17 meter Moxon by AE6AC
A friend of mine, Steve Hammer K6SGH introduced me to the Moxon Wire Beam antenna last year in 2004. He had a 17m Moxon hanging at about 35’ from a large eucalyptus tree in his yard.
http://www.moxonantennaproject.com/ae6ac/ae6ac.htm

3 + 3 El. Yagi for 12/17 Mt by IK4DCS
This English web page is still under construction.
The measures and drawing are already available.
http://www.qsl.net/ik4dcs/yagieng.html

A Hanging Rectangular Loop Antenna by KT4QW
This page describes a rotatable hanging loop antenna that has been specifically designed for hanging in a tree... Horizontally polarized with a broad azimuth pattern and gain of nearly 3dB over a simple horizontal dipole!
http://kt4qw.com/acan1.htm

An Hexagonal Beam in 3 hours.. by EI7BA
Over the last few years, I have heard guys using Hexbeam antennas. As this antenna was new to me, I got a few of these stations to rotate their beams so I could see the front-to-back ratio.
http://www.iol.ie/~bravo/ahexbeam.htm

Monoband 3 El. Yagi for 17 Mt by IK4DCS
After many years of home-self construction and many pounds of aluminium passing under my hands, my skill has been making progress either concerning type and weight of the material used.
http://www.qsl.net/ik4dcs/mono_18eng.htm

Rotary Dipole for 12/17 Mt by IK4DCS
After all the experiments on the WARC bands self-made antennas I had just to try with a coax-cable-trapped rotating dipole.
http://www.qsl.net/ik4dcs/dip1217_eng.htm