[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

DE885874C - Method for frequency modulating centimeter waves - Google Patents

Method for frequency modulating centimeter waves

Info

Publication number
DE885874C
DE885874C DEE4578A DEE0004578A DE885874C DE 885874 C DE885874 C DE 885874C DE E4578 A DEE4578 A DE E4578A DE E0004578 A DEE0004578 A DE E0004578A DE 885874 C DE885874 C DE 885874C
Authority
DE
Germany
Prior art keywords
frequency
modulated
centimeter waves
frequency modulating
generators
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
DEE4578A
Other languages
German (de)
Inventor
Hans Dr Meinke
Hermann Dipl-Phys Ritzl
Wolfgang Dipl-Ing Voelk
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.)
ELEK SCHE MESSTECHNIK
Wolfgang Federmann Dip GmbH
Original Assignee
ELEK SCHE MESSTECHNIK
Wolfgang Federmann Dip 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 ELEK SCHE MESSTECHNIK, Wolfgang Federmann Dip GmbH filed Critical ELEK SCHE MESSTECHNIK
Priority to DEE4578A priority Critical patent/DE885874C/en
Application granted granted Critical
Publication of DE885874C publication Critical patent/DE885874C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/08—Modifications of modulator to linearise modulation, e.g. by feedback, and clearly applicable to more than one type of modulator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation

Landscapes

  • Transmitters (AREA)

Description

Auf dem- Gebiet der Zentimeterwellen wird häufig; z. B. für die Zwecke der Multiplexübertragung oder des Fernsehens, die Aufgabe gestellt,. eine weitgehend lineare Frequenzmodulation mit möglichst großem Frequenzhub durchzuführen.In the field of centimeter waves, it is common; z. B. for purposes multiplex transmission or television, the task set. a largely to carry out linear frequency modulation with the largest possible frequency deviation.

Nach dem Verfahren der Erfindung wird diese Aufgabe dadurch gelöst, daß zwei Frequenzgeneratoien, deren verhältnismäßig hoch gewählte Trägerfrequenzen einen Frequenzunterschied aufweisen, welcher der zu modulierenden Trägerfrequenz entspricht, gegenphasig mit gleichem Frequenzhub moduliert und-.dann zur Überlagerung gebracht werden.According to the method of the invention, this object is achieved by that two frequency generators, their relatively high chosen carrier frequencies have a frequency difference that of the carrier frequency to be modulated corresponds, modulated in phase opposition with the same frequency deviation and then for superposition to be brought.

Ein Ausführungsbeispiel der Erfindung wird an Hand der Zeichnung erläutert.An embodiment of the invention is explained with reference to the drawing.

G1 und G2 sind zwei Frequenzgeneratoren, vorzugsweise Klystrons, die bei dem gewählten Beispiel mit der Trägerfrequenz f l = 9500 MHz bzw. f 2 = 8500 MHz schwingen. Beide Generatoren werden mit der Frequenz f," = zo MHz in der Frequenz moduliert, wobei jedoch die Frequenz f," den beiden Generatoren gegenphasig, d. h. mit einer Phasenverschiebung von i80° aufgedrückt wird.G1 and G2 are two frequency generators, preferably klystrons, which in the example chosen oscillate with the carrier frequency f l = 9500 MHz and f 2 = 8500 MHz, respectively. Both generators are frequency-modulated with the frequency f, "= zo MHz, but the frequency f," is impressed on the two generators in antiphase, ie with a phase shift of 180 °.

Die modulierten Schwingungen der beiden Generatoren werden in einer Mischstufe M zur Überlagerung gebracht, an deren Ausgang somit eine Trägerfrequenz f 3 = f, - f, = iooo MHz auftritt, welche mit der Frequenz fM = 2o MHz moduliert ist und über eine Verstärkerstufe E der vorgesehenen Verwendung zugeführt wird. Im Bedarfsfalle könnte selbstverständlich die am Ausgang der Mischstufe M erzeugte Frequenz durch Umsetzung oder Frequenzvervielfachung in ein beliebiges Frequenzgebiet verschoben werden, das für die gedachte Verwendung zweckmäßig erscheint.The modulated vibrations of the two generators are in one Mixer M brought to the superposition, thus a carrier frequency at the output f 3 = f, - f, = 100 MHz occurs, which modulates with the frequency fM = 20 MHz and is fed to the intended use via an amplifier stage E. If necessary, the output of the mixer M could of course be generated Frequency through conversion or frequency multiplication in any frequency range be moved that appears appropriate for the intended use.

Nach dem erfindungsgemäßen Verfahren läßt sich eine weitgehend lineare Frequenzmodulation mit Frequenzhüben erzielen, die ein Vielfaches der bisher erreichbaren Werte betragen.According to the method according to the invention, a largely linear Achieve frequency modulation with frequency swings that are a multiple of what was previously achievable Values are.

Claims (1)

PATENTANSPRUCH: Verfahren zur Erzielung eines großen Frequenzhubes bei der Frequenzmodulation von Zentimeterwellen, dadurch gekennzeichnet, daß zwei Frequenzgeneratoren, deren verhältnismäßig hoch gewählte Trägerfrequenzen einen Frequenzunterschied aufweisen, welcher der zu modulierenden Trägerfrequenz entspricht, gegenphasig mit gleichem Frequenzhub moduliert und dann zur Überlagerung gebracht werden. Angezogene Druckschriften Deutsche Patentschrift Nr. 361387; französische Patentschrift Nr. 9o8 726.PATENT CLAIM: A method for achieving a large frequency deviation in the frequency modulation of centimeter waves, characterized in that two frequency generators, whose relatively high selected carrier frequencies have a frequency difference that corresponds to the carrier frequency to be modulated, are modulated in phase opposition with the same frequency deviation and then superimposed. Cited publications German Patent No. 361,387; French patent specification no. 908 726.
DEE4578A 1951-11-10 1951-11-10 Method for frequency modulating centimeter waves Expired DE885874C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEE4578A DE885874C (en) 1951-11-10 1951-11-10 Method for frequency modulating centimeter waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE4578A DE885874C (en) 1951-11-10 1951-11-10 Method for frequency modulating centimeter waves

Publications (1)

Publication Number Publication Date
DE885874C true DE885874C (en) 1953-08-10

Family

ID=7066340

Family Applications (1)

Application Number Title Priority Date Filing Date
DEE4578A Expired DE885874C (en) 1951-11-10 1951-11-10 Method for frequency modulating centimeter waves

Country Status (1)

Country Link
DE (1) DE885874C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297695B (en) * 1962-05-04 1969-06-19 Siemens Ag Modulation circuit for generating highly linearly frequency-modulated electromagnetic waves with two oscillators

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE361387C (en) * 1920-02-28 1922-10-13 Marconi Wireless Telegraph Co Wireless telephony transmitter
FR908726A (en) * 1943-10-28 1946-04-17 Thomson Houston Comp Francaise Improvements to frequency modulated wave transmitters

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE361387C (en) * 1920-02-28 1922-10-13 Marconi Wireless Telegraph Co Wireless telephony transmitter
FR908726A (en) * 1943-10-28 1946-04-17 Thomson Houston Comp Francaise Improvements to frequency modulated wave transmitters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297695B (en) * 1962-05-04 1969-06-19 Siemens Ag Modulation circuit for generating highly linearly frequency-modulated electromagnetic waves with two oscillators

Similar Documents

Publication Publication Date Title
DE709375C (en) Device for interference-free signal transmission
DE885874C (en) Method for frequency modulating centimeter waves
DE2222735C3 (en) System for the transmission of phase corrections in a radio navigation system, in particular a differential OMEGA system
DE1207455B (en) Modulation circuitry
DE1206496B (en) Circuit arrangement for frequency conversion of alternating current signals
DE1591075B2 (en) Arrangement for generating the side vibrations of amplitude-modulated high-frequency vibrations
DE811966C (en) Transmitter circuit for phase or frequency modulated oscillations
EP0012917A1 (en) Homodyne transmission system
DE872076C (en) Radio direction finding transmission method
DE2801525A1 (en) ANGLE MODULABLE OSCILLATOR
DE19533123C2 (en) Signal generator for generating a linear frequency modulated signal
DE943957C (en) Circuit arrangement for overlay reception of amplitude-modulated and frequency-modulated oscillations
DE809823C (en) Device for synchronizing the phase of an oscillation generated by an oscillator with a control oscillation
AT158055B (en) Homodyne circuit for heterodyne receivers.
DE754469C (en) Method and arrangement for generating a frequency-modulated oscillation
DE2019128A1 (en) Device for displaying the differences in the degrees of modulation of a carrier wave modulated with two modulation signals of different frequencies
DE1962156C (en) Radio receiver for single sideband reception
DE69603973T2 (en) ELIMINATION CIRCUIT AND METHOD FOR RESIDUAL SIGNALS FROM SQUARE SIGNAL MODULATORS / DEMODULATORS
DE2354146A1 (en) Oscillator with phase control for output frequency - has fixed frequency oscillator whose frequency differs from the output frequency
AT242234B (en) Switching arrangement for the measurement of transit time curves
DE960291C (en) Transmitter for the optional transmission of single sideband telephony and frequency-keyed telegraphy
DE655255C (en) Homodyne receiver
DE820904C (en) Transmitter with high frequency constancy
DE2508539C3 (en) Landing course transmitter or glide slope transmitter for the instrument landing system
DE19654740A1 (en) Four pole analysis method with high bandwidth for frequencies to 50 GHz