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Old 30-Apr-2019, 2:25 PM   #13
Retired A/V Tech
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,708
Originally Posted by bobsgarage View Post
Okay Rabbit, have you ever seen two antennas put together like that?
The closest to that I've seen is a double-ended VHF-High Yagi. It has the driven element in the center and directors on each end, but no reflectors.

I can't find the poster's image right now, but holl_ands did model a similar antenna:

The two directions are combined in the antenna.

This antenna IS bi-directional; it has more gain than a bi-directional dipole, but less gain than the Stellar Labs 30-2475. It still has the potential problem of co-channel interference from the two directions.
Attached Images
File Type: jpg Bi-Directional Yagi.jpg (53.0 KB, 803 views)
File Type: jpg Bi-Directional Yagi Pattern.JPG (94.6 KB, 763 views)
If you can not measure it, you can not improve it.
Lord Kelvin, 1883

Last edited by rabbit73; 30-Apr-2019 at 3:15 PM.
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