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The T2FD ( T ilted T erminated F olded D ipole ) is a general-purpose shortwave antenna developed in the late 1940s by the United States Navy . [1] [2] It performs reasonably well over a broad frequency range, without marked dead spots in terms of either frequency, direction, or angle of radiation above the horizon. Although inferior in electrical terms [3] to antennas specifically designed for given frequency bands , or optimized for directionality , its all-around performance, relatively modest size, low cost, and the fact that it does not require any complex electronic matching to operate with a standard shortwave transmitter, have made it popular in professional shortwave communications. Also, since the late 1980s, amateur radio operators and hobby shortwave listeners have 'rediscovered' this antenna, especially for broadcast receiving and for amateur two-way modes such as Morse Code and PSK31 where brute force performance is not as important as a 'steady'