The 16CX11-752-X108N11 from Reactel is a bandpass filter for LTE with a pass band from 698 MHz to 806 MHz. It has an insertion loss of less than 1.2 dB, an attenuation of more than 30 dB and return loss of more than 10 dB. It is available with in a module with N Type connectors that measures 4.5 x 2.9 x 13.1 inches. Reactel has a large variety of 700 MHz LTE and other wireless band filters and multiplexers. You can contact them for custom filter requirements.
