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"Rabbit ears" dipole variant for VHF television reception
"Rabbit ears" dipole variant for VHF television reception
Two-element turnstile antenna for reception of weather satellite data, 137 MHz. Has circular polarization.
Two-element turnstile antenna for reception of weather satellite data, 137 MHz. Has circular polarization.
Quarter-wave whip antenna on an FM radio for 88–108 MHz
Quarter-wave whip antenna on an FM radio for 88–108 MHz
Rubber ducky antenna on 446 MHz UHF walkie-talkie with rubber cover removed.
Rubber ducky antenna on 446 MHz UHF walkie-talkie with rubber cover removed.
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UHF half-wave dipole
UHF half-wave dipole
Dipole antenna used by the radar altimeter in an airplane
Dipole antenna used by the radar altimeter in an airplane
Cage dipole antennas in the Ukrainian UTR-2 radio telescope. The 8 m by 1.8 m diameter galvanized steel wire dipoles have a bandwidth of 8–33 MHz.
Cage dipole antennas in the Ukrainian UTR-2 radio telescope. The 8 m by 1.8 m diameter galvanized steel wire dipoles have a bandwidth of 8–33 MHz.
Length reduction factor for a half-wave dipole to achieve electrical resonance (purely resistive feedpoint impedance). Calculated using the induced EM
Length reduction factor for a half-wave dipole to achieve electrical resonance (purely resistive feedpoint impedance). Calculated using the induced EMF method, an approximation that breaks down at larger conductor diameters (dashed portion of graph).