SAW, BAW and the future of wireless
نویسنده
چکیده
A high-end smartphone must filter the transmit and receive paths for 2G, 3G, and 4G wireless access methods in up to 15 bands, as well as Wi-Fi, Bluetooth and the receive path of GPS receivers. Signals in the receive paths must be isolated from one another. They also must reject other extraneous signals whose causes are too diverse to list. To do so, a multi-band smartphone will require eight or nine filters and eight duplexers. Without acoustic filter technology, it would be impossible.
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