Li, M, Yang, Y, Xu, KD, Zhu, X & Wong, SW 2018, 'Microwave On-Chip Bandpass Filter Based on Hybrid Coupling Technique', IEEE Transactions on Electron Devices, vol. 65, no. 12, pp. 5453-5459.View/Download from: UTS OPUS or Publisher's site
© 2018 IEEE. In this paper, a novel on-chip circuit design approach is proposed using hybrid coupling technique. Taking advantage of this technique, a microwave bandpass filter (BPF) is proposed as a design example for proof of concept. Based on stub-loaded stepped-impedance transmission lines and folded stepped-impedance meander line from different metal layers, the proposed BPF can generate three transmission zeros (TZs) and two transmission poles (TPs), which are excited through the hybrid mutual couplings between the inductive and capacitive metals. To understand the principle of this configuration, an equivalent LC-circuit model is presented and simplified, of which the TZs and TPs of the proposed BPF are estimated by the extracted transfer function. The calculated results exhibit good agreements with the simulated and measured ones. In addition, the bandwidth and center frequency of the proposed BPF can be tuned flexibly. Finally, to further demonstrate the feasibility of this approach in practice, the structure is implemented and fabricated in a commercial 0.13- μm SiGe (Bi)-CMOS technology. The measurement results show that the proposed BPF, whose chip size is 0.39 mm × 0.45 mm (excluding the test pads), can realize a wide bandwidth from 19.7 to 33.2 GHz with a return loss of 15.8 dB and insertion loss of 3.8 dB at the center frequency of 26.5 GHz.
Li, M, Cai, YX, Bautista, MG, Yang, Y & Zhu, X 2018, 'Broadband on-chip bandpass filter using ring resonator with capacitive loading', 2018 Australian Microwave Symposium, AMS 2018 - Conference Proceedings, Australian Microwave Symposium, Brisbane, QLD, Australia, pp. 55-56.View/Download from: Publisher's site
© 2018 IEEE. Design of a broadband on-chip bandpass filter (BPF) using grounded ring resonator with capacitive loading technique is presented in this paper. To prove the concept, a standard 0.13-μm (Bi)-CMOS technology is selected for implementation. To understand how to effectively optimize the designed BPF, parametric studies against some critical parameters are given by means of EM simulation. Finally, the implemented filter is fabricated. The measured results show that the BPF has a center frequency at 33 GHz with a bandwidth of 42.4%. The minimum insertion loss is 2.6 dB, while the stopband rejection is maintained to be better than 20 dB beyond 58 GHz. The chip, excluding the pads, is very compact at only 0.03 mm2 (0.11 × 0.28 mm2).