Surface-acoustic-wave (SAW) and bulk-acoustic-wave (BAW) Filters will be disruptor in the military RF and microwave industries

The complexity of current 4G/5G phones comes from the need to cover multiple bands. Modern modems like the ones used in mobile phones are compatible with multiple transmission bands, including 3G, 4G LTE, Wi-Fi, and Bluetooth. The radio frequency front-end (RFFE) section of cellphone includes components like antennas, LNAs, filters, and switches. The usual arrangement is to divide the RFFE into sections for low bands (698-960 MHz), mid-band (1710-2200 MHz), and high-band (2400-3800 MHz).  5G would add another section. Filters are components required for dividing the frequency band. Filter main role is to selectively transmit and receive desired signals and greatly attenuating the other frequency components, reduce the interference of the signal.