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Recent content by ozenk

  1. O

    SHT11 Data to Serial Port Visual Basic .NET

    hi all... im developing student project about data acquisition from SHT11 Sensor (temp and hum), and i have develop the microntroller using AVR, in the program in AVR, i make statement if data from serialport = 1, then read temperatur else if data from serialport =2, then read humidity so i...
  2. O

    GPS application coded in C Language

    GPS in C Language hi all.. i want to design environment monitoring service,one of the sensor is GPS, now, i want connect GPS with Microconntroler, but i still problem with the language, i prefer to using C for all my sensor... does anyone have the C code for GPS... is it realizable if i...
  3. O

    Garmin USB (Can i Convert to Serial RS232)

    hi guys...i have Garmin but its USB connection and dont have Serial(RS232) connection, i doesnt considered about the connection, i think USB dan RS232 it not have any differences, USB is look easy, isnt? my problem is i want to connect my Garmin USB 18 to embedded computer which i can't install...
  4. O

    Hfff.....why Bf998 can be simulated in Multisim

    bf998 i'm now still design LNA for weather satellite reception (137.5 Mhz). some friends, suggest me to use multisim...but i cant simulate it.. i have been review many design about this LNA (maybe ten, i found in web), but i'm still confuse how to simulate it.. i have been build the model...
  5. O

    patch antenna parameters mesurements

    i dont know what you mean....you have been simulated in software or no?... you can use network analyzer and chamber room (just like room that isolated from external signal)...to get real VSWR and Return Loss and to know the real bandwith maybe you can contact university to tested it...
  6. O

    noise temperature for an amplifer - need help

    Re: noise temperature Te (noise temperature) = (Fn-1)To Fn = noise factor To = reference temperature Te = K To log-1[NF/10]-1 K is boltzman contant source: radio technician handbook may be it help you
  7. O

    How to design a microstirp dipole antenna.....

    i have been made microstrip folded dipole antena for TV reception, it very good for reception.. the method to make it only trial and error used microwave office.. i not found the formula to syntesis the width or the length.... i assume only when it need more bandwith and lower frequency it...
  8. O

    Advantages and Disadvantages Differential and Cascode LNA

    cascode lna hi Guys... im will design LNA for weather satellite (137 Mhz)..if i googling in the web it many design of this LNA...and mostly is only single stage and common-source configuration... why it doesnt design by differential or cascode.... is it any advantages or disadvantages of...
  9. O

    Want to manufate a wimax antenna operating at 2.5 GHz

    antenna design it easy if u use microstrip antenna,, you can simulate it in microwave office..great tools to make patch antenna.... spiral antena also good for your design....
  10. O

    when I can fabricate cheap microstrip circuits?

    yaps...you can outsourcing that in third world like indonesia, malaysia, and malaysia or India or China... it very cheap to fabricated the microstrip circuit because low cost worker...
  11. O

    Again! LNA Design with BF998

    bf998 spice model im undertsand what you mean... so im must use non linear model...i get it the file from NXP semiconductor.... it is just like in other thread in LNA .. * BF998 SPICE MODEL OCTOBER 1993 PHILIPS SEMICONDUCTORS * ENVELOPE SOT143 (R) * 1.: SOURCE; 2.: DRAIN; 3...
  12. O

    Again! LNA Design with BF998

    bf998 biasing yaps... i think, that the reason why it doesnt work with other frequency... but what you (vfone) mean about a simulation software...is you mean BF998 can not be simulate by ADS...because the paramater is specified at one bias point so whatever i configured the bias circuit, i...
  13. O

    Again! LNA Design with BF998

    bf998 lna thanks for the help... but i still confuse with this file paramater... i use in the ampliefier design guide > s-parameter in ADS, it doesnt work well. The noise figure not change when i use different frequency and voltage... my friends said that maybe the typical ofthe S...
  14. O

    Companies which offer online free sample ordering

    list of companies that are giving free samples i have sample from phillips (now NXP), i think if you explain with your purpose ecsply for education (final year project) you can easy to get it....but it depend on your dstributor, (maybe)....
  15. O

    Again! LNA Design with BF998

    bf998 hi everyone.. im designing using ADS but i cant locate s2p file... Does anyone have the s2p file for this transistor? thanks ozenk
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