A waveguide element is capable of realizing acute waveguide discontinuity, such as a right angle bending, (L-shaped bending) or branching (T-shaped branching). Two single mode waveguides having the identical cross-sectional structure form a waveguide discontinuity where center axes thereof extending in the longitudinal direction intersect with each other at an angle .theta. (0<.theta.<90.degree.). A leaky wave propagation region in a form of a quadrilateral shape having a length of one edge of L is located in the vicinity of a point where the center axes extended in the longitudinal directions of respective incident side and side single mode waveguides, with an effective propagation wavelength of a dominant mode there of to be cos(.theta./2) times of an effective propagation wavelength .lambda.G. Thus, an energy of the wave launched from an incident end of the single mode waveguide can be efficiently taken out from a end of the single mode waveguide.

Een golfgeleiderelement kan scherpe golfgeleiderdiscontinuïteit, zoals een, (het L-vormige buigen) buigt of rechte hoek realiseren die (hetVormige vertakken zich) vertakt zich. Twee enige wijzegolfgeleiders die de identieke structuur hebben in dwarsdoorsnede vormen een golfgeleiderdiscontinuïteit waar het centrum daarvan het uitbreiden in de longitudinale richting snijdt met elkaar bij een hoek theta. afschaft zich (0

 
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