L-waveband frequency adjustable micro-strip paster antenna

The invention discloses an L-waveband frequency adjustable micro-strip paster antenna, relating to the micro-strip paster antenna technology field. The antenna consists of three layers of substrates; a radiation paster is arranged above the upper substrate; a metal grounding plate is arranged under the lower layer substrate; and a mixture of water and air is in a middle layer. The L-waveband frequency adjustable micro-strip paster antenna uses an SMA adapter to perform feeding on the antenna and changes a water surface height and resonance frequency points of the antenna. The L-waveband frequency adjustable micro-strip paster antenna can realize L-waveband full coverage; a radiation direction pattern of the antenna is a typical micro-strip antenna direction pattern at each resonance frequency point; and the gain can also satisfy practical application requirements. 本发明公开了L-波段频率可调微带贴片天线，涉及微带贴片天线技术领域。天线由三层基板组成，上层基板上方为辐射贴片，下层基板下方为金属接地板，中间层为水与空气混合，利用SMA转接头对天线进行馈电，改变水面高度即改变天线的谐振频点。本发明可以实现L-波段的全覆盖，天线的辐射方向图在各个谐振频点处均为