Radio frequency chip, signal transceiver, and communication device

A signal transceiver, comprising:

• a radio frequency chip;
• and
• a printed circuit board (PCB), provided with a recessed structure for accommodating the radio frequency chip;
• with the radio frequency chip comprising:
• a chip (200), that is configured to generate an electromagnetic signal or process an electromagnetic signal;
• a coupling structure (100), that comprises:
• a resonator (110) having a resonant cavity (112) and a groove (114), wherein an inner wall of the resonant cavity (112) is made of metal, one end of the resonant cavity (112) is opened on a top surface (1102) of the resonator (110), the other end of the resonant cavity is sealed by using a metal material, a cross section of the resonant cavity (112) is formed into a centro-symmetric shape, and the groove (114) connects an outer wall of the resonator (110) and an inner wall of the resonant cavity (112);
• a redistribution layer (RDL) (120), arranged above the top surface (1102) and comprising an RDL dielectric layer (124);
• a radiator (130), made of metal, formed into a centro-symmetric shape, arranged on a surface that is of the RDL dielectric layer (124) and that faces the resonator (110), and accommodated in the resonant cavity (112);
• and
• a feeder (140), accommodated in the groove (114), wherein one end of the feeder (140) is connected to the chip (200), and the other end of the feeder (140) is inserted into the resonant cavity (112);
• and
• a packaging structure (300), that is configured to package the chip (200) and cover the RDL (120), wherein a through hole (310) for accommodating the metal connector is formed on the packaging structure (300), one end of the metal connector is in contact with a surface that is of the RDL (120) and that faces away from the resonator (110), the other end of the metal connector is configured to connect to a polymer transmission cable, and a cross section of the through hole (310) is formed into a centro-symmetric shape;
• wherein a symmetry center of the radiator (130), a symmetry center of the resonant cavity (112), and a symmetry center of the through hole (310) are coaxially arranged, and a deviation between cross-sectional sizes of the through hole (310) and the resonant cavity (112) is within a first preset range.

A communication device, comprising:

• a signal transceiver, wherein signal transceiver comprising:
• a radio frequency chip;
• and
• a printed circuit board PCB, provided with a recessed structure for accommodating the radio frequency chip;
• with the radio frequency chip comprising:
• a chip (200), that is configured to generate an electromagnetic signal or process an electromagnetic signal;
• and
• a coupling structure (100), that comprises:
• a resonator (110), wherein a resonant cavity (112) and a groove (114) are formed, an inner wall of the resonant cavity (112) is made of metal, one end of the resonant cavity (112) is opened on a top surface (1102) of the resonator (110), the other end of the resonant cavity is sealed by using a metal material, a cross section of the resonant cavity (112) is formed into a centro-symmetric shape, and the groove (114) connects an outer wall of the resonator (110) and an inner wall of the resonant cavity (112);
• a redistribution layer (RDL) (120), arranged above the top surface (1102) and comprising an RDL dielectric layer (124);
• a radiator (130), made of metal, formed into a centro-symmetric shape, arranged on a surface that is of the RDL dielectric layer (124) and that faces the resonator (110), and accommodated in the resonant cavity (112);
• and
• a feeder (140), accommodated in the groove (114), wherein one end is connected to the chip (200), and the other end is inserted into the resonant cavity (112);
• and
• a packaging structure (300), that is configured to package the chip (200) and cover the RDL (120), wherein a through hole (310) for accommodating the metal connector is formed on the packaging structure (300), one end of the metal connector is in contact with a surface that is of the RDL (120) and that faces away from the resonator (110), the other end of the metal connector is configured to connect to a polymer transmission cable, and a cross section of the through hole (310) is formed into a centro-symmetric shape;
• wherein a symmetry center of the radiator (130), a symmetry center of the resonant cavity (112), and a symmetry center of the through hole (310) are coaxially arranged, and a deviation between cross-sectional sizes of the through hole (310) and the resonant cavity (112) is within a first preset range.