Transportable Rapidly Deployable High-Frequency (HF) Horizontal Fan Antenna System and Method

A Transportable Rapidly Deployable High-Frequency (HF) and NVIS Horizontal Fan (ENV-2) Antenna System (e.g., with fan assembly 1300), comprising:

• a transportable kit including a balun assembly configured to be connected to a central elevated support member or mast and configured to provide first and second central elevated electrical connections to and mechanical support for upper connection points for a first fan antenna assembly 1300A and a second fan antenna assembly 1300B;
• wherein once erected, the first fan antenna assembly 1300A and second fan antenna assembly 1300B are radially arrayed at substantially 180 degrees from one another (with a tolerance of + or − 5 degrees, see, e.g., FIGS. 11A-11C) and the selected spread or horizontal distance 530 between the opposing bottom wire element distal ends is less than 20 feet;
• wherein said transportable (ENV-2) Antenna System (e.g., with fan assembly 1300) provides a VSWR impedance match of less than 2 over a frequency range of 3 MHz to 10 MHz;
• and
• wherein said transportable (ENV-2) Antenna System (e.g., with fan assembly 1300) provides a realized gain that varies in the range of −2 dB to −8 dB for HF frequencies in the range of 3 MHz to 10 MHz

A method for deploying and erecting a substantially horizontal High-Frequency (HF) antenna system (e.g. 100), comprising:

• (a) providing a base (e.g., 120), a telescoping or sectioned central support or mast (e.g., 200) with a mast top end (e.g., 400) said mast being configured to be removably attachable to said base and extended, an antenna assembly (e.g., 300) comprising a first dipole antenna assembly (e.g., 300A) with a plurality of at least two wire elements (e.g., 360, 362) connected at one end to a first conductive spreader paw (e.g., 410A) and a second dipole antenna assembly (e.g., 300B) with a plurality of wire elements connected at one end to a second conductive spreader paw (e.g., 410B), said first and second conductive spreader paws being configured to be releasably attached to an insulated guy point configured to be attached proximate to said mast top 400;
• (b) assembling said base 120 and said mast 200 while said mast is not fully extended;
• (c) attaching said first dipole antenna assembly (e.g., 300A) first conductive spreader paw (e.g., 410A) to said insulated guy point proximate to said mast top 400 and extending the first dipole antenna assembly wire elements (e.g., 360, 362) into a planar fan shaped configuration along a first sloped plane projecting downwardly at a selected sloped angle (e.g., 540A) from said mast top 400 along a first dipole antenna assembly central axis aligned along a first azimuth (e.g., North);
• (d) attaching said second dipole antenna assembly (e.g., 300B) second conductive spreader paw (e.g., 410B) to said insulated guy point proximate to said mast top 400 and extending the second dipole antenna assembly wire elements (e.g., 360, 362) into said planar fan shaped configuration along a second sloped plane projecting downwardly at a selected sloped angle (e.g., 540B) from said mast top 400 along a second dipole antenna assembly central axis which is substantially colinear with said first dipole antenna assembly central axis but 180 away, aligned along an opposing azimuth (e.g., South);
• (e) raising or extending the central support or mast (e.g., 200) so that the top end (e.g., 400) projects upwardly from a ground reference plane (e.g., 500) by a selected antenna top end attachment height (e.g., 550), greater than 27 feet (preferably 28 or 29 feet);
• and
• (f) supporting the lower distal coplanar ends (e.g., 360, 362) of said first dipole antenna assembly (e.g., 300A) in an orientation intersecting with a horizontal ground height plane (e.g., 510) at a selected height above (e.g., 6 feet to 7.5 feet) a reference ground plane (e.g., 500).