Microwave/millimeter-wave injection/synchronization oscillator
Patent 6252469 Issued on June 26, 2001. Estimated Expiration Date: 
May 11, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 11, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesSelf-oscillating mixer circuit Current pulse-injected, phase-locked oscillator Division by noninteger numbers using synchronous oscillators Transmission injection-locked dielectric resonator oscillator Patent #: 4737737 InventorApplicationNo. 297935 filed on 05/11/1999US Classes:331/117D, Distributed parameter resonator transistor oscillators331/96, WITH DISTRIBUTED PARAMETER RESONATOR331/172, WITH SYNCHRONIZING, TRIGGERING OR PULSING CIRCUITS331/177VWith voltage sensitive capacitorExaminersPrimary: Mis, DavidForeign Patent References
International ClassH03B 005/18Foreign Application Priority Data1996-11-11 JPAbstractIn a 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 predetermined frequency f, and a harmonic output circuit (3) connected with the active element section (1) at the other side thereof and providing a signal having an nth (n: an integer ࣙ2) 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 allows the frequency to be easily converted up to the millimeter wave band, reduces unnecessary wave signals, and widens the variable range of the frequency.Other References
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