Patent ID: 8514125
Filing Date: 2013-08-20
Classification: G01S

Abstract:
1. A distance measurement arrangement that provides a distance indication based on a delay between an electromagnetic signal which is transmitted in a transmission mode, and a reflection of the electromagnetic signal which is received in a reception mode, the distance measurement arrangement comprising: an antenna module comprising a plurality of antennas for transmitting the electromagnetic signal and for receiving the reflection; a beam-forming module for defining respective magnitude and phase relationships with respect to respective antennas in the antenna module so as to cause the antenna module to provide a directional antenna pattern in at least one of the two transmission mode and the reception mode; and a beam-forming and steering control module for controlling the respective magnitude and phase relationships as a function of a direction command, wherein the beam-forming module comprises a gain/phase adjustment circuit, the gain/phase adjustment circuit comprising: a pair of transmission lines of different length for providing a first delayed signal and a second delayed signal in response to an input signal; a pair of gain-controllable circuits for providing a first gain-adjusted delayed signal and a second gain-adjust delayed signal in response to the first delayed signal and the second delayed signal, respectively; and a signal combiner for combining the first gain adjusted delayed signal and the second gain-adjusted delayed signal, wherein the beam-forming and steering control module is configured to control a ratio between the first gain adjusted delayed signal and the second gain-adjusted delayed signal.