Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2005.07c
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- Pages.2386-2388
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- 2005
Micromachined ultra-wideband beamforming network for automotive radar front ends
마이크로머신 기술로 제작한 자동차 프런트엔드용 초광대역 빔성형 네트워크
- Corona-Chavez, Alonso (INAOE, Mexico) ;
- Liamas-Garro, Ignacio (School of EECS, Seoul National University) ;
- Kim, Jung-Mu (School of EECS, Seoul National University) ;
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Kim, Yong-Kweon
(School of EECS, Seoul National University)
- Published : 2005.07.18
Abstract
As anti-crash and pre-crash systems in vehicles become more extensively used, the need for high performance short-range radars is playing an increasing role. This paper presents the design of a micromachined, ultra-wideband beamformer centered at 24 GHz for automotive short-range radar systems. This beamformer is a Butler matrix designed using ultra-wideband transmission-line couplers, which consist of a multilayered structure that exhibits wider bandwidth compared to conventional microstrip branch-line couplers. The circuit has been designed on a quartz substrate, and to achieve the desired coupling, lines suspended on BCB layers located at specific parts of the circuit were used, achieving a three metal layered structure in form of wide microstrips, that give low loss and a wideband response. In this paper the design and fabrication procedure of the proposed beamformer are fully described.
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