Can digitally tunable capacitors revolutionize wireless communications?

摘要

Thinking about the numerous forms of wireless communication we employ today can make your head spin. We have 2G, 3G, and 4G cellular networks, Bluetooth and Zigbee WPANs, GPS and GLONASS mobile satellite, Wireless USB, Wi-Fi, standard radio bands, RFID, and LTE. Different wireless standards deployed on different frequency bands supplied by different regional carriers. Yikes! To add another level of complexity to the mix, most of the mobile devices we commonly use such as smart phones and tablets are multiband.