Description

his is a very wideband directional antenna (log‑periodic dipole array, LPDA) that can cover from 30 MHz up to ~3 GHz, which spans HF / VHF / UHF / lower microwave bands. Gain tends to vary across the band: lower frequencies (30‑100 MHz) → lower gain; higher frequencies → better gain. Impedance is typically 50 Ω. VSWR (mismatch losses) tends to be worse at extreme ends; mid‑band performance is better. Physical size is large: to cover down to 30 MHz, longest dipole elements become very big, spacing becomes large. So these antennas tend to be bulky/heavy. Directional: It helps in pointing toward a transmitter or source; not omnidirectional.