Reply is late, but better late, than never....try Yagi
You can start with the simplest first: the 3 element Yagi (pictures at left & center below). Later you can build Yagi with larger number of elements (picture at right below).
Yagi Calculator: http://www.k7mem.com/Electronic_Notebook/antennas/yagi_vhf_quick.html
Yagi-Uda Antenna
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The Yagi-Uda antenna consists of a number of parallel thin rod dipole elements in a line, usually half-wave dipoles, typically supported on a perpendicular crossbar or "boom" along their centers.
There is a single driven element driven in the center, consisting of two rods, each connected to one side of the transmission line.
There are a variable number of parasitic elements (reflectors & directors). The reflectors are on one side & directors on the other side of driven element.
The parasitic elements (reflector & directors) are not electrically connected to the transmitter or receiver, and serve as resonators, re-radiating the radio waves to modify the radiation pattern.
Typical spacings between elements vary from about 1/10 to 1/4 of a wavelength, depending on the specific design.
The lengths of the directors are slightly shorter than that of the driven element, while the reflector(s) are slightly longer.
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The radiation pattern is unidirectional along the axis perpendicular to the elements in the plane of the elements, with the main lobe off the end with the directors.
Parasitic elements (reflector & directors) have a point of zero RF voltage at their center, so they can be attached to a conductive metal support at that point without need of insulation, without disturbing their electrical operation. They are usually bolted or welded to the antenna's central support boom.
The driven element is fed at center so its two halves must be insulated where the boom supports them.
Only one reflector is generally used since the improvement of gain with additional reflectors is negligible.
However increasing number of directors improves gain & directivity. Yagis have been built with up to 30-40 directors.
