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January 2011 [Editorial] Make Quick Work Of Impedance Measurements Knowing the impedance of a transmission line can be useful for many design tasks. The line may be a piece of coaxial cable that can serve a test system setup in a laboratory, if its impedance could be found. There are various techniques for determining the impedance of a transmission line, both simple and complicated and varying in accuracy accordingly. For those in need of a relatively quick method for finding the impedance of a transmission line, based on ... October 2006 [Components] Simplify The Calculation Of Microstrip Dimensions Circuit traces on microstrip printed circuit boards (PCBs) form the interconnections between components in addition to the components themselves. These controlled-impedance lines are typically designed with a characteristic impedance of 50 Ω for RF/microwave circuits or 75 Ω for cable television (CATV). The equations commonly associated with calculating the geometry of microstrip lines based on a desired impedance are quite complex and not easy to handle.... |
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