LOGGI Log-Periodic Yagi Hybrid Antenna
By W8IOThis project introduces the Loggi, a hybrid antenna merging the wide frequency coverage of log-periodic dipole arrays (LPDA) with the high gain and front-to-back ratio (F/B) of Yagi antennas. Traditional LPDAs span broad frequencies with moderate gain and low VSWR, while Yagis provide high gain and F/B over narrow bands. By analyzing high-Tau LPDA designs, it was found they could nearly match the gain of VHF/UHF Yagis while maintaining excellent patterns, F/B, and front-to-rear ratios (F/R). Optimizing specific elements for target frequencies (e.g., 144.1 MHz) led to the Loggi, which uniquely features all driven elements without passive directors or reflectors. This design effectively functions as a narrowband optimized LPDA, with front elements acting like Yagi directors and rear elements like Yagi reflectors, thus enhancing gain and directional characteristics while retaining broad frequency versatility.
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You will find this resource in 2 categories on our links directory. The title of the main category is Log Periodic and it deals mainly with Log Periodic Antennas. The resource has been on our site since Wednesday Jul 3 2024, and it has been viewed 70 times. So far no one has rated it yet. Be the first to rate it!Rate this resource
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