fbpx
23.8 C
Sydney
Friday, March 29, 2024

Buy now

  • HID
  • HikVision ANPR
  • ID500014-HID-INTERCOM-26.02.2024-728x90
HomeSecurityAccess ControlAre Microwave Perimeter Zones Always Symmetrical?

Are Microwave Perimeter Zones Always Symmetrical?

23.8 C
Sydney
23.7 C
Brisbane
27 C
Canberra
15.7 C
Melbourne

RECOMMENDED

WEATHER

Sydney
clear sky
22.9 ° C
25.3 °
20.8 °
64 %
5.1kmh
0 %
Fri
22 °
Sat
24 °
Sun
23 °
Mon
24 °
Tue
27 °

Latest Articles

STAY CONNECTED

2,469FansLike
1,372FollowersFollow
0FollowersFollow

Do microwave beams always have a symmetrical cigar-shaped patterns? Also, if a detection zone is right at the limit of the sensor’s range, will there be more chance of false alarms?

A: Microwave detection zones are more or less symmetrical, though something to bear in mind when planning microwave sensor installations is that while theoretical detection patterns are symmetrical, in reality they will be distorted by ground, walls, buildings and other objects adjacent to the target area. Typically, microwave beams are as wide as they are high towards the centre, which is halfway between transmitter and receiver. The further transmitter and receiver are apart, the wider the pattern will be.

We’d say that any security sensor operating at its limits could have more chance of false alarms but it’s likely these limits have been factored in by the manufacturer – microwave is a mature perimeter security technology. Importantly, a microwave detector will be modulated to enhance signal processing to improve sensitivity while reducing the possibility of false alarms. The receiver will demodulate a microwave signal from the transmitter and, during this process, will tweak signal level in relation to the circuit threshold for an alarm using an auto gain control. A particular advantage is that microwave detectors with auto gain typically don’t require sensitivity adjustment in the field.

We’d recommend you talk to experts in the field when planning a microwave application like this – there’s plenty to think about, including range, overlap, regulations and much more.

#securityelectronicsandnetworks.com

thumbnail Walkie

AUTHOR

SEN News
SEN Newshttps://sen.news
Security & Electronics Networks - Leading the Security Industry with News and Latest Events. Providing information and pre-release updates on the latest tech and bringing it all to you daily. SEN News has been in print for over 20 years and has grown strong as a worldwide resource in digital media.

LEAVE A REPLY

Please enter your comment!
Please enter your name here