# PCB design from circuit

1. ## PCB design from circuit

Hello, i have a circuit that was made in AWR microssoft office, and i want to create a pcb but i dont know about it, can any person tell me how can create this transmition lines (TLINE) that apear in the diagram?
Thank you, and sorry or my english.

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2. ## Re: PCB design from circuit

Have you ever drawn a RF PCB before ?? If you haven't, it will be a bit challenging.
Transmission Lines are not ordinary PCB tracks and they have to be carefully drawn with their dimensions.Here, TLs are given by Electrical Length ( Degree) and Characteristic Impedance ( Ohm) so first you have to transform these quantities into Physical ones using with the Substrate which is to be used.So, you should calculate these first by either by assistance a TL Calculator or hand..
Then once the Physical Values are clear, you can draw TLs on the PCB.

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3. ## Re: PCB design from circuit

Saturn PCB toolkit is a good start...

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4. ## Re: PCB design from circuit

Hello, thanks for your responce, i have never drawn a RF PCB before, but I've always wanted to do it and i'd like to learn. If you are willing to guide me I know that I can learn, the material i will use is the ordinary Bakelite. The relative permeability i think is 4.9, the other data are in the circuit, (Z0 = 50 ohm, EL = 25 Deg and F0 = 1900 Mhz.) If you know any program that with this data can draw the equivalent circuit and i can learn, i will be very grateful and it will be useful to know it for next designs, thank you very much and sorry for my english and the inconvenience.
Regards,
Alberto.

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Thank you for your replay, I have downloaded the program and i dont know how to work with it. Thank you.

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Hello, sorry, when i say ordinary bakelite i mean fiberglass substrate.
Thank you.

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5. ## Re: PCB design from circuit

Hello, please i found this website, i think this is what i need, please let me know if data i put is correct for fiberglass and if is correct the width and the length of the transmition line.
Thank you
http://www.emtalk.com/mscalc.php?er=...units_list=Lmm

6. ## Re: PCB design from circuit

Hello, please i found this website, i think this is what i need, please let me know if data i put is correct for fiberglass and if is correct the width and the length of the transmition line.
Thank you
http://www.emtalk.com/mscalc.php?er=...units_list=Lmm

It seems correct but Tan_Delta should also be defined to get a healthy result.

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7. ## Re: PCB design from circuit

OK, please if you have another better website fr this , please send it to me.
Thank you.

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9. ## Re: PCB design from circuit

1 members found this post helpful.

Thank you.

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