The EOS 650D replaces the popular EOS 550D at the top of Canon’s entry-level DSLR line-up, sitting just above the EOS 600D. Many features from the 550D continue in the new model and, like its ...
The EOS 800D is squarely pitched at entry level photographers who want a more ‘serious’ camera that can accept interchangeable lenses. It certainly looks the part and, for its price, is well built and ...
Abstract: The quasi-2-D slow wave structures (quasi-2D SWSs) have mostly widely used in sheet electron beam traveling wave tubes (SEB TWTs) in recent years. This article proposed a new fast ...
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