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Recent content by jarys

  1. J

    flexible coaxial cable

    Where I find flexible coaxial cable ? impedance 10- 25 Ohm PTFE
  2. J

    What to use to build a transistor driver to BLF647

    Re: transistor-advice The amplifier will be use with 16-QAM modulation (require high performance -IMD) transistors BLF542 or BLF404 ??? Do you have vfone some measurements data IMD ???
  3. J

    Where can I find the rf transistor for 100-500MHz amp??

    I wont to bild amplifier P1dB=100W, I choose BLF647 as the last stage. Which transistor I should use in odd stage to reach the best result? I know firm: freescale,polyfet,cree,macom,semelab,nxp Are some else??
  4. J

    What to use to build a transistor driver to BLF647

    I want to make to transistor driver to BLF647 in <100MHz-500MHz>. What I should use ?
  5. J

    Where can I find the rf transistor ??

    Transitor works in amplifier <100-500MHz>, Idq~1.3A @28V Who produces this transistor ??
  6. J

    A Novel C-Band 580W SSPA for Microwave Satellite Communications Earth Station

    A Novel C-Band 580W SSPA for Microwave Satellite Communications Earth Station Masatoshi, Ishida; Noboru, Komatsu; Kenzo, Wada; Yoshiaki, Doi; Masayuki, Kumura; Eiji, Fujiwara; Keiichi, Umezu; Sumio, Ueda; Daisuke, Kawaguchi; European Microwave Conference, 1997. 27th Volume 2, Oct. 1997...
  7. J

    Looking for TRF2432 IC

    Hallo !! I am looking for to TRF2432 similar IC I want to make complete transceiver ISM 5GHz thanks
  8. J

    How to design a resistant amplifier on short and open () ?

    how to design resistant amplifier on short and open () frequency band 100 -500 MHz power 80W Thanks!
  9. J

    Help me select transistors for 200-400 MHz amplifier

    I want to make about following parameters amplifier : G 40dB P1dB 44dBm gangs 200-400MHz Class AB I need relating information: - the influence of temperature on parameters the VDMOS, LDMOS. - the selection of transistors (what firm ???) - on what was one should be...
  10. J

    LDMOS RF Power Amplifier Bias Controller

    Is bias control necessarily in amplifier with LDMOS ?? How is the large influence of temperature on parameters in amplifiers with transistors LDMOS ?? thanks for information
  11. J

    Documents about transistors from polyfet.com

    Is Someone built amplifiers with transistors of firm **broken link removed**??? Is she credible... Is her transistors have good repeatability ??? Thanks for informations.
  12. J

    VDMOS_LDMOS_parameters(T[K])

    I need the papers and information about parameters the amplifiers with transistors VDMOS, LDMOS versus temperature.(G[T],POUT[T], Idq[T],...). thanks.
  13. J

    I need two papers about Transmission Line Transformers

    [1] E. Rotholz, "Transmission-line transformers," IEEE Transactions on Microwave Theory and Technology, Vol. MTT- 29, No.4, April 1981, pp. 327-331. [2] Jerry Sevick, Transmission Line Transformers, 2nd Ed., American Radio Relay League, Newington, CT, 1990. thanks !!!
  14. J

    Examples, models and articles about wideband amplifiers

    Hi. Does anyone have some example simulations in M/W/O, ADS or materials, of wideband amplifiers for frequency around 200-400 MHz ? Maybe someone has got some experience in design of such amplifiers? I want to design such amplifier. It has to fulfil following requirements: frequency...
  15. J

    S - parametres measurement

    Hi !! I want to build the kalibrations kit to measurement of elements the R,L,C, transistors.(with the help of Vector Network Analyzers) I need on subject theoretical and practical hands their realization. I ask about materials in electronic form. thanks.
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