This has gotten a bit tangled-up and contentious. There are no "HDTV antennas"; there are VHF and/or UHF antennas. HDTV can be broadcast by either a VHF or UHF station(note Jeff Kohn's reply)although in many areas they tend to be UHF at this time. Get an appropriate antenna( note the excellent antennaweb.org site mentioned by Jason).

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Enjoy the music, not the equipment.