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公开(公告)号：US4871984A
公开(公告)日：1989-10-03
申请号：US210907
申请日：1988-06-24
IPC分类号： H03B5/32
CPC分类号： H03B5/326
摘要： A microwave surface acoustic wave resonator stabilized oscillator includes an amplifier having an input terminal and an output terminal and a feedback circuit disposed around said amplifier for providing a closed loop about said amplifier having an integral multiple of 2.pi. radians of phase shift and excess small signal gain at a frequency f.sub.o. The SAW resonator is disposed in the feedback means and is selected to operate in a fundamental mode of operation and provides a resonant circuit having a resonant frequency f.sub.o. The feedback circuit around the amplifier causes the loop to oscillate at a frequency at which the phase shift is an integral multiple of 2.pi. radians and which has excess small signal gain. As the circuit starts to oscillate, the overall gain in the loop is compressed and the loop amplifier is forced to operate in a non-linear region. Operation in non-linear region causes the amplifier to generate harmonics of the fundamental frequency and thus, by providing a circuit which extracts the harmonics of the fundamental frequency, rather than the fundamental frequency itself, the frequency range of the amplifier can be extended. Furthermore, by keeping the fundamental frequency signal in the oscillator loop, the required gain of the loop amplifier may be decreased by up to 3 db and thus can potentially lower the noise floor of the oscillator by comparable figure.
摘要翻译： 微波表面声波谐振器稳定振荡器包括具有输入端和输出端的放大器和设置在所述放大器周围的反馈电路，用于提供围绕所述放大器的闭环，其具有2ππ相移和多余的小信号的整数倍 以频率fo获得。 SAW谐振器设置在反馈装置中并被选择为在基本工作模式下工作，并提供具有谐振频率fo的谐振电路。 放大器周围的反馈电路使得环路以相移为2 pi弧度的整数倍的频率振荡，并具有过大的信号增益。 当电路开始振荡时，环路中的整体增益被压缩，环路放大器被迫在非线性区域中工作。 在非线性区域中的操作使得放大器产生基频的谐波，因此通过提供提取基频的谐波而不是基频本身的电路，可以扩展放大器的频率范围。 此外，通过将基频信号保持在振荡器环路中，环路放大器的所需增益可以减少高达3db，并且因此可以通过可比数字潜在地降低振荡器的本底噪声。
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公开(公告)号：US4555678A
公开(公告)日：1985-11-26
申请号：US554012
申请日：1983-11-21
CPC分类号： H03B5/1894 , H03B2200/0088 , H03B2202/076
摘要： An improvement in a microwave oscillator using a GaAs FET as the active element is shown to include a phase detector responsive to a portion of the positive feedback signals applied to a resonator having a high Q and to a portion of the signals out of the GaAs FET, shifted by 90.degree., to obtain signals to degenerate noise internally formed in the GaAs FET.
摘要翻译： 使用GaAs FET作为有源元件的微波振荡器的改进被示为包括相位检测器，该相位检测器响应于施加到具有高Q的谐振器的一部分的正反馈信号和来自GaAs FET的信号的一部分 ，偏移90°，以获得GaAs FET内部形成的退化噪声信号。
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公开(公告)号：US4470021A
公开(公告)日：1984-09-04
申请号：US408586
申请日：1982-08-17
申请人： Richard W. Laton
发明人： Richard W. Laton
CPC分类号： H03B9/143
摘要： A power combiner using a circularly cylindrical cavity, dimensioned to support the TM.sub.020 mode, to combine the power from coaxial diode oscillators is shown to comprise: (a) a first plurality of such oscillators disposed about the periphery of such cavity; (b) a second plurality of such oscillators disposed in coincidence with the first spatial null in the electric field in such cavity; and (c) a plurality, similar in number to the second plurality of such oscillators, of electrically conductive bridges interposed between the top and bottom walls of the cavity in-between the center conductors of the coaxial diode oscillators in the second plurlaity of such oscillators.
摘要翻译： 使用圆形圆柱形空腔的功率组合器，其尺寸设计为支持TM020模式，以组合来自同轴二极管振荡器的功率，其包括：（a）围绕该腔体的周边设置的第一多个这样的振荡器; （b）第二多个这样的振荡器，与这种空腔中的电场中的第一空间零点一致地设置; 以及（c）在这种振荡器的第二多次中，在同轴二极管振荡器的中心导体之间插入在腔的顶壁和底壁之间的多个与第二多个这样的振荡器类似的导电桥 。
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公开(公告)号：US4535302A
公开(公告)日：1985-08-13
申请号：US558217
申请日：1983-12-05
申请人： Charles S. Ward , Richard W. Laton , John A. Spada
发明人： Charles S. Ward , Richard W. Laton , John A. Spada
IPC分类号： H03F3/60
CPC分类号： H03F3/608
摘要： An improved microwave amplifier is shown to comprise an IMPATT diode in a coaxial circuit coupled to a section of double-ridged waveguide forming a resonant cavity with a low Q, such cavity in turn being coupled to outside circuitry through a compound iris.
摘要翻译： 改进的微波放大器被示为在同轴电路中包括IMPATT二极管，其耦合到形成具有低Q的谐振腔的双脊形波导的部分，这样的空腔又通过复合虹膜耦合到外部电路。
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