This week’s featured content is an article written by NexTek’s VP of Engineering, George Kauffman, and published in Defense Electronics magazine.
As military and defense programs demand more efficiency and value for the dollar, many Commercial-Off-The-Shelf components and solutions are being used in defense systems and equipment. Not only does the use of COTS parts help keep development costs and time to a minimum, it is possible to make a system that is just as reliable and high-performance as a fully custom-engineered solution.
Check out the article if you would like to learn more about using standard coaxial/RF lightning and surge protection solutions in defense applications, including the following key points;
Available Arrestor Technologies
How to Select the Proper Solution
Proper Protection Coordination
You will learn how to choose a high quality COTS solution that is suitable for the most demanding of military and defense applications!
The DO-160 Series (currently DO-160G) regulations regarding Avionics cover a wide range of test requirements that every piece of certified Avionics equipment must comply with. With the range of requirements covered under this wide-reaching document, covering everything from Temperature Range and Vibration Ratings to EMI Susceptibility and Lightning Protection. Learn more about DO-160 and it’s various subsections by following the Wikipedia link below:
NexTek Arrestors and Filters are used to address DO-160G EMI and Surge Protection Requirements, respectively.
We have Coaxial Surge Protection solutions ranging from standard Off-The-Shelf to modified or fully custom for the following subsections;
Section 17: Voltage Spike Transients
Section 19: Relay Switching Transients
Section 22: Lightning Transients
Section 25: ESD [Static] Transients
We also provide EMI Filter solutions ranging from standard Off -The-Shelf to modified or fully custom for the following DO-160G sections;
Section 18: Audio Frequency Conduced Susceptibility
Section 19: Induced Signal Susceptibility
Section 20: Radio Frequency Susceptibility
Section 21: Emission of Radio Frequency
If you are looking for assistance, guidance, or solutions for any of the DO-160G requirements listed above…NexTek has the experience, expertise, and product range to help you find the perfect solution.
Trust the Experts, NexTek has 30 Years of experience designing and providing Transient and EMI protection solutions for customers and applications around the world.
We are excited to announce the release of a brand-new Coaxial Arrestor design, the PTCTNFMMFxxS series of compact GDT arrestors. Just like other examples of NexTek’s compact arrestor options, this unit is perfect for chassis-mount applications where space is at a premium…But at the same time, it provides heavy duty, military grade protection for your equipment and will not cost much more than a high-quality connector!
If you are looking for coaxial protection that does not cost you any more space and weight than absolutely necessary, perhaps because you’d prefer to integrate protection into the Radio Chassis itself, then you really have to check out this new design!
The PTCTNFMMFxxS-series coaxial arrester provides effective protection in an extremely compact form factor, and MMCX connectors for the lowest-profile connection.
Available with a TNC (f) bulkhead and MMCX (f) connectors, in a range of Protection Voltage/RF Power ratings. See below and explore the datasheets to learn additional details!
DC to 6GHz Operating Band
Excellent Response and Residual Energy Reduction
Compact TNC to MMCX Bulkhead Protector
Low VSWR and Insertion Loss
Multi-strike, Rugged and Waterproof
Available in Multiple Protection Voltages: 90, 150, and 230V
As one of NexTek’s primary product lines, our range of Coaxial Surge Protectors is designed to cover a wide range of potential application requirements with high-performance, military-grade designs that are built using top-notch quality control systems. One of the many factors that makes NexTek’s line of solutions unique is our use of compact form factor designs and unique physical packaging to provide the optimal solution for even the tightest application!
Why are Compact Form Factors Important?: Although you may have a requirement for surge or lighting protection, sometimes the space available for installing the solution can be limited. Space could be limited because your overall radio or system is compact, or due to the fact that surge protection is being added to an existing design (i.e. a retrofit effort.)
How do NexTek Solutions Differ?: There are two major ways that NexTek’s line of arrestor products is unique from other lines that might be available. ONE – All NexTek designs are optimized to save as much size, weight, and space as reasonably possible. From our bread-and-butter high volume units to extremely compact 6GHz and 12GHz+ arrestors, our range of solutions features space-saving design. TWO – NexTek offers modified and customized versions of our standard arrestors to meet any requirements, and can even design a unique solution from the ground-up for the most challenging requirement sets.
Example of Nextek Methods: Our TNC to SMA connector surge protection product, the PTCTNFSAF20G is rated to pass RF energy up to 12GHz+. In fact, it will perform just as well as a high-quality TNC to SMA bulkhead-mount adapter in terms of Insertion Loss and VSWR…It even looks the same as a TNC to SMA bulkhead feedthrough, with a similar overall form factor, length, etc. However, due to NexTek’s extensive experience and expertise in component selection, we are able to install full-scale Lightning Protection components inside without creating any obvious physical growth relative to a non-protected bulkhead adapter.
Summary: No matter the threat type and level (Lightning, ESD, high-speed EMP,) NexTek has the experience and expertise in-house to learn your specific set of requirements and to select the ideal standard product, modify an existing product, or develop an entirely new custom solution as-needed! Contact Us for more information!
Today’s post highlights a type of Transient Threat that NexTek arrestors provide protection against. Although Lightning energy is the primary source of damage to coaxial lines and systems where they are used, there are also other types of Surge Energy that can cause damage to electronics.
ESD, or Electro-Static-Discharge, discharges can reach many kilovolts in potential and therefore could cause significant damage to most unprotected electronic equipment. Although the total energy contained within an ESD discharge is relatively low, it is the fast risetime and kilovolt+ voltage potential that are the main causes of damage.
For any application or system which uses coaxial transmission cables and connectors, there is likely to be some risk of direct human contact to an “exposed” (i.e. un-mated) coaxial center pin which in-turn makes ESD discharges directly onto the center pin quite likely. In this case, protection must be installed or afforded in order to ensure the continued performance of a given system or piece of equipment.
When examining a specific application and quantifying the ESD threat level, there are two main paths to travel down: One, the ESD threat may be given by a specific Industry Standard document (MIL-STD, IEC, IEEE, EN, etc) according to a judgement made upstream in the overall program…or an approximate threat level or desired protection level based on the program-level design requirements.
See below for a table which lists some ESD Requirements which may apply: