EMI/EMP Filter Connectors
Transient Protection
EMI/EMP/RFI Solutions for Every Connector, Every System
Our filtering devices can be utilized on all standard and Mil-Spec circular connectors to provide durable and versatile EMI, EMP, and RFI protection for any system. Amphenol Aerospace has a filtering solution for essential signal in any land, sea, air, or space-based application.
Opting for EMI/EMP/RFI protection at the connector instead of on the board also presents valuable opportunities for weight and space savings in your system. Electing for these safeguards at the connector level also means there is no longer a need to redesign your entire system to incorporate EMI/EMP/RFI protection.
What is EMI?
EMI is when low, medium, or high-frequency electromagnetic signals interfere with a system and cause performance degradation or malfunction. Some sources of EMI include interference from radio waves, stray transmissions, electric power lines or electric motor noise, or interference between electronic components or subsystems within the same system.
It can also happen due to natural causes like lightning, radiation, solar activity, or atmospheric phenomena such as ionospheric disturbances or static electricity buildup.
There are two main types of EMI:
- Conducted EMI: Occurs when electromagnetic signals are conducted along wires or other conductive paths.
- Radiated EMI: Occurs when electromagnetic signals travel through the air or a vacuum and are picked up by a system’s input/output lines. It requires no physical connection.
Amphenol filter connectors protect against both conducted and radiated EMI by strategically orienting the internal filtering components to target different threat profiles.
What is RFI?
Like EMI, RFI is caused by electromagnetic signals, but RFI occurs within the radio frequency spectrum typically in the medium to high-frequency range above 10 kHz. RFI often occurs due to intentional radio transmissions from sources like AM/FM radio broadcasts, television signals, Wi-Fi, cellular networks, and radar systems.
What is EMP?
EMP is a short, intense burst of electromagnetic energy that can severely damage or disable electrical devices and electronic systems. EMPs can be caused naturally by lightning strikes or solar flares or can originate from man-made sources such as EMP weapons or nuclear explosions. Hardening a system against EMP is crucial for all mission-critical systems due to the enormous threat they present.
EMI Low Pass Filter Options
Amphenol EMI filter connectors utilize several types of low-pass filters to filtrate medium and high-frequency interference. These filters utilize capacitors and Planar and Ferrite Inductors to prevent unwanted signal noise which can harm a system’s functionality and performance.
- Pi Filter: Consists of two planar capacitors with a ferrite inductor installed in between that offers a steep insertion loss curve.
- C Filter: Consists of a single planar capacitor, a simple and cost-effective design that often exceeds the performance of multi-component configurations.
- C-L Filter: Consists of a single planar capacitor followed by a ferrite inductor. Best used when the source impedance is greater than the load impedance.
- L-C Filter: Consists of a ferrite inductor followed by a single planar capacitor. Best used when load impedance is greater than source impedance.
- T Filter: Consists of two ferrite inductors with a single planar capacitor installed in between. Superior high-frequency performance.
Transient Voltage Protection for EMP Defense
To defend against EMP or other abrupt releases of stored energy such as load switching, lightning strikes, or electrostatic discharge (ESD), Amphenol filter connectors are offered in configurations with transient voltage suppression (TVS) diodes or metal oxide varistors (MOVs) that shunt high current spikes to the ground. Amphenol’s transient voltage protection technology meets all aircraft performance requirements and combines traditional environmental protection provided by Mil-Spec connectors.
Block EMI and Address SWaP on eVTOL Aircraft
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Electric Vertical Takeoff and Landing (eVTOL) aircraft are poised to bring urban air mobility to cities around the world in the coming years. Large cities are also rife with all sorts of EMI and RFI caused by many types of communications and transmissions as well as power line noise, electronics, and competing systems.
Electric vehicles like eVTOLs rely heavily on sophisticated avionics and electrical systems for operation and must remain free from EMI and RFI interference in these dense urban environments.
Opting for Amphenol EMI/RFI filter connectors in your eVTOL system not only provides reliable EMI and RFI protection; the weight and space savings offered by Amphenol Filters are also ideal for the weight and space constraints needed in efficient eVTOL platforms.
Maintaining Signal Integrity No Matter the Application
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Amphenol Aerospace offers a wide variety of EMI/EMP/RFI filter options to meet almost any customer requirement. Our filter capabilities are available for a variety of Mil-Specs including MIL-DTL-38999, MIL-DTL-5015, MIL-DTO-26482, MIL-DTL-26500, and MIL-DTL-27599, and Amphenol engineers can customize any connector to meet the customers’ specifications.
Filter Connector Key Features
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| Composite Weight Savings |
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| EMP Protection |
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Options |
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| Wire Termination Methods |
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| Adapters |
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| Transient Protection Options |
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