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公开(公告)号：US3743933A
公开(公告)日：1973-07-03
申请号：US3743933D
申请日：1971-09-09
Applicant: SFIM
Inventor： PRETI J
CPC classification number: G01S13/92 , D03C3/24 , H03D9/0616
Abstract: An arrangement including a main wave guide flanked by two auxiliary wave guides, all being arranged parallel to one another. Each lateral wall of the main wave guide is formed with a slot, the slots providing openings between the main wave guide and the auxiliary wave guide. The length of each slot is equal to the wave length in air of the wave which is propagated in the main wave guide. One end of one auxiliary wave guide absorbs an incident wave traveling in one direction, and one end of the other auxiliary wave guide reflects an incident wave traveling in the same direction. At its other end, each auxiliary wave guide may have a crystal for receiving energy flowing in the opposite direction toward that other end. The wave guide arrangement may form part of a detection means including a source of microwaves for providing signals traveling along the main wave guide in said one direction, an aerial for transmitting and also for providing signals traveling along the wave guide in the opposite direction, an amplifier chain connected to each of the crystals, and a phase comparator connected to the amplifier chains.
Abstract translation: 一种包括主波导管的布置，其两侧辅助波导，全部彼此平行布置。 主波导的每个侧壁形成有槽，所述槽在主波导和辅助波导之间提供开口。 每个槽的长度等于在主波导中传播的波的空气中的波长。 一个辅助波导的一端吸收在一个方向上行进的入射波，另一个辅助波导的一端反射沿相同方向行进的入射波。 在另一端，每个辅助波导可以具有用于接收朝向另一端的相反方向流动的能量的晶体。 波导布置可以形成检测装置的一部分，该检测装置包括用于沿着所述一个方向提供沿主波导传播的信号的微波源，用于传输的天线，并且还用于沿相反方向沿着波导传播信号， 连接到每个晶体的放大器链，以及连接到放大器链的相位比较器。
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2.发明授权
公开(公告)号：US3806942A
公开(公告)日：1974-04-23
申请号：US32828973
申请日：1973-01-31
Applicant: SFIM
Inventor： PRETI J
IPC: H01Q1/24
CPC classification number: H01Q1/247
Abstract: A transmitting and receiving head for a Doppler effect radar detector comprising a rectangular waveguide into which a transmitting and a receiving aerial are coupled and which contains a crystal mixer between the two aerials, energy fed to one end of the waveguide being radiated by the transmitting aerial and passing through an obturator which allows a controlled leakage to reach the mixer for mixing with the energy delivered to the other end of the waveguide by the receiving aerial.
Abstract translation: 一种用于多普勒效应雷达检测器的发射和接收头，包括发射和接收天线耦合到其中并且在两个天线之间包含晶体混合器的矩形波导，馈送到波导的一端的能量由发射天线辐射 并且通过允许受控的泄漏的阻塞器到达混合器以与通过接收天线传送到波导的另一端的能量混合。
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公开(公告)号：US3798641A
公开(公告)日：1974-03-19
申请号：US3798641D
申请日：1971-05-03
Applicant: SFIM
Inventor： PRETI J
CPC classification number: B61L25/045 , G01S13/82
Abstract: A method and system for identifying a vehicle. An interrogation station transmits a frequency modulated continuous microwave to a vehicle having responder equipment which modulates the received microwave in accordance with an identifying binary code which is decoded at the interrogation station which receives the reflected modulated microwave. The modulation may be further frequency modulated at two different frequencies or may be modulated to give decoded pulses having different widths.
Abstract translation: 一种用于识别车辆的方法和系统。 询问站根据在接收反射调制微波的询问站解码的识别二进制码向具有响应器设备的车辆发送调频连续微波。 调制可以在两个不同频率进一步进行频率调制，或者可以被调制以给出具有不同宽度的解码脉冲。
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公开(公告)号：US3836965A
公开(公告)日：1974-09-17
申请号：US32828873
申请日：1973-01-31
Applicant: FAB D INSTR DE MEASURE SFIM SO
Inventor： PRETI J
CPC classification number: G08G1/01
Abstract: A vehicle presence detector circuit for the control of coloured light traffic signals in which the output of a Doppler radar system, representing the speed of vehicles, operates a relay when the speed drops below a threshold value and the relay is only reset when the speed signal exceeds a higher threshold value.
Abstract translation: 一种用于控制彩色光交通信号的车辆存在检测器电路，其中表示车辆速度的多普勒雷达系统的输出在速度低于阈值时操作继电器，并且仅当速度信号 超过较高的阈值。
