Dual-band monopole antenna with antenna signal fed through short-circuit terminal of transmission line

A dual-band monopole antenna, comprising:

• a transmission line load comprising:
• a core transmission line having an extension section connection terminal and a signal feeding terminal, and
• an outer circumferential conductor circumferentially surrounding and spaced from the core transmission line by a given distance, the outer circumferential conductor having an open terminal and a short-circuit terminal, an antenna signal being fed from the signal feeding terminal of the core transmission line to the transmission line load through the short-circuit terminal of the outer circumferential conductor;
• and
• an antenna extension section having a top terminal and a transmission line connection terminal, the transmission line connection terminal being connected to the extension section connection terminal of the core transmission line, wherein the outer circumferential conductor comprises at least two parallel and spaced conductors.

A dual-band monopole antenna, comprising:

• a transmission line load comprising:
• a core transmission line having an extension section connection terminal and a signal feeding terminal, and
• an outer circumferential conductor circumferentially surrounding and spaced from the core transmission line by a given distance, the outer circumferential conductor having an open terminal and a short-circuit terminal, an antenna signal being fed from the signal feeding terminal of the core transmission line to the transmission line load through the short-circuit terminal of the outer circumferential conductor;
• and
• an antenna extension section having a top terminal and a transmission line connection terminal, the transmission line connection terminal being connected to the extension section connection terminal of the core transmission line, wherein the outer circumferential conductor comprises an outer spiral tube body.