The HF0BA1840A7 from KYOCERA AVX is a RF High Pass Filter with Frequency 1.84 to 2.83 GHz, Bandwidth 990 MHz, Insertion Loss 0.85 to 1.20 dB, Power 2 W, Rejection 30 to 40 dB. Tags: Surface Mount, PCB Mount, Ceramic Filter. More details for HF0BA1840A7 can be seen below.