【摘要】 采用自行设计的高频发射机(10-20 MHz),时环天线和线天线进行了激发实验．结果表明：直接耦合环形天线在射频(RF)功率大于10 W时,可激发天线中的气体形成等离子体,射频功率降到5 W时,等离子体仍可维持．对于线天线,直接耦合时射频功率达到20 W时可激发产生等离子体；电容耦合时射频功率达到30 W时可激发产生等离子体,射频功率降至10 W时,两种耦合方式均可维持等离子体．用环形金属天线作接收天线,剥量了环状和线状等离子体天线在直接耦合方式和电容耦合方式时的发射性能,结果表明：等离子体天线与普通金属天线一样具有辐射性能,接收到的信号电平随发射信号电平增大而增大,呈近似线性关系．因此,等离子体天线可以用于高频无线电通信．更多还原

【Abstract】 Loop antenna and wire antenna were excited using self- made HF generator (10~20 MHz) . It shows that the directly coupled loop antenna can be excited to produce plasmas when RF power came up to 10W and plasmas can be maintained with more than 5W. For the wire antenna, plasmas can be produced when RF power came up to 20W for directly coupled antenna or 30W for capacitively coupled antenna, and plasmas can be maintained with more than 10W. Emission characteristics of plasma antennas (loop antenna and wire antenna) were also researched using metal loop antenna as receiving antenna. It was found that plasma antennas could emit RF wave as well as metal antennas and received signal level was linear with the emitted signal level, so that plasma antennas can be used to HF communications.更多还原