They are one-metre-long, upright cylinders with a one-metre antenna on top.

BBC: Cyber-sailors to survey oceans

There were just three stations to watch, and we were lucky if we could get a clear picture by adjusting the antenna on top of the TV.

FORBES: The Way We Used To Watch TV And Movies

But if that weren't enough to clue us in, you can clearly see something that looks curiously like an antenna on the top left -- in the very same place as the Korean Optimus Vu.

ENGADGET: blogger-avatar

To do this, you will need an ATSC tuner (ether built-in to the TV or a set-top box style) and an antenna.

ENGADGET: What if your cable provider doesn't have ABC in high-def? HD

First they were trying to gain room inside the iPhone 4 so that they could make it thinner and have a larger battery, and secondly, they were trying to get the antenna(s) outside of the device, just as you would by using an external antenna sticking out the top of the device.

FORBES: The iPhone 4 Antenna Unravelled

The only notable change is an articulating, telescoping antenna that screws into the top of the phone -- a sure sign that this device is nothing but a trial unit since we'd assume retail devices would have a sexier way to stow it.

ENGADGET: Samsung's Mobile DTV-enabled Moment hands-on Hands-on

The Council on Tall Buildings and Urban Habitat, a Chicago-based organization considered an authority on such records, says an antenna is something simply added to the top of a tower that can be removed.

WSJ: Spire permanently installed on WTC tower

The GPS antenna is on the back and pivots out to the top, turning on the GPS receiving capability.

FORBES: Magazine Article