Build a 2 Meter DDRR for Mobile
W5GVE's 1999 guide to building a compact 2-meter DDRR antenna for mobile ham radio operations.
Description
In 1999, W5GVE presented a detailed construction article for a 2-meter DDRR antenna, specifically designed for mobile operation. This unique antenna, a Directional Discontinuity Ring Radiator, offers a compact footprint, making it suitable for vehicular mounting where traditional quarter-wave verticals might be impractical. The design emphasizes ease of homebrewing, utilizing readily available materials and basic workshop tools, allowing radio amateurs to build an effective mobile antenna for the 144 MHz band.
The article provides insights into the antenna's performance characteristics, noting its low profile and potential for reduced wind loading compared to taller mobile whips. W5GVE's experience with the DDRR design suggests it can provide reliable communications on the 2-meter band, even in challenging mobile environments. The construction details include specific dimensions and assembly steps, guiding the builder through the process of creating a functional antenna.
This project offers a practical alternative for hams seeking a discreet yet effective 2-meter mobile antenna, potentially achieving 3 dB gain over a standard mobile whip.