Covering 18–110 GHz in K, Ka, Q, U, V, E, and W bands, 28 models of precision waveguide directional couplers are offered with 10 or 20 dB coupling values and directivity of 30 dB typ with insertion loss as low as 0.6 dB. Standard and split block configurations as well as E-Bend and H-Bend designs are available, and multi-hole design promotes optimal power reflection measurements and consistent performance. Construction is of gold-plated brass copper.