What is EMI?

1
(No Transcript)
2
What is EMI?

• A basic working definition

• EMI (Electromagnetic Interference) is broadly
  defined as any unwanted electrical or
  electromagnetic energy that causes undesirable
  responses, degraded performance, or failure in
  electronic equipment.
• For our purposes we are usually concerned with
  radiated and conducted EMI in electronic
  equipment in command, control, information and
  communication systems.

3
Sources of EMI and EMP

• Radiated and Conducted

• High frequency devices
• Electronics/computers
• Cell phones/radios
• Wireless/RF energy
• Microwave equipment
• Power lines
• Electric motors
• Electrostatic discharge (ESD)
• Lightning (LEMP)
• Nuclear event (HEMP)
• Others

4
Electromagnetic Compatibility (EMC)

• Glenair is in the EMC business!

• In a perfect world, every electronic enclosure
  would have six (6) sides and be completely sealed
  or welded, with no holes or apertures, providing
  100 electronic shielding and containment.
• In the real world, electronic enclosures have
  doors or removable sides, switches, connectors,
  indicators and gauges, thru-bulkhead fittings,
  and other openings that need to be electrically
  closed via conductive shielding products and
  technologies

5
EMC Technologies

• Delivering clean data streams, undistorted by
  EMI,
• requires a multi-disciplinary approach

• Cable and wire shielding
• Grounding springs and pins
• Shielded boxes and cases
• Conductive platings
• Conductive gaskets
• EMI backshells
• Conduit solutions
• Capacitor and diode filter devices

6
What is a Filter Connector?

• A basic working definition

• Filter connectors use internal capacitors and
  (optionally) inductors and diodes (for EMP
  applications) to strip off unwanted noise or
  transient voltages from the signal.
• Types include tubular, planar array, chip on
  flex/board, EE seal and others
• Low-pass filters attenuate high-frequency noise
  and allow low-frequency signals to pass
• Each application environment dictates different
  capacitance values and cut-off frequencies to
  affect desired performance
• Virtually any standard connector type can be
  outfitted with filtering technology

7
Why Use a Filter Connector?

• Filters are can be a planned addition to an
  electronic package or, as frequently occurs,
  added after a problem has been discovered

• Easiest permanent EMI/EMP solution designed to
  strip off conducted EMI before it passes through
  the device.
• Variable capacitance from 500 pf to 50,000 pf
• Small package size doesnt consume PCB real
  estate.
• Can easily replace existing non-filtered
  connector.
• Mates with standard connectors 5015, 26482,
  38999, 24308, 83723, 26500, 83513, Mighty Mouse,
  ARINC, etc.
• Moves filtering away from sensitive board
  electronics when a signal barrier is needed in
  a system.
• Can shunt an unwanted electrical surge fast
  1X10-9

8
When it Comes to Filters
What Glenair CANNOT Do
FIX THE EMI PROBLEM HERE
2 PCB filter solution
1,000,000 board debug problem
9
When it Comes to Filters
What Glenair CAN Do Fix the Problem Here
300 filter solution
With no re-design necessary at board level
10
Electrical Criteria in Filter Device
Specification

• Selection of filter device types is affected
• by the electrical criteria of the equipment

• Operating temperature Range
• Working voltage
• Current rating
• Surge voltage
• Dielectric withstanding voltage
• Insulation resistance
• Frequency Range of All Effected Equipment

11
Multilayer Planar Capacitor Array

• Reduced size, weight and superior performance
  compared
• to discrete discoidal or tubular capacitors

• Most widely applied type of EMI filter
• Design utilizes rugged ceramic capacitor arrays
  and ferrite inductors in a single block
• Available with different capacitance values on
  individual pins
• Connector shell protects the array from thermal,
  mechanical and environmental damage

12
Basic Filter Array Module Elements
Architecture of the planar array enables mixed
capacitance values as well as
feed-thrus

13
Planar Array Construction

• The planar array is a monolithic block of ceramic
  containing a combination of capacitors,
  feed-thrus and ground lines/planes.

14
Common Filter Element Architectures
The mechanical architecture of the capacitor and
its inductive elements allows for optimization
for different frequency ranges of interference

• C Filter Single element filter with low self
  inductance
• Pi Filter Dual capacitors with a single
  inductive element positioned between

15
Insertion Loss Evaluation

• Measure of the degradation experienced by a
  signal when a device, such as a filter connector
  is inserted into the transmission path

• Measured in decibels (dB), insertion loss must be
  minimized in low-current electronic systems.
• Entire interconnect system contributes to
  insertion loss hence the need for grounding
  and shielding technologies.
• Insertion loss values are predictable for each
  filter type.

(Pi)
(Pi)
16
EMP/HEMP

• EMP can be produced on a large scale using a
  single nuclear device
• - Congressional Research Report

• High Electro Magnetic Pulse (HEMP) refers to the
  detonation of a nuclear bomb at a high altitude,
  which generates a very fast pulse (RF) which can
  be captured by antennas and long unshielded
  lines, damaging sensitive electronic circuitry.
  Sometimes referred to as Nuclear EMP (NEMP).
• Lightning can also generate destructive EMP. This
  is referred to as LEMP.
• Other potential sources of EMP include
  electrostatic discharge (ESD)

17
Glenairs EMP Solution Transient Voltage
Suppression (TVS) Filter Connectors

• Products meet RTCA DO-160 Requirements
  (electrical performance benchmarks for
  withstanding EMP, HEMP, lightning strike
  and other induced voltage
  surges)

• TVS technologies shunt EMP voltage transients
  directly to ground
• TVS diodes and diode modules are integrated into
  the filter connector package
• Diodes can be removed/replaced with relative ease
• Decision point can the capacitor absorb the
  surge or is a TVS device needed to reduce the
  surge or both.

18
Protecting Sensitive Circuits from EMP

• Glenair manufactured EMI/EMP Sub-Assemblies

19
Special Technical Considerations and Connector
Packaging Options

• Most filter connectors are custom.
• Some design decisions affect performance and
  compliance

• Space grade applications
• Hybrid fiber optic/electrical
• Soldering procedures vs. clips
• Lead free designs for RoHS
• Composite materials and lightning
• Hermetic sealing
• Operating temps to -55 to 125C
• Machined shells/flange location
• Clinch nuts/helicoils
• Fixed contacts vs. crimp contacts
• Variable length PC tails
• EMI grounding fingers and gaskets
• Package size issues, such as occur with the
  addition of crimp contacts or TVS diodes.
• Filtered connectors are usually system
  qualified.

20
Filter Adapters (Connector Savers)

• Non-Filtered interconnect systems can be easily
  upgraded with the addition of a go-between filter
  adapter.
• Filtered Glenair Sav-Con Adapters are installed
  between the existing plug and receptacleenabling
  filtering without having to change exiting
  connectors or box layouts
• Glenair Sav-Con Filter Adapters can be built
  for any connector series including MIL-DTL-38999,
  MIL-DTL-26482, MIL-C-83723, MIL-DTL-24308,
  MIL-C-83513, and others

21
Full Spectrum EMI/EMP Product Line

• Glenairs commitment to complete coverage
  
  of the popular filter technologies and connector
  styles

• Contact termination PCB, solder-cup, crimp, etc.
• Connector style Receptacle, Jam Nut, Box or Wall
  mount, Hermetic, Plug, Adapter, or Thru Bulkhead.
• Compatibility Intermateable with standard
  (non-filter) connectors
• Connector Series D38999, M83723, M26482, ARINC,
  M24308, M83513, etc.
• Connector types circulars, rack and panel, D-Sub
  and Micro, hybrid electrical/fiber optic, etc.

22
Standard Part Number Development

23
New Application Development

• Connector Series or Specification
• Shell Style
• Insert Arrangement
• Contact Gender
• Class
• Shell Rotation Position
• Shell Material and Finish
• Termination Style
• Temperature Tolerance
• Equipment Operating Frequency Range
• Filter Type
• Filter Capacitance
• Insertion Loss
• IR
• DWV
• Labeling and Marking

Use the Application Checklist!
24
Applications for Filter Connectors

• DO-160 High Reliability, Mission Critical Systems

• Avionics
• Missile Control Systems
• Radio Transmitters
• Fire Control Systems
• Radar and Jamming Devices
• Satellite Communications and Sensors
• Data Transmitters
• HEMP Protection
• Many Others

25
Summary Why Choose Glenair for EMI/EMP Filter
Connectors?
New for 2007 Glenair Capacitor Array Capability!

• Full-spectrum EMI capabilities Screening,
  grounding, and filtering
• Unmatched depth of knowledge and technical
  support in filter technology
• Fast turnaround on both custom and catalog
  filter connector solutions
• Turnkey filter connector cable/harness
  assemblies
• Free application engineering and design
  services
• Advanced lead-free filter packaging
• Circuit protection diodes available for all
  connector types
• Integrated circuit board real-estate within
  the filter connector envelope
• State-of-the-art test and qualification
  capabilities
• Popular multi-layer array filters available
  for every Glenair connector
• Availability Service, technical support,
  designs, stock

26
(No Transcript)