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    • 2. 发明公开
    • Dual mode cavity stabilized oscillator
    • 振荡器与频率确定双模式谐振腔。
    • EP0123448A1
    • 1984-10-31
    • EP84302026.4
    • 1984-03-27
    • Ford Aerospace & Communications Corporation
    • Fiedziuszko, Slawomir
    • H03B5/18
    • H03B5/1817H03B5/1823H03B5/1829H03B5/1864H03B2200/0068H03B2201/014H03B2201/0208
    • A stable electromagnetic oscillator (30) comprises an amplifying element (3) in feedback association with a dual mode resonant cavity (12) that provides a double pole bandpass filter function. Two orthogonal modes (1 and 2) of electromagnetic energy resonate within the cavity (12). An output fromthe amplifying element (3) excitationally couples into the first mode (1), while the second mode (2) couples into the input of the amplifying element (3). The output (8) of the oscillator (30) is obtained from the first mode (1). Optional injection lock can be used for greater stability by means of coupling a stable a.c. reference (9) into the cavity (12) in alignment with the second mode (2). Optional electronic frequency tuning comprises a phase or frequency comparator (11) and a reference a.c. source (13), producing a d.c. feedback signal fed to varactor diodes (10). Coupling ports (4, 5, 6, 7) of the cavity (12) can be, e.g., irises, capacitive probes, coaxial probes, or any combination thereof. The electrical field associated with each port (4,5,6,7) is aligned with the electrical field of the mode (1 or 2) coupled thereby. A dielectric resonator can be positioned within the cavity (12) to allow for physical shrinking of the cavity (12) while maintaining the electromagnetic characteristics of the cavity (12).
    • 7. 发明公开
    • Microwave oscillator
    • 微波振荡器
    • EP0114437A1
    • 1984-08-01
    • EP83201795.8
    • 1983-12-15
    • PHILIPS ELECTRONICS UK LIMITEDPhilips Electronics N.V.
    • Bates, Robert Neil
    • H03B9/14
    • H03B9/146H03B2200/0074H03B2201/014
    • A microwave oscillator suitable for millimetre wavelengths comprises a Gunn diode (3) coupled to a wavelength (1) by a resonant-cap structure (5,6). The diode (3) generates microwave energy both at a fundamental frequency f o which is below the cut-off frequency of the waveguide (1) and at a second harmonic frequency 2f o above cut-off. To control the generation of microwave energy at 2f o , energy at f o may be coupled into the waveguide (1), e.g. from an adjacent further waveguide (9) above its cut-off, by means of an electric probe (8) extending close to the cap (5). The probe (8) may couple in a locking signal at or close to the free-running value of f o from another oscillator having better noise performance and electronic tuning, thereby locking 2f o to twice the frequency of the locking signal, or alternatively may couple to a varactor-tuned cavity resonant at f o .
    • 适用于毫米波长的微波振荡器包括通过谐振帽结构(5,6)耦合到波长(1)的耿氏二极管(3)。 二极管(3)在低于波导(1)的截止频率的基本频率fo处和高于截止频率的第二谐波频率2fo处产生微波能量。 为了控制2fo处的微波能量的产生,fo处的能量可以耦合到波导(1)中,例如, 从其邻近的另一个波导(9)的截止点开始,借助于靠近帽(5)延伸的电探针(8)。 探头(8)可以在来自具有更好噪声性能和电子调谐的另一个振荡器的fo的自由运行值处或接近fo的自由运行值的锁定信号中耦合,从而将2fo锁定到锁定信号频率的两倍,或者可以耦合到 在fo处谐振的变容二极管调谐腔。
    • 9. 发明公开
    • Voltage-controlled oscillator and method for adjusting frequency shift amount thereof
    • Spannungsgesteuerter Oszillator und Verfahren zum Einstellen seiner Frequenzverschiebung
    • EP0938185A1
    • 1999-08-25
    • EP99103120.4
    • 1999-02-17
    • TDK Corporation
    • Katsumata, MasashiEndo, Takeshi
    • H03B5/12
    • H03B5/1231H03B5/1203H03B5/1243H03B5/1293H03B2201/014H03B2201/0258
    • A voltage-controlled oscillator and a method capable of precisely adjusting a frequency shift amount are provided irrespective of a fluctuation in characteristics of elements such as a strip-line. A center tap 19 is formed in a strip-line 16 of a resonator. A switching element 20 is connected to the center tap 19, and this switching element 20 is turned ON, so that the center tap is shortcircuited to the ground so as to vary the oscillating frequency. A slit A1 is conducted in the vicinity of the center tap 19 along the strip-line 16 and directed toward a shortcircuited end 17 of the strip-line, so that a frequency shift amount is adjusted. Also, a slit B1 is conducted in the vicinity of the shortcircuited end 17 along the strip-line 16 and directed toward the center tap 19, so that a frequency shift amount is adjusted. Also, trimming points are provided on the side of a hot terminal 18 from the center tap 19, and also provided on the side of the shortcircuited end 17 from the center tap 19, and further a slit is conducted along an intersecting direction of the strip-line 16, so that a shift amount is adjusted.
    • 提供压控振荡器和能够精确调整频移量的方法,而不管带状线等元件的特性波动。 中心抽头19形成在谐振器的带状线16中。 开关元件20连接到中心抽头19,并且该开关元件20导通,使得中心抽头短路到地,以便改变振荡频率。 狭缝A1沿着带状线16在中心龙头19附近被引导并且指向带状线的短路端17,从而调整频移量。 此外,狭缝B1沿着带状线16在短路端17附近被引导并指向中心抽头19,从而调整频移量。 此外,修剪点从中心抽头19设置在热端子18的一侧,并且还从中心抽头19设置在短路端17的一侧,并且还沿着条带的交叉方向 线16,使得移动量被调整。