Latest News & Updates Mini-Circuits Updates Coupler Product Line extending the frequency range of the catalog products up to 6 GHz and down to 5 kHz in both coaxial and surface mount designs with coupling ratios to 30 dB in small signal and high power variants for more, click here Mini-Circuits Releases New High Power Coupler Line to 500 Watts.  The ZGDC Series incorporates suspended stripline construction to offer superior insertion loss and power handling capability up to 500 Watts.  These couplers are cased in a IP-65 weatherproof chassis for rugged applications  for more, click here