A new version of transverse magnetic (TM) cavity filters for high-frequency applications is presented in this letter. The basic building block of these filters is the over-moded transverse magnetic cavity (OTMC). The OTMC supports a pair of high-order resonant modes, namely TM 320 and TM 230 , as well as various nonresonating modes that can be exploited to provide an additional input-to-output path (the propagating TM 11 is the one primarily employed in the particular configuration here presented). Besides the possibility of realizing elliptic responses having the maximum number of transmission zeroes, a higher Q-factor as well as a significantly reduced sensitivity to manufacturing imperfections is the main benefit making these structures especially suitable for the practical realization of very narrowband millimeter-wave filters. The experimental results of an elliptic fourth-order OTMC filter with 0.2% fractional bandwidth at 41.415 GHz validate the feasibility of these new transverse magnetic filters.
Over-Moded Transverse Magnetic Cavity Filters for Narrowband Millimeter-Wave Applications
Bastioli S.;Tomassoni C.
2019
Abstract
A new version of transverse magnetic (TM) cavity filters for high-frequency applications is presented in this letter. The basic building block of these filters is the over-moded transverse magnetic cavity (OTMC). The OTMC supports a pair of high-order resonant modes, namely TM 320 and TM 230 , as well as various nonresonating modes that can be exploited to provide an additional input-to-output path (the propagating TM 11 is the one primarily employed in the particular configuration here presented). Besides the possibility of realizing elliptic responses having the maximum number of transmission zeroes, a higher Q-factor as well as a significantly reduced sensitivity to manufacturing imperfections is the main benefit making these structures especially suitable for the practical realization of very narrowband millimeter-wave filters. The experimental results of an elliptic fourth-order OTMC filter with 0.2% fractional bandwidth at 41.415 GHz validate the feasibility of these new transverse magnetic filters.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
