February 25, 2026

Log-periodic antennas rely on self-similar structures to achieve extremely wideband coverage, such as from 30MHz to 3GHz. During fabrication, multiple dipoles must be arranged proportionally, and the scaling factor for the length and spacing of adjacent elements is usually set to 0.85. In operation, the signal is fed into the shortest element at the very […]

Designing a log-periodic antenna requires first determining the coverage frequency band, with its operating frequency typically ranging between 30 MHz and 3 GHz. Its structure consists of multiple parallel dipoles with gradually changing lengths. During operation, the half-wavelength corresponding to the lowest operating frequency must first be calculated and used as the physical dimension of