Electromagnetic Wave Group - Advanced Microwave and RF-SOP Technology

Apparatus for silencing electromagnetic noise

• Patent Number
  US 8,125,290 B2
• Inventor
  T.-L. Wu, T.-K. Wang, H.-H. Chuang and C.-Y. Hsieh
• Time
  Feb 01,2012
• Abstract

  Proposed is an apparatus for silencing electromagnetic noise, characterized by a plurality of centrally symmetrical ring-shaped through-via-hole crystalline units provided between a high voltage plane and a low voltage plane at a regular interval, thereby forming an omnidirectional noise suppression frequency band for reducing noise interference and electromagnetic radiation. In a first embodiment of the ring-shaped through-via-hole crystalline units, the through via holes are perpendicularly coupled between a metal plane and the low voltage plane. In a second embodiment of the ring-shaped through-via-hole crystalline units, the through via holes are perpendicularly coupled between two metal planes. Positioned at a regular interval, the through via holes enable provision of omnidirectional noise suppression frequency band, simplified design of a power plane, and reduction of production costs.