A Broadband Single-Stage Equivalent Circuit for Modeling LTCC Bandpass Filters

Abstract

Abstract-A single-stage equivalent circuit is proposed to model microwave bandpass filters (BPFs) fabricated in low-temperature co-fired ceramic (LTCC) technology up to several times its passband frequency. The equivalent circuit adopts a modified T topology with the expandable multilayer resonators to achieve an extremely large bandwidth. It can be efficiently established from the measured -parameters using direct extraction or rational approximation. As a result, the modeled -parameters for a 2.45-GHz wideband local area network (WLAN) LTCC BPF show good agreement with the measured results over a wide frequency range up to 8.5 GHz. Such a broadband model can be used to accurately predict the suppression of harmonics and interferences in system simulation of the WLAN front-end modules.Index Terms-Equivalent-circuit model, low-temperature co-fired ceramic (LTCC) bandpass filter (BPF), wideband local area network (WLAN) BPF.

Broadband scalable compact circuit model for on‐chip spiral inductors by neural network

“…High‐accuracy inductor model is vital for the success of radio‐frequency (RF) and millimeter‐wave circuit design . Considerable study works on this topic have been reported in the literature . These modeling methods of spiral inductors are generally described as numerical techniques, behavioral macromodels, and compact circuit models .…”

“…1 Considerable study works on this topic have been reported in the literature. [2][3][4][5][6] These modeling methods of spiral inductors are generally described as numerical techniques, behavioral macromodels, 7,8 and compact circuit models. 9 Numerical techniques have a large computational load, and a small change in geometrical or process parameters could require a completely new simulation.…”