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Type: Posts; User: guytoub

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  1. Replies
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    385

    Closed: Re: Bi-directional amplifier for Wi-Fi

    hello !


    thanks for your answer.

    i found this , https://www.qsl.net/n9zia/wireless/2.4amp-rfsense.html , and this is the same i wanted to do .
    what do you think about ?
  2. Replies
    6
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    385

    Closed: Bi-directional amplifier for Wi-Fi

    Hi everyone,

    I want to built a bidirectional amplifier for Wi-Fi and i'm looking for design schematic to do that.

    Thank you for your help


    regards
  3. Replies
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    519

    [SOLVED]Closed: Re: Good wire for small antenna

    Thanks Vfone for your answer , i tried to use this wire .
  4. Replies
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    519

    [SOLVED]Closed: Re: Good wire for small antenna

    Thanks
    But i’m looking for diameter about 1mm
  5. Replies
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    519

    [SOLVED]Closed: Good wire for small antenna

    Hello,

    i looking for the best wire to build wire antena like quadrifilar etc.
    i want the best reference for solid wire because the ones i found are too soft

    thanks
  6. Closed: monopole antenna Broadband impedance matching

    hi everybody!

    i want to know how i can make the passive impedance matching of a monopole antenne between 50 MHz and 500 MHz

    thanks for replies
  7. Replies
    1
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    836

    Closed: 9.9Ghz patch antenna with CST

    Hello guys,

    I tried to design a 8*8 patch antenna array at 9.9 Ghz with CST and first i designed a single element.
    i use the RO5880 Substrate with Er=2.2 and H=0.508 mm

    i would like to know...
  8. Replies
    2
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    1,008

    Closed: Re: Design a 8x8 antenna array at 9GHz

    hi bejing!

    i not desingning a butler matrix but my array has got the same phase
  9. Replies
    2
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    1,008

    Closed: Design a 8x8 antenna array at 9GHz

    Hi everyone!

    I need to design a 8x8 antenna arrays at 9 Ghz

    i tried with RO 5880 but i've got difficulties to achieve impedance macthing.

    i use as software, CST or ADS

    is it possible to...
  10. Replies
    4
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    656

    Closed: Re: RF Power amplifier use out of band

    Thanks guys for your answers!

    i need to design an amplifier in the band 600 MHz-3000 Mhz with an output power of 36bBm ; where i can find paper about that please?

    regards
  11. Replies
    4
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    656

    Closed: RF Power amplifier use out of band

    Hi Every One!

    I've got a question seems likes stupid but if someone want to answer please.

    I've got a power amplifier working in the 2100-2170 Mhz band, what could happened if i use it in a...
  12. Replies
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    1,378

    Closed: Re: Bandpass filter at 155Mhz

    Is anyone have links or papiers about how to built these filters?
  13. Replies
    8
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    1,378

    Closed: Re: Bandpass filter at 155Mhz

    Hi jiripolivka ,

    Thanks for your reply,

    You've right for my specifications about the filter but first, i wanted to Know what was the best technology to achieve it.
    Now i can give you some of...
  14. Replies
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    1,378

    Closed: Re: Bandpass filter at 155Mhz

    Thanks smooth!

    I found a lot of subject with your help now il going to study one of thème with your tool.


    Best regards
  15. Replies
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    1,378

    Closed: Bandpass filter at 155Mhz

    Hi guys,

    I want to design a narrow bandpass filter like this:
    Fc=155 MHz
    Bw= 2 MHz

    With verry hard shapes.

    I try to design with agilent genesys but i didn't have good result. -60 dB at fc...
  16. Replies
    1
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    572

    Closed: Band L microstrip antenna

    hello guys!

    i design a stacked patch antenna who works in L band and i would like to increase the banwith to work between 1.5 Ghz to 1.7 Ghz .
    i tried many to decrease the Er and increase the...
  17. Closed: How to determine parameters of meander-line antenna?

    Hi everybody!

    I need to design a 400 MHz meanderline antenna and i would like to know how determine the parameters for exemple, length , the number of turn !

    Is there a method to determine...
  18. Replies
    2
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    1,479

    Closed: Re: LPDA (400MHZ -1000MHZ) design - help needed

    hello!

    i have the same problem. i want to made a printed LPDA and i would like to know if i can use the same formulaes like a wire LPDA?

    it says that Carrel's formulaes is good but when i...
  19. Replies
    3
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    1,709

    [SOLVED] MICROSTRIP BANDPASS FILTER

    Hello guys!

    I would like to design a microstrip bandpass filter with a BW@ 3dB beetween 5.7 GHz to 6.8 GHz .

    My question is what is the best topology hairpin, coupled line? what is the best...
  20. [SOLVED] Re: Printed or planar log periodic antenna (Planar LPDA)

    hello!

    thank you for your answers! i find a link below:

    http://www.cem.bilkent.edu.tr/JP/JP44.pdf

    it seem on this paper it's that i want but what i need to know it's how to compute the...
  21. Replies
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    1,422

    Closed: Re: 1-18.0 GHz directional coupler

    i think he wanted to say " wilkinson splitter"

    regards
  22. [SOLVED] Printed or planar log periodic antenna (Planar LPDA)

    hi Guys!

    i wish to built a planar LPDA beetwin 600MHZ to 3GHZ and i would like to know is everybody have some formulae about how to make it.


    I try to use paper about usual LPDA but it doesn't...
  23. [SOLVED] magneto quasi statics

    Hi guys!

    I would like to know how to design and simulate a coil with Empire Xcell?
    is it possible to solve magneto quasi static problem with it?

    thanks
  24. Replies
    0
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    1,116

    [SOLVED] Dual band antenna with I3ED

    Hello guys!

    i would like to build a dual band patch antenna with IE3D F1=10Ghz and F2=20GHz.
    i would like to what is the best design to made it?

    i think about a first patch with the resonant...
  25. [SOLVED] Re: Problems with IE3D

    hi!

    i simulate my design with an infinite ground plane beause its take a long time to simulate with a finite ground plane.

    today i'll try to give you some news

    thanks
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