Traditional vertical whip’ antennas fitted to vehicles for high-frequency communication suffer from a ‘skip zone’, where little or no communication is obtainable in a given area. The SMC Mobile HF Loop Antenna, developed for NVIS communication across 3-15MHz, overcomes these limitations by having high radiation efficiency and no skip zone whatsoever.
Capable of automatically tuning across its frequency range in less than a 50th of a second, it is compatible with virtually any HF transceiver including frequency hopping types without the need for a separate control.
Based on the tried and tested SMC mobile NVIS loop which is in use by organizations throughout the world, this latest version incorporates a significant upgrade to ruggedized thick-walled tubing for performance and durability.
Other versions are available for:
• Vehicle roof-bar fitment with a ‘fold-down’ facility
• Side mounting on the vehicle.
The standard loop roof bar attachment is designed for roof bars 32mm x 22mm in cross section. However, attachments can be manufactured to suit your individual requirement.
In receive mode, for non-scanning/frequency hopping modes the antenna is factory-set to automatically store its tuning settings for the last tuned transmit frequency for greater receive efficiency.
However, if pre-defined by the user upon ordering it may alternatively be factory-set for the loop to operate ‘un-tuned’ in receive mode to allow wide-band reception for scanning modes such as ALE (Automatic Link Establishment) reception.
