6 results about "Short range radar" patented technology

The present invention discloses an energy-saving system and a method thereof for an efficient use of electrical energy, which is suitable for use in a first vehicle (1). Said system comprises at least one long-range radar (3); at least one short-range radar (4); at least one energy source (6) providing electrical energy to said long-range radar (3) and to said short-range radar (4); at least one control unit (5), which is connected to said long-range radar (3) and to said short-range radar (4), can be energized by means of said energy source (6), is configured to process the data detected by means of said long-range radar (3) and said short-range radar (4), and to enable said long-range radar (3) and said short-range radar (4) to operate in a first energy-saving mode if the first vehicle (1) moves at a low speed in a congested traffic. Said method comprises the steps of detecting by said control unit (5) whether a low-speed movement of the first vehicle (1) has occurred in a congested traffic; if a low-speed movement of the first vehicle (1) has not occurred in a congested traffic, operating the long-range radar (3) and the short-range radar (4) in a high power consumption mode by means of the control unit (5); if a low-speed movement of the first vehicle (1) has occurred in a congested traffic, operating the long-range radar (3) and the short-range radar (4) in a first energy-saving mode by means of the control unit (5).

A calibration method for operating a CW short-range radar system in obtaining calibrated intermediate frequency in-phase and quadrature outputs comprises measuring at least one reflective static calibration target at a plurality of at least four different target ranges and processing the received CW radar measurement signal by performing a quadrature down-conversion of the received CW radar beam intensity and phase to obtain measured intermediate frequency in-phase outputs and intermediate frequency quadrature outputs. These are used to solve a system of equations for calibration parameter values including an amplitude mismatch a phase mismatch between the quadrature signals, and individual DC offsets of the quadrature signals.

Short-range radar and radar operating method. This description relates to a radar (50) comprising an electromagnetic wave receiver (30) including an electromagnetic wave receiving antenna (32) connected to an integrated circuit including a low-noise differential amplifier (35) and an attenuation circuit (ATT) interposed between the receiving antenna (32) and the low-noise differential amplifier (35), the attenuation circuit (ATT) comprising at least first, second, third, and fourth transistors. Figure for the abstract: Fig. 5

A short-range radar device comprises a receiving antenna, an input transformer connected to the receiving antenna, a tunable-local-oscillator amplifier to receive a radar signal, a local-oscillator transformer connected to the tunable-local-oscillator amplifier, a mixer respectively connected to the input transformer and the local-oscillator transformer, and an adjustable-transimpedance amplifier connected to the mixer and outputting an intermediate-frequency signal. Portion of a differential signal output by the local-oscillator transformer is leaked to the receiving antenna through the mixer and / or through signal coupling between the local-oscillator transformer and the input transformer, and the portion of the differential signal leaking to the receiving antenna can be used as the radar signal radiated by the short-range radar device of the present invention, so as to detect targets at near distances, and therefore a dedicated transmitting antenna and its related amplifier circuits can be optionally eliminated to achieve the objective of the present invention.

Signal request device (10) for a road traffic signal system, comprising a housing (14) in which a request device for a pedestrian release signal is arranged, wherein the request device is at least one short-range radar sensor (22), wherein the housing (14) has a housing top (18) which is transparent in at least one partial area (26), with an optical display device (24) arranged therein behind the transparent partial area (26), and in which the at least one short-range radar sensor (22) is arranged behind a further partial area (36) such that its radar beam penetrates the housing top (18), characterized in that a row (40L, 40R) of light-emitting diodes (42) is arranged on both sides of the further partial area (36).

A radar transmit antenna of a head mounted device transmits a transmission radar signal to a face-region. A radar receiver antenna of the head mounted device receives a return radar signal from the face-region. The return radar signal is matched to a selected expression signal included in a plurality of expression signals stored in an expression database.