Four Square Antennas Projects
Vertical array system for 160m and 80m bands
Four-square antenna arrays are a popular choice for hams seeking directional gain on the lower HF bands, especially for DX operation. These phased vertical arrays use four quarter-wave elements arranged in a square, allowing operators to switch direction and focus their signal. They are particularly effective on bands like 160, 80, and 40 meters, where physical space often limits the use of large Yagi antennas.
Many operators share their antenna projects for building and optimizing four-square arrays, often detailing construction for specific bands like 80m or 40m. Resources cover various design considerations, including ground-mounted verticals, elevated radials, and even compact designs for smaller lots. You can find examples of receive-only four-square antennas and designs incorporating folded counterpoises (FCP) for those with limited space for extensive radial systems.
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A 21 MHz Four Square Beam Antenna This popular antenna for the lower bands, can also work well on 15 meters, QST Article -
Improve your 80 and 160 meter signal without a Yagi! -
This page is a short description of the four phased verticals system for 160m 80m and 40m -
A project for a ground mounted 4 square antenna by DM9EE -
This page is a short description of the four phased verticals system i've build and used. It is primarily intendend to be used on the lower bands 160m, 80m, 40m. -
N6RK receive 4 square antenna with transformer coupled antennas and true hibrid combiner -
4 Square Vertical Array website dedicated to vertical arrays antenna installations worldwide by G4ATA -
A 220-ft tower that has five catenary lines, each about 500 feet long. Four of these lines, running NE, SE, SW, and NW support four 1/4-wavelength wire verticals used in a 160-meter four-square antenna. -
4 Square K9AY Array project for 80 and 40 meters band