منابع مشابه
Ultra Thin Deployable Reflector Antennas
We have recently proposed a new concept for deployable reflectors consisting of a thin parabolic carbon-fibre-reinforced-plastic (CFRP) shell stiffened along the edge by an elastically collapsible stiffener. Here we show that a stiffener accounting for less than 10% of the total mass of the reflector increases the stiffness of the softest deformation mode of the deployed reflector by 48 times, ...
متن کاملcalibration of phased array of reflector antennas using leo satellites
detection of stealth targets calls for employment of high-power radars which itself relies on usage of high-gain antennas like large parabolic reflectors. in the past few years, using of an array with many small reflectors instead of a large reflector antenna has been considered. this method provides enhanced eirp by a factor of n2 where n is the number of array antennas. regarding improvement ...
متن کاملOn the regularity of reflector antennas
where ν is the outer normal to A at the point where the light ray hits A. Suppose that we have a light source located at O, and Ω,Ω∗ are two domains in the sphere Sn−1, f(x) is a positive function for x ∈ Ω (input illumination intensity), and g(x∗) is a positive function for x∗ ∈ Ω∗ (output illumination intensity). If light emanates from O with intensity f(x) for x ∈ Ω, the far field reflector ...
متن کاملDistorted Reflector Antennas: Radiation Pattern Sensitivity to the Surface Distortions
The high-frequency performance of the reflector antennas is mainly limited by the surface. It has been shown that distortions on different regions of the reflector surface can have different effects on the radiation performance. In other words, degradation of the radiation pattern due to the presence of surface distortions is sensitive to the location and behavior of the surface distortion prof...
متن کاملThe Radiation Pattern of Reflector Impulse Radiating Antennas: Early-Time Response
We generate here an approximation to the step response of reflector Impulse Radiating Antennas (IRAs) in the Eand H-planes. These step responses are then convolved with the derivative of the driving voltage to find the radiated fields. This allows a determination of the radiation pattern of reflector IRAs. < L Introduction The transient radiation from a planar aperture field distribution was de...
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ژورنال
عنوان ژورنال: IEEE Transactions on Electromagnetic Compatibility
سال: 1986
ISSN: 0018-9375
DOI: 10.1109/temc.1986.4307253