[仿真]Growing Evanescent Waves in Continuous

Abstract—We demonstrate the growth of evanescent waves in a tp%|AD"  
backward-wave medium which consists of a printed continuous {>wI8  
transmission-line (TL) grid without any embedded lumped elements '/ihL^^@L  
(chip or printed) or vias. This proposed medium is referred El'yiJ  
to as a backward-wave transmission-line (BWTL) grid. When i3D<`\;r  
such a BWTL medium is sandwiched between two complementary *}>Bkq9h  
forward-wave transmission-line (FWTL) grids, growing o>@=N2n  
evanescent waves are supported in the BWTL medium. Analysis Q! Kn|mnN  
and microwave simulations verify the growth of evanescent w2 /* `YO  
waves including in the realistic case of lossy TLs. The proposed F%9cS :  
BWTL medium is easy to construct and inherently scalable with >6OCKl  
frequency. #FEa 5  
Index Terms—Backward waves, evanescent wav .. xLe =d|6  
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