MIMO antenna having adjustable decoupling structure

A MIMO antenna, comprising:

• a first antenna;
• a second antenna;
• and
• an adjustable decoupling structure disposed between the first antenna and the second antenna and configured to reduce coupling between the first antenna and the second antenna, wherein the adjustable decoupling structure comprises,
• a first adjustable capacitor and a second adjustable capacitor connected in series,
• a first adjustable inductor and a second adjustable inductor that are connected in parallel, and
• a first decoupling circuit comprising the first and second adjustable capacitors and the first and second adjustable inductors, wherein one end of the first adjustable capacitor is connected to a first port and another end of the first adjustable capacitor is connected to a first node, one end of the second adjustable capacitor is connected to the first node, and the other end of the second adjustable capacitor is connected to the second adjustable inductor, two ends of the first adjustable inductor are separately connected to the first node and a second node, and one end of the second adjustable inductor is connected to the second adjustable capacitor, and the other end of the second adjustable capacitor is connected to the second node, and
• a second decoupling circuit having a same circuit structure as the first decoupling circuit, and wherein the second decoupling circuit and first decoupling circuit are symmetrically disposed.