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March 2007 [Feedback] Low-Cost UWB Source With much interest I read Yeap Yean Wei's article, "Design A Simple, Low-Cost UWB Source," in the December 2006 issue of Microwaves & RF (p. 68). It reminded me of my old work with frequency multipliers using step-recovery diodes. I am finding one problem in both types of devices: your UWB and my frequency multipliers. The problem is that the load must be the 50-ohm termination. In my frequency multipliers, this load had to be well matched at a... December 2006 [Components] Design A Simple, Low-Cost UWB Source Ultrawideband (UWB) communications systems promise impressive bandwidths at low power levels through the use of time-coded pulses spread over a wide spectrum. While building a receiver capable of covering wide bandwidths is a challenge, creating the impulse generator to go with such an architecture can also be difficult. Fortunately, it is possible to assemble a relatively simple, low-cost, low-power UWB impulse generator by using a step-recovery diode (SRD) and a... |
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