公开(公告)号：US5446923A

公开(公告)日：1995-08-29

申请号：US205169

申请日：1994-03-03

Applicant: Glen D. Martinson ,  Marian M. Burin

Inventor： Glen D. Martinson ,  Marian M. Burin

IPC: G01S7/02 ,  H03B19/00 ,  H03D7/02 ,  H04B1/26 ,  H04B1/28 ,  G01S7/285 ,  G01S7/36

CPC classification number: H03D7/02 ,  H04B1/26 ,  G01S7/022 ,  H03B19/00

Abstract: A mixer is provided having a mixing element, an input signal port for incoming signals at a frequency f.sub.IN, a local oscillator signal port for signals from a local oscillator having a fundamental frequency f.sub.LO, and an output port from which the resultant frequency may be taken. Means are provided to impose a DC component of bias voltage across the mixing element at one of three levels. The mixer is such that it has a pair of conduction threshold voltages which are substantially symmetrical above and below zero volts, beyond which the mixing element will be conductive at least when a signal from the local oscillator is imposed on it. The signal from the local oscillator has substantially sinusoidal voltage waveform, with a peak-to-peak voltage which is greater than the voltage difference between the pair of conduction threshold voltages. When the first zero DC component bias voltage is imposed across the mixer element, the mixing element is conductive in respective symmetrical positive-going and negative-going senses, and the maximized resultant frequency is .vertline.f.sub.IN .+-.2f.sub.LO .vertline.. When the second DC component of bias voltage is imposed across the mixing element, it conducts only once per cycle of local oscillator voltage, so that the maximized resultant frequency is .vertline.f.sub.IN .+-.f.sub.LO .vertline.. When the third DC component of bias voltage is imposed across the mixing element, the value of voltage across the mixing element exceeds the threshold voltage in the same sense as the voltage shift for about 35% to about 55% of the period of the local oscillator voltage cycle making the mixer conductive, but it is also conductive in the opposite sense for at least a portion of the remaining period of the cycle, so that third harmonic mixing occurs, and the maximized resultant frequency is .vertline.f.sub.IN .+-.3f.sub.LO .vertline..

Abstract translation: 提供混频器，其具有混频元件，用于频率fIN的输入信号的输入信号端口，用于来自具有基频fLO的本地振荡器的信号的本地振荡器信号端口以及可以从其获得合成频率的输出端口 。 提供装置以在三个级别中的一个级别上施加跨混合元件的偏置电压的DC分量。 混频器使得它具有一对导通阈值电压，它们在零伏以上和低于零电压基本上是对称的，超过该导通阈值电压至少当来自本地振荡器的信号被施加时，混合元件将导通。 来自本地振荡器的信号具有基本上正弦的电压波形，峰 - 峰电压大于一对导通阈值电压之间的电压差。 当第一零直流分量偏置电压施加在混频器元件上时，混合元件在相应的对称正向和负向感测中是导电的，并且最大化的合成频率为| fIN +/- 2fLO |。 当偏置电压的第二直流分量施加在混频元件上时，它每周期本地振荡器电压仅传导一次，使最大合成频率为| fIN +/- fLO |。 当偏置电压的第三直流分量施加在混频元件上时，混频元件两端的电压值超出与本地振荡器周期约35％至约55％的电压偏移相同的阈值电压 电压周期使得混频器导通，但是对于周期的剩余周期的至少一部分，它也在相反的方向上导通，使得发生三次谐波混合，并且最大化的合成频率为| fIN +/- 3fLO |。

公开(公告)号：US4939521A

公开(公告)日：1990-07-03

申请号：US242536

申请日：1988-09-12

Applicant: Marian M. Burin

Inventor： Marian M. Burin

IPC: G01S7/02 ,  H01P1/203

CPC classification number: G01S7/022 ,  H01P1/20363

Abstract: The invention concerns a radar detection device--particularly a radar detection for police radar--which is improved with regard to undesirable microwave emissions therefrom. For the X-band and the K-band, for example, two horn antennae are provided, each associated with a local oscillator. A mixer is provided to mix signals from each horn antenna and from its respective local oscillator. Each antenna is made specific to radar signals within its respective band, and precautions are taken to avoid emission of K-band radiation from the larger X-band horn. For example, a bandpass filter for X-band radiation may be used in a feed line branch to the mixer from the X-band horn. The K-band radiation may be fed through in a feed line branch approaching the mixer from an opposed direction.

Abstract translation: 本发明涉及一种雷达检测装置，特别是用于警察雷达的雷达检测，其对于不期望的微波发射而言是有改进的。 例如，对于X波段和K波段，提供两个喇叭天线，每个天线与本地振荡器相关联。 提供混频器来混合来自每个喇叭天线及其各自本地振荡器的信号。 每个天线都是针对其各自频带内的雷达信号而做出的，并采取预防措施，以避免从较大的X波段号角发射K波段辐射。 例如，用于X波段辐射的带通滤波器可以用于从X波段喇叭到混合器的馈线分支中。 K波段辐射可以在从相对的方向接近混合器的馈线分支中进给。