Active antenna radar system
AssigneeTDK Corporation
InventorDenver Humphrey
Life of this patent
Estimating the term…
Abstract
A radar system comprising a transmit antenna, a receive antenna and a mixer for combining a signal received by said receive antenna with a reference signal to produce an output signal. The transmit antenna includes an active antenna oscillator, the reference signal being derived from the active antenna oscillator. The active antenna oscillator is turned on and off by a pulse modulated biasing signal to produce a pulse modulated RF signal. The reference signal is delayed before being supplied to the mixer, the output of the mixer being used to determine when a detected object is a pre-determined distance from the system.
Claims16
An object detection system comprising a transmit antenna, a receive antenna and means for processing a signal received by said receive antenna with a reference signal, wherein said transmit antenna comprises at least one active antenna oscillator, said reference signal being derived from said at least one active antenna oscillator.
A radar system comprising a transmit antenna, a receive antenna and means for processing a signal received by said receive antenna with a reference signal, wherein said transmit antenna comprises at least one active antenna oscillator, said reference signal being derived from said at least one active antenna oscillator.
In an object detection system comprising a transmit antenna, a receive antenna and means for processing a signal received by said receive antenna with a reference signal to produce an output signal, wherein said transmit antenna comprises at least one active antenna oscillator, a method of detecting a object, the method including deriving said reference signal from said at least one active antenna oscillator;
- delaying said reference signal before said reference signal is supplied to said processing means;
- determining that a detected object is a predetermined distance from the system depending on the output signal.
Dependencies are inferred from the claim text.