Quarter-wave protective devices
9 April 2003
Circuit & System Protection
News & Events
Citel's PRC protectors use 'quarter-wave' technology. The quarter-wave stub and other mechanical elements are carefully designed according to the operating frequency band to realise a band filter (narrowband or wideband). Since the lightning surges have a low frequency spectrum (from a few hundred kHz to a few MHz) they will be filtered out from the operating frequencies.
PRC protectors provide a very high level of protection against lightning surges and have a very low residual voltage. Also, they can tolerate multiple lightning strikes and require no maintenance.
They are available for various wireless applications (different frequency range) and available connectors are: 7/16, N, TNC and direct 7/8" cable entry (bulkhead version available in all types of connectors).
Materials are: housing - copper alloy with CuZnSn finish; contact - silver-plated copper alloy (beryllium copper as option); insulation - Teflon.
Further reading:
Highest increase in global cyberattacks in two years
Information Security News & Events
Check Point Global Research released new data on Q2 2024 cyber-attack trends, noting a 30% global increase in Q2 2024, with Africa experiencing the highest average weekly per organisation.
Read more...
From QR code to compromise
Information Security News & Events
A new attack vector involves threat actors using fraudulent QR codes emailed in PDF attachments to bypass companies' phishing security measures by requiring users to scan the code with their mobile phones.
Read more...
Here’s to a SMART 2025
SMART Security Solutions
Editor's Choice News & Events
This is the final news brief from
SMART Security Solutions for 2024, and the teams would like to take this opportunity to thank our readers, advertisers and partners and wish everyone a safe and secure festive season.
Read more...
Organisations fear AI-driven cyberattacks, but lack key defences
Kaspersky
Information Security News & Events Training & Education
A recent Kaspersky study reveals that businesses are increasingly worried about the growing use of artificial intelligence in cyberattacks, with 56% of surveyed companies in South Africa reporting a rise in cyber incidents over the past year.
Read more...
ONVIF launches new online learning initiative
Training & Education Surveillance News & Events
ONVIF has released the first course in a new online learning initiative designed to promote greater knowledge and understanding of ONVIF's workings. The first “Introduction to ONVIF” course is now available.
Read more...
Axis announces ARTPEC-9 SoC
Axis Communications SA
Surveillance News & Events
Axis Communications has announced the 9th generation of its system-on-chip (SoC). ARTPEC-9 builds on and refines the capabilities and features of previous generations of the company’s in-house designed SoC, including exceptionally low bitrate, AI-powered analytics, quality imaging, and enhanced cybersecurity.
Read more...
Enhanced remote video management
Duxbury Networking
Surveillance News & Events
Duxbury Networking has announced the release of Milestone Systems’ XProtect 2024 R2 advanced video management software (VMS), offering improved remote management, optimised video performance, and further enhancing the operational efficiency of businesses across various sectors.
Read more...
SA company develops world-first safe K9 training for drug detection
Editor's Choice News & Events Security Services & Risk Management Government and Parastatal (Industry)
The Braveheart Bio-Dog Academy recently announced the results of its scientific research into training dogs to accurately detect drugs and explosives without harming either the dogs or their handlers.
Read more...
Clearing the Static: Key principles of ESD control in electronics manufacturing
Actum Electronics
Circuit & System Protection
Effectively managing electrostatic discharge is essential in electronics manufacturing to ensure not only product reliability, but also worker safety.
Read more...
2025 Southern Africa OSPAs entries now open
Technews Publishing
Editor's Choice News & Events Training & Education
Entries are now open for the 2025 Southern Africa Outstanding Security Performance Awards (OSPAs). The OSPAs are designed to be both independent and inclusive, providing an opportunity for outstanding performers, to be recognised and their success to be celebrated.
Read more...