Spiral Antenna	Click ↓	Votes ↓	Flag ↓
40m OCF Spiral Dipole This antenna is an off-center fed spiral dipole for 40 meters, based on KN9B’s spiral dipole
Archimedean Spiral Antenna for RTLSDR An Archimedean spiral made of two equal lengths of coaxial cable seems to be the easiest circularly polarized antenna to make
Petlowany Antenna Experiment It is essentially a very short dipole with spiral-wound coils at each end
Spiral antenna for RTLSDR A Vivaldi antenna is wideband and directional and the design works well for frequencies above 800 MHz
Taktenna antenna project experimental antenna similar to the TAK-tenna spiral antenna and was evaluated for SWR response over the frequency range of 7.0 to 7.3
TAK tenna for 80m My HF antenna is a TAK-tenna 80m model, which is essentially a spiral dipole
Spiral antennas theory Spiral antennas belong to the class of frequency independent antennas, these antennas are characterized as having a very large bandwidth

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