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Linear loaded short dipole 21MHz
For my amateur radio activities on the HF bands I only have a 3.6 m wide balcony available for antennas. After some study I decided to experiment with a shortened dipole for the 15 m band
post 29 Jan 2024
Antenna 15m 21 MHz Links →
2 Eement. FOR 10-12-15MT
Poles are 5 mt length 21 mhz I use four bamboo poles for each element
3 Element Yagis Antennas for HF
Use the DK7ZB-match with 2x75-Ohm-coax for the 28-Ohm-Yagis and 2x50-Ohm-coax for the 12,5-Ohm-Yagis
Delta Quad
2 elements driven in phase inversion, single band for 15 m
25
Poles are 5 mt length 21 mhz I use four bamboo poles for each element
Use the DK7ZB-match with 2x75-Ohm-coax for the 28-Ohm-Yagis and 2x50-Ohm-coax for the 12,5-Ohm-Yagis
2 elements driven in phase inversion, single band for 15 m
Take off angle of horizontal antenna For horizontal polarization, the electric field will move sideways on a horizontal plane, while for vertical polarization it will oscillate up and down on a vertical plane