The JX-CF1-28G40G-13J from Chengdu Jingxin Microwave Technology is a Band Pass Filter with Frequency 28 to 40 GHz, Center Frequency 34 GHz, Insertion Loss 3.2 dB, Upper Rejection 55 dB, Lower Rejection 55 dB. Tags: Module with Connectors, Cavity Filter. More details for JX-CF1-28G40G-13J can be seen below.