Opening resonant ring leaky-wave antenna for microstrip line coupled feeding

The invention relates to the technical field of planar leaky-wave antennas, in particular to a microstrip line coupled feeding split-ring resonator leaky-wave antenna, which has the characteristics of simple structure, small size, wide bandwidth, high radiation efficiency and wide-angle scanning compared with the prior art. The feed structure of the antenna structure is only a microstrip line and has no complex feed network, and the split-ring resonators are in a coupled feed mode. Meanwhile, two ports are adopted, one port is used for port feeding, the other port is connected with a matched load and used for absorbing non-radiated energy, electromagnetic energy is prevented from being reflected back to affect antenna radiation, and the broadband is formed, the antenna structure is within the bandwidth range, the scanned beam angle can be changed from the forward direction to the reverse direction, the scanning angle exceeds 60 degrees, and the scanning range is wide. As the I-type split-ring resonators are c