The AE1575-1189D1169 from Anatech Electronics is a RF Duplexer with Frequency 1557.92 to 1592.92 MHz / 1167 to 1212 MHz, Band 1 1557.92 to 1592.92 MHz, Band 2 1167 to 1212 MHz, Insertion Loss 2 to 2.8 dB, Isolation 50 dB. Tags: Surface Mount, Ceramic. More details for AE1575-1189D1169 can be seen below.