Fan near vertical incidence skywave antenna with feed point near ground

A near vertical incident skywave (NVIS) radio communication system, comprising:

• a fan NVIS base station antenna in communication with a base radio set;
• a fan NVIS remote station antenna in communication with a remote radio set;
• and
• the base station antenna and the remote station antenna each comprising:
• a mast extending along a Z-axis and having height, h4, measured from ground;
• a plurality of dipoles crossing each other at a central feed point disposed at the mast, adjacent dipoles separated from each other by an angle, θ, when viewed along the Z-axis, the plurality of dipoles having a bowtie shape when viewed along the Z-axis, wherein each wing of the bowtie is symmetrical about the Z-axis;
• wherein the feed point is located at a height, h3, measured from ground;
• wherein each of the plurality of dipoles further includes end points located at a height, h2, measured from ground;
• wherein each of the plurality of dipoles further includes two vertices, each of the two vertices located at a height, h1, measured from ground, each of the vertices disposed at a location between one of the end points and the feed point;
• and
• wherein h4>h1>h2>h3.

A method of communicating using near vertical incident skywave (NVIS) radio communications, the method comprising:

• providing a base station with a fan NVIS base antenna in communication with a base radio set located in a base location and a remote station with a fan NVIS remote antenna in communication with a remote radio set located in a remote location, the base station antenna and the remote station antenna each further comprising:
• a mast extending along a Z-axis and having height, h4, measured from ground;
• a plurality of dipoles crossing each other at a central feed point disposed at the mast, adjacent dipoles separated from each other by an angle, θ, when viewed along the Z-axis, the plurality of dipoles having a bowtie shape when viewed along the Z-axis, wherein each wing of the bowtie is symmetrical about the Z-axis;
• wherein the feed point is located at a height, h3, measured from ground;
• wherein each of the plurality of dipoles further includes end points located at a height, h2, measured from ground;
• wherein each of the plurality of dipoles further includes two vertices, each of the two vertices located at a height, h1, measured from ground, each of the vertices disposed at a location between one of the end points and the feed point;
• and
• wherein h4>h1>h2>h3;
• and
• a base station user communicating with a remote station user.