Local area positioning system slave receiver
First Claim
Patent Images
1. A local area positioning receiver, comprising:
- a filter configured to accept an input signal including signal components having frequencies in the range of about 900 MHZ to 1 GHz and attenuate signal components having frequencies less than about 900 MHZ and greater than about 1 GHz to output a filtered signal;
a mixing amplifier structured to amplify the filtered signal and mix it with a stable mixing signal to produce an intermediate frequency mixed signal;
a splitter structured to divide the intermediate frequency mixed signal into a first mixed sub-signal and a second mixed sub-signal;
an automatic gain control unit controller coupled to the splitter and structured to receive the first mixed sub-signal;
a GaAs amplifier coupled to the splitter and structured to amplify the second mixed sub-signal to produce an amplified second mixed sub-signal;
a Shottky diode detector coupled to the GaAs amplifier and structured to receive the amplified second mixed sub-signal and produce a corresponding direct-current detector output signal;
a data slicer/comparator operative to receive the detector output signal and produce a corresponding low-voltage transistor-to-transistor logic signal; and
a GaAs single-pole double throw switch structured to be actuated by the low-voltage transistor-to-transistor logic signal at a frequency of about 1 GHz.
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Abstract
The local area positioning system (LAPS) slave receiver is an extremely sensitive, ultra low noise, high speed up-converting microwave receiver operating in the 900 Mhz to 1.6 Ghz frequency range and is designed for use with a positioning system. The receiver, which may include fiber optic links, allows detection and switching of high speed short duration pulses used to control an associated highly stable 1.0 Ghz start/stop event counter. The receiver, in combination with the counter, is capable of measuring RF propagation distances with an accuracy of 12 inches.
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1 Claim
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1. A local area positioning receiver, comprising:
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a filter configured to accept an input signal including signal components having frequencies in the range of about 900 MHZ to 1 GHz and attenuate signal components having frequencies less than about 900 MHZ and greater than about 1 GHz to output a filtered signal; a mixing amplifier structured to amplify the filtered signal and mix it with a stable mixing signal to produce an intermediate frequency mixed signal; a splitter structured to divide the intermediate frequency mixed signal into a first mixed sub-signal and a second mixed sub-signal; an automatic gain control unit controller coupled to the splitter and structured to receive the first mixed sub-signal; a GaAs amplifier coupled to the splitter and structured to amplify the second mixed sub-signal to produce an amplified second mixed sub-signal; a Shottky diode detector coupled to the GaAs amplifier and structured to receive the amplified second mixed sub-signal and produce a corresponding direct-current detector output signal; a data slicer/comparator operative to receive the detector output signal and produce a corresponding low-voltage transistor-to-transistor logic signal; and a GaAs single-pole double throw switch structured to be actuated by the low-voltage transistor-to-transistor logic signal at a frequency of about 1 GHz.
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Specification
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Current AssigneeLAPS
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Original AssigneeWCR Company
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InventorsWatson, Mitchell L., Numbers, Victor B.
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Primary Examiner(s)Pope, Daryl C
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Application NumberUS11/084,079Time in Patent Office335 DaysField of Search340/539.1, 340/870.4, 340/572.7, 455/130, 455/132, 455/136, 455/138, 455/227, 455/311, 455/313US Class Current340/539.13CPC Class CodesG01S 11/06 using intensity measurements
