PHASE MODULATOR BASED ON SYNCHRONIZED OSCILLATORS.

A phase modulator (20) designed to obtain at its output a stable phase margin of 360 degrees, comprising: a generator for injecting (200) a signal at an input frequency ?0; a push-push oscillator which in turn comprises a first oscillator (201) and a second oscillator (202) equal to the first (201), both oscillators (201, 202) operating at the same input frequency ?0;, said first and second oscillators (201, 202) being connected to each other by means of a coupling network (203) designed so that the outputs of both oscillators (201, 202) are 180 degrees out of phase with each other, where said push-push oscillator further comprises a power combination network (204) designed to sum the output of both oscillators (201, 202) and obtain a single output (205) whose operating frequency is twice said input frequency 2 ?0; and means (207) for injecting said input signal from the generator (200), offset 180 degrees, simultaneously to each of said first and second oscillators (201, 202). The phase modulator (20) comprises a biasing and control network (206) configured to provide a plurality of control voltages (v1, v2, v 3...) to said first and second oscillators (201, 202), there being as many values for the control voltages as the number of phase values necessary for a certain type of phase modulation, where said values of phase are adjusted by adjusting at least one of said control voltages. (Machine-translation by Google Translate, not legally binding)