Research Article
Automated Topology Exploration and Design of Passive Microstrip Filters Based on Grid-Like Topology
@INPROCEEDINGS{10.1007/978-3-031-96146-5_22, author={Jingyun Bi and Xinyu Zhou}, title={Automated Topology Exploration and Design of Passive Microstrip Filters Based on Grid-Like Topology}, proceedings={Smart Grid and Innovative Frontiers in Telecommunications. 8th EAI International Conference, EAI SmartGIFT 2024a, Santa Clara, United States, March 23-24, 2024, Proceedings}, proceedings_a={SMARTGIFT}, year={2026}, month={9}, keywords={Microstrip band pass filter Passive circuits RF filter Simulated annealing (SA)}, doi={10.1007/978-3-031-96146-5_22} }- Jingyun Bi
Xinyu Zhou
Year: 2026
Automated Topology Exploration and Design of Passive Microstrip Filters Based on Grid-Like Topology
SMARTGIFT
Springer
DOI: 10.1007/978-3-031-96146-5_22
Abstract
This paper proposes an automated design method for microstrip filters which comprises topology exploration and parameter optimization stages. In the topology exploration stage, a novel grid-like topology is utilized in conjunction with an efficient generation and deduplication algorithm based on VF2++ isomorphism detection, significantly expanding the available design freedom of RF filter. The parameter optimization depends on a hybrid mode combining simulated annealing and gradient optimization, reducing computation time and simplifying the design process. To validate the method’s effectiveness and practicality, a dual-band bandpass filter for 6G communication (1.8–2.7GHz and 3.4–3.7GHz) was successfully designed and implemented within 5 h (4 h of computation and 1 h of manual layout design). The electromagnetic (EM) simulation results show that the filter, within a compact size of , achieves frequency selectivity with an insertion loss below 0.6 dB in the passband, roll-off rates of 71/100 dB/GHz and 180/87 dB/GHz for the first and second frequency passbands respectively, and effective out-of-band suppression.