Electromagnetic Numerical Modelling

1
Electromagnetic Numerical Modelling

• Mark Kuisma Stan Kacmarik
• Quality Engineering Test Establishment (QETE 4)
• 16 June, 2004

2
Outline

• Aim
• Whats Changed?
• History
• What capability can modelling provide?
• Examples
• Future Direction

3
Aim

• To outline an in-house engineering support
  capability offered by QETE to DGMEPM, centring on
  Electro-Magnetic Numerical Modeling.

4
Whats Changed?

• Marriage of Info Technologies, Precision
  Technologies, Sensors
• Info Ops, Info Mgt
• Platforms Weapons all mobile data links
• Acquisition Reform, Performance Based Contracts,
  Commercial Off The Shelf equipments
• Extremely powerful Numerical modelling tools

5
Combat Capability Antenna Limited
Data Links
Electronic Warfare
Air Surveillance
Navigation
Fire Control
Surface Surveillance
6
Naval Electromagnetic Environment
Increasing data sensor requirements present
difficult challenges
7
Whats the Need ?
http//www.ids-spa.it/
8
Whats the Impact ?

• Ever increasing data transfer requirements result
  in more antennas for CF platforms
• No mechanism to predict performance, optimize
  design or placement
• Lack of available space on CF platforms

Whats the impact? I dont know?
9
The Solution
FEKO operating on Dell 2.6GHz, 2GB RAM, 15,000
rpm SCSI H/D, UPS
But no 3D Surface Models available
10
FEKO Desktop View
11
What Questions Can We Answer?

• Advance from Best Practices, Best Estimate to
• Impacts of proposed ECs
• Options Analysis of weatherdeck layout for
  optimum system or antenna performance
• Prediction of Op Impact, EMC Impact
• Prediction of Impacts to Safety
• personnel, fuels, ordnance, helos
• Visualize complex data results,
• HF to SHF

12
Why Not Brass Model?

• Expensive
• Very slow
• Predominantly HF only
• Contract to US firms
• No in-house core memory, knowledge, competency

Scale Brass Model
USN SPAWAR San Diego Jan 02
13
Longer Term
Net to Net Interferences, Spectrum
Management, Radio Frequency Safety, Electromagneti
c Compatibility Communications Interop Environment
threats incl. lightning nuclear
EMP Radiowave propagation Terrain effects
Antenna
Virtual prototyping, Integration, Thermal
analysis, Electromagnetic Interference, AC/DC
Power Quality
14
Example UHF Antenna EC 1 of 4

• Impact of moving UHF antenna?

Create Surface Model
Compartmentize the Weatherdeck
15
Example UHF Antenna EC 2 of 4
Mast faithfully replicated
16
Example UHF Antenna EC 3 of 4
1. Perform MoM analysis only once to
calculate RF Surface Currents 2. Store
result, analyse anything you want 3.
Visualize data anyway you want 4.
Retrive calculation to consider What Ifs
17
Example UHF Antenna EC 4 of 4
18
Example - SEOSS
DMSS 6-7-5 Shipboard Electro-Optical
Surveillance System
19
Example Ray Tracing
Visualize antenna radiation paths
20
Example Commanders SUV
21
Benefits

• Predict outcomes
• Get it right the first time
• Ensure systems Born Joint
• Reduce the System Procurement Risk
• Save lots of time money
• Playback option to support retrofits upgrades

22
Future Direction

• Support on-going ECs related to
• antenna selection
• weatherdeck placement
• Op Procedures of MARCORD 43-2
• Support to Operations
• FELEX
• Options Impact Analysis of
• upper structure proposals
• No tools current available
• Virtual Prototyping