The AM3134 from Atlanta Micro is a Tunable Filter with Tunable Frequency 2 to 3.2 GHz / 2.5 to 4.5 GHz, Bandwidth 1200 MHz / 2000 MHz, Rejection 50 dB, Input Power 27 dBm, Insertion Loss 7.5 dB. Tags: Surface Mount, Voltage Controlled. More details for AM3134 can be seen below.