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2009 News Releases




Electromagnetic emission calculations made easier

Date : 17 / 10 / 2009
Author : Jim Linton - VK3PC

An online tool that has just been released can be very useful for radio amateurs needing to comply with their licence conditions in relation to electromagnetic radiation (EMR), which is now called EME which stands for electromagnetic

Developed by Swinburne University together with EM Software and Systems, the online tool is ideal to calculate exclusion zones around antennas where radiation levels exceed safety standard limits. This requirement applies not only to amateur stations but other radio transmitters and mobile phones that operate between 3kHz and 300GHz. Safe levels of human exposure to radiation are determined by the Australian Radiation Protection and Nuclear Safety Agency (ARPNSA). The EME limit requirements for amateur stations were introduced on basically a self-assessment regime and the average home station should have no difficulty in complying with them.

The online tool, commissioned by the Australian Communications and Media Authority, has application for not only home stations, but through its exclusion zone calculator will allow people to conduct safety assessments of transmitting antennas, such as those found on boats, four wheel drive vehicles and in
radio communication networks. To calculate the zone, all users need to do is enter the antenna type, transmitter power, antenna gain and frequency band into the online tool, and it will automatically calculate the safe distance around the antenna.

The online tool can be accessed at the Australian Communications and Media Authority website by clicking the following Link


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