| 摘要 |
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. The NRD waveguide modulator comprises a conducting housing which comprises 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 comprises a ring portion and a plurality of waveguides extended from the ring portion in the radius direction, in which according to the phase differences of the waveguides, a local oscillation signal input from a local oscillator through any one side waveguide is distributed to at least two waveguides and propagated; a modulator which comprises dielectric line which is disposed in an internal space formed in the conducting housing and receives a local oscillation signal from the hybrid coupler and a diode mount which is disposed on a predetermined point and on which a Schottky diode is mounted; 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.
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