$GTCH SAN DIEGO, Aug. 10, 2021 (GLOBE NEWSWIRE) -- GBT Technologies Inc. ( OTC PINK: GTCH ) ("GBT” or the “Company”), is now evaluating and testing self-tuned antenna technology in order to enhance its Infinia Long Range radio performance. An automatic antenna tuning system a technology that improves power transfer between the transmitter and antenna to adapt to ionospheric propagation conditions, ensuring the optimal communication performance. High-frequency (HF) radio, also known as shortwave radio, enables worldwide coverage due to electromagnetic wave refraction in the ionosphere, this phenomenon is also known as skywave propagation.

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