Theory, designs and applications payam nayeri, fan yang, atef. The configuration and principles of a reflectarray antenna, and its advantages over other antennas antenna analysis techniques illustrated with photographs, drawings, and tables, this groundbreaking book is an important addition to any electrical engineers library, as well as critical to graduate students focused on antenna engineering and. The unit cells are usually backed by a ground plane, and the incident wave reflects off them towards the direction of the beam. Characterization of loss and bandwidth performance of. It illustrates the advantages of the reflectorreflectarray design in terms of performance and swap. The feeding structure is a simple horn antenna located at the focal point of the reflectarray. Gain and bandwidth characterizations of reflectarray antennas. A wideband horn antenna is also designed as a feed antenna for the proposed reflectarray structure. The authors describe, in detail, design procedures for a wide range of applications, including broadband, multiband, multibeam, contourbeam, beamscanning, and conformal reflectarray antennas. Get doc electromagnetic modeling of reflectarray antennas. A reflectarray antenna consists of a planar or conformal array of elements that are excited with a feed antenna. Review article recent developments of reflectarray antennas for. Table 2 compares several different antenna design approaches. For the validation of this theory, reflectarrays printed above different materials.
Reflectarray antennas download ebook pdf, epub, tuebl, mobi. Click download or read online button to reflectarray antennas book pdf for free now. Design of dualreflectarray antenna for beam scanning. Figure 2 is the picture of the threemeter inflatable reflectarray antenna. Design of a bifocal single reflectarray antenna with. Reflectarray antennas analysis design fabrication and. However, due to their large size, analyzing the performance of these antennas using traditional full wave finitedifference and finiteelement techniques requires considerable computational resources. Microstrip reflectarray antenna for the scanscat radar. Analysis of variable dielectric substrate thickness xband. A low weight, low cost, and easy to fabricate singlelayer dualfrequency reflectarray is designed, fabricated, and measured, with gain values of 27 and 29. Results of a study to determine the feasibility and design limitations of a microstrip reflectarray antenna are presented.
A phase distribution of concentric rings is applied to focus the wavefronts from. Encinar ieee antennas and propagation society, sponsor wileyinterscience a. Osa experimental demonstration of reflectarray antennas. Pdf analysis, design and applications of reflectarrays. It will also appeal to practicing engineers working on antenna development. Chang, design and performance of microstrip reflectarray antenna, ieee transactions on antennas and propagation, vol. The distance travelled by the radiated waves to the noncentered patches is more as compared to the center patch 12. Download pdf reflectarray antennas free online new. In this paper, we present an efficient method to accurately analyze these class of. The reflectarray element is characterized in a unit cell. A wideband reflectarray antenna consisting of single. This paper presents the concept of reflectarray in a novel way, utilizing a graphical visualization tool. A proper cp reflectarray element must highly suppress crosspolarized reflection with respect to the incident cp sense i. The proposed reflectarray is assumed to be composed of square patches on a grounded dielectric slab as shown in.
Gain calculation is a primary step in designing a reflectarray antenna and it is defined as a product of. Reflectarray membrane study for deployable sar antenna core. Resonant elements for tunable reflectarray antenna design, m. Abstractin this work, reflectarray antennas are proposed for their. The cloudsat antenna design is included as a point of reference. The reflectarray is designed for two frequency bands. Reflectarray antenna elements are analyzed by the infinite array theory, whereas a model based on the equivalence principle is applied to calculate the farfield pattern of a reflectarray system. The operating principle of a reflectarray antennasee fig. Recent developments of reflectarray antennas in dual.
Pdf research and development of reflectarray antennas. The proposed antenna is founded on a reflectarray composed of printed elements and excited by the microwave energy in the azimuthally symmetric mode. The text explains both the basic theory of antennas and its application to practical designs. Refleclion loss with variable dielectric substrate thickness where a4 is the change in the reflection phase in o degrees and af is the change in the resonant frequency 0. Integrated solar array and reflectarray antenna or ih. Both dualreflector antenna with a reflectarray subreflector and dualreflectarrays antennas with flat or parabolic main reflectarray are considered. The rf test results of the threemeter antenna demonstrated excellent radiation pattern characteristic. One of the main advantages of reflectarray antennas is the possibility of producing switching. Experimental demonstration of a waveguide reflectarray.
Design of a parabolic reflector and reflectarray antenna. Read electromagnetic modeling of reflectarray antennas online download pdf electromagnetic modeling of reflectarray antennas. Reflectarray antenna has emerged as a new generation. Click download or read online button to get reflectarray antennas book now. A reflectarray antennas bandwidth is limited by two factors. Vhf examples are generally large and resemble a highway billboard, so they are. Approximate analytical technique to design reflectarray antenna. A deployable structure for use in establishing a reflectarray antenna comprising. Design and performance of a microstrip reflectarray antenna ieee. Scanning approaches for reflectarray antennas 304 10. 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. In this dissertation, a general reflectarray system. First, a general analysis technique for these two configurations is described.
Miniaturized microstrip reflectarray antenna design for kuband applications written by namrata v. Description of the microstrip reflectarray when many antenna elements with open or short circuited terminations are arranged in a planar aperture and are illuminated by a feed. Although phasedarray antennas have been accepted as a rather natural fit for such applications, electronically. Design and efficient analysis of large reflectarray antenna. 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. A reflectarray antenna or just reflectarray consists of an array of unit cells, illuminated by a feeding antenna source of electromagnetic waves. Approximate analytical technique to design reflectarray. 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. The present invention provides a high resolution scanning reflectarray antenna hrsra for the purpose of tracking ground terminals and space craft communication applications. In recent years reflectarray antennas have received considerable attention due to their unique capabilities. Design and fabrication of a wideband reflectarray antenna. They provide sufficient coverage of basic reflectarray theory to. Reflectarray antenna has a high gain like parabolic reflectors. This approach greatly facilitates understanding of the working of the reflectarray antenna, and provides an intuitive explanation for the reflectarray behavior.
Millimeterwave singlelayer dualfrequency reflectarray. The operating principle of a reflectarray antenna see fig. Second, results for beam scanning and contouredbeam applications in. Both authors are well respected practitioners who have build these antennas and developed them for space flight. Reflectarrays composed of resonant microstrip gold patches on a dielectric substrate are demonstrated for operation at terahertz frequencies. A class of antennas that utilizes arrays of elementary antennas as reflecting surfaces has been investigated. An enabling technology for nasas dualfrequency ace radar paul e.
Microstrip reflectarray antennas present an alternative to conventional directive antennas in that they are flat, inexpensive, easy to install and. The accurate analysis of electromagneticem scattering from such reconfigurable antenna structures is of great practical. Pdf a brief overview of reflectarray antennas mainly focused on some. Phase delays can be minimized by choice of reflector size and distance between the feed and reflector and by optimizing the phases of signals retransmitted by certain parts of the reflector. Study of different dualreflectarray antenna configurations for beamscanning applications c. But, unlike the reflector, which has infinite bandwidth due to its curved surface, it has a narrow bandwidth due to a planar surface. Design and analysis of high performance reflectarray resonant.
General near field synthesis of reflectarray antennas for. Design of a parabolic reflector and reflectarray antenna for xband. Generally, radar and imaging systems call for antennas with large apertures and fast beamscanning capabilities. The required phase distribution on the surface of the reflectarray is. To fulfill the dualfrequency requirements, elements are needed to resonate at two different, independently adjustably frequencies.
An xband highpower microwave antenna with arbitrarily elliptical polarization is proposed and investigated in this paper. 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. This chapter explores the basics of designing the phase distribution on the reflectarray aperture. Reconfigurable reflectarray antenna boasts 25,600 elements. Based on the relation between the patch size and the reflection phase, a progressive phase distribution is implemented on the patch array to create a reflector able to deflect an incident beam towards a predefined angle off the specular direction.
This site is like a library, use search box in the widget to get ebook that you want. Basic theory of reflectarray antenna the proposed reflectarray is assumed to be composed of square patches on a grounded dielectric slab as shown in fig. Abstract in this paper a reflectarray design for a membrane spaceborne antenna to be used in a typical sar mission is presented. Miniaturized microstrip reflectarray antenna design for ku. Holzeriplaw, pc dba holzer patel drennan 216 16th street suite 50, denver, co, 80202, us. In this study, a single layer reflectarray antenna is proposed with variable patch sized unit cells and suggested for enhancing the bandwidth with small overall dimensions for x. Download reflectarray antennas ebook pdf or read online books in pdf, epub, and mobi format. 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. Xband reflectarray antenna with arbitrarily elliptical. A major drawback of reflectarray antennas is that phase compensation needs to be done for the noncentered patches. Finally, the reflectarray antenna is fabricated and tested.
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