The Array for Real-time Geostrophic Oceanography (ARGOS) antenna is intended for use with oceanographic instruments that transmit data through the ARGOS satellite system. The antenna is fully waterproof and is capable of withstanding submersion in sea water to 2000 meter depths for extended periods of time.

The ARGOS antenna is a coaxial dipole construction and does not require the presence of a ground plane for proper operation. The dipole is potted within a tubular fiberglass support that is itself potted into an aluminum high pressure fitting. The exterior of the antenna is covered with shrink tubing.

ARGOS Components and Features

	The base seal is a standard SAE 1/2-20 o-ringed high pressure fitting.
	The antenna has a miniature SMA connector that easily passes through the antenna seal port (1/2-20 SAE).
	Each antenna is tested at radio frequency to determine how well it matches a 50 ohm source transmitting at the ARGOS frequency of 401.650 MHz. Typical SWR.
	Smith Chart representation of the impedance seen at the dipole junction of a typical antenna over a 100 MHz frequency range.