Applied Optics · 1974 · 121 citations · 6 references
EngineeringElectrical EngineeringPhysicsAntennasOpticsPhotonicsAntenna DesignAntenna GainAntenna RadiationAntenna Radiation PatternsOptical SourcesPhysical OpticsAntenna ApertureAperture SizeGainGain PatternGain Pattern AnalysisMaximum GainObscuration EffectsOptical Gain
The study analyzes the gain of centrally obscured optical transmitting antennas. The authors model a circular, TEM00‑illuminated antenna, derive a polynomial to match the source distribution for maximum on‑axis gain, and use the resulting gain curves to generate design charts illustrating losses from pointing errors and beam cone angle as functions of aperture size and central obscuration. The resulting graphs enable rapid, accurate evaluation of antenna gain for use in the conventional range equation.
The gain of centrally obscured optical transmitting antennas is analyzed in detail. The calculations, resulting in near- and far-field antenna gain patterns, assume a circular antenna illuminated by a laser operating in the TEM(00) mode. A simple polynomial equation is derived for matching the incident source distribution to a general antenna configuration for maximum on-axis gain. An interpretation of the resultant gain curves allows a number of auxiliary design curves to be drawn that display the losses in antenna gain due to pointing errors and the cone angle of the beam in the far field as a function of antenna aperture size and its central obscuration. The results are presented in a series of graphs that allow the rapid and accurate evaluation of the antenna gain which may then be substituted into the conventional range equation.
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The radiation pattern of a truncated Gaussian aperture distribution
Arden L. Buck · Proceedings of the IEEE · 1967 · 34 citations
Natural Sciences, Physics, Optics +12