SMA connectors are designed for applications operating from DC to 35 GHz (Extendable up to 40 GHz). For best results, you’ll need a hybrid coupler that comes with 2.92 mm, or “K Type” connectors. The K connector is designed for use up to 40 GHz. KRYTAR hybrid coupler models that come with these are identified by the letter “K” at the end of the model number. If you need other types of connectors, just let us know.