Envelope Tracking Power Amplifiers for Wireless Communications (Artech House Microwave Library)

I have found this book helpful, but the reading is sometimes slow because I find that I must re-word the author's sentences to understand what he is trying to say. English is clearly not his first language. For example, he writes "In this manner, the PA devotes on the edge of compression region most of the time". I believe he is trying to say "In this manner, the PA OPERATES on the edge of THE compression region most of the time". While this may make the reading more difficult, I have found it to be worth the effort.

Excellent book and excellent service

色々と設定したが数式だけは文字（特に下付き文字）が潰れてほとんど読めない。文章から推測はできるが、これのせいで非常に読みにくくなっている。著者が改善版を出してくれるのを期待する。内容は良いので、解像度さえ改善されれば星５つ。Kindle version uses very low resolution figures. And equation is also shown as a low resolution figure.Contents is good, but fig. and equation are hard to read. (I think author did not check kindle ver.)If author re-make high resolution version, I will post 5 stars.