Guidance to select antenna

[drgovande]

GPS co ordinates : Lat: 31:03:50N (31.06382)
Lon: 97:23:09W (-97.38581)
ZIP code: 76502
How many TVs: One TV set
Forested area: there are tall trees and small hill in north direction.
Kind of TV set: one TV set: one Panasonic viera 50 " Plasma TV



Would you please guide me about the the type of antenna I should buy and would work good ? I hardly get any signal using rabbit ear with a convertor box.
thank you
Appreciate your help
Mr vinayak Govande