نتایج جستجو برای: linear arrays
تعداد نتایج: 530273 فیلتر نتایج به سال:
In this paper, the properties, structures and translation equivalence relations of linear recurring m-arrays are systematically studied. The number of linear recurring m-arrays is given. 1. Intrduction Reed and Steward [ll], Spann [5] and [2] have studied the arrays of so-called perfact maps. This has ied I IO research on various types of window properties for arrays(see [2]-[11]). In this pape...
The concept of connected (or coupled) dipoles in a linear array, which improves wideband performance, is examined. A long wire with multiple feeds is the model, using rigorous moment method analysis. Edge waves of current appear not to be attenuated; around half-wave dipole length the current peaks are one wavelength apart, with deep nulls. For dipole lengths around quarter-wave the current pea...
This paper presents a methodology for mapping linear processor arrays onto FPGA components. By taking advantage of regularity and locality properties of these structures, a placement is pre-deened, allowing vendor tools to skip this phase and produce fast and optimized routing. 1 Introduction In many compute intensive applications such as image or signal processing, time is mostly spent in exec...
This paper describes the theories and techniques for designing linear and planar fractal arrays and compare their radiation pattern with conventional arrays. Fractals are recursively generated object having fractional dimension. We have compared radiation pattern of cantor linear arrays with conventional linear arrays using MATLAB program. Another program was developed to characterize the radia...
Nonuniform Phased Sampling method is proposed to phase-only synthesize the power pattern of both linear and planar antenna arrays. This method modifies the conventional sampling method which is used for amplitude-phase synthesis. This method is based on assigning suitable phases to the sampling points of radiation pattern in order to reach desired amplitude of currents. Some examples are given ...
In this paper novel reflectarray antenna elements are proposed using aperture-coupled dielectric resonator antenna structures. Using these new structures, wide phase range and wide frequency bandwidth (up to 28.5%) with parallel and linear phase curves are obtained. In each case, an array consisting of 289 elements was simulated using the finite integration technique (FIT). The arrays exhibit 3...
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