Nonlinear Delay Lines. The line has a Bragg cutoff frequency given by:. The equivalent circuit of a varactor diode periodically loaded Coplanar Waveguide (CPW) line is shown below:. GaAs Monolithic Nonlinear Delay Lines. Layout of the GaAs Monolithic NDL. Less than 3dB insertion loss up to 20 GHz 80 ps useable delay range.