Horn antenna device and step-shaped signal feed-in apparatus thereof

A horn antenna device comprising:

• a step-shaped signal feed-in apparatus comprising:
• a fixture base having:
• a first end;
• a second end distal to the first end;
• and
• a connector formed in the first end;
• a head connected to the connector of the fixture base and having a socket;
• and
• a stepped body mounted in the fixture base and having:
• multiple stairs sequentially formed along an axial direction of the fixture body, wherein a highest stair is near the first end of the fixture base, and a lowest stair is near the second end of the fixture base;
• and
• a connecting pin formed on a side surface of the highest stair and connected to the socket of the head;
• and
• a conical horn antenna having:
• a signal input-and-output (I/O) end connected to the second end of the fixture base of the step-shaped signal feed-in apparatus;
• and
• a signal radiating end distal to the signal I/O end.