Top-loading monopole antenna apparatus with short-circuit conductor connected between top-loading electrode and grounding conductor

A top-loading monopole antenna apparatus having a feeding point, comprising:

• a grounding conductor;
• a top-loading electrode provided so as to oppose to said grounding conductor;
• a linear conductor element for electrically connecting the feeding point through a second reactive element with said top-loading electrode;
• and
• a short-circuit conductor for electrically connecting said top-loading electrode with said grounding conductor.

A top-loading monopole antenna apparatus having a feeding point, comprising:

• a grounding conductor;
• a top-loading electrode provided so as to oppose to said grounding conductor;
• a short-circuit conductor for electrically connecting said top-loading electrode through a first reactive element with said grounding conductor, and
• a linear conductor element for electrically connecting the feeding point through a second reactive element with said top-loading electrode.

A communication system comprising:

• a radio receiver;
• and
• a top-loading monopole antenna apparatus having a feeding point,
• wherein said top-loading monopole antenna apparatus comprises:
• a grounding conductor;
• a top-loading electrode provided so as to oppose to said grounding conductor;
• a linear conductor element for electrically connecting the feeding point with said top-loading electrode;
• and
• a short-circuit conductor for electrically connecting said top-loading electrode through a first reactive element,
• wherein said top-loading monopole antenna apparatus is electrically connected with said radio receiver.

A mobile communication system comprising:

• a radio receiver provided in a mobile body;
• and
• a top-loading monopole antenna apparatus having a feeding point,
• wherein said top-loading monopole antenna apparatus comprises:
• a grounding conductor;
• a top-loading electrode provided so as to oppose to said grounding conductor;
• a linear conductor element for electrically connecting the feeding point with said top-loading electrode;
• and
• a short-circuit conductor for electrically connecting said top-loading electrode through a first reactive element,
• wherein said top-loading monopole antenna apparatus is provided on at least one of inside and outside of said mobile body and being electrically connected with said radio receiver.

A top-loading monopole antenna apparatus having a feeding point, comprising:

• a first top-loading electrode provided so as to oppose to a grounding conductor;
• a linear feeding element for electrically connecting the feeding point with said first top-loading electrode;
• a second top-loading electrode provided so as to oppose to the grounding conductor;
• and
• a linear parasitic element for electrically connecting the feeding point with said second top-loading electrode,
• wherein said first top-loading electrode and said second top-loading electrode are provided adjacently so as to be electromagnetically coupled to each other.

A communication system comprising:

• a radio receiver;
• and
• a top-loading monopole antenna apparatus having a feeding point,
• wherein said top-loading antenna apparatus comprises:
• a first top-loading electrode provided so as to oppose to a grounding conductor;
• a linear feeding element for electrically connecting the feeding point with said first top-loading electrode;
• a second top-loading electrode provided so as to oppose to the grounding conductor;
• and
• a linear parasitic element for electrically connecting the feeding point with said second top-loading electrode,
• wherein said first top-loading electrode and said second top-loading electrode are provided adjacently so as to be electromagnetically coupled to each other, and
• wherein said top-loading monopole antenna apparatus is electrically connected with said radio receiver.

A mobile communication system comprising:

• a radio receiver provided in a mobile body;
• and
• a top-loading monopole antenna apparatus having a feeding point,
• wherein said top-loading antenna apparatus comprises:
• a first top-loading electrode provided so as to oppose to a grounding conductor;
• a linear feeding element for electrically connecting the feeding point with said first top-loading electrode;
• a second top-loading electrode provided so as to oppose to the grounding conductor;
• and
• a linear parasitic element for electrically connecting the feeding point with said second top-loading electrode,
• wherein said first top-loading electrode and said second top-loading electrode are provided adjacently so as to be electromagnetically coupled to each other, and
• wherein said top-loading monopole antenna apparatus is provided on at least one of inside and outside of said mobile body and being electrically connected with said radio receiver.