EP2017874A2 - Configuration de tube à ondes progressives - Google Patents

Configuration de tube à ondes progressives Download PDF

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Publication number
EP2017874A2
EP2017874A2 EP08104696A EP08104696A EP2017874A2 EP 2017874 A2 EP2017874 A2 EP 2017874A2 EP 08104696 A EP08104696 A EP 08104696A EP 08104696 A EP08104696 A EP 08104696A EP 2017874 A2 EP2017874 A2 EP 2017874A2
Authority
EP
European Patent Office
Prior art keywords
lines
vacuum
arrangement according
line
decoupling
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.)
Granted
Application number
EP08104696A
Other languages
German (de)
English (en)
Other versions
EP2017874B1 (fr
EP2017874B8 (fr
EP2017874A3 (fr
Inventor
Wolfgang DÜRR
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.)
Thales Air Systems and Electron Devices GmbH
Original Assignee
Thales Electron Devices 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 Thales Electron Devices GmbH filed Critical Thales Electron Devices GmbH
Publication of EP2017874A2 publication Critical patent/EP2017874A2/fr
Publication of EP2017874A3 publication Critical patent/EP2017874A3/fr
Publication of EP2017874B1 publication Critical patent/EP2017874B1/fr
Application granted granted Critical
Publication of EP2017874B8 publication Critical patent/EP2017874B8/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/40—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
    • H01J23/42—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit the interaction circuit being a helix or a helix-derived slow-wave structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps

Definitions

  • the invention relates to a traveling-wave tube arrangement with a delay line surrounded by a vacuum envelope and a decoupling arrangement.
  • Wanderfeldröhren contain within a vacuum envelope a delay line, which is typically designed as a helical line or, in particular for higher frequencies than multiply deflected waveguide structure.
  • An electron beam guided in a magnetic field and propagating along the delay line in the high vacuum present within the vacuum envelope interacts with a radio frequency (RF) signal injected on an input side of the delay line, the radio frequency signal being an amplified RF output signal on an output side of the delay line can be tapped off and decoupled by means of a decoupling device through the vacuum envelope to an output circuit arranged outside this, for example an antenna arrangement.
  • the decoupling assembly includes a decoupling line and, when passing through the vacuum envelope, a seal n the shape of a dielectric material called a vacuum window.
  • the high-frequency decoupling line is usually designed as a coaxial line, but can also be formed by a waveguide.
  • the high-frequency decoupling line With increasing output power of the RF output signal occur higher electric fields, eg. B. between the inner conductor and outer sheath of a coaxial line, which can lead to unwanted secondary electron emission by so-called multipaction or field flashovers in the form of a so-called corona.
  • Such effects can lead to errors in the RF output signal or, in the worst case, to the destruction of the tube.
  • the present invention has for its object to provide a traveling wave tube arrangement in which the risk of said disturbing effects at higher output power is reduced.
  • the partial services which are decoupled via the multiple decoupling lines are advantageously the same size.
  • exactly two coupling lines are provided, which are passed through in each case one of two separate vacuum windows.
  • the distribution of the total output power of the tubes to partial powers is advantageously carried out by means of a power divider arrangement with an input port at the output of the delay line and a plurality of decoupled output ports.
  • the branch lines advantageously form transformation lines in the form of quarter wavelength lines at the operating frequency in a manner known per se. Due to the terminating resistor, the two output ports are decoupled from each other.
  • An impedance matching between the characteristic impedance of the delay line and the characteristic impedance of an external circuit connected to the output ports of the divider is advantageously possible at the same time via the branch lines.
  • the output ports of the divider and the terminating resistor are advantageously outside the vacuum envelope.
  • the transformation lines, including the vacuum windows, are part of the coupling-out arrangement.
  • the delay line advantageously has a low-pass characteristic and is preferably designed in a manner known per se as a helical line or a ring-land line.
  • the RF decoupling lines are advantageously carried out at least partially, in particular on a delay line facing portion in coaxial and galvanically connected to the delay line in particular one of the aforementioned types.
  • the coupling lines can be designed completely as coaxial lines.
  • a mixed form of coaxial line and waveguide be provided, in particular in such a way that an initial portion of the coupling line is carried out in coaxial technology, which is followed by a waveguide section, wherein advantageously the dielectric vacuum window is arranged in the region of the waveguide section.
  • the coupling lines of Auskoppelan extract are advantageously carried out in coaxial technology.
  • the invention is particularly advantageous at an operating frequency of the traveling-wave tube arrangement in a range below 8 GHz.
  • the decoupled via the separate coupling lines part services can be brought together again in an external circuit in an advantageous embodiment, so that as in the case of decoupling via only one decoupling line, the entire output power is available for an application.
  • the separately decoupled part services can also be used separately and z. B. transmit power for two separate RF antennas.
  • Fig. 1 is denoted VL a delay line, in particular a helical line, which has a characteristic impedance ZL.
  • a decoupling point AP of the delay line is connected to the input port TE of a Wilkinson divider WT.
  • Output gates T1, T2 of the Wilkinson divider each have one Characteristic impedance ZO, which in particular may be 50 ohms according to the value customary in HF applications.
  • the two output ports T1, T2 are connected to one another via a terminating resistor AW, which is preferably designed as a real resistor to a value 2 ZO.
  • the branch lines L1, L2 connecting the input port to the output ports in a Wilkinson divider are designed as quarter wavelength lines and advantageously also serve to transform the characteristic impedance Z1 of the delay line VL on the characteristic impedance ZO to the output ports ZO.
  • the branch lines have this z.
  • the branch lines L1, L2 are guided in vacuum windows F1, F2 of dielectric material through the vacuum envelope HU.
  • the helical line VL and the input port TE of the divider are located in a high vacuum area VA surrounded by a vacuum envelope HU.
  • the output ports T1, T2 and the terminating resistor AW are preferably located outside the vacuum envelope HU in the ambient pressure PU.
  • each of the two branch lines L1, L2 half of the entire output line is coupled out and fed to an external circuit AB, which in particular can contain an HF antenna arrangement.
  • the decoupled via the coupling lines L1, L2 through the vacuum envelope and at the output ports T1, T2 available part services can be summarized in the outer circuit again and further processed together, z. B. as a single feed power for an antenna.
  • the partial outputs available at the output ports T1, T2 can also be processed separately in the external circuit be, for. B. as a power supply for two separate sub-antennas or antenna elements of an antenna array.
  • Fig. 2 schematically shows an advantageous embodiment of the output range of a traveling wave tube arrangement with a Wilkinson divider in coaxial design.
  • Two coaxial lines K1, K2 are passed through the vacuum envelope, wherein the passages of the coaxial K1, K2 are formed by the vacuum envelope in a conventional manner so that dielectric vacuum windows F1, F2 between outer conductor LA and inner conductor LI of the coaxial conductor are inserted and the outer conductor are tightly connected to the vacuum envelope.
  • the transformation lines of the divider are then implemented in mixed technique.
  • the inner conductors of the coaxial lines K1, K2 are connected to each other within the vacuum envelope at the input port and to the delay line VL.
  • the decoupled signals on the two coaxial lines K1, K2 are in phase.
  • the inner conductors of the coaxial lines outside the vacuum envelope HU which form the transformation lines of the Wilkinson divider, the inner conductors of which are connected to one another via a real terminating resistor AW at the ends facing away from the input gate or the delay line.

Landscapes

  • Microwave Tubes (AREA)
  • Waveguide Aerials (AREA)
EP20080104696 2007-07-18 2008-07-10 Configuration de tube à ondes progressives Ceased EP2017874B8 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710033823 DE102007033823B3 (de) 2007-07-18 2007-07-18 Wanderfeldröhrenanordnung

Publications (4)

Publication Number Publication Date
EP2017874A2 true EP2017874A2 (fr) 2009-01-21
EP2017874A3 EP2017874A3 (fr) 2010-02-24
EP2017874B1 EP2017874B1 (fr) 2012-09-12
EP2017874B8 EP2017874B8 (fr) 2012-10-24

Family

ID=39790817

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080104696 Ceased EP2017874B8 (fr) 2007-07-18 2008-07-10 Configuration de tube à ondes progressives

Country Status (2)

Country Link
EP (1) EP2017874B8 (fr)
DE (1) DE102007033823B3 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1675150A2 (fr) 2004-12-24 2006-06-28 E2V Technologies (UK) Limited Arrangement de sortie pour un tube à faisceau d'électrons

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3527555A1 (de) * 1985-08-01 1987-02-12 Rohde & Schwarz Schaltung zum entkoppelten zusammenfuehren der ausgangsleistungen mehrerer hochfrequenz-leistungssender
US5038076A (en) * 1989-05-04 1991-08-06 Raytheon Company Slow wave delay line structure having support rods coated by a dielectric material to prevent rod charging
DE19860379A1 (de) * 1998-12-28 2000-07-06 Bosch Gmbh Robert Leistungsteiler für Hochfrequenzsignale

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1675150A2 (fr) 2004-12-24 2006-06-28 E2V Technologies (UK) Limited Arrangement de sortie pour un tube à faisceau d'électrons

Also Published As

Publication number Publication date
DE102007033823B3 (de) 2009-01-08
EP2017874B1 (fr) 2012-09-12
EP2017874B8 (fr) 2012-10-24
EP2017874A3 (fr) 2010-02-24

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