directional HF antenna 定向高频天线
adjustable dipole HF antenna 可调偶极高频天线
omni-directional HF antenna 全向高频天线
adjustable e dipole HF antenna 可调偶极高频天线
directional U HF antenna 定向高频天线
directional E HF antenna 定向高频天线
omni-directional l HF antenna 全向高频天线
shipboard high frequency hf antenna 舰船短波通信天线
In this paper, we devise an experiment, using HF surface wave discharge to excite plasma, to analyze basic characteristics of plasma antenna elements.
本文设计了一种实验方案，用高频表面波放电来激发等离子体，并分析了等离子体天线元的基本特性。
Finally, the antenna, ASK modulation, power supply of the tag, load impedance modulation, demodulation, power supply sensor and HF power amplifier were realized.
本文实现了天线、ASK调制、应答器的电源、负载调制、解调、电源传感器和高频功放模块。
In order to receive omnidirectional low-SNR signal of whole HF band, we present an adaptive omni-direction & narrow-beam receiving antenna array.
为了实现对短波频段全空域低信噪比信号的良好接收，本文提出了一种窄波束全向接收的自适应天线阵。
应用推荐