New kuband reflectarray antenna by using anisotropic. Increasing of reflectarray antenna bandwidth, nonflat reflectarray antenna. Examples of reflector, microstrip array and reflectarray antennas. An accurate design of a reflectarray antenna requires into account the mutual coupling taking between the patches of the array, as well as the impact of the impinging wave at each element, which can be locally considered as a plane wave with an associated angle of incidence 2.
Reflectarray antennas download ebook pdf, epub, tuebl, mobi. A novel reflectorreflectarray antenna an enabling technology for nasas dualfrequency ace radar paul e. Analysis of design optimization of bandwidth and loss performance of reflectarray antennas based on material properties. Configuration of reflectarray antenna in 2d and 3d view 1. In this configuration, the feed horn is embedded in. A waveguide array type was presented in to validate the reflectarray principle, but the real interest in this new kind of antenna came in the late 1980s 24, when lowprofile reflectarrays were introduced. The reflectarray concept was firstly introduced in 1963 to define a new class of antennas combining the performance versatility of arrays with the simplicity of reflectors. In section 3, we apply this approach to calculate the radiation pattern of the proposed antenna. Gain and bandwidth characterizations of reflectarray antennas. Other readers will always be interested in your opinion of the books youve read. Home ticra reflector antenna and em modeling software. A reflectarray antenna consists mainly of a planar array of microstrip patches on a suitable dielectric substrate. Aditionally, ticra offers software designed for satellite coverage planning. Microstrip reflectarray antenna for the scanscat radar.
An intuitive explanation of reflection phase behavior harish rajagopalan and yahya rahmatsamii. Whether youve loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. They are often used in the vhf and uhf frequency bands. Click download or read online button to get reflectarray antennas analysis design fabrication and measurement book now. A reflectarray antenna represents an alternative to conventional reflector antennas and can provide high gain, but is typically limited in bandwidth. Guo department of physics xinjiang kashi teachers college kashi 844000, china.
Therefore, a ringshaped compact microstrip reflectarray with microstrip antenna feed has been proposed. Study of different dualreflectarray antenna configurations for beamscanning applications c. However, over the past two decades the reflectarray antenna 1,2 has emerged as an alternative. This paper presents the concept of reflectarray in a novel way, utilizing a graphical visualization tool. Reflectarray antennas analysis design fabrication and. Theory and formulation of scale changing technique. Plasma reflectarraytransmitarray antennas using a single. Reflectarray antennas are most commonly used in far field. The proposed reflectarray antenna concave approximately has 25% 3db bandwidth which shows an increment in bandwidth about 18% compared to flat reflectarray antenna. Pdf analysis, design and applications of reflectarrays. Abstract a brief overview of reflectarray antennas mainly focused on some. For large apertures 2 m or larger, the antennas reflecting surface, being flat, can be more easily and reliably deployed than a curved parabolic. The authors describe, in detail, design procedures for a wide range of applications, including broadband, multiband, multibeam, contourbeam, beamscanning, and conformal reflectarray antennas.
Kennedy, the reflectarray antenna, in ieee transactions on antennas and propagation, vol. Gain calculation is a primary step in designing a reflectarray antenna and it is defined as a product of. Design and demonstration of an electronically scanned. Improvement in reflectarray antenna bandwidth with. Recent developments of reflectarray antennas in dualreflector configurations. A major drawback of reflectarray antennas is that phase compensation needs to be done for the noncentered patches. Lau jy, hum sv 2010 a planar reconfigurable aperture with lens and reflectarray modes of operation. 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.
Radiation pattern and bandwidth of non flat reflectarray a horn antenna is used as feed in which the phase center distance from the reflectarray plane is 5 mm. Paraboloidal reflector antennas and constrainedfed planar array antennas were for a long time the only options available to the designer to achieve such performance. 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 distance travelled by the radiated waves to the noncentered patches is more as compared to the center patch 12. Integrated solar array and reflectarray antenna or i anwit. Reflectarray antenna design with arbitrary incident. General near field synthesis of reflectarray antennas for.
Ring shaped compact microstrip reflectarray antenna. 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. But, unlike the reflector, which has infinite bandwidth due to its curved surface, it has a narrow bandwidth due to a planar surface. In a prototype of the dualband reflectarray antenna see figure, the 7. Reflectarray antennas analysis, design, fabrication, and.
The unit cells are usually backed by a ground plane, and the incident wave reflects off them towards the direction of. The operating principle of a reflectarray antenna see fig. Reflection area of resonant elements at 10ghz 64 ii. A dualreflectarray antenna in folded configuration was pro posed in 16.
The authors claim that satcom is a potential application of this antenna but they do not propose any particular application. The configuration and principles of a reflectarray antenna, and its advantages over other antennas. System performance is often limited by the available antennas, whether the system is a radar or communications network. Beginning with an introduction to reflectarray antennas and an extensive overview of its history, the book goes on to explore. New kuband reflectarray antenna by using anisotropic superstrate on an artificial magnetic conductor volume 9 issue 4 mahmood rafaeibooket, zahra atlasbaf. Mar 14, 2007 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. Improvement in reflectarray antenna bandwidth with changing. Pdf research and development of reflectarray antennas. Reflectarray antenna has a high gain like parabolic reflectors. Analysis of dualreflector antennas with a reflectarray as. Electromagnetic modeling of reflectarrays using scale changing. A proper cp reflectarray element must highly suppress crosspolarized reflection with respect to the incident cp sense i.
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 powerful tool to automatically design reflectarray antennas has been presented. Reflector antennas national radio astronomy observatory. The reflectarray element is characterized in a unit cell. Reflectarray antennas wiley online books wiley online library. In this chapter, the operating principles of reflectarray antennas will first be. Available formats pdf please select a format to send. The unitcell of the reflectarray is a twolayered structure that consists of a dielectric with a hole on a grounded patch. This site is like a library, use search box in the widget to get ebook that you want. 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. Cooley, richard park, peter stenger northrop grumman electronic systems nges baltimore, md usa.
It will also appeal to practicing engineers working on antenna development. Optimum design of broadbeam microstrip reflectarray. Integrated solar array and reflectarray antenna for igh andwidth cubesats 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. Design considerations of broadbeam microstrip reflectarray and experimental results are described in. Array theory approach versus aperture field approach payam nayeri, fan yang, and atef z. Reflect array antennas pdf passive and reconfigurable reflectarray antennas, mostly for space applications. A microstrip reflectarray antenna element, in proceedings of the antenna applications symposium. Now, written by two experts in the field, reflectarray antennas offers complete coverage of this important, timely subject. The operating principle of a reflectarray antennasee fig. For large apertures 2 m or larger, the antenna s reflecting surface, being flat, can be more easily and reliably deployed than a curved parabolic. Reradiation waves for designed reflectarray with pro posed formula.
Radiation analysis and characteristics of conformal reflectarray antennas. The printed reflectarray antenna or flat reflector consists of a very thin, flat. Implementation of an innovative method to design reflectarray. 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. Furthermore, it will allow the reader to become more familiar with this relatively new type of antenna and will provide valuable support in designing these antennas. Click download or read online button to get reflectarray antennas book now. Integrated solar array and reflectarray antenna isara. Long reading range for the frequency coded chipless rfid. The unit cells are usually backed by a ground plane, and the incident wave reflects off them towards the direction of the beam. A reflectarray antenna or just reflectarray consists of an array of unit cells, illuminated by a feeding antenna source of electromagnetic waves.
Under these late criteria, reflectarray antennas can be classified in two main subgroups. Reflectarray antennas john huang, jose antonio encinar. In a beam fixed reflectarray, the beam forming is implemented by properly adjusting the dimensions at each element, and cannot be modified. The reflectarray antenna takes advantages of both the reflector antenna and the array antenna, by spatially illuminating an array of phased antenna elements distributed on a planar surface. Racette, gerald heymsfield, lihua li nasa goddard space flight center gsfc greenbelt, md usa michael e. Jose a encinar is with the electromagnetism and circuit theory. 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. Reflectarray antennas are the new generation of traditional parabolic. Integrated solar array and reflectarray antenna or i anwit esats.
A metallicrectangulargrooves based reflectarray fed by a pyramidal horn antenna was fabricated and measured with nearfield scanning, thus resulting in 42. In this dissertation, a general reflectarray system model is characterized by a group of configuration parameters, whose. Encinar, robert cahill, raymond dickie, paul baine and michael bain abstractthe design, fabrication and measured results are. Shao institute of applied physics university of electronic science and technology of china chengdu 610054, china l. Radiation pattern of the antenna are shown in figure 9 and figure 10. A new kuband reflectarray with an artificial anisotropic slab that consists of periodic holes, backed by a planar artificial magnetic conductor amc is proposed. Kraus this text is for the course on antennas offered to the seniorgraduate level by most electrical engineering departments. This work proposes the utilization of a high gain and pencil beam reflectarray ra antenna at the reader of the frequency coded fc chipless radiofrequency identification rfid system to minimize the environmental reflections and increase the reading range. It is well known that when a required antenna gain is given at a particular frequency, the antenna aperture size is more or less. Results of a study to determine the feasibility and design limitations of a microstrip reflectarray antenna are presented.
Ticra is the worlds leading supplier of reflector antenna and em modeling software for antenna industries, including spacecraft manufacturers and space agencies, earthstation antenna suppliers, defence industries and research institutions. Also, for large apertures, a reflectarray in flat panels can be easier to. The text explains both the basic theory of antennas and its application to practical designs. The reflectarray is a novel type of highgain antennas, which combines some of favorable features of reflectors and arrays.
The reported technique is able to generate the geometrical model of the antenna considering some input parameters, such as, the unit cell type, the operating frequency, the focal length, the periodicity, and the desired main beam radiating direction. This approach greatly facilitates understanding of the working of the reflectarray antenna, and provides an intuitive explanation for the reflectarray behavior. Experimental demonstration of a waveguide reflectarray. A microstrip reflectarray is a flat reflector antenna that can be mounted conformally onto a spacecrafts outside structure without consuming a significant amount of spacecraft volume and mass. 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. A class of antennas that utilizes arrays of elementary antennas as reflecting surfaces has been investigated. Pdf a brief overview of reflectarray antennas mainly focused on some efficient analysis and design techniques and on recent developments has been. Vhf examples are generally large and resemble a highway billboard, so they are.
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