Antenna apparatus and electronic device

An antenna apparatus, comprising:

• a plurality of antenna units, spaced from each other;
• a plurality of decoupling networks, corresponding to the plurality of antenna units one to one, wherein each of the decoupling networks comprises:
• a first transmission line, an end of the first transmission line being configured to be connected to a radio frequency (RF) chip;
• and
• a second transmission line, the other end of the first transmission line being connected to an end of the second transmission line, a decoupling port being formed at a joint between the other end of the first transmission line and the end of the second transmission line, and the other end of the second transmission line being connected to a corresponding antenna unit;
• and
• a decoupling transmission line, connected between adjacent decoupling ports, wherein a length of the decoupling transmission line is determined based on a phase of an initial isolation degree between each two adjacent antenna units of the plurality of antenna units, and the initial isolation degree is an isolation degree when the adjacent antenna units are not connected to the decoupling networks;
• the decoupling transmission line comprises a first segment, a second segment, a third segment, a fourth segment and a fifth segment connected in sequence;
• a width of the first segment is the same with a width of the fifth segment, and a width of the second segment is the same with a width of the fourth segment;
• the width of the first segment is less than the width of the second segment, and the width of the second segment is less than a width of the third segment;
• and
• a width of the fifth segment is less than the width of the fourth segment, and the width of the fourth segment is less than the width of the third segment.