Antenna Design and Results
Any time you get a stick up in the air, you'll get some generally fair to good results on most bands. The fact is, however, that you can get downright spectacular results with the right antenna. A 5/8th is a good choice for most applications. In practice, it gives about 2.15db gain over a quarter wave, and has a lower radiation angle. A 5/8th for 854Mhz is about 8.2 inches, and needs a matching coil at the base. A better choice still is a collinear array, which features a stack of resonant conductors with matching coils between. The 854Mhz antenna on the roof of my house is a 5/8-wave stacked above a 1/2-wave. Reception of the 854Mhz OKWIN system since I switched to this antenna has more than doubled - I am hearing the towers in Lexington, Tecumseh, Tishomingo, and Shawnee, where I could only reliably hear the Ada node of the system before. Antennas like this are available for mobile applications as well. Most dual-band amateur radio mobile antennas are collinear arrays.
-Richard, kc5tfz
http://richardbarron.net/