Radio wave propagation in presence of finite width knife edges


  • Z. Wu,

  • T. S. M. Maclean,

  • M. J. Mehler,

  • D. J. Bagwell


An expression for the attenuation of a radio wave with respect to free space, produced by a finite width, constant height, knife edge obstacle on the ground, is derived in the form of a double integral. For the case when the ground is perfectly conducting, these integrals are evaluated in closed form. The solution for the case of cascaded, rectangular knife edges is then considered numerically. Experimental confirmation of the results for 4λ and 6λ wide, perfectly conducting knife edges is provided, together with that of two knife edges in cascade.