Abstract: A non-radiative dielectric (NRD) waveguide modulator is provided having a waveguide type hybrid coupler, in which by forming a waveguide type 180° hybrid coupler and waveguide as a single body, the structure is simplified and manufacturing processes are reduced. The NRD waveguide modulator includes a conducting housing having a lower conducting plate and an upper conducting plate; a hybrid coupler which is processed in the form of conduit lines inside the conducting housing and includes a ring portion and a plurality of waveguides extended from the ring portion in the radial direction, in modulator, and a termination which is connected to an isolation port that is an end of any one waveguide of the hybrid coupler and terminates a signal reflected by the modulator by consuming the signal internally.

Abstract: Provided is a non-radiative dielectric (NRD) waveguide modulator having a waveguide type hybrid coupler, in which by forming a waveguide type 180° hybrid coupler and waveguides as a single body, the structure is simplified and manufacturing processes are reduced such that consistency of characteristics is maintained, manufacturing time and cost are reduced, and consequently, manufacturability is improved.