SAN DIEGO, Aug. 19, 2021 (GLOBE NEWSWIRE) -- GBT Technologies Inc. (OTC PINK: GTCH) ("GBT” or the “Company”), is now testing - Near Vertical Incidence Skywave (NVIS) Antenna Technology for its Infinia ...

The real action in the world of ham radio is generally in the high frequency bands. Despite the name, these are relatively low-frequency bands by modern standards and the antenna sizes can get a ...