Radiation sensor

Details Radiation sensor Radiation sensor

1991-07-23

1998-10-27

Blum, Theodore M.

Communications: radio wave antennas

Antennas

With spaced or external radio wave refractor

343756, 343909, H01Q 1910

Patent

active

058283447

ABSTRACT:
A radiation sensor for the microwave and millimeter-wave regions incorporates a lens having two parallel focal planes, these being defined by a polarization-selective reflector grid within the lens. One focal plane is occupied by a receive array of crossed dipole antennas with respective mixer diodes. One dipole of each antenna couples to a local oscillator signal and the other couples to a receive signal reflected by the grid. These signals are mixed by the diodes to produce intermediate frequency signals for subsequent processing. The other focal plane is occupied by a transmit array of separately activatable polarization switching antennas arranged to define a range of transmit beam directions. This focal plane may alternatively be occupied by a second receive array.

REFERENCES:
patent: 3763493 (1973-10-01), Shimada et al.
patent: 4604624 (1986-08-01), Amitay et al.
patent: 5089828 (1992-02-01), Moss

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