DDRR
Related wiki pages: Antennas, Gain, SWR, Front-to-back ratio, harmonics, Propagation, Bands
What is DDRR?
DDRR means Directional Discontinuity Ring Radiator
External links
- The DDRR Antenna from VE2GMI
- Build a 2 metre DDRR antenna from Antennex
| Antennas | |
| Design | Beam * Dipole * Dish or Parabola * DDRR * Log Periodic (LPDA) * Loop * Mobile and portable * Omnidirectional * Panel * Quad and Quagi * Screwdriver * Small tuned loop * Vertical * Yagi-Uda * Wire and random wire antennas |
| Installation | Antenna Tuners * Capacity hats and loading coils * Cavity filters * Coaxial Cable * Feedlines * Rotators * Towers and Masts * VK2ACY - G5RV coupler |
| Theory | Front-to-back ratio * Impedance matching * SWR * Tower design * Vertical Antenna efficiency * Wire comparison tables |