Design of a T-shaped bandpass filter integrating in the corporate-feed waveguide of a waveguide slot array antenna

摘要

In this paper, we propose a waveguide slot array antenna by integration of T-shaped filters using the diffusion bonding of laminated thin metal plates. In the filter design, a T-shaped structure is adopted because a traditional in-line structure might cannot be accommodated by the limited space of the corporate feeding circuit of the antenna. Also, to effectively suppress the frequency band that not utilized for E-band communication, i.e. 76-81 GHz, a bandstop filter suitable for integration with high in-band rejection and satisfied out-of-band insertion loss is developed for filtering antenna design. In this paper, we propose a waveguide slot array antenna by integration of T-shaped filters using the diffusion bonding of laminated thin metal plates. In the filter design, a T-shaped structure is adopted because a traditional in-line structure might cannot be accommodated by the limited space of the corporate feeding circuit of the antenna. Also, to effectively suppress the frequency band that not utilized for E-band communication, i.e. 76-81 GHz, a bandstop filter suitable for integration with high in-band rejection and satisfied out-of-band insertion loss is developed for filtering antenna design.