Many information
http://www.kyes.com/antenna/rabbitear.html
A Turnstile antenna with a reflector underneath it makes a good antenna for space communications because it produces a circularly polarized signal pattern and also has a broad, high angle pattern.
http://www.wb8erj.com/turnstile_antenna.htm
http://www.kyes.com/antenna/stacking.html
HQA Design for FLTSATCOM and SPACE SHUTTLE reception hybrid quad reflector array with approx. 6 dBd gain
http://members.aol.com/dj0my/hybrid.htm
An antenna for 2 meters FM (146-148 MHz), vertically polarized, and omni-directional.
http://www.antennex.com/preview/2mddrr.htm
transmitting antenna tuned for 89 MHz.
http://www.solorb.com/gfc/elect/microfm/jpole.gif
Basic description about commonly used antennas at home for radio and tv reception. This includes dipole, yagi, telescopic and other general antennas. Also describes some fraud antennas. Interresting!
http://www.kyes.com/antenna/antennatypes/antennatypes.html
This is a quarter wavelength resonator based duplexer design.
http://www.repeater-builder.com/rbtip/2mduplexer.html