부산대학교 도서관

Structure design and fabrication of a novel Ku/Ka shared-aperture dual-polarized low-profile multi-layer microstrip antenna array is proposed in this paper which can meet requirements of the limiting volume and weight, wide beamscanning performance and independent feeding networks. To reduce its profile height and weight, the front face of the proposed antenna array is designed as the radiating surface and the back face is designed to connect with T/ R modules directly. This antenna array consists of 240 Ku-band elements and 480 Ka-band elements distributed in the shared aperture within 185mm x 150mm. The horizontal and vertical spacing distance between Ku-band elements are both 9.2 mm and those between Ka-band elements are both 4.6 mm. Two kinds of twins' button RF connectors are proposed to realize the feeder interconnection due to the relatively small element spacing and complex welding procedure. Its whole height which includes a multi-layer microstrip, feeder connectors and a metal substrate is only 9.9mm. Antenna elements operating in two bands are designed and fabricated by using 14-layer microstrip through 5 high-precision and difficult laminations. High-precision mechanical depth control process, glue flow control process, etching auxiliary line process, shrinkage control process of ultra-thin materials and other key processes were introduced in this paper. This novel antenna array can be utilized in wireless communication system, automobile, weather monitoring, and earth observation in the future.