GB955822A - Improvements in or relating to microwave detecting devices - Google Patents

Improvements in or relating to microwave detecting devices

Info

Publication number
GB955822A
GB955822A GB2648059A GB2648059A GB955822A GB 955822 A GB955822 A GB 955822A GB 2648059 A GB2648059 A GB 2648059A GB 2648059 A GB2648059 A GB 2648059A GB 955822 A GB955822 A GB 955822A
Authority
GB
United Kingdom
Prior art keywords
shutter
meter
stub
waveguide
waveguide section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2648059A
Inventor
Eric Samuel Kingston
James Francis Taylor
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB2648059A priority Critical patent/GB955822A/en
Publication of GB955822A publication Critical patent/GB955822A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D9/00—Demodulation or transference of modulation of modulated electromagnetic waves
    • H03D9/02—Demodulation using distributed inductance and capacitance, e.g. in feeder lines
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
    • G01R17/10—AC or DC measuring bridges
    • G01R17/16—AC or DC measuring bridges with discharge tubes or semiconductor devices in one or more arms of the bridge, e.g. voltmeter using a difference amplifier

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

955,822. Testing microwave systems. ELECTRIC & MUSICAL INDUSTRIES Ltd. July 27, 1960 [Aug. 1, 1959], No. 26480/59. Heading H4L. [Also in Division G1] An apparatus for detecting leaks in highpower microwave systems comprises a waveguide section 1 having a closed end 2 and an open end 3 which may be closed completely or opened to any desired extent by a variable selfclosing shutter 5. A crystal detector 9 is contained in a waveguide stub 6 and is connected to a conductor 10 which passes through an oppositely disposed waveguide stub 11 of conical door knob form serving as a low pass filter for frequencies below 9 kmc/s. The end of the stub 11 is connected via a coaxial cable 13 to the input of a transistor amplifier 20, 21, supplying an indicator meter 28. The waveguide section 1 is in the form of a pistol barrel provided with a trigger (not shown) initial pressure on the trigger operating switches 25, 31, the shutter remaining closed to allow zero setting of the meter by the potentiometer 24, and continued pressure progressively opening the shutter. In use the open end 3 of the waveguide section is pointed at a suspected leakage point the variable shutter acting as a sensitivity control. The amplifier, meter, and batteries are all enclosed in the pistol device.
GB2648059A 1959-08-01 1959-08-01 Improvements in or relating to microwave detecting devices Expired GB955822A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2648059A GB955822A (en) 1959-08-01 1959-08-01 Improvements in or relating to microwave detecting devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2648059A GB955822A (en) 1959-08-01 1959-08-01 Improvements in or relating to microwave detecting devices

Publications (1)

Publication Number Publication Date
GB955822A true GB955822A (en) 1964-04-22

Family

ID=10244306

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2648059A Expired GB955822A (en) 1959-08-01 1959-08-01 Improvements in or relating to microwave detecting devices

Country Status (1)

Country Link
GB (1) GB955822A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120229324A1 (en) * 2011-03-11 2012-09-13 Thomas W. Gow Human presence detector suitable for concealment and using a shaped microwave beam
FR2985366A1 (en) * 2011-12-30 2013-07-05 Thales Sa Microwave frequency generator, has waveguides equipped with sealing units, and sealing units allowing supply and/or extraction of electromagnetic waves from cavity by waveguides when sealing units are in pass configuration

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120229324A1 (en) * 2011-03-11 2012-09-13 Thomas W. Gow Human presence detector suitable for concealment and using a shaped microwave beam
US8912944B2 (en) * 2011-03-11 2014-12-16 Thomas W. Gow Human presence detector suitable for concealment and using a shaped microwave beam
FR2985366A1 (en) * 2011-12-30 2013-07-05 Thales Sa Microwave frequency generator, has waveguides equipped with sealing units, and sealing units allowing supply and/or extraction of electromagnetic waves from cavity by waveguides when sealing units are in pass configuration

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