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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
    • Flip-chip MMIC resonator circuit with off-chip coplanar waveguide inductor.
    • Flip-Chip-MMIC-Oszillatoranordnung mit koplanarem resonanceem Induktor auf einem separaten Chip。
    • EP0495206A2
    • 1992-07-22
    • EP91121332.0
    • 1991-12-12
    • Hughes Aircraft Company
    • Wen, Cheng P.Mendolia, Gregory S.Siracusa, MarioMaieron, Joseph J.Higdon, William D.
    • H01P3/00H03B5/18
    • H03B5/1852H03B2200/0086H03B2201/011H03B2201/014H03B2201/02Y10T29/49004
    • A coplanar waveguide based microwave monolithic integrated circuit (MMIC) oscillator chip (14) has an active oscillator element (16) and a resonant capacitor (18) formed thereon and is flip-chip mounted on a dielectric substrate (12). A resonant inductor (22) is formed on the substrate (12) and interconnected with the resonant capacitor (18) to form a high Q-factor resonant circuit for the oscillator (10). The resonant inductor (22) includes a shorted coplanar waveguide section (24) consisting of first and second ground strips (24b, 24c), and a conductor strip (24a) extending between the first and second ground strips (24b, 24c) in parallel relation thereto and being separated therefrom by first and second spaces (26a, 26b), respectively. A shorting strip (24d) electrically interconnects adjacent ends of the conductor strip (24a) and first and second ground strips (24b, 24c), respectively. A dielectric film (34) may be formed over at least adjacent portions of the conductor strip (24a) and first and second ground strips (24b, 24c). The resonant inductor (22) is adjusted to provide a predetermined resonant frequency for the oscillator (10) by using a laser to remove part of the dielectric film (34) in the first and second spaces (26a, 26b) for fine adjustment, and/or to remove part of the shorting strip (24d) at the ends of the first and second spaces (26a, 26b) for coarse adjustment.
    • 基于共面波导的微波单片集成电路(MMIC)振荡器芯片(14)具有形成在其上的有源振荡器元件(16)和谐振电容器(18),并被倒装安装在电介质基片(12)上。 谐振电感器(22)形成在衬底(12)上并与谐振电容器(18)互连,以形成振荡器(10)的高Q因子谐振电路。 谐振电感器(22)包括由第一和第二接地条(24b,24c)组成的短路共面波导部分(24)和在第一和第二接地条(24b,24c)之间平行延伸的导体条(24a) 分别与第一和第二空间(26a,26b)分离。 短路条(24d)分别将导体条(24a)的相邻端和第一和第二接地条(24b,24c)互连。 绝缘膜(34)可以形成在导体条(24a)和第一和第二接地条(24b,24c)的至少相邻部分上。 谐振电感器(22)被调节以通过使用激光去除第一和第二空间(26a,26b)中的电介质膜(34)的一部分用于微调的振荡器(10)的预定谐振频率,以及 /或去除用于粗调的第一和第二空间(26a,26b)的端部处的部分短路条(24d)。