Rotationally symmetric FDTD for wideband performance prediction of TM01 DR filters

✍ Scribed by Andrew R. Weily; Ananda S. Mohan

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 196 KB
• Volume: 12
• Category: Article
• ISSN: 1096-4290
• DOI: 10.1002/mmce.10023

✦ Synopsis

The generalized perfectly matched layer (GPML) coupled with rotationally symmetric (RS)-FDTD method has been utilized to extract the S-parameters for several probe-coupled TM 01 dielectric resonator (DR) filters to directly obtain the theoretical wideband spurious performance. The computationally efficient (RS)-FDTD method has also been used to obtain accurate filter parameters for TE 01 and TM 01 dielectric resonators loaded in cylindrical cavities. The RS-FDTD method combined with digital filtering and the Matrix Pencil technique are used to analyze the resonant frequencies, inter-resonator coupling, and external Q values. When perturbation theory is used with RS-FDTD, accurate values of unloaded Q are obtained.