| US 7,554,486 B2 | ||
| System and method for dual polarization radar with automatic built-in test equipment and calibration | ||
| William H. Walker, Madison, Ala. (US) | ||
| Assigned to Baron Services, Inc., Huntsville, Ala. (US) | ||
| Filed on Dec. 07, 2007, as Appl. No. 11/952,206. | ||
| Application 11/952206 is a continuation in part of application No. 11/941905, filed on Nov. 16, 2007. | ||
| Claims priority of provisional application 60/906730, filed on Mar. 13, 2007. | ||
| Prior Publication US 2008/0224920 A1, Sep. 18, 2008 | ||
| Int. Cl. G01S 7/40 (2006.01); G01S 13/00 (2006.01); G01S 7/00 (2006.01) | ||
| U.S. Cl. 342—174 [342/82; 342/89; 342/165; 342/173; 342/175; 342/188; 342/195] | 8 Claims |
| 5. A calibration system for a dual polarization radar system comprising:
a radar transmitter that transmits signals in horizontal and vertical polarizations;
a radar receiver that receives the horizontal and vertical polarization signals;
a noise source generator that produces a background noise signal that is 30 dB higher than standard atmospheric noise;
a 3 dB power divider that divides the background noise signal; and
a calibration circuit for the radar receiver that calibrates the system to compensate for atmospheric background noise with
the divided background noise signal.
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