WO2004040406A3 - Estimating the operating point on a nonlinear traveling wave tube amplifier - Google Patents

Estimating the operating point on a nonlinear traveling wave tube amplifier

Info

Publication number
WO2004040406A3
WO2004040406A3 PCT/US2003/033130 US0333130W WO2004040406A3 WO 2004040406 A3 WO2004040406 A3 WO 2004040406A3 US 0333130 W US0333130 W US 0333130W WO 2004040406 A3 WO2004040406 A3 WO 2004040406A3
Authority
WO
Grant status
Application
Patent type
Prior art keywords
operating point
twta
non
traveling wave
wave tube
Prior art date
Application number
PCT/US2003/033130
Other languages
French (fr)
Other versions
WO2004040406A2 (en )
Inventor
Ernest C Chen
Shamik Maitra
Original Assignee
Directv Group Inc
Ernest C Chen
Shamik Maitra
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

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/185Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851Systems using a satellite or space-based relay
    • H04B7/18515Transmission equipment in satellites or space-based relays

Abstract

A method, apparatus, article of manufacture, and a memory structure provide the ability to determine an input operating point and an output operating point on a non-linear traveling wave tube amplifier (TWTA). The non-linearity of the TWTA is measured (1302). An input roots mean-square (RMS) value of an input signal used to measure the non-linearity of the TWTA is computed (1304). The RMS value identifies an input operating point of the measured non-linearity of the TWTA. Lastly, an output operating point is obtained (1306).
PCT/US2003/033130 2001-04-27 2003-10-17 Estimating the operating point on a nonlinear traveling wave tube amplifier WO2004040406A3 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US09844401 US7209524B2 (en) 2001-04-27 2001-04-27 Layered modulation for digital signals
US10165710 US7778365B2 (en) 2001-04-27 2002-06-07 Satellite TWTA on-line non-linearity measurement
US42128902 true 2002-10-25 2002-10-25
US60/421,289 2002-10-25
US51036803 true 2003-10-10 2003-10-10
US60/510,368 2003-10-10

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CA 2503532 CA2503532C (en) 2002-10-25 2003-10-17 Estimating the operating point on a nonlinear traveling wave tube amplifier
EP20030777694 EP1563601B1 (en) 2002-10-25 2003-10-17 Estimating the operating point on a nonlinear traveling wave tube amplifier
US10532509 US7230480B2 (en) 2002-10-25 2003-10-17 Estimating the operating point on a non-linear traveling wave tube amplifier
DE2003631766 DE60331766D1 (en) 2002-10-25 2003-10-17 Estimate of the operating point of a non-linear propagation wave stir amplifier
US10962346 US7502430B2 (en) 2001-04-27 2004-10-08 Coherent averaging for measuring traveling wave tube amplifier nonlinearity
US10961579 US7502429B2 (en) 2003-10-10 2004-10-08 Equalization for traveling wave tube amplifier nonlinearity measurements

Publications (2)

Publication Number Publication Date
WO2004040406A2 true WO2004040406A2 (en) 2004-05-13
WO2004040406A3 true true WO2004040406A3 (en) 2004-07-22

Family

ID=32719427

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/033130 WO2004040406A3 (en) 2001-04-27 2003-10-17 Estimating the operating point on a nonlinear traveling wave tube amplifier

Country Status (1)

Country Link
WO (1) WO2004040406A3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005002207A1 (en) * 2004-11-26 2006-06-01 Rohde & Schwarz Gmbh & Co. Kg Method and system for determining the amplitude and / or phase of the output signal of a transmission link in dependence of the amplitude of the input signal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6177836B1 (en) * 1999-05-07 2001-01-23 The Aerospace Corporation Feed forward linearized traveling wave tube
US6369648B1 (en) * 1999-04-21 2002-04-09 Hughes Electronics Corporation Linear traveling wave tube amplifier utilizing input drive limiter for optimization

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6369648B1 (en) * 1999-04-21 2002-04-09 Hughes Electronics Corporation Linear traveling wave tube amplifier utilizing input drive limiter for optimization
US6177836B1 (en) * 1999-05-07 2001-01-23 The Aerospace Corporation Feed forward linearized traveling wave tube

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1563601A4 *

Also Published As

Publication number Publication date Type
WO2004040406A2 (en) 2004-05-13 application

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