Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2005-11-22
2005-11-22
Mullen, Jr., Thomas J. (Department: 2632)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S552000, C340S572200, C324S228000, C324S239000, C342S070000
Reexamination Certificate
active
06967574
ABSTRACT:
A multi-mode electromagnetic target discrimination sensor system for transmitting an electromagnetic signal and receiving a reflected signal from at least one target is disclosed having a variable inductance antenna having a variable inductance transmitter and a variable inductance receiver for varying at least one of operating bandwidth, sensitivity and size of the antenna, a processor for alternating between a time domain operating mode and a frequency domain operating mode, and controlling the variation of the inductance of the variable inductance antenna based on a current operating mode, and at least one processing algorithm for receiving signals from the receiver, discriminating targets from the received signals, and outputting the discrimination results is disclosed.
REFERENCES:
patent: 5414411 (1995-05-01), Lahr
patent: 5576624 (1996-11-01), Candy
patent: 6456079 (2002-09-01), Ott et al.
patent: 6587072 (2003-07-01), Gresham et al.
Cooch Francis A.
Mullen Jr. Thomas J.
The Johns Hopkins University
Walk Samuel J.
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