Applications & Solutions

Operating up as high as 77 GHz antenna engineers regularly seek solutions to push their already great designs even further.  In today’s day and age as frequencies increase well into the mm range, electronic packages are becoming increasingly smaller making for very tightly packed designs.  The close proximity of these components to one another is now bringing about electromagnetic interference (EMI) problems such as cross-talking and RF leakage, which can cause a once well operating design to fall well below FCC regulations.


Applications

  • Long Range Forward Looking Radar - Adaptive Cruise Control (ACC)
    • Pulsed Doppler, forward looking, 3-beam switched antenna
    • 77 GHz
    • 150 Meter Range (492’)
    • ECCOSORB® MIP or Mold-in-Place technology is the process of auto-dispensing custom designed flow in place absorbers directly into a customer supplied housing.MIP absorber cast in place
  • Short Range - High Resolution Radar
    • Multiple Sensors in bumpers, connected to central processor
    • 24 GHz
    • Distance to 20 meters (65.5 feet)
    • Supports Parking Assist, Pre-Crash Detection, Stop & Go Driving, Back-Up Warning, Blind Spot Detection and Side Impact
    • ECCOSORB® GDS/SS6M absorber cut via Water Jet Cutting is a process in which a high velocity and high pressure jet of water with or without an abrasive substance is used to slice through metal or other materials. Water Jet cutting is highly precise and generally used for parts requiring greater tolerances than what a steel rule die can offer.water jet to print
       
  • High Frequency Microwave Terminations
    • Precision waveguide assemblies
    • 76.5 GHz
    • ECCOSORB® CR-124 cast to print  
  • Blind Spot Detection
    • Cavity resonances within the transmit & receive antenna area
    • 24 GHz
    • ECCOSORB® BSR-2/SS6M offered in Kiss cutting delivers precision cuts through a top layer of material (absorber and adhesive) without cutting the bottom release liner, such as a sheet of stickers. This is commonly used when cutting several different parts and the customer wishes to keep all of the parts together on one sheet or as a set.kiss-cut sets

 

 

Solutions

 
 
  • Cavity resonances at 24 GHz was causing interference with other internal components within the housing
  • An inexpensive and durable solution was required to eliminate resonances
  • An off the shelf microwave absorber was chosen after passing extensive environmental and RF testing.  It is supplied in a custom configuration with a self-adhesive backing.
 
  • Operating at 76.5 GHz an extremely small precision waveguide assembly required a termination to reduce reflections
  • Seen at right this small termination is sitting on a sheet of .25” x .25” graph paper
  • Due to the high cost of machining such a small part extensive R&D was done to eventually mold this part to shape