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    • 4. 发明授权
    • Frequency divider circuit and frequency synthesizer using the same
    • 分频器电路和频率合成器使用相同
    • US4679003A
    • 1987-07-07
    • US905262
    • 1986-09-09
    • Morikazu SagawaYoshikazu MoriMotoi OhbaMitsuo MakimotoSadahiko Yamashita
    • Morikazu SagawaYoshikazu MoriMotoi OhbaMitsuo MakimotoSadahiko Yamashita
    • H03B19/18H03L7/04
    • H03B19/18
    • A wide band analog frequency divider circuit operable at a high frequency in the GHz band, and a frequency synthesizer utilizing the analog frequency divider circuit. The analog frequency divider circuit comprises an LC series circuit having a capacitor and an inductor connected between the anode and the cathode of a diode, and means for applying a forward bias to the diode. The input signal is supplied from the anode side of the diode, and the output is delivered from the cathode side, or the anode side of the cathode is grounded. The frequency synthesizer is arranged to frequency divide the output of a VCO by the analog frequency divider circuit, and to supply the frequency-divided output to a prescaler. The output of the prescaler is further frequency divided by a programmable divider, and the phase difference between the output of the programmable divider and a reference signal is detected thereby to control the oscillation frequency of the VCO.
    • 宽带模拟分频器电路,其工作频率为GHz频带,频率合成器利用模拟分频电路。 模拟分频器电路包括具有连接在二极管的阳极和阴极之间的电容器和电感器的LC串联电路,以及用于向二极管施加正向偏压的装置。 输入信号从二极管的阳极侧提供,输出从阴极侧输出,或阴极的阳极侧接地。 频率合成器被布置成通过模拟分频器电路对VCO的输出进行分频,并将分频输出提供给预分频器。 预分频器的输出进一步由可编程分频器分频,并且检测可编程分频器的输出与参考信号之间的相位差,从而控制VCO的振荡频率。
    • 6. 发明授权
    • Ring resonator oscillator usable in frequency synthesizers and
communication apparatus
    • 环形振荡器可用于频率合成器和通信设备
    • US5587690A
    • 1996-12-24
    • US509663
    • 1995-07-31
    • Hiroyuki YabukiMorikazu SagawaMitsuo Makimoto
    • Hiroyuki YabukiMorikazu SagawaMitsuo Makimoto
    • H01P7/08H03B1/00H03B5/18H03B7/12H03B7/14H03D7/16H03L7/099H03L7/10H30L7/099
    • H01P7/088H03B5/1852H03B7/12H03L7/099H03B2200/0016H03B2200/0034H03B2200/0048H03B2201/0208H03B2201/0225H03B7/14H03D7/161H03L7/10
    • A first oscillator includes: a ring resonator; an oscillation circuit having a negative resistance active circuit coupled to a first point on the ring resonator for oscillating at an oscillation frequency and resonating the resonator; an output terminal, coupled to a second point on the ring resonator where a voltage is substantially zero with respect to the predetermined frequency when the ring resonator resonates, for outputting a resonant frequency signal, wherein even order harmonic components are outputted with the fundamental component suppressed. A second oscillator includes a ring resonator having points A to D equidistantly dividing the ring resonator, first and second oscillation circuits coupled to the points A and B respectively, first and second grounding capacitors having capacitance equivalent to those of the first and second oscillation circuits. Thus, two independent oscillators which do not affect each other are provided with a single resonator. In the first and second oscillators, grounding capacitors, a resonant capacitor may be provided to miniaturize the oscillator. Variable capacitances may be provided to prevent the point from moving with a change in the controlled oscillation frequency. Frequency synthesizers and communication apparatus including the first or second oscillator are also disclosed.
    • 第一振荡器包括:环形谐振器; 振荡电路,其具有耦合到所述环形谐振器上的第一点的负电阻有源电路,以振荡频率振荡并谐振谐振器; 输出端子,耦合到环形谐振器上的第二点,其中当环形谐振器谐振时相对于预定频率的电压基本上为零,用于输出谐振频率信号,其中偶数次谐波分量被抑制成基本分量 。 第二振荡器包括环形谐振器,其具有等距分割环形谐振器的点A至D,分别耦合到点A和B的第一和第二振荡电路,第一和第二接地电容器具有与第一和第二振荡电路相同的电容。 因此,没有彼此影响的两个独立振荡器设置有单个谐振器。 在第一和第二振荡器中,可以提供接地电容器,谐振电容器以使振荡器小型化。 可以提供可变电容以防止点随着受控振荡频率的变化而移动。 还公开了包括第一或第二振荡器的频率合成器和通信装置。
    • 10. 发明授权
    • Plane type strip-line filter in which strip line is shortened and mode resonator in which two types microwaves are independently resonated
    • 平面型带状滤波器,其中带状线被缩短,双模谐振器,其中两种类型的微波被独立谐振
    • US06201458B1
    • 2001-03-13
    • US09262645
    • 1999-03-04
    • Michiaki MatsuoMorikazu SagawaMitsuo Makimoto
    • Michiaki MatsuoMorikazu SagawaMitsuo Makimoto
    • H01P120
    • H01P1/20381H01P7/082H01P7/084
    • A strip-line filter is provided with upper- and lower-stage resonators having the same electromagnetic characteristics. Each of the resonators has a one-wavelength square-shaped strip line and four open-end transmission lines connected to four coupling points A,C,B and D (or E,G,F and H) of each resonator which are spaced 90 degrees in electric length in that order. The square-shaped strip lines have a pair of parallel coupling lines closely placed in parallel to each other to electromagnetically couple the resonators. Therefore, the filter can be manufactured in a small size. A first microwave resonated in each resonator is electromagnetically influenced by two open-end transmission lines connected to two coupling points A and B (or E and F), and a second microwave resonated in each resonator is electromagnetically influenced by two open-end transmission lines connected to two coupling points C and D (or G and H). Therefore, resonance wavelengths of the microwaves can be longer than a line length of each square-shaped strip line. Also, the resonance wavelengths can be adjusted by trimming the transmission lines. Also, because all constitutional elements are made of strip lines, the filter can be made plane.
    • 带状滤波器设置有具有相同电磁特性的上级和下级谐振器。 每个谐振器具有单波长方形带状线和连接到每个谐振器的四个耦合点A,C,B和D(或E,G,F和H)的四个开路端传输线,其间隔开90° 电气长度的顺序。 方形带状线具有彼此平行地紧密放置的一对平行的耦合线,以电磁耦合谐振器。 因此,过滤器可以制造成小尺寸。 在每个谐振器中谐振的第一微波由两个连接到两个耦合点A和B(或E和F)的开路传输线进行电磁学影响,并且每个谐振器中谐振的第二微波由两个开路传输线 连接到两个耦合点C和D(或G和H)。 因此,微波的共振波长可以比每个方形带状线的线长长。 此外,可以通过修整传输线来调节谐振波长。 另外,由于所有的构成元件均由带状线制成,所以可以将滤光片制成平面。