| 摘要 |
An antenna system designed to enhance power efficiency of a patch antenna for wireless transmission is provided. The system includes a patch antenna, a reflective plate, a transmission line, and a printed circuit board assembly. The reflective plate is arranged at the position of ¼lambda away from the patch antenna, to reflect the electro-magnetic waves, radiated behind the patch antenna. Because the antenna and the reflective plate are away from ¼lambda, the reflective signals returned to the patch antenna constructively interfere with the signal radiated from the antenna. Therefore, the provided system may strengthen the gain of the antenna. Further, the electromagnetic interference is decreased at the position close to the printed circuit board assembly behind the reflective plate.
|
