DDRR: Difference between revisions
Jump to navigation
Jump to search
(added internal and external links) |
|||
| (2 intermediate revisions by one other user not shown) | |||
| Line 1: | Line 1: | ||
Related wiki pages: [[Antennas]], [[Gain]], [[SWR]], [[Front-to- | Related wiki pages: [[Antennas]], [[Gain]], [[SWR]], [[Front-to-back ratio]], [[harmonics]], [[Propagation]], [[Bands]] | ||
==What is DDRR?== | ==What is DDRR?== | ||
| Line 6: | Line 6: | ||
==External links== | ==External links== | ||
* [http://www.orionmicro.com/ant/ddrr/ddrr1.htm The DDRR Antenna] from VE2GMI | * [http://www.orionmicro.com/ant/ddrr/ddrr1.htm The DDRR Antenna] from VE2GMI | ||
* [http://www.antennex.com/preview/2mddrr.htm Build a 2 metre DDRR antenna] from [http://www.antennex.com Antennex] | |||
{{antennas}} | |||
Latest revision as of 09:58, 9 April 2009
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 |