Antenna in package, radio frequency chip, test device and test method

A radio frequency chip, comprising a die and an antenna in package;

• wherein:
• the antenna in package comprises at least one antenna, one or more coupling structures and at least one testing terminal;
• the at least one antenna, the one or more coupling structures and the at least one testing terminal are disposed in a package body;
• the at least one antenna includes one or more radiation units, the one or more coupling structures are coupled to the one or more radiation units, and each coupling structure of the one or more coupling structures is coupled to a respective testing terminal of the at least one testing terminal;
• the one or more radiation units are disposed in a radio frequency link, and the one or more coupling structures are configured to transmit radio frequency test signals from the radio frequency link during testing the radio frequency link;
• the die is coupled to the at least one antenna of the antenna in package to form the radio frequency link;
• and
• the at least one testing terminal of the antenna in package is configured to form a testing loop using external test equipment and the radio frequency link during testing the radio frequency link.