Microwave Intrusion Detection System
How a Microwave Intrusion Detection System works
A detection system that uses microwave beam technology to detect intrusion events in an electromagnetic field between Transmitter (Tx) and Receiver (Rx). The purpose of a Microwave Intrusion Detection System is to generate a long tall beam that accurately detects intrusion events. The systems then signal a digital alarm when an unauthorised intrusion occurs. In detail, Microwave sensors are motion detection devices that “flood” an area around the perimeter with an invisible field of Microwave Beams. Moreover, with advanced Microwave Detection Systems, this beam can be up to 10 meters in height, 200 meters in length for each link and 1 meter in width. Any movement in the protected area disturbs the field and generates an alarm. In addition, Microwave Intrusion Detection Systems are typically used in areas where there are long and flat “zones”.
Furthermore, Microwave detection systems are relatively unaffected by weather conditions. Advanced systems use Intelligent Digital Signal Processing techniques to distinguish small animals and humans. Generally, Microwave Intrusion Detection Systems also have a long life expectancy. Newer systems don’t require any manual tuning and therefore installation is trivial. Site maintenance can be high as foliage encroaching on the detection field can cause issues. However, newer systems can filter out foliage making site maintenance less of an issue. This means that the new generation has revolutionised traditional microwave making it a very attractive PIDs option in a wide range of site types.
Microwave PIDs – A New Generation
Three attributes of a microwave detection system affect how an intrusion event is “viewed” by the system;
• the operating frequency. (Operates at a lower frequency to ignore false alarms occurring from small animals, heavy weather, and foliage).
• the design of the antenna. (Uses a Planar Antenna Array to extend the active alert zone. Up to 200 meters for each link, 10 meters high, 1 meter in width).
• and the algorithms used to analyse the signal. (Different sensitivities can be set to identify and bounce intrusion types).
Making changes to these attributes has revolutionised Microwave Intrusion Detection Systems making it a much more attractive option in a wide range of sites.