| 摘要 |
In an microwave/millimeter-wave injection locked oscillator, an oscillation circuit (15) has an active element section (1), a resonant circuit (4) connected with the active element section (1) at one side thereof and resonating at a predetermined frequency f, and a harmonic output circuit (3) connected with the active element section (1) at the other side thereof and fetching a signal having an nth (n: an integer) harmonic component of the signal having the frequency f from the resonant circuit (4). An injection circuit (16) is connected with the oscillation circuit (15) via an input terminal (7). A reference signal having a frequency component of f/m (m: integer) is injected through the input terminal (7) into the resonant circuit (4), whereby signals in the resonant circuit (4) are frequency-locked to the reference signal. The injection circuit (16) can use a crystal oscillator for a stable low frequency. This arrangement makes the frequency to be easily raised up to the millimeter wave band, reduces unnecessary wave signals, and widens the variable range of the frequency. <IMAGE> |
