The configuration and principles of a reflectarray antenna, and its advantages over other antennas. Available formats pdf please select a format to send. Pdf analysis, design and applications of reflectarrays. Reradiation waves for designed reflectarray with pro posed formula. Cooley, richard park, peter stenger northrop grumman electronic systems nges baltimore, md usa. Therefore, a ringshaped compact microstrip reflectarray with microstrip antenna feed has been proposed. A microstrip reflectarray antenna element, in proceedings of the antenna applications symposium. 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. This site is like a library, use search box in the widget to get ebook that you want. Vhf examples are generally large and resemble a highway billboard, so they are. Reflectarray antennas download ebook pdf, epub, tuebl, mobi.
Reflectarray antennas are most commonly used in far field. Reflect array antennas pdf passive and reconfigurable reflectarray antennas, mostly for space applications. 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. The printed reflectarray antenna or flat reflector consists of a very thin, flat. Improvement in reflectarray antenna bandwidth with changing. The unit cells are usually backed by a ground plane, and the incident wave reflects off them towards the direction of. Click download or read online button to get reflectarray antennas book now. It will also appeal to practicing engineers working on antenna development. Design of dualreflectarray antenna for beam scanning. Microstrip reflectarray antenna for the scanscat radar.
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. A major drawback of reflectarray antennas is that phase compensation needs to be done for the noncentered patches. Gain and bandwidth characterizations of reflectarray antennas. 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. The authors claim that satcom is a potential application of this antenna but they do not propose any particular application. Now, written by two experts in the field, reflectarray antennas offers complete coverage of this important, timely subject. Ring shaped compact microstrip reflectarray antenna. The operating principle of a reflectarray antennasee fig. 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. 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. Electromagnetic modeling of reflectarrays using scale changing. 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. For large apertures 2 m or larger, the antennas reflecting surface, being flat, can be more easily and reliably deployed than a curved parabolic.
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. Design and demonstration of an electronically scanned reflectarray antenna at 100 ghz using multiresonant cells based on liquid crystals gerardo perezpalomino, mariano barba, jose. A novel reflectorreflectarray antenna an enabling technology for nasas dualfrequency ace radar paul e. The proposed reflectarray antenna concave approximately has 25% 3db bandwidth which shows an increment in bandwidth about 18% compared to flat reflectarray antenna.
Examples of reflector, microstrip array and 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. A reflectarray antenna consists mainly of a planar array of microstrip patches on a suitable dielectric substrate. Reflectarray antennas john huang, jose antonio encinar. A proper cp reflectarray element must highly suppress crosspolarized reflection with respect to the incident cp sense i. A new kuband reflectarray with an artificial anisotropic slab that consists of periodic holes, backed by a planar artificial magnetic conductor amc is proposed. 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.
The operating principle of a reflectarray antenna see fig. System performance is often limited by the available antennas, whether the system is a radar or communications network. Increasing of reflectarray antenna bandwidth, nonflat reflectarray antenna. 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. Pdf research and development of reflectarray antennas. Under these late criteria, reflectarray antennas can be classified in two main subgroups. 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. Radiation analysis and characteristics of conformal reflectarray antennas. This paper presents the concept of reflectarray in a novel way, utilizing a graphical visualization tool. The authors describe, in detail, design procedures for a wide range of applications, including broadband, multiband, multibeam, contourbeam, beamscanning, and conformal reflectarray antennas. A class of antennas that utilizes arrays of elementary antennas as reflecting surfaces has been investigated.
General near field synthesis of reflectarray antennas for. Reflection area of resonant elements at 10ghz 64 ii. 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. Reflectarray antenna has a high gain like parabolic reflectors. A powerful tool to automatically design reflectarray antennas has been presented. Experimental demonstration of a waveguide reflectarray. Implementation of an innovative method to design reflectarray. Kennedy, the reflectarray antenna, in ieee transactions on antennas and propagation, vol. 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. 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. This antenna, which has been proposed as a means to provide potential lowcost corporatefed phased arrays, utilizes microwave integrated circuit techniques to integrate the radiating element, phaseshifter components, dc distribution, and logic circuitry into a single. Jose a encinar is with the electromagnetism and circuit theory. Analysis of dualreflector antennas with a reflectarray as. Gain calculation is a primary step in designing a reflectarray antenna and it is defined as a product of.
In this chapter, the operating principles of reflectarray antennas will first be. Integrated solar array and reflectarray antenna isara. Theory and formulation of scale changing technique. In a beam fixed reflectarray, the beam forming is implemented by properly adjusting the dimensions at each element, and cannot be modified. The unitcell of the reflectarray is a twolayered structure that consists of a dielectric with a hole on a grounded patch. Encinar, robert cahill, raymond dickie, paul baine and michael bain abstractthe design, fabrication and measured results are.
They are often used in the vhf and uhf frequency bands. Long reading range for the frequency coded chipless rfid. Reflectarray antenna design with arbitrary incident. The reflectarray is a novel type of highgain antennas, which combines some of favorable features of reflectors and arrays. Reflector antennas national radio astronomy observatory. The text explains both the basic theory of antennas and its application to practical designs. The wave is incident from plane i and the incident, scattered. 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. In a prototype of the dualband reflectarray antenna see figure, the 7. In this configuration, the feed horn is embedded in. Racette, gerald heymsfield, lihua li nasa goddard space flight center gsfc greenbelt, md usa michael e.
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. Array theory approach versus aperture field approach payam nayeri, fan yang, and atef z. This work and the related pdf file are licensed under a creative commons attribution 4. Lau jy, hum sv 2010 a planar reconfigurable aperture with lens and reflectarray modes of operation. A dualreflectarray antenna in folded configuration was pro posed in 16.
Pdf a brief overview of reflectarray antennas mainly focused on some efficient analysis and design techniques and on recent developments has been. Reflectarray antennas wiley online books wiley online library. Results of a study to determine the feasibility and design limitations of a microstrip reflectarray antenna are presented. In section 3, we apply this approach to calculate the radiation pattern of the proposed antenna. Improvement in reflectarray antenna bandwidth with. Recent developments of reflectarray antennas in dualreflector configurations. It is well known that when a required antenna gain is given at a particular frequency, the antenna aperture size is more or less. 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. 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. 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. Also, for large apertures, a reflectarray in flat panels can be easier to. A reflectarray antenna or just reflectarray consists of an array of unit cells, illuminated by a feeding antenna source of electromagnetic waves.
A metallicrectangulargrooves based reflectarray fed by a pyramidal horn antenna was fabricated and measured with nearfield scanning, thus resulting in 42. 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. Integrated solar array and reflectarray antenna or i anwit esats. Study of different dualreflectarray antenna configurations for beamscanning applications c. Click download or read online button to get reflectarray antennas analysis design fabrication and measurement book now. Integrated solar array and reflectarray antenna or i anwit. Design considerations of broadbeam microstrip reflectarray and experimental results are described in. The unit cells are usually backed by a ground plane, and the incident wave reflects off them towards the direction of the beam. Aditionally, ticra offers software designed for satellite coverage planning. Guo department of physics xinjiang kashi teachers college kashi 844000, china. In this dissertation, a general reflectarray system model is characterized by a group of configuration parameters, whose. 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.
Then, the phase distribution and radiation pattern of the antenna are examined. New kuband reflectarray antenna by using anisotropic. Shao institute of applied physics university of electronic science and technology of china chengdu 610054, china l. Other readers will always be interested in your opinion of the books youve read.
Reflectarray antennas are the new generation of traditional parabolic. Reflectarray antennas analysis, design, fabrication, and. The reflectarray element is characterized in a unit cell. Home ticra reflector antenna and em modeling software. Configuration of reflectarray antenna in 2d and 3d view 1.
Optimum design of broadbeam microstrip reflectarray. An intuitive explanation of reflection phase behavior harish rajagopalan and yahya rahmatsamii. Abstractin this paper, a graphenebased reflectarray antenna. Plasma reflectarraytransmitarray antennas using a single. The distance travelled by the radiated waves to the noncentered patches is more as compared to the center patch 12. Reflectarray antennas analysis design fabrication and. This approach greatly facilitates understanding of the working of the reflectarray antenna, and provides an intuitive explanation for the reflectarray behavior. However, over the past two decades the reflectarray antenna 1,2 has emerged as an alternative. A reflectarray antenna represents an alternative to conventional reflector antennas and can provide high gain, but is typically limited in bandwidth. 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. Radiation pattern of the antenna are shown in figure 9 and figure 10. Analysis of design optimization of bandwidth and loss performance of reflectarray antennas based on material properties.
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