Please refer to the photos for any noticeable damage, as this is a used book. Of course, there are no problems with normal reading and use, so please rest assured. Please purchase only if you understand that this is a used item. Thank you. If you have any questions, please feel free to comment! I may have overlooked something, but I didn't find any writing. I have many other books for sale, so please take a look if you'd like. Also, if the items on sale can be combined, I will ★discount★ (for example, 100 yen off for a single book, 500 yen off for two sets of multiple books for宅配, etc.). Please comment for an estimate. #KiikoR読書 You can search for books on sale from the above #KiikoR読書noその他 You can search in detail by changing the genre from the above "High Frequency Technology Sense Up 101: To get along well with high-frequency signals from several M to several hundred MHz" Atsushi Hirohata Price: ¥3000 Content Description High-frequency circuit design is often avoided because it is considered difficult, but from the perspective of AC circuits, it is the same as low-frequency circuits. In the DC and low-frequency regions, we are only using it in a range where many factors can be ignored. This book explains in an easy-to-understand manner the basic knowledge of high-frequency impedance concepts and how to use Smith charts, as well as practical knowledge such as low-noise amplification and implementation techniques. #AtsushiHirohata #Atsushi_Hirohata #book #electricity/machine/electronic communication