Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1980-10-20
1984-06-26
Tubbesing, T. H.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 5DD, 343 12A, 343 14, G01S 1304
Patent
active
044569114
ABSTRACT:
A frequency modulated continuous wave altimeter and method of detecting the presence of an object in a predetermined area. The altimeter is generally comprised of an antenna for receiving and radiating microwave energy, a transmitter for generating frequency modulated microwave energy, a mixer for generating a sinusoidal resulting signal from the communication of transmitted and reflected microwave energy, and a receiver for processing the resulting signal and generating an output signal indicative of distance. The transmitter includes a Gunn diode for generating a carrier signal, modulating means for varying the frequency of the carrier signal, and a high frequency oscillator for impressing a tone on the modulating means. The receiver includes multiple staged amplifiers tuned to the frequency of the tone for selectively amplifying the resulting signal, a detector for generating a signal responsive to the inflection points on the sinusoidal resulting signal, and a counter for generating an output indicative of distance from the number of inflection points detected.
REFERENCES:
patent: 3343164 (1967-09-01), Clarke
patent: 3772697 (1973-11-01), Ross
patent: 3806941 (1974-04-01), Cheal
patent: 3836960 (1974-09-01), Gehman et al.
patent: 3886549 (1975-05-01), Cheal et al.
patent: 3932871 (1976-01-01), Foote
patent: 4044354 (1977-08-01), Bosher et al.
Regineld Hansford, "Radio Aids To Civil Aviation", pp. 274-284, published by Heywood, London, England.
Capt. Grayson Merrill, "Airborne Radar", pp. 310-321, published by D. Van Nostrand Co., Inc.
Microwave Sensors, Inc.
Tubbesing T. H.
LandOfFree
Frequency modulated continuous wave altimeter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Frequency modulated continuous wave altimeter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency modulated continuous wave altimeter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2234635