Quadrature radar apparatus

Details Quadrature radar apparatus Quadrature radar apparatus

2008-12-24

2010-02-02

Gregory, Bernarr E (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

Complex signal

C342S021000, C342S070000, C342S082000, C342S089000, C342S175000, C342S192000, C342S193000

Reexamination Certificate

active

07656347

ABSTRACT:
A quadrature radar apparatus includes a quadrature signal generating unit, a plurality of coupler modules connected to the signal generating unit, an antenna unit receiving transmission signals from the coupler modules and a reception signal reflected from a target, one or more phase delay modules connected between one or more of the coupler modules and the antenna unit to delay the phases of the transmission and reception signals by 90 degrees, a leakage signal canceling unit combining the reception signals inputted from the antenna unit through the first and second coupler modules and removes the transmission leakage signal.

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Choul-Young Kim, et al. “A Quadrature Radar Topology With Tx Leakage Canceller, for 24-GHz Radar Applications”, IEEE Transactions on Microwave Theory and Techniques, vol. 55, No. 7, Jul. 2007.

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