lilaclily wrote: It seems that I need a small multidirectional antenna.. ?
In that case, definitely try a set of rabbit ears first. Try Radio Shack. If they don't do the trick you can return them. All OTA antennas connect to the antenna coax connector on the back of the TV. Yes, they all still have one.
Most antennas are passive. They use no electricity. Some are amplified, and use a small amount of power from a wall wart. Amplified antennas can be helpful to boost the signal in fringe areas.
From the AntennaWeb site:
Go to AntennaWeb.org, select "Choose an antenna" and enter your address, housing type, and surroundings details. When looking at the results page, select "show digital stations only". The type of antenna needed for each DTV station is listed in the left hand column. If AntennaWeb shows the colors blue or violet are needed for an outside antenna to get a particular station then it is virtually certain that an indoor antenna will not work for that station. If it shows light green it is unlikely that an indoor antenna will enable reception of that station. However, if AntennaWeb shows red, then perhaps an amplified indoor antenna will enable reception of that station, but it may be tricky. If it predicts that you will need a yellow or green antenna then there is a good chance that, depending on your specifics, the right indoor antenna will work.