Automotive Applications, Railways, Ground Transportation

The EMC development of automotive electronic systems cannot rely on the "trial and error" approach, but must be guided by the continuous development of an electromagnetic modeling know-how, to evaluate on a computer the EMC performances of a new electronic system. The trend to miniaturization and integration of circuits is evolving rapidly, making inaccessible large parts of circuits, and impossible to adjust or trim them after design. Such constraints make it difficult to take simple remedial actions at a late stage of design, but often require reconsidering the design philosophy. A design is needed that assures as much as possible that the final product performs as requested, without the need for adjustments during the prototype development phase. To ensure optimal performances in their operating frequency bands, antennas are optimized according to their environment, their location, orientation or size, by computing input impedances and radiation patterns. Several near-by antennas with different operating frequencies can be associated on the same device, making their optimization a delicate task. In the automotive industry, many antennas (AM/FM, TV, phone, keyless units) can be combined with advanced receiving systems for driver comfort (navigation systems, traffic control) and vehicle safety.

The Virtual Anechoic Chamber