The QCN-45D+ from Mini Circuits is a 90 Degree Hybrid Coupler with Frequency 2500 to 4500 MHz, Average Power 15 W, Insertion Loss 0.4 to 0.8 dB, Isolation 15 to 22 dB, Amplitude Balance 0.5 to 2.1 dB. Tags: Ceramic. More details for QCN-45D+ can be seen below.