Communications: directive radio wave systems and devices (e.g. – With particular circuit – Display
Patent
1988-04-19
1990-02-13
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
Display
342107, 250332, G01S 1389, H01L 2714
Patent
active
049010840
ABSTRACT:
A millimeter wave object detection and location system is disclosed comprising a source generating a millimeter wave signal which is divided into an illumination beam, directed onto a field of view, and a local oscillator portion, mixed with radiation reflected from objects in the field of view. The mixing is performed in a staring array of mixer/detector elements which need not be mechanically or electronically scanned to generate signals responsive to the entire field of view. The detected signal from each element is directly responsive to a portion of the field of view. The oscillator signal is preferably linearly polarized, and a polarizing grid is used to separate the local oscillator signal and illumination beam and direct them in a simple and efficient manner. A twist reflector may also be used to rotate the polarization of a portion of the beam to direct it onto the mixer/detector array for mixing with the received signal from the field of view.
Improved constructions of millimeter wave source and mixer/detector elements are also disclosed, which greatly simplify construction of the device.
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Deo Naresh C.
Goldsmith Paul F.
Huguenin Richard G.
Walker David K.
Barron Jr. Gilberto
Millitech Corporation
Tarcza Thomas H.
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