HAUPPAUGE, N.Y., Feb. 25, 2026 (GLOBE NEWSWIRE) -- AmpliTech Group, Inc. (Nasdaq: AMPG, AMPGR, AMPGZ) today announced that its AmpliTech 5G Division and Researchers at Northeastern University's Institute for Intelligent Networked Systems (INSI), have successfully demonstrated the first open-source prototype of a massive MIMO (mMIMO) O-RAN system achieving O-RAN Category B operation in a laboratory environment.