MIMO antenna with elevation detection

A multiple input multiple output (MIMO) antenna for a radar system, said antenna consisting of:

• a first transmit-antenna-arrangement that consists of a first vertical-array of radiator elements and a second vertical-array of radiator elements, said first transmit-antenna-arrangement configured so the first vertical-array can be selectively coupled to a transmitter independent of the second vertical-array;
• and
• a second transmit-antenna-arrangement that consists of a third vertical-array of radiator elements and a fourth vertical-array of radiator elements that match the first vertical-array and the second vertical-array, said second transmit-antenna-arrangement configured so the third vertical-array can be selectively coupled to a transmitter independent of the fourth vertical-array, wherein the second transmit-antenna-arrangement is vertically offset from the first transmit-antenna-arrangement by a vertical offset distance selected so the MIMO antenna can be used to determine an elevation angle to a target, wherein the vertical offset distance is such that a horizontal line passes through both the first transmit-antenna-arrangement and the second transmit-antenna-arrangement;
• and
• a receive-antenna configured to detect radar-signals transmitted by the first transmit-antenna-arrangement and the second transmit-antenna-arrangement and reflected by the target toward the receive-antenna, whereby the antenna can be used to determine the elevation angle based on a phase offset of radar-signals detected by the receive-antenna originating from the first transmit-antenna-arrangement and the second transmit-antenna-arrangement.