GB1327452A - Waveguides - Google Patents

Waveguides

Info

Publication number
GB1327452A
GB1327452A GB1327452DA GB1327452A GB 1327452 A GB1327452 A GB 1327452A GB 1327452D A GB1327452D A GB 1327452DA GB 1327452 A GB1327452 A GB 1327452A
Authority
GB
United Kingdom
Prior art keywords
sample
waveguide
micro
moisture content
wave
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
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.)
Rank Organization Ltd
Original Assignee
Rank Organization 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 Rank Organization Ltd filed Critical Rank Organization Ltd
Publication of GB1327452A publication Critical patent/GB1327452A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/08—Dielectric windows
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
    • G01N22/04—Investigating moisture content

Abstract

1327452 Measuring moisture content electrically RANK ORGANISATION Ltd 7 July 1971 [8 July 1970] 33114/70 Heading G1N The moisture content of a fluent paste sample 8 is measured by positioning the sample 8 between opposed buds 14, 16 of waveguide sections 10, 12 or a split waveguide provided with barrier seals 6 to prevent the sample from entering the waveguides 10, 12 when they are moved towards each other to squeeze the sample 8 to an even thickness. The attenuation of a micro-wave passing down the waveguide by the sample is measured to determine the moisture content of the sample. The ends 14, 16 lie at an angle 4 to the axis of the waveguide to minimise reflections from the sample surface and the seals 6, transparent to the micro-wave, are of a thickness to assist in the minimization of the reflections. Circular plates 2, 2a are fixed at the ends of the sections 10, 12 and may include dielectric filled recesses 3 to prevent radial propagation of the micro-wave. A thermistor may be employed to provide a temperature compensation signal.
GB1327452D 1970-07-08 1970-07-08 Waveguides Expired GB1327452A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3311470 1970-07-08

Publications (1)

Publication Number Publication Date
GB1327452A true GB1327452A (en) 1973-08-22

Family

ID=10348747

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1327452D Expired GB1327452A (en) 1970-07-08 1970-07-08 Waveguides

Country Status (2)

Country Link
DE (1) DE2134107A1 (en)
GB (1) GB1327452A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8039801B2 (en) 2004-12-27 2011-10-18 Canon Kabushiki Kaisha Detection apparatus for detecting electromagnetic wave passed through object
WO2015090630A1 (en) * 2013-12-19 2015-06-25 Vega Grieshaber Kg Radar-operated level gauge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8039801B2 (en) 2004-12-27 2011-10-18 Canon Kabushiki Kaisha Detection apparatus for detecting electromagnetic wave passed through object
WO2015090630A1 (en) * 2013-12-19 2015-06-25 Vega Grieshaber Kg Radar-operated level gauge

Also Published As

Publication number Publication date
DE2134107A1 (en) 1972-01-20

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees