https://www.dolphmw.com/what-are-the-common-types-of-double-ridge-waveguides.html What Are the Common Types of Double Ridge Waveguides? 1. Double ridge waveguide adapter The waveguide to coax adapter series products have the characteristics of wide bandwidth, complete specifications, low voltage standing wave ratio, and low insertion loss. The frequency range is 0.3 ~ 110 GHz, and the waveguide bandwidth is less than or equal to 1.25 and 10% bandwidth, with performance at low voltage standing wave ratio ≤1.15, and they are divided into orthogonal structure (right angle), end launching and high-power types by structure.