We present here anN‐pole circuit analysis of a network of parallel plane grids immersed in an isotropic hot‐electron plasma. The associated self‐ and trans‐impedances are expressed in terms of the discrete spectrum of electrostatic waves. Voltage‐transfer ratios and transconductances between pairs of grid assemblies are calculated to study the feasibility of this scheme for launching and detecting Landau waves. Results show that widths of about 5 Debye lengths are optimum for modulator and detector gaps and that close‐range transmission between gaps is predominantly due to the fundamental exponentially damped Landau wave.