The hoa Can Not require a hidden antenna. Here is the Federal Law that says Yes You Can Install A Antenna On The Outside. This Federal Law over rules , hoa's , housing covenets , cities , counties , states and etc..
http://www.fcc.gov/mb/facts/otard.html. Hoa's are well aware of this Federal Law , and still try to Scam people into believing can not have a antenna or must hide the antenna. This Settled Law , Hoa's and etc. have challenged the Federal Law time after time in court and lost time after time in court. Yes You Can Install A Antenna.