RF & Antenna

Free space path loss, Fresnel zones, EIRP, VSWR, dipole length, and coax loss for wireless links.

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Calculate antenna gain in dBi from aperture dimensions, frequency, and efficiency. Includes beamwidth and effective aperture area.

Calculate the required tower height for line-of-sight coverage over a given distance, accounting for earth curvature and remote antenna height.

Calculate signal attenuation from cable type, length, frequency, and connectors. Compare loss across common coax cable types.

Calculate half-wave dipole element length from target frequency. Includes quarter-wave, full-wave, and 5/8-wave lengths.

Calculate Effective Isotropic Radiated Power from transmit power, cable loss, connector loss, and antenna gain.

Calculate free space path loss (FSPL) from distance and frequency. Includes received signal power estimation.

Calculate Fresnel zone clearance radius for wireless link design. Includes earth curvature bulge and minimum antenna height.

Calculate end-to-end RF link budget from transmitter to receiver, including EIRP, path loss, and link margin.

Calculate signal travel time from distance and medium type. Includes transmission delay, RTT, and bandwidth-delay product.

Convert between VSWR, return loss, reflection coefficient, and mismatch loss. See reflected vs transmitted power.