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EP2035839A1 - Arrangement for determining the operational characteristics of a high-frequency power amplifier - Google Patents

Arrangement for determining the operational characteristics of a high-frequency power amplifier

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Publication number
EP2035839A1
EP2035839A1 EP07725767A EP07725767A EP2035839A1 EP 2035839 A1 EP2035839 A1 EP 2035839A1 EP 07725767 A EP07725767 A EP 07725767A EP 07725767 A EP07725767 A EP 07725767A EP 2035839 A1 EP2035839 A1 EP 2035839A1
Authority
EP
European Patent Office
Prior art keywords
complex
voltage
computer
arrangement according
power amplifier
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.)
Ceased
Application number
EP07725767A
Other languages
German (de)
French (fr)
Inventor
Daniel HÖBEL
Hendrik Köhler
Bernd Weigenthaler
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.)
Rohde and Schwarz GmbH and Co KG
Original Assignee
Rohde and Schwarz GmbH and Co KG
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 Rohde and Schwarz GmbH and Co KG filed Critical Rohde and Schwarz GmbH and Co KG
Publication of EP2035839A1 publication Critical patent/EP2035839A1/en
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
    • G01R31/2822—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere of microwave or radiofrequency circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/04—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant in circuits having distributed constants, e.g. having very long conductors or involving high frequencies

Definitions

  • the invention relates to an arrangement according to the preamble of the main claim.
  • Adjustment of the load and the power to determine and monitor For this purpose, from DE 27 10 752 Al or DE 39 18 159 Al various analog arrangements according to the preamble of the main claim known. They have in common that for determining the operating characteristics on the connecting line between the power amplifier and antenna directional couplers are used and the calculation of the desired operating characteristics of the means obtained by the directional coupler analog forward or reverse voltage, respectively the leading or returning wave on the Connection line is proportional, carried out in an analogous manner by correspondingly complex analog circuits.
  • complex analog measurement voltages obtained in this way are digitized according to the invention and from these digital values the various desired operating parameters such as complex forward or reverse voltage, complex forward and reverse power, the complex load impedance of the antenna, the Reflection factor or the ripple factor on the generally formed as a coaxial line connecting line between the output of the high-frequency power amplifier and the antenna can be calculated using well-known algorithms.
  • the digitized measuring voltage proportional to the complex voltage on the line can be digitally demodulated, namely according to the demodulation mode which corresponds to the modulation mode in the generation of the high-frequency signal amplified by the power amplifier, thus for example an amplitude modulation. Frequency or phase modulation or any other higher-order modulation.
  • the thus digitally demodulated useful signal at the output of the power amplifier can then for qualitative Judgment of the output signal fed back to the input of the radio system and made audible there, for example by means of a Mit Anlagenlaut Maschineners.
  • a so-called side-tone signal can be generated, with the speech comfort, for example, a
  • Shortwave telephony radio system can be monitored and improved. This possibility of feedback of one's own language is superior to the previously used direct feedback to the microphone amplifier on a monitoring loudspeaker, since all levels of the radio system including power amplifier are judged with. This possibility of demodulating the useful signal directly at the base of the antenna can just as well be used in CW operation or in the transmission of digital signals for monitoring in an advantageous manner.
  • Another possibility is to determine from the digital values supplied to the computer, which correspond to the complex supply voltage, the distortion of the output stage which arises due to non-linearity.
  • the useful signal supplied to the power amplifier can be pre-distorted in the opposite direction to the distortion before the amplification in a known manner, so that thus the distortions in the power amplifier are compensated.
  • This determination of the distortion in the output stage can also be constantly monitored during operation, so that even with a change in the load, for example, turning on another antenna or a frequency change, the system is automatically linearized via a corresponding change in the predistortion.
  • Fig. 1 shows the block diagram of a shortwave power amplifier with the development of the invention.
  • FIG. 1 shows the block diagram of a shortwave power output stage with an RF power amplifier 1 to which the useful signal to be amplified from a control and modulation device 2 is supplied.
  • the output of the power amplifier 1 feeds via a coaxial connection line 3, an antenna 4.
  • the outer conductor is interrupted and via a directly on the inner conductor of the coaxial line 3 connected capacitive voltage divider 5 Buschbeck is one of the complex voltage U proportional measurement voltage U u , which is digitized in an A / D converter 6 and fed to a computer 7.
  • a measurement voltage Ui corresponding to the complex current I on the line is obtained at a resistor, the analog measurement value -Ui is determined via an A / D converter 9 and the measured value + Ui is determined via an A.
  • / D converter 10 is supplied to the computer 7. After the two obtained voltage values + Ui and -Ui are perpendicular to each other, possibly only a single A / D converter 9 or 10 can be used and the corresponding other value can then be calculated directly in the computer 7, so that an A / D Converter is saved.
  • the computer 7 is for example an FPGA calculator.
  • the complex forward voltage according to relationship (1) or the complex return voltage can be calculated according to relationship (2) or according to relationship (3) the complex supply power or after (4) the return power.
  • Another possibility according to relationship (5) is to calculate the complex load impedance Z from these voltages.
  • the power consumption, intermodulation and / or the harmonic distance can then be improved, for example, by adaptively turning different length 50 ohms line pieces between power amplifier 1 and antenna 4, as the complex adjustment can be optimized by the switched-line pieces so that Power amplifier is operated in an optimal adjustment range.
  • a low-pass character can be generated and worked in a capacitive range, so that the harmonic separation is improved.
  • the gain can be optimized so that the power amplifier can be better adapted to its scattering parameters. In this way, the efficiency of the power amplifier can thus be optimized by calculating the complex load impedance.
  • the invention is not limited to the embodiment described. All described or drawn elements can be combined with each other. Also, a digital demodulation of the useful signal, as described above, possible, as well as the determination of the distortion of the amplifier and the resulting possible linearization by appropriate predistortion of the input signal.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Amplifiers (AREA)

Abstract

In order to determine the operational characteristics of a HF power amplifier (1) (e.g. complex forward and reflected voltage, and/or power, complex load impedance, the reflection factor or the ripple factor) on a connection line (3) between the outlet of the HF power amplifier (1) and a complex load (4), in particular an antenna (4), an analog measurement voltage Uu that is proportional to the complex voltage U on the connection line, and an analog measurement voltage Ui that is proportional to the complex current I on the connection line (3) are determined by means of a Buschbeck coupling device. Said measurement voltages are digitalised and said digital values enable the desired operational characteristics to be calculated in a computer (7).

Description

Anordnung zum Bestimmen der Betriebskenngrößen eines Hochfrequenz-Leistungsverstärkers Arrangement for determining the operating characteristics of a high-frequency power amplifier

Die Erfindung betrifft eine Anordnung laut Oberbegriff des Hauptanspruches.The invention relates to an arrangement according to the preamble of the main claim.

Beim Betrieb von Hochfrequenz-Leistungsverstärkern, beispielsweise Transistor-Leistungsendstufen frequenzvariabler Kurzwellen-Sender, ist es erforderlich, verschiedene Betriebskenngrößen, insbesondere dieIn the operation of high-frequency power amplifiers, such as transistor power amplifiers frequency-variable shortwave transmitter, it is necessary to different operating characteristics, in particular the

Anpassung der Last und die Leistung zu bestimmen und zu überwachen. Dazu sind aus der DE 27 10 752 Al bzw. DE 39 18 159 Al verschiedene analoge Anordnungen laut Oberbegriff des Hauptanspruches bekannt. Ihnen ist gemeinsam, dass zur Bestimmung der Betriebskenngrößen auf der Verbindungsleitung zwischen Leistungsverstärker und Antenne Richtkoppler verwendet werden und die Berechnung der gewünschten Betriebskenngrößen aus der mittels der Richtkoppler gewonnen analogen Vorwärts- bzw. Rückwärts- Spannung, die jeweils der vorlaufenden bzw. rücklaufenden Welle auf der Verbindungsleitung proportional ist, auf analoge Weise durch entsprechend aufwendige Analogschaltungen erfolgt.Adjustment of the load and the power to determine and monitor. For this purpose, from DE 27 10 752 Al or DE 39 18 159 Al various analog arrangements according to the preamble of the main claim known. They have in common that for determining the operating characteristics on the connecting line between the power amplifier and antenna directional couplers are used and the calculation of the desired operating characteristics of the means obtained by the directional coupler analog forward or reverse voltage, respectively the leading or returning wave on the Connection line is proportional, carried out in an analogous manner by correspondingly complex analog circuits.

Es ist Aufgabe der Erfindung, eine Anordnung dieser Art zu schaffen, mit welcher diese Bestimmung derIt is an object of the invention to provide an arrangement of this kind, with which this provision of

Betriebskenngrößen eines Hochfrequenz-Leistungsverstärkers genauer und auf wesentlich einfachere und preiswertere Weise möglich ist.Operating characteristics of a high-frequency power amplifier is more accurate and in a much simpler and cheaper way possible.

Diese Aufgabe wird ausgehend von einer Anordnung laut Oberbegriff des Anspruchs 1 durch dessen kennzeichnende Merkmale gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.This object is achieved on the basis of an arrangement according to the preamble of claim 1 by its characterizing features. Advantageous developments emerge from the subclaims.

Gemäß der Erfindung wird für die Gewinnung der zur Berechnung der gewünschten Betriebskenngrößen erforderlichen Messgrößen auf der Verbindungsleitung zwischen Leistungsverstärker und Antenne eine an sich bekannte Koppeleinrichtung nach BuschbeckAccording to the invention, for the acquisition of the parameters required for calculating the desired operating characteristics on the connecting line between the power amplifier and the antenna is a per se Known coupling device to Buschbeck

(Meinke/Grundlach, Taschenbuch der Hochfrequenztechnik, 3. Auflage, Seiten 1560-1561) benutzt, die den Vorteil besitzt, dass unabhängig vom Ort ihrer Einbaustelle auf der Leitung Messspannungen gewonnen werden, die der komplexen Spannung bzw. dem komplexen Strom auf der Leitung proportional sind.(Meinke / Grundlach, Taschenbuch der Hochfrequenztechnik, 3rd edition, pages 1560-1561) used, which has the advantage that regardless of the location of their installation point on the line measuring voltages are obtained, the complex voltage or the complex current on the line are proportional.

Diese so gewonnenen komplexen analogen Messspannungen werden gemäß der Erfindung digitalisiert und aus diesen Digitalwerten können dann in einem Rechner die verschiedenen gewünschten Betriebskenngrößen wie komplexe Vorwärts- bzw. Rückwärt-Spannung, komplexe Vorwärts- bzw. Rückwärts-Leistung, die komplexe Lastimpedanz der Antenne, der Reflexionsfaktor bzw. der Welligkeitsfaktor auf der im allgemeinen als Koaxialleitung ausgebildeten Verbindungsleitung zwischen Ausgang des Hochfrequenz- Leistungsverstärkers und der Antenne unter Anwendung entsprechend bekannter Algorithmen berechnet werden.These complex analog measurement voltages obtained in this way are digitized according to the invention and from these digital values the various desired operating parameters such as complex forward or reverse voltage, complex forward and reverse power, the complex load impedance of the antenna, the Reflection factor or the ripple factor on the generally formed as a coaxial line connecting line between the output of the high-frequency power amplifier and the antenna can be calculated using well-known algorithms.

Mit der erfindungsgemäßen Anordnung können nicht nur die beispielhaft erwähnten oben genannten Betriebskenngrößen eines HF-Leistungsverstärkers bestimmt werden, sondern mit den dem Rechner zur Verfügung gestellten Digitalwerten können unter Benutzung entsprechend bekannter Algorithmen auch noch andere Berechnungen durchgeführt werden, die für den Betrieb des Leistungsverstärkers von Nutzen sind. So kann beispielsweise mittels eines bekannten Algorithmus die der komplexen Spannung auf der Leitung proportionale digitalisierte Messspannung digital demoduliert werden, und zwar nach demjenigen Demodulations-Modus, der dem Modulations-Modus bei der Erzeugung des über den Leisungsverstärker verstärkten Hochfrequenzsignals entspricht, also beispielsweise eine Amplitudenmodulation, Frequenz- oder Phasenmodulation oder eine beliebig andere höherwertige Modulationsart.With the arrangement according to the invention, not only the above-mentioned above-mentioned operating characteristics of an RF power amplifier can be determined, but with the digital values provided to the computer, other calculations can be performed using algorithms known in the art, which are useful for the operation of the power amplifier are. Thus, for example, by means of a known algorithm, the digitized measuring voltage proportional to the complex voltage on the line can be digitally demodulated, namely according to the demodulation mode which corresponds to the modulation mode in the generation of the high-frequency signal amplified by the power amplifier, thus for example an amplitude modulation. Frequency or phase modulation or any other higher-order modulation.

Das so digital demodulierte Nutzsignal am Ausgang des Leistungsverstärkers kann dann zur qualitativen Beurteilung des Ausgangssignals zum Eingang des Funksystems zurückgeführt und dort beispielsweise mittels eines Mithörlautsprechers hörbar gemacht werden. Auf diese Weise kann ein so genanntes Side-Tone-Signal erzeugt werden, mit dem der Sprechkomfort beispielsweise einesThe thus digitally demodulated useful signal at the output of the power amplifier can then for qualitative Judgment of the output signal fed back to the input of the radio system and made audible there, for example by means of a Mithörlautsprechers. In this way, a so-called side-tone signal can be generated, with the speech comfort, for example, a

Kurzwellen-Telefonie-Funksystems überwacht und verbessert werden kann. Diese Möglichkeit der Rückmeldung der eigenen Sprache ist den bisher verwendeten unmittelbaren Rückführungen nach dem Mikrofonverstärker auf einen Mithörlautsprecher überlegen, da ja sämtliche Stufen des Funksystems einschließlich Endverstärker mit beurteilt werden. Diese Möglichkeit der Demodulation des Nutzsignals unmittelbar am Fußpunkt der Antenne kann genauso gut bei CW-Betrieb bzw. bei der Übertragung von Digitalsignalen in vorteilhafter Weise zur Überwachung angewendet werden.Shortwave telephony radio system can be monitored and improved. This possibility of feedback of one's own language is superior to the previously used direct feedback to the microphone amplifier on a monitoring loudspeaker, since all levels of the radio system including power amplifier are judged with. This possibility of demodulating the useful signal directly at the base of the antenna can just as well be used in CW operation or in the transmission of digital signals for monitoring in an advantageous manner.

Eine andere Möglichkeit besteht darin, aus den dem Rechner zugeführten Digitalwerten, die der komplexen Vorlaufspannung entsprechen, die durch Nichtlinearität entstehenden Verzerrungen der Endstufe zu bestimmen. Damit kann das dem Leistungsverstärker zugeführte Nutzsignal vor der Verstärkung in bekannter Weise gegenläufig zur Verzerrung vorverzerrt werden, so dass damit die Verzerrungen im Leistungsverstärker kompensiert werden. Diese Bestimmung der Verzerrung in der Endstufe kann auch während des Betriebs ständig überwacht werden, so dass auch bei einer Veränderung der Last, beispielsweise dem Anschalten einer anderen Antenne oder bei einem Frequenzwechsel, über eine entsprechende Änderung der Vorverzerrung das System selbstständig linearisiert wird.Another possibility is to determine from the digital values supplied to the computer, which correspond to the complex supply voltage, the distortion of the output stage which arises due to non-linearity. Thus, the useful signal supplied to the power amplifier can be pre-distorted in the opposite direction to the distortion before the amplification in a known manner, so that thus the distortions in the power amplifier are compensated. This determination of the distortion in the output stage can also be constantly monitored during operation, so that even with a change in the load, for example, turning on another antenna or a frequency change, the system is automatically linearized via a corresponding change in the predistortion.

Als Rechner eignet sich jeder übliche Signalprozessor oder für spezielle Aufgaben ein so genanntes FPGA (Field Programmable Gate Aray) , mit dem beispielsweise nach dem so genannten Cordic-Algorithmus die oben beschriebenen digitalen Berechnungen mit geringstem Aufwand berechnet werden können. Die Erfindung wird im folgenden anhand einer schematischen Zeichnung und beispielhaften Berechnungsformeln (1) bis (7) an Ausführungsbeispielen näher erläutert. In der Zeichnung zeigt:Any conventional signal processor or, for special tasks, a so-called FPGA (Field Programmable Gate Array) is suitable as the computer, with which, for example, the so-called Cordic algorithm can be used to calculate the above-described digital calculations with minimal effort. The invention is explained in more detail below with reference to a schematic drawing and exemplary calculation formulas (1) to (7) of exemplary embodiments. In the drawing shows:

Fig. 1 das Prinzipschaltbild einer Kurzwellen- Leistungsendstufe mit der erfindungsgemäßen Weiterbildung .Fig. 1 shows the block diagram of a shortwave power amplifier with the development of the invention.

Die Fig. 1 zeigt das Prinzipschaltbild einer Kurzwellen- Leistungsendstufe mit einem HF-Leistungsverstärker 1, dem das zu verstärkende Nutzsignal aus einer Steuer- und Modulationseinrichtung 2 zugeführt wird. Der Ausgang des Leistungsverstärkers 1 speist über eine koaxial Verbindungsleitung 3 eine Antenne 4. An einer beliebigen Stelle dieser Verbindungsleitung 3 ist der Außenleiter unterbrochen und über einen unmittelbar am Innenleiter der Koaxialleitung 3 angeschalteten kapazitiven Spannungsteiler 5 wird nach Buschbeck eine der komplexen Spannung U proportionale Messspannung Uu gewonnen, die in einem A/D-Wandler 6 digitalisiert und einem Rechner 7 zugeführt wird. Mittels eines dem Innenleiter der Koaxialleitung 3 zugeordneten Stromwandlers 8 wird an einem Widerstand eine dem komplexen Strom I auf der Leitung entsprechende Messspannung Ui gewonnen, der analoge Messwert -Ui wird über einen A/D-Wandler 9 und der Messwert +Ui wird über einen A/D-Wandler 10 dem Rechner 7 zugeführt. Nachdem die beiden gewonnenen Spannungswerte +Ui und -Ui zueinander senkrecht stehen, kann gegebenenfalls auch nur ein einziger A/D-Wandler 9 oder 10 benutzt werden und der entsprechende andere Wert kann dann unmittelbar im Rechner 7 berechnet werden, sodass ein A/D- Wandler eingespart wird. Der Rechner 7 ist beispielsweise ein FPGA-Rechenwerk.1 shows the block diagram of a shortwave power output stage with an RF power amplifier 1 to which the useful signal to be amplified from a control and modulation device 2 is supplied. The output of the power amplifier 1 feeds via a coaxial connection line 3, an antenna 4. At any point of this connection line 3, the outer conductor is interrupted and via a directly on the inner conductor of the coaxial line 3 connected capacitive voltage divider 5 Buschbeck is one of the complex voltage U proportional measurement voltage U u , which is digitized in an A / D converter 6 and fed to a computer 7. By means of a current transformer 8 assigned to the inner conductor of the coaxial line 3, a measurement voltage Ui corresponding to the complex current I on the line is obtained at a resistor, the analog measurement value -Ui is determined via an A / D converter 9 and the measured value + Ui is determined via an A. / D converter 10 is supplied to the computer 7. After the two obtained voltage values + Ui and -Ui are perpendicular to each other, possibly only a single A / D converter 9 or 10 can be used and the corresponding other value can then be calculated directly in the computer 7, so that an A / D Converter is saved. The computer 7 is for example an FPGA calculator.

Im Rechner 7 können nun nach bekannten Formeln der Leitungstheorie, wie sie beispielsweise in dem Lehrbuch von Meinke/Grundlach, Taschenbuch der Hochfrequenztechnik beschrieben sind, aus den digitalisierten Spannungen Uu bzw. U1, die den komplexen Spannungen U bzw. des Stromes I auf der Leitung proportional sind und bei denen die Phaseninformationen der komplexen Spannung bzw. Strom auch nach Digitalisierung erhalten bleiben, die verschiedenartigsten Betriebsgroßen desIn the computer 7 can now according to known formulas of the theory of conduct, as described for example in the textbook of Meinke / Grundlach, paperback of high-frequency technology, from the digitized voltages U u or U 1 , which are proportional to the complex voltages U and the current I on the line and in which the phase information of the complex voltage or current remain even after digitization, the most diverse operating variables of

Leistungsverstarkers 1 bestimmt werden. Die Proportionalitat zwischen den Spannungen Ua und U1 und den komplexen Großen Ö und / ist jeweils durch Proportionalitatsfaktoren k bzw. m berücksichtigt, die entweder empirisch durch Messung oder durch Simulation ermittelt werden.Leistungsverstarkers 1 are determined. The proportionality between the voltages U a and U 1 and the complex variables Ö and / is taken into account in each case by proportionality factors k and m, which are determined either empirically by measurement or by simulation.

So kann beispielsweise aus den digitalisierten Spannungswerten Uu und U1 die komplexe VorlaufSpannung gemäß Beziehung (1) bzw. die komplexe RucklaufSpannung laut Beziehung (2) berechnet werden oder nach Beziehung (3) die komplexe Vorlaufleistung bzw. nach (4) die Rucklaufleistung. Eine andere Möglichkeit besteht nach Beziehung (5) darin, aus diesen Spannungen die komplexe Lastimpedanz Z zu berechnen. Mit dieser damit bekannten komplexen Lastimpedanz kann dann beispielsweise durch adaptives Einschalten verschieden langer 50 Ohm Leitungsstucke zwischen Leistungsverstarker 1 und Antenne 4 die Leistungsaufnahme, Intermodulation und/oder der Oberwellenabstand verbessert werden, da durch die eingeschalteten Leitungsstucke die komplexe Anpassung so optimiert werden kann, dass der Leistungsverstarker in einem optimalen Anpassungsbereich betrieben wird. Auf diese Weise kann beispielsweise ein Tiefpasscharakter erzeugt und in einem kapazitiven Bereich gearbeitet werden, sodass der Oberwellenabstand verbessert wird. Auch die Verstärkung kann so optimiert werden, da der Leistungsverstarker besser an seine Streuparameter angepasst werden kann. Auf diese Weise kann also über die Berechnung der komplexen Lastimpedanz der Wirkungsgrad des Leistungsverstarkers optimiert werden.Thus, for example, from the digitized voltage values U u and U 1 the complex forward voltage according to relationship (1) or the complex return voltage can be calculated according to relationship (2) or according to relationship (3) the complex supply power or after (4) the return power. Another possibility according to relationship (5) is to calculate the complex load impedance Z from these voltages. With this known complex load impedance, the power consumption, intermodulation and / or the harmonic distance can then be improved, for example, by adaptively turning different length 50 ohms line pieces between power amplifier 1 and antenna 4, as the complex adjustment can be optimized by the switched-line pieces so that Power amplifier is operated in an optimal adjustment range. In this way, for example, a low-pass character can be generated and worked in a capacitive range, so that the harmonic separation is improved. Also, the gain can be optimized so that the power amplifier can be better adapted to its scattering parameters. In this way, the efficiency of the power amplifier can thus be optimized by calculating the complex load impedance.

Aus den digitalisierten Spannungswerten kann nach Beziehung (6) beispielsweise auch der komplexe Reflexionsfaktor r berechnet werden oder nach Beziehung (7) der Welligkeitsfaktor s (VSWR) .From the digitized voltage values, according to relationship (6), for example, also the complex Reflection factor r or according to relationship (7) the ripple factor s (VSWR).

Die Erfindung ist nicht auf das beschriebene Ausführungsbeispiel beschränkt. Alle beschriebenen oder gezeichneten Elemente sind beliebig miteinander kombinierbar. Auch eine digitale Demodulation des Nutzsignals ist, wie oben beschrieben, möglich, ebenso die Bestimmung der Verzerrungen des Verstärkers und die damit mögliche Linearisierung durch entsprechende Vorverzerrung des Eingangssignals. The invention is not limited to the embodiment described. All described or drawn elements can be combined with each other. Also, a digital demodulation of the useful signal, as described above, possible, as well as the determination of the distortion of the amplifier and the resulting possible linearization by appropriate predistortion of the input signal.

Claims

Ansprüche claims 1. Anordnung zum Bestimmen der Betriebs-Kenngrößen eines Hochfrequenz-Leistungsverstärkers, wie komplexe Vor- und Rücklauf-Spannung, komplexe Vor- und Rücklauf-Leistung, komplexe Lastimpedanz, Reflexionsfaktor oder Welligkeitsfaktor, auf der Verbindungsleitung (3) zwischen dem Ausgang des Leistungsverstärkers (1) und einer komplexen Last, insbesondere einer Antenne (4), dadurch gekennzeichnet, dass mittels einer Koppeleinrichtung (5, 8) ein der komplexen Spannung U auf der Verbindungsleitung (3) proportionale analoge Messspannung Uu und ein dem komplexen Strom / auf der Leitung (3) proportionale analoge Messspannung Ui ermittelt wird, diese1. Arrangement for determining the operating characteristics of a high-frequency power amplifier, such as complex forward and reverse voltage, complex forward and reverse power, complex load impedance, reflection factor or ripple factor, on the connecting line (3) between the output of the power amplifier ( 1) and a complex load, in particular an antenna (4), characterized in that by means of a coupling device (5, 8) one of the complex voltage U on the connecting line (3) proportional analog measuring voltage U u and the complex current / on the Line (3) proportional analog measuring voltage Ui is determined, this Messspannungen mittels Analog/Digital-Wandler (6, 9, 10) digitalisiert werden und aus diesen Digitalwerten in einem Rechner (7) die gewünschten Betriebskenngrößen berechnet werden.Measuring voltages are digitized by means of analog / digital converters (6, 9, 10) and from these digital values in a computer (7) the desired operating parameters are calculated. 2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass im Rechner (7) aus den digitalen Messspannungen die komplexe Vorlauf- und/oder Rücklauf- Spannung berechnet wird (Beziehungen 1 oder 2) .2. Arrangement according to claim 1, characterized in that in the computer (7) from the digital measuring voltages, the complex flow and / or return voltage is calculated (relations 1 or 2). 3. Anordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass im Rechner (7) aus den digitalen Messspannungen die komplexe Vorlauf- und/oder Rücklauf- Leistung berechnet wird (Beziehungen 3 oder 4) .3. Arrangement according to claim 1 or 2, characterized in that in the computer (7) from the digital measured voltages, the complex flow and / or return power is calculated (relations 3 or 4). 4. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass im Rechner (7) aus den digitalen Messspannungen die komplexe Impedanz der Last berechnet wird (Beziehung 5) .4. Arrangement according to one of the preceding claims, characterized in that in the computer (7) from the digital measuring voltages, the complex impedance of the load is calculated (relationship 5). 5. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass im Rechner (7) aus den digitalen Messspannungen der komplexe Reflexionsfaktor berechnet wird (Beziehung 6) .5. Arrangement according to one of the preceding claims, characterized in that in the computer (7) the complex reflection factor is calculated from the digital measured voltages (relationship 6). 6. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass im Rechner (7) aus den digitalen Messspannungen der6. Arrangement according to one of the preceding claims, characterized in that in the computer (7) from the digital measuring voltages of Welligkeitsfaktor berechnet wird (Beziehung 7) .Ripple factor is calculated (relationship 7). 7. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass im Rechner (7) aus der der komplexen Spannung U auf der Verbindungsleitung (3) proportionalen digitalen Messspannung nach dem Modulations-Modus, bei der Erzeugung des über den Leistungsverstärker (1) verstärkten HF- Signals verwendet wird, das HF-Signal digital demoduliert wird.7. Arrangement according to one of the preceding claims, characterized in that in the computer (7) from the complex voltage U on the connecting line (3) proportional digital measuring voltage according to the modulation mode, in the generation of the power amplifier (1) amplified RF signal is used, the RF signal is digitally demodulated. 8. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass im Rechner (7) aus den digitalen Messspannungen die komplexe VorlaufSpannung ermittelt und daraus nach bekannten Algorithmen die Verzerrung des Leistungsverstärkers ermittelt wird.8. Arrangement according to one of the preceding claims, characterized in that the complex forward voltage is determined in the computer (7) from the digital measured voltages and the distortion of the power amplifier is determined therefrom by known algorithms. 9. Anordnung nach Anspruch 8, dadurch gekennzeichnet, dass aus der ermittelten Verzerrung in bekannter Weise eine entsprechende Vorverzerrung für das zu verstärkende9. Arrangement according to claim 8, characterized in that from the determined distortion in a known manner, a corresponding predistortion for the amplified Hochfrequenz-Signal berechnet wird.High-frequency signal is calculated. 10. Anordnung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Koppeleinrichtung (5, 8) ein Koppler nach10. Arrangement according to one of claims 1 to 9, characterized in that the coupling device (5, 8) according to a coupler Buschbeck ist. Buschbeck is.
EP07725767A 2006-07-05 2007-06-01 Arrangement for determining the operational characteristics of a high-frequency power amplifier Ceased EP2035839A1 (en)

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DE102006031046A DE102006031046A1 (en) 2006-07-05 2006-07-05 Arrangement for determining the operating characteristics of a high-frequency power amplifier
PCT/EP2007/004887 WO2008003376A1 (en) 2006-07-05 2007-06-01 Arrangement for determining the operational characteristics of a high-frequency power amplifier

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IL196238A0 (en) 2009-09-22
US8219337B2 (en) 2012-07-10
AU2007271484B2 (en) 2010-12-23
US20090210180A1 (en) 2009-08-20
CN101467053B (en) 2011-11-23
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DE102006031046A1 (en) 2008-01-10
CN101467053A (en) 2009-06-24

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