| Summary: | 碩士 === 國立交通大學 === 電信工程研究所 === 101 === In this thesis, we will propose a high gain 45-degree polarization compound slot pair SIW (substrate integrated waveguide) array antenna design for a long-range vehicle collision avoidance warning radar.
Substrate integrated waveguide has advantage of low-loss and it is also easy to integrated with circuit.
This antenna is a double-layer substrate structure, and feed line layer are separated from the antenna layer to reduce the area of the antenna. With microstrip line central-fed structure, it can avoid the beam offset, increasing the antenna pattern bandwidth.
The operating frequency of this antenna is from 76 to 77GHz, and it detects long distance and angle. The characteristics of this antenna are narrow beam and high gain. The beam width covers from plus eight degrees to minus eight degrees. Moreover, with 45-degree polarization, it can reduce the interference from opposite lane. The design of compound slot can increase the array design varieties, and improve the gain of the array.
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