Signal transceiver apparatus, feeding structure, and antenna

A feeding structure, comprising:

• a phase shifter;
• and
• a signal transceiver apparatus electrically connected to the phase shifter, the signal transceiver apparatus comprising:
• a base comprising at least one sidewall, the base having a first cavity and a second cavity defined therein;
• a first interface in the first cavity;
• a first filter circuit in the first cavity, the first filter circuit comprising a first end and a second end opposite to the first end, wherein the first end of the first filter circuit is connected to the first interface, and the first filter circuit is configured to transmit a signal of a first frequency band;
• a second interface in the second cavity;
• a third interface in the second cavity;
• a second filter circuit in the second cavity, the second filter circuit comprising a first end and a second end opposite to the first end, wherein the first filter circuit and the second filter circuit are parallel, the first end of the second filter circuit is connected to the second interface, and the second filter circuit is configured to transmit a signal of a second frequency band;
• and
• a connecting component comprising a first end and a second end opposite to the first end, and a third end between the first end of the connecting component and the second end of the connecting component, wherein the first end of the connecting component is in the first cavity, the first end of the connecting component is connected to the second end of the first filter circuit, the third end of the connecting component is in the second cavity, the third end of the connecting component is connected to the second end of the second filter circuit, and the second end of the connecting component is connected to the third interface, the connecting component is a single unitary structure that extends continuously from the first cavity through the second cavity to the third interface, the connecting component comprises impedance-transformed transmission line segments configured to perform impedance matching for signals of different frequency bands, and the connecting component is configured to transmit signals of the first frequency band and the second frequency band.