Using a radar system in a motor vehicle, high frequency individual signal pulses are transmitted from at least one transmitting antenna, and at least one receiving antenna receives reception signals formed by reflection of the transmitted signal pulses from objects in the surroundings. The reception signals are mixed with the high-frequency signal to produce low-frequency mixed signals representing the sequence of individual signal pulses. The phase angle of the mixed signals is varied over successive individual signal pulses thereof by varying the phase angle of: the successive individual transmitted signal pulses, the high-frequency signals used for the mixing, and/or the mixed signals. In further processing of the mixed signals to determine the distance and the relative velocity of detected objects, an interference component can be separated and/or suppressed from a useful signal component because the useful signal component has the known phase angle variation but the interference component does not.

Radar system having arrangements and methods for the decoupling of transmitting and receiving signals and for the suppression of interference radiation

A radar system, apparatus, and method includes at least one radar transmitter for transmitting an electromagnetic waveform; a receiving antenna comprising a plurality of receiving antenna elements and delay lines, each of the plurality of receiving antenna elements receiving the return signal operatively associated with a predetermined delay line; each delay line having a delay length which produces a different phase delay in the return signal; the different phase delays producing substantially different antenna patterns for the received signal at a given frequency; at least one processor operatively connected to receive data from the plurality of delay lines; the at least one processor operating to analyze the substantially different beam patterns for a given frequency; whereby the processing of the data produces results indicating the presence and location of a target.

Radar system and antenna with delay lines and method thereof

A ground penetrating radar system is described that is able to create both low frequency, wide pulses, and high frequency, narrow pulses, to enable both deep and shallow operation of the ground penetrating radar on demand, including simultaneous operation.

Adjustable pulse width ground penetrating radar

Representative implementations of devices and techniques provide a time delay based on an input value. A digital delay may be generated based on a coarse delay and a fine delay. The coarse delay may be selected based on the input value. The fine delay may be selected from an overlapping set of fine delay intervals, based on the selected coarse delay. In some implementations, a control component may be used to select the fine delay when more than one fine delay interval is indicated.

Redundant delay digital-to-time converter

Systems and methods for shielding a metal detector head include placement of conductive shielding around the coils of the head to reduce the effects of capacitance variation between the coils and their surroundings.

Shieldings for metal detector heads and manufacturing methods thereof

A system for providing signal trigger pulses comprises an equivalent time sampling unit providing transmit and receive trigger pairs, and a control unit controlling the equivalent time sampling unit to provide pseudorandom delay length variations between the trigger pairs.

Systems and methods for providing trigger timing

A variable delay apparatus comprises a calibrating unit receiving a signal from a variable delay unit (101) and from a plurality of fixed delay sources (401, 402, 403), the calibrating unit comparing the signal from the variable delay unit (101) with a plurality of signals from the fixed delay sources (401, 402, 403) to control operation of the variable delay unit (101) over a delay range independently of environmentally-induced drift.

Systems and methods for providing delayed signals

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Systems and methods for providing trigger timing

Systems and methods for providing delayed signals