Model WM8PD-6-26.5-S from Werbel Microwave is a wideband 8-way in-line power splitter covering 6 to 26.5 GHz with excellent return loss, low insertion loss, and high isolation performance.   Return loss 19dB typical.   Insertion loss 1.3dB typical.  Isolation 19dB typical.  Amplitude balance ±0.3dB typical.  Phase balance ±4 degrees typical.  Made in USA.