Patent ID: 6903624

Claim:
An apparatus for applying a short circuit in a waveguide transmission line, comprising: a section of rectangular waveguide that permits propagation of radio frequency (RF) energy, said section having a first broad wall, an opposed second broad wall, a first narrow wall, and an opposed second narrow wall; an inlet port through which said RF energy is fed into said waveguide section; an outlet port through which said RF energy exits said waveguide section; a vane positioned within the inlet port and pivotable between a shorting position at which said vane substantially blocks propagation of said RF energy into the inlet port and an open position at which said vane substantially passes said RF energy through the inlet port; and a pivot shaft penetrating said waveguide section and perpendicular to a direction of propagation of said RF energy, said pivot shaft centered across between the broad walls of said waveguide section, said pivot shaft affixed to said first and second narrow walls and serving as the pivoting member for said vane.