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dink
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My take on RF in electronic design has always been, if the wavelength of the frequency you are working with is less than 10 times the length of the board/device(s), you should be using impedance matched networks for traces and cabling.
Currently I have a problem where the wavelength is the same length as the object I am designing (isn't a PCB), and the cost of RF matched cabling is 10x to 100x the budget I was shooting for. Specifically trying to drive a 125MHz square wave into an off the shelf flat flexible cable approximately 10 inches long, without a ground plane. I am assuming the third taylor expansion and thus designing to 625MHz.
What are your thoughts on these rules? Would significant jitter and signal degradation occur?
Thanks
Currently I have a problem where the wavelength is the same length as the object I am designing (isn't a PCB), and the cost of RF matched cabling is 10x to 100x the budget I was shooting for. Specifically trying to drive a 125MHz square wave into an off the shelf flat flexible cable approximately 10 inches long, without a ground plane. I am assuming the third taylor expansion and thus designing to 625MHz.
What are your thoughts on these rules? Would significant jitter and signal degradation occur?
Thanks