This process uses a load to match the transmission line to the antenna, which controls the standing wave ratio (SWR). [k3ng] built his own automatic antenna tuner. First, it measures the SWR of ...

In order to transmit large amounts of data across the 240,000 miles (384,000 km) that separate Earth and the moon, VIPER has a gimballing precision-pointed, high-gain antenna that will send ...