DE920317C - Cavity frequency meter with clear frequency display - Google Patents

Cavity frequency meter with clear frequency display

Info

Publication number
DE920317C
DE920317C DEB8508D DEB0008508D DE920317C DE 920317 C DE920317 C DE 920317C DE B8508 D DEB8508 D DE B8508D DE B0008508 D DEB0008508 D DE B0008508D DE 920317 C DE920317 C DE 920317C
Authority
DE
Germany
Prior art keywords
frequency
cavity
piston
frequency meter
clear
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
DEB8508D
Other languages
German (de)
Inventor
Oskar Dipl-Ing Henle
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.)
BLAUPUNKT ELEKTRONIK GmbH
Original Assignee
BLAUPUNKT ELEKTRONIK GmbH
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 BLAUPUNKT ELEKTRONIK GmbH filed Critical BLAUPUNKT ELEKTRONIK GmbH
Priority to DEB8508D priority Critical patent/DE920317C/en
Application granted granted Critical
Publication of DE920317C publication Critical patent/DE920317C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/06—Cavity resonators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/04—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage adapted for measuring in circuits having distributed constants

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Description

Zur Messung von Frequenzen im Gebiet der Zentimeter- und Dezimeterwellen sind Hohlraumfrequenzmesser bekannt, die darauf beruhen, daß ein Hohlraum, meist mit rundem oder rechteckigem Querschnitt, mittels eines verschiebbaren Kolbens in seiner Längsrichtung geändert wird, und zwar so lange, bis seine Eigenschwingung mit der Frequenz des zu untersuchenden Senders übereinstimmt. Diese Frequenzmesser haben den Nachteil, daß sie nicht eindeutig sind, sondern bei vorgegebener Sendefrequenz entsprechend den theoretisch möglichen Eigen resonanzen an mehreren Stellen einen Ausschlag ergeben. Praktisch tritt neben der sogenannten H11-Anregung, die ausgenutzt wird, meist die E0t-Anregung als Störur.g auf. For measuring frequencies in the area of centimeter and decimeter waves cavity frequency meters are known that are based on the fact that a cavity, mostly with a round or rectangular cross-section, by means of a sliding piston in its longitudinal direction is changed, until its natural oscillation corresponds to the frequency of the transmitter to be examined. These frequency meters have the disadvantage that they are not unique, but rather at a given transmission frequency according to the theoretically possible self-resonances in several places Turn out to be the decisive factor. Practically occurs in addition to the so-called H11 excitation, which is exploited usually the E0t excitation as disturbance.

Gemäß der Erfindung wird vorgeschlagen, statt eines massiven metaltischen Kolbens zur Abstimmung einen solchen Kolben zu verwenden, der nur bei der gewünschten Hohlraumanregung die ,elektischen Wellen refiekriert. According to the invention it is proposed instead of a solid metal table Piston to vote to use such a piston, only when desired Cavity excitation refiects the electric waves.

Abb. I zeigt in schematischer Darstellung einen Hohlraumfrequenzmesser. I ist der zylindrische Hohlraum, 2 die Einkoppelungsöffnung, 3 der verschiebbare Kolben und 4 die Anzeigevorrichtung, bestehend aus Detektor und Meßinstrument. Fig. I shows a schematic representation of a cavity frequency meter. I is the cylindrical cavity, 2 the coupling opening, 3 the sliding one Piston and 4 the display device, consisting of detector and measuring instrument.

Abb. 2 zeigt den Kolben, gemäß der Erfindung ausgeführt für einen zylindrischen Hohlraumfrequenzmesser. Er besteht aus einem Drahtgitter in der Form der elektrischen Kraftlinien der H11-Anregung leines zylindrischen Hohlraumes und wirkt also nur für solche Schwingungen, deren V;ektorrichtung dem gezeichneten Pfeil entspricht, als Kurzschluß. Um den Einfluß des hinter dem Kolben liegenden Raumes 5 zu beseitigen, wird weiterhin vorgeschlagen, diesen Raum mit einem dämpfenden Mittel, z. B. Hochfrequenzeisen, so auszuführen, daß er nicht in Resonanz geraten kann. Fig. 2 shows the piston, carried out according to the invention for a cylindrical cavity frequency meter. It consists of a wire mesh in the shape of the electrical lines of force of the H11 excitation in a cylindrical cavity and thus only works for those vibrations whose vector direction is indicated by the arrow corresponds to, as a short circuit. About the influence of the space behind the piston 5, it is also suggested that this space be provided with a dampening Medium, e.g. B. high-frequency iron to perform so that it does not get into resonance can.

Claims (3)

PATENTANSPRÜCHE: I. Hohlraumfrequenzmesser für Zentimeter-oder Dezinzeterw,e'len mit einem verschiebbaren metallischen Abstimmkolb en, dadurch gekennzeichnet, daß die Kolbénfläche nicht massiv, sondern derart ausgebildet ist, daß sie nur bei Schwingungsanregung eines Typs der,elektrischen Wellen reflektiert. PATENT CLAIMS: I. Cavity frequency meter for centimeter or decimal meters, e'len with a displaceable metallic tuning piston, characterized in that the Kolbénfläche is not solid, but designed in such a way that it is only when vibrating of a type that reflects electrical waves. 2. HohJlraumwelZenmesser nach Anspruch I, dadurch gekennzeichnet, daß der Abstimmkolben aus einem Drahtnetz besteht, dessen Drähtle in Richtung der bei der gewünschten Schwingungsanregung auftretenden Feidrichtung verlaufen. 2. HohJlraumwelZenmesser according to claim I, characterized in that that the tuning piston consists of a wire mesh, the wires in the direction of with the desired vibration excitation occurring field direction. 3. Hohlraumfrequenzmesser nach Anspruch I, dadurch gekennzeichnet, daß der Kolben aus elektrisch durchlässigem Material besteht, auf das ein Netz von Leitern in Richtung der bei dem gewünschten Anregungstyp auftretenden Schwingungen aufgetreten ist, 3. Cavity frequency meter according to claim I, characterized in that that the piston is made of electrically permeable material on which a network of Ladders in the direction of the vibrations occurring with the desired type of excitation occured,
DEB8508D 1945-01-27 1945-01-27 Cavity frequency meter with clear frequency display Expired DE920317C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB8508D DE920317C (en) 1945-01-27 1945-01-27 Cavity frequency meter with clear frequency display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB8508D DE920317C (en) 1945-01-27 1945-01-27 Cavity frequency meter with clear frequency display

Publications (1)

Publication Number Publication Date
DE920317C true DE920317C (en) 1954-11-18

Family

ID=6955873

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB8508D Expired DE920317C (en) 1945-01-27 1945-01-27 Cavity frequency meter with clear frequency display

Country Status (1)

Country Link
DE (1) DE920317C (en)

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