| 摘要 |
In order to provide a communication system which performs a communication while maintaining high voltage insulation, a control circuit which is operated at a low voltage, and a controlled circuit which is operated at a high voltage are connected through a propagation layer having a waveguide structure, thereby performing a communication. In particular, a displacement current (surge current) flows between a high voltage circuit and a low voltage circuit due to a potential fluctuation which occurs in the high voltage circuit A surge current protection circuit is provided, and applying an input which is out of rating to the communication module and the low voltage circuit due to such a surge current is prevented. |
| 主权项 |
1. A communication system which performs a communication between a control logic circuit which is operated using a first voltage and a circuit to be controlled which is operated using a second voltage, the system comprising:
a multilayer substrate formed by laminating, in this order:
a communication substrate layer;a metal conductor forming a first antenna;an insulating layer; anda waveguide; a first communication module mounted on the multilayer substrate, the first communication module converting a control signal from the control logic circuit to a first carrier frequency; a second antenna which receives the control signal which is converted to the first carrier frequency by passing through the first antenna and the waveguide; and a second communication module which reversely converts the control signal which is received in the second antenna, and converted to the first carrier frequency to a base band frequency, wherein the first voltage is higher than the second voltage; wherein the waveguide includes:
dielectric layers and conductor layers interposed between the dielectric layers; anda first opening portion and a second opening portion corresponding to the first and second antennas, respectively, such that the control signal arrives at the second antenna by passing through the first antenna, the waveguide, and the first and second opening portions, and wherein the insulating layer maintains DC electrical insulation between the first antenna, the second antenna, and the conductor layer of the waveguide. |
