The size of the FV-HD30 is 20.57 inch x 12.98 inch , the HD4400 is the same size as the antenna craft U4000 36 inch x 20 inch , I recommend the U4000 UHF antenna. Radio Shack sells Antenna Craft antennas. Here is a Flat Coax that goes in doorways and windows , at
http://www.solidsignal.com , the FC-300LX. Here are places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.starkelectronic.com ,
http://www.amazon.com ,
http://www.3starinc.com ,
http://www.lowes.com