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In this paper, a long slot antenna of conical radiation beam is presented, which is based on the substrate integrated waveguide (SIW). The antenna consists of a pair of tapered long slots etched out of both the top and bottom broad walls of a substrate integrated waveguide to produce the conical radiation beam. Experiment results of the fabricated antenna show that the realized beam-pointing angle...
We analyze the gain flatness of Raman amplifiers using equally spaced pumps. We show that using an optimized central pump wavelength with equal pump spacing provides ample gain flatness and may simplify system design.
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