The AM3135 from Atlanta Micro is a Tunable Filter with Tunable Frequency 3.5 to 6.5 GHz / 5.5 to 9 GHz, Bandwidth 3000 MHz / 3500 MHz, Rejection 50 dB, Input Power 27 dBm, Insertion Loss 7.5 dB. Tags: Surface Mount, Voltage Controlled. More details for AM3135 can be seen below.