Last weekend, after a day of meetings, I wandered around downtown Ottawa. When I lived there in 1999-2000, I noticed that a number of light poles in the downtown area have directional antennas on top of them. I had only seen them in the vicitinty of Parliament Hill. Being paranoid, I wondered what they were. I even called the city and asked what they were and whose they are. The city was not able to answer my question, though they acknowledged that the poles are theirs and putting anything on them would require the city's ok.
You can read the text on the label on the back, which says it's made by TIL-TEK, model TA-2408. The TIL-TEK brochure describes it as:
The TA-2408 is a vertically or horizontally polarized panel antenna. The antenna consists of a printed broadband dipole array enclosed in an aluminum cavity with a UV stabilized ASA radome for superior weatherability. It is designed for wireless data in the ISM band and is at DC ground to aid in lightning protection.
Here are two other pictures:
If anyone knows anything about these, please help satisfy my curiosity ... Email me or put something in the comments.