According to the standard, other accepted synonyms for this kind of antenna are. Encinar, robert cahill, raymond dickie, paul baine and michael bain abstractthe design, fabrication and measured results are. Integrated solar array and reflectarray antenna or i anwit esats increasing cubesat downlink data rates to 100 mbps the integrated solar array and reflectarray antenna isara mission will demonstrate a reflectarray antenna that increases downlink data rates for cubesats from the existing baseline rate of 9. Analysis, design, fabrication, and measurement artech house antennas and propagation jafar shaker, mohammad reza chaharmir, jonathan ethier on.
Integrated solar array and reflectarray antenna for high bandwidth cubesats. Reflectarray antenna with radar crosssection reduction. Deployable reflectarray antenna structure mma design, llc. In general, reflectarray is composed of a planar reflector and a primary source 4, i. Plasma reflectarraytransmitarray antennas using a single. Now, written by two experts in the field, reflectarray antennas offers complete coverage of this important, timely subject. Guo department of physics xinjiang kashi teachers college kashi 844000, china. Study of different dual reflectarray antenna configurations for beamscanning applications c. An intuitive explanation of reflection phase behavior harish rajagopalan and yahya rahmatsamii. Conclusion a 94ghz monopulse folded reflectarray antenna has been designed and high antenna gain has been realized. Integrated solar array and reflectarray antenna or i anwit esats. Romanofsky national aeronautics and space administration glenn research center cleveland, ohio 445 abstract though there are a few examples of scanning phased array. Phase characteristics of subwavelength antenna elements.
Arrebola3 1 german aeroespace center dlr, microwave and radar institute, oberpfaffenhofen, germany. The antenna configuration presents the simplicity of being implemented with two flat reflectarrays, it provides a compact optics and it can be easily folded and deployed. The main reflectarray emulates a parabolic reflector and the beam scanning is achieved by introducing a phasecontrol into the elements of the subreflectarray. Study of different dualreflectarray antenna configurations. This paper presents the concept of reflectarray in a novel way, utilizing a graphical visualization tool. Racette, gerald heymsfield, lihua li nasa goddard space flight center gsfc greenbelt, md usa michael e. A dualband reflectarray for x and kabands jpl kaband reflectarray design uses variable size patches to generate proper reflection phase patch size determined from scurve calculated using method of moments software developed by d. However, these used primary sources always have bulk sizes, and a transition between the antenna and planar circuits is. The main reflectarray emulates a parabolic reflector and the beam scanning is achieved by introducing a phasecontrol into the elements of the sub reflectarray. The reflectarray is a novel type of highgain antennas, which combines some of favorable features of reflectors and arrays. Can anybody please tell me how can i simulate reflectarray using grasp ticra. Wideband reflectarray using compact coupled element and. It consists of a spacefeeding primary source and an array of reflecting elements with individually predesigned phases to collimate or shape the highgain beam in the desired direction. Also, for large apertures, a reflectarray in flat panels can be easier to.
Analysis and synthesis techniques a special issue journal published by hindawi reflectarrays have received great attention in recent years due to their capabilities to provide large aperture solutions with simple feeding mechanism. Pdf a wideband reflectarray antenna based on organic. One major hurdle in the designing of reflectarrays is the compensation of phase difference between various elements. An antenna consisting of a feed and an array of reflecting elements arranged on a surface and adjusted so that the reflected waves from the individual elements combine to produce a prescribed secondary radiation pattern. This approach greatly facilitates understanding of the working of the reflectarray antenna, and provides an intuitive explanation for the reflectarray behavior.
Phase characterization of reconfigurable reflectarray antennas. But, unlike the reflector, which has infinite bandwidth due to its curved surface, it has a narrow bandwidth due to a planar surface. Romanofsky national aeronautics and space administration glenn research center cleveland, ohio 445 abstract though there are a. Paraboloidal reflector antennas and constrainedfed planar array antennas were for a long time the only options available to the designer to achieve such performance. A major drawback of reflectarray antennas is that phase compensation needs to be done for the noncentered patches. However, over the past two decades the reflectarray antenna 1,2 has emerged as an alternative. A high efficiency reflectarray antenna design based on. Integrated solar array and reflectarray antenna or i anwit esats increasing cubesat downlink data rates to 100 mbps the integrated solar array and reflectarray antenna isara mission will demonstrate a reflectarray antenna that increases downlink data rates for. Cooley, richard park, peter stenger northrop grumman electronic systems nges baltimore, md usa. Design and development of an inflatable reflectarray antenna.
It was first created to replace the parabolic reflector antenna. They are often used in the vhf and uhf frequency bands. The reflectarray element is characterized in a unit cell. It is well known that when a required antenna gain is given at a particular frequency, the antenna aperture size is more or less.
Integration design of high efficiency reflectarray and. Gain and bandwidth characterizations of reflectarray antennas. Pdf reflectarray antennas printed on convex surface. Reflector antennas national radio astronomy observatory. Reflectarray antennas have attracted special attention for implementing high gain antennas as they combine some advantages of phased arrays and reflectors, such aslow losses, ease of manufacture in flat panels, low cross polarization and the possibility of an electronic control the beam. Since the monopulse comparator is made by a waveguide, the antenna also endures to highpower.
Phase characteristics of subwavelength antenna elements for. Reflectarray antenna has a high gain like parabolic reflectors. Printed reflectarrays combine certain advantages of reflector antennas and phased arrays. Design and demonstration of an electronically scanned. A proper cp reflectarray element must highly suppress crosspolarized reflection with respect to the incident cp sense i. Hello friends, i am working on reflectarray antenna. Study of different dualreflectarray antenna configurations for beamscanning applications c. Design of dualreflectarray antenna for beam scanning ning performance, a phase is introduced into the sub reflectarray to emulate the optics corresponding to different virtual foci, associated to each beam direction, as own in.
Nixonb asubmillimeterwave technology laboratory, university of massachusetts lowell, lowell, ma, usa 01854. Finally, a very special acknowledgement is due to the guest editors and colleagues, raphael gillard and manuel arrebola, for their precious cooperation, and to the editorial board of the international journal of antennas and propagation, who has made possible the publication of this special issue. Antennas and propagation slide 3 chapter 4 5 antenna arrays 2 diversity redundant signals on multiple antennas reduce effects due to channel fading spatial multiplexing mimo. A reflectarray antenna is the array antenna system that consists of a reflective aperture and feed antenna. A microstrip reflectarray antenna element, in proceedings of the antenna applications symposium. A deployable reflectarray antenna structure comprising. Example 2 let us now consider a reflectarray antenna with its reflector parameters unchanged from example 1, but with a feed pattern described by q e q h 3, which means that its 3db beamwidths are. The authors describe, in detail, design procedures for a wide range of applications, including broadband, multiband, multibeam, contourbeam, beamscanning, and conformal reflectarray antennas. Reconfigurable reflectarray design using slots embedded patch elements. Describes the configuration and principles of a reflectarray antenna, its advantages over other antennas, the history of its development. Microstrip reflectarray antenna for the scanscat radar. Configuration of reflectarray antenna in 2d and 3d view 1.
Scribd is the worlds largest social reading and publishing site. Design and demonstration of an electronically scanned reflectarray antenna at 100 ghz using multiresonant cells based on liquid crystals gerardo perezpalomino, mariano barba, jose. The suggested antenna is marked by its easy manufacture and small depth. A reflectarray is a relatively new type of antenna fabricated from standard printed circuit boards with an array of square copper patches etched on them. Reflectarray antennas ras have the ability to combine the advantages of both traditional parabolic reflector and phased array antennas without the need for feed network designs. In telecommunications and radar, a reflective array antenna is a class of directive antennas in which multiple driven elements are mounted in front of a flat surface designed to reflect the radio waves in a desired direction. A novel reflectorreflectarray antenna an enabling technology for nasas dualfrequency ace radar paul e. Index termsreflectarray, linear polarization, high efficiency, 3db bandwidth, incident field. Based on the resultsshown in figure 3, it can be concluded that the dielectric anisotropy is directly proportional to the dynamic phase range and frequency tunability of reflectarray antenna. This conception was first proposed in 1960s 1, waveguides with different lengths were used to provide different phase. Gain calculation is a primary step in designing a reflectarray antenna and it is defined as a product of. Beginning with an introduction to reflectarray antennas and an extensive overview of its history, the book goes on to explore.
Design of dualreflectarray antenna for beam scanning. Advances in scanning reflectarray antennas based on. Phase characteristics of subwavelength antenna elements for efficient design of terahertz frequency and millimeter wave metasurfaces richard j. The distance travelled by the radiated waves to the noncentered patches is more as compared to the center patch 12. The configuration and principles of a reflectarray antenna, and its advantages over other antennas. Advances in scanning reflectarray antennas based on ferroelectric thin film phase shifters for deep space communications robert r.
The wave is incident from plane i and the incident, scattered. Reflect array antennas pdf passive and reconfigurable reflectarray antennas, mostly for space applications. Since arrays of dipoles are impractical at wavelengths o m or so, most. Once the antenna geometry is defined, the phase shift distribution to be implemented on the reflectarray is obtained at a given working frequency. Lau jy, hum sv 2010 a planar reconfigurable aperture with lens and reflectarray modes of operation. Ipn progress report 42149 may 15, 2002 design and development of an in. Reflectarray antennas john huang, jose antonio encinar. The patches collimate divergent rays from a small feed antenna into a focused beam, behaving much like a parabolic reflector. Reflector antennas paraboloidal reflectors antennas useful for radio astronomy at short wavelengths must have collecting areas much larger than the collecting area o4u of an isotropic antenna and much higher angular resolution than a short dipole provides. An enabling technology for nasas dualfrequency ace radar paul e. Shao institute of applied physics university of electronic science and technology of china chengdu 610054, china l. Describes the configuration and principles of a reflectarray antenna, its advantages over other antennas, the history of its development, analysis techniques, practical design procedures, bandwidth issues and wideband techniques, as well as applications and recent developments.
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