 db. The patch is coupled to four asymmetric cross slots via a microstrip ring with eight matching segments underneath the ground plane, traversing through the arms of the cross slots in a serial manner. Pdf a method to enhance gain of a circularly polarized cp microstrip patch antenna is proposed. Pdf compact circularly polarized microstrip patch antenna for.
Introduction satellite communication requires robust, high gain, smallsize, light weight, circularly polarized cp data links that can reliably operate for long periods of time in harsh conditions. Gain enhancement for circularly polarized microstrip patch. A wideband circularly polarized stacked slotted microstrip. The cp radiation is achieved by loading a rectangular slot on the ground plane. A band highgain circularly polarized microstrip antenna. A singlefed microstrip patch antenna mpa with loading of shorting pins for highgain circularly polarized cp radiation is proposed in this. Introduction the microstrip antennas msas are the most rapidly developing area in the antenna field in the. This antenna is used for general purpose flying where aerodynamic drag e. This paper presents a wideband and high gain circularly polarized ultrahigh frequency uhf radio frequency identification rfid reader microstrip antenna and array. The sequentially rotated seriesparallel stub technique is employed in constructing the feed network to allow symmetrical positioning of microstrip patch elements, resulting in good axial ratio of polarization. The driven patch is perturbed from one d by d square patch by cutting two opposite corners with the truncation depth determined by the. Microwave office simulator is used to compute the gain, power, radiation pattern. While broadband circularly polarized antennas have been proposed based on parasitic strips 6, metasurface superstrates 7, slot arrays 8, patch arrays 9, and split.
A broadband singlefeed circularly polarized patch antenna with wide beamwidth is presented. Keywords aperture coupled microstrip antenna, back radiation reduction, circularly polarized microstrip antenna, crossslot coupled, microstrip antenna with resonant slots. In this paper, we will design a high gain microstrip patch antenna with circular polarization characteristics that can be used for gps applications operating in the l1 1. A circularly polarized smallsize microstrip antenna using a. Akkaraekthalin, simultaneous gain and bandwidths enhancement of a singlefeed circularly polarized microstrip patch antenna using a meta material reflective surface, progress in electromagnetics research b, vol. Highgain circularly polarized microstrip patch antenna. Skewplanar wheel antenna is circularly polarized and has excellent multipath rejection capability. Axial ratio bandwidth of a circularly polarized microstrip. The objective of this thesis is to design a single fed circularly polarized microstrip antenna that operates at 2. This was done using a copper ground plate and plastic spacers to separate the ground from the patch.
The proposed antenna is designed using a combination of lowcost fr4 substrate and foam. Highgain circularly polarized microstrip patch antenna with loading of shorting pins article in ieee transactions on antennas and propagation 646. Wideband high gain circularly polarized uhf rfid reader. The selfbiased magnetic films are used as a practical means to tune the working frequency of the antenna. The selfbiased magnetic films are used as a practical. High gain circularly polarized microstrip patch antenna with loading of shorting pins article in ieee transactions on antennas and propagation 646. The achievable bandwidth of the proposed antenna obtained is 27% 2. Circularly polarized twodimensional microstrip standing. Circularly polarized microstrip patch antenna 23 3. Circularly polarized microstrip patch antenna for wireless. Therefore, it is difficult to arrange an antenna element at about half wavelength in the case of the above patch antenna.
Correction of measurements in circular polarized antennas. Analysis and design of circular microstrip patch antenna at 5. And a coupling slice instead of a resistive load is used as matching load of the microstrip ring for. The proposed antenna also provides low return loss s11. The patch is designed as a circularly polarized antenna. The four slot diagonally symmetric slotted microstrip antenna had the lowest operating frequency and minimum axial ratio compared to the two slots. The radiation part figure 1b is a square patch of size etched on a square. In this letter, a fourelement high gain circularly polarized microstrip antenna array operating in the kaband is proposed. Achieving 3db axial ratio bandwidth along with the 2. A novel wideband circularly polarized wcp microstrip patch antenna for wireless power transmission wpt at 5. Gain enhancement for circularly polarized microstrip patch antenna. The microstrip antenna design consists of a patch radiator with a dualfeed line in order to produce a circular polarization.
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