Planar Circuits for Microwaves and Lightwaves

Until recently, three principal classes had been known in the electrical cir­ cuitry. They were as follows: 1) The lumped-constant circuit, which should be called a zero-dimensional circuit, in the sense that the circuit elements are much smaller in size as compared with the wavelength in all three spatial directions. 2) The distributed-constant circuit, which should be called a one-dimensional ci...