Image: Harold E Holt Naval Base

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Description: Naval Communication Station Harold E. Holt near Exmouth, Western Australia. The radio masts are part of a large wire antenna which is used to transmit very low frequency (VLF) radio waves to communicate with submerged submarines. This type of antenna is known as a "Goliath", a type of umbrella antenna, but has been heavily modified. It consists of a ring of steel masts which support a network of horizontal cables radiating from the central mast. The central mast acts as the radiating element, while the horizontal cables serve as a capacitive top-load, creating a large capacitor with the ground. This serves to increase the current in the central radiator, increasing the radiated power.
Title: Harold E Holt Naval Base
Credit: Own work
Author: Nachoman-au
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC-BY-SA-3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0/
Attribution Required?: Yes

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