RF & Microwave Power Sensor Patents
© Brooke
Clarke, N6GCE 2003 - 2016
These are some patents related to measuring the power level of RF
and Microwave
signals.
7830134 Power meter with means to eliminate the
need to zero and calibrating, Richard
R. Hawkins, Jon
R. Sigler, Ladybug
Technologies Llc, Nov 9, 2010 - all about
temperature stability and measurement
7884596 Self-balancing frequency determining
bridge, Richard
R. Hawkins, Jon
R. Sigler, Feb 8, 2011 - pwr meter
measures frequency
6548999 RMS power sensor with 84 dB dynamic range April 15,
2003 324/132;
324/95;
324/115; 324/119
Anritsu Company (Morgan Hill, CA)
6407540 Switched attenuator diode microwave power sensor June
18, 2002 324/95; 250/250; 324/76.14; 324/119; 343/703
Agilent Technologies, Inc. (Palo Alto, CA)
6331769 RMS power sensor with 84 dB dynamic range December 18,
2001 324/132; 324/95; 324/115; 324/119
Anritsu Company (Morgan Hill, CA)
6291984 Dual mode diode power sensor with square law and
linear operating regions September 18, 2001 324/132; 324/95;
324/115; 324/119 Anritsu Company (Morgan Hill, CA)
6291982 True average wide dynamic range power sensor September
18, 2001 324/95 Agilent Technologies,
Inc. (Palo Alto, CA)
6242901 True average wide dynamic range microwave power sensor
using diode stack attenuator-diode stack June 5, 2001 324/95;
324/76.14; 324/115 Agilent Technologies Inc. (Palo Alto, CA)
5302024 Monolithic microwave power sensor using a heat sensing
diode junction April 12, 1994 374/122; 324/95;
324/106;
374/178 Lockheed Sanders, Inc. (Nashua, NH)
5204614
Broad-band microwave power sensor using diodes above their resonant
frequency April 20, 1993 324/95; 324/652; 333/113;
333/250 Hewlett-Packard Company (Palo Alto, CA) -
Waveguide
5204613 RF power sensor having improved linearity over greater
dynamic range April 20, 1993 324/95; 324/119
Wavetek Microwave, Inc. (Sunnyvale, CA)
4943764
Wide dynamic range radio-frequency power sensor July 24, 1990 324/95;
324/114; 324/115; 324/132 Hewlett-Packard Company (Palo Alto, CA)
4873484
Extended range composite head power sensor with three circuit
branches having a common node October 10, 1989 324/95;
324/115 Lucas Weinschel, Inc. (Gaithersburg, MD)
4789823 Power sensor for RF power measurements December 6,
1988 324/95; 257/470; 324/106 Rohde &
Schwarz GmbH & Co. KG (DE)
4628256 Thermocouple power meter December 9, 1986 324/95;
324/106; 324/118; 330/10 Weinschel Engineering Co., Inc.
(Gaithersburg, MD)
4360865 Broad band microwave detector November 23, 1982 363/126;
324/95; 329/322; 333/247 Pacific Measurements, Inc.
(Sunnyvale, CA)
4104583 Six-port measuring circuit August 1, 1978 324/638;
324/95; 324/650 (U.S.A.)
I learned about the 6-port during a
visit to NBS (now NIST) around 1970 +/- 10 years. This
circuit
uses 6 scalar power detectors to make vector measurements of
microwave
components. This is very different from a vector network
analyzer
that processes the microwave signals as vectors.
3947706
Voltage and temperature compensated linear rectifier March 30, 1976
327/538; 324/119; 327/513 U.S. (Sec of Navy)
3739269
Precision Self-Contained D.C. Substitution Bridge for R.F.
Measurements June 12, 1973 324/106; 324/95
(Weinschel Engineering)
3694746
Thin Film Thermoelectric Calorimeter for Measuring Large Values of
Microwave Power Sept. 26, 1972 324/95; 324/106 (General
Microwave)
3678395
Broadband Planar balanced Circuit July 18, 1972 455/327;
332/164; 333/238; 455/330 (GTE Sylvania)
3611130
Power Measuring and Leveling System using a self Balancing Bridge
Oct. 5, 1971 324/106; 324/95; 324/98 (U.S. Sec. of commerce)
3212015
Broadband Crystal Diode Decetor Oct. 12, 1965 327/583;
257/727; 327/1; 333/245; 439/578; 439/620; 439/641 (Fred Kruse to
Alfred Electronics)
3270282
Precision Direct Current Substitution Bridge for Measuring
R.F.
Values Aug. 30, 1966 324/106; 324/95; 324/98 (Weinschel
Engineering)
3142017
Precision Direct Current Substitution Bridge for Measuring R.F.
Values
July 21, 1964 324/106; 324/95; 324/98 (Weinschel
Engineering)
3081430
Microwave Power Meter of the Calorimeter Type Mar. 12, 1963 324/95;
324/106 (PRD Electronics)
2799826
Wattmeter Self Balancing Bridge Apaaratus July 16, 1957 324/95;
324/132 (Sperry Rand)
2577543
Power Measuring System Dec. 4, 1951 324/98; 324/95; 324/106
(U.S.
Sec. of War) - thermistor bridge power meter
2565922
High Frequency Thermistor Wattmeter Aug. 28, 19651 324/106;
324/95;
324/123R; 324/706; 330/143 (Sec of Navy)
2417820
Power Measuring Bridge March 25, 1947 324/95;
188/153R;
324/98; 324/106; 324/601; 324/616 (Sperry Gyroscope)
2415823
Electrical Equipment Feb. 18, 1947 324/101; 324/106
(Bell
Telephone Labs) - Wheatstone bridge with thermistor for comparing AC
power
to dc power
2399481
Ultra High Frequency System April 30, 1946 324/95; 324/98;
324/106;
331/44; 331/64; 331/67; 331/99; 333/33; 333/81R (RCA) -
bolometer employing
Wollaston wire
2398606
UHF Power Measurement April 16, 1946 324/92; 136/224;
159/DIG26;
219/687; 324/95; 324/98; 324/106; 333/22F; 333/22R; 374/113; 374/179
(Westinghouse)
2366618
Measuring and Control Aparatus Jan. 2 1945 236/74R;
60/39.282;
236/69; 318/676; 324/99R; 324/118; 327/50; 327/100; 330/9; 330/10;
330/114;
330/173; 374/168 (Brown Instrument Co.) - self balancng
thermocoouple
2278687
Radio Frequency Wattmeter April 7, 1942 324/106; 324/126;
363/13
(RCA) - in line wattmeter for R.F.
2278686
Radio Frequency Wattmeter April 7, 1942 324/95;
324/142;
363/13 (RCA) -
2140364
Radio Frequency Wattmeter Dec. 13, 1938 324/106; 363/13
(Westinghouse)
- uses 3 or 5 thermocouples
2005986
Impedance Set June 25, 1935 338/128; 338/202 (Leeds &
Northrup)
- Decade box that does not "jump" when switching settings
1957454
Power Output Indicator for High Frequency Aparatus May 8, 1934
324/106;
136/224; 324/77.11; 324/157 (L. Gebhard) - thermocouples located in
cooling
fluid
1791563
Electrical Semipotentiometer Feb 10, 1931 324/723; 324/157;
374/179
(Wilson-Maeulen Co.) - thermocouple temperature measurement
1590420
Comparator June 29, 1926 324/98; 324/72; 324/140R
(Westinghouse)
- bridge compars ac and dc currents
1472125
Measuring Aparatus Oct. 30, 1923 324/443; 99/DIG11; 324/442;
340/870.43 (Leeds & Northrup) - Weatstone bridge used to measure
the resistance
of boiler water to determine of there's too much salt and the boiler
needs
to be blown down.
1407147
Thermal Ammeter 21 Feb. 1922 324/106; 136/222; 363/13
(Weston
Electrical Inst. Co.) - hot wire method
1379266
Compensation Method and Aparatus May 24, 1921 324/721;
324/443;
324/706; 374/174 (Leeds & Northrup) - temperature compensated
Wheatstone
bridge for measuring electrolytes
1039925
Alternating Current Measuring Aparatus Oct. 1, 1912 324/101;
324/106
(B. Gati) - barretter with nulling current applied to measure AC
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