Ok. Just seen one at walmart for like $40 buxs. 9 foot square or something. Looks like a suitable candidate. Guess you would just sew the antenna wire right into the fabric itself maybe. HOA will never know it's an antenna huh? Unless of course you raise the umbrella up to 30 feet. Not sure how to explain that to an HOA nazi enforcement officer exactly, but a market umbrella would be the way to go if you are doing a hidden antenna like this though.