Hey parker420
there are many types of antennas you can use..
likly you need for HF use..
bcrew made a good suggestion..
but do you have an area to spread that out?
also are you looking for a beam....dipole or vertical..
if dipole stick with bcrew's suggestion
if a beam i would suggest one from Steppir
www.steppir.com
(they have 2 element to 5 element depending on the space you have and bands as well as money you are willing to spend)
if it is a vertical (that would take up the least room and perhaps easiest to install..
then i would recomend again a steppir antenna
(either the BigIr or smallIr...depending on frequency's and or hight of antenna....it is quite easy to erect and install...but for best results you will need to add radials for each frequency you perfer..if on roof then laying out coax to use as radials or if on ground then coax at needed lengths for frequency to bury)..
Steppir antennas offer a unique ability (both in their beams and verticals) to run extremly low SWR's (typiclly 1 to 1 or darn close to it) without need of a tuner for 20/40 meters HF to 6 meters..
either way expect to pay $350 to $4500 depending on the antenna if you want really good results..
myself i would recoment Steppir's beams (if you have the room and willing to spend a bit...lol )
Later