| 摘要 |
A microwave/millimeter wave injection/synchronization oscillator, wherein an oscillation circuit section (15) is provided with an active element section (1), a resonance circuit (4) which is connected to one end side of the section (1) and resonates at a prescribed frequency (f), and a harmonic output circuit (3) which is connected to the other end side of the section (1) and fetches signals containing nth harmonic components (n: an integer) of the signals having the frequency (f). An injection circuit section (16) is connected to the oscillation circuit section (15) through an input terminal (7) and injects a reference signal having the frequency component of f/m (m: an integer) to the resonance circuit (4) through the input terminal (7). Therefore, signals in the resonance circuit (4) are synchronized to the reference signal in frequency. The injection circuit section (16) can use a crystal oscillator for a stable low frequency. The above-mentioned constitution 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.
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