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Novel Dielectric Resonator-Based Microstrip Filters with Adjustable Transmission and Equalization Zeros

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Vydáno v:Electronics vol. 14, no. 13 (2025), p. 2557-2589
Hlavní autor: Espinosa-Adams, David
Další autoři: Llorente-Romano, Sergio, González-Posadas Vicente, Jiménez-Martín, José Luis, Segovia-Vargas, Daniel
Vydáno:
MDPI AG
Témata:
Insertion loss
Cavity resonators
Simulation
Equalization
Satellite communications
Intermediate technology
Bandwidths
Radar receivers
Design
Measurement techniques
Cross coupling
Group delay
Manufacturing
Superhigh frequencies
Electronic filters
Configurations
Microstrip devices
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Abstrakt:This work presents a comprehensive technological study of dielectric resonator-based microstrip filters (DRMFs), encompassing the design, fabrication, and rigorous characterization of the <inline-formula>TE01δ</inline-formula> mode. Through systematic coupling analysis, we demonstrate filters featuring novel input–output coupling techniques and innovative implementations of both transmission zeros (4-2-0 configuration) and equalization zeros (4-0-2 configuration), specifically designed for demanding space and radar receiver applications, while the loaded quality factor (<inline-formula>QL</inline-formula>) and insertion loss do not match those of dielectric resonator cavity filters (DRCFs), our solution significantly surpasses conventional microstrip filters (MFs), achieving <inline-formula>QL</inline-formula>> 3000 compared to typical <inline-formula>QL</inline-formula>≈ 200 for coupled-line MFs in X-band. The fabricated filters exhibit exceptional performance as follows: input reflection (<inline-formula>S11</inline-formula>) below −18 dB (4-2-0) and −16.5 dB (4-0-2), flat transmission response (<inline-formula>S21</inline-formula>), and out-of-band rejection exceeding −30 dB. Mechanical tuning enables precise control of input–output coupling, inter-resonator coupling, cross-coupling, and frequency synthesis, while equalization zeros provide tailored group delay characteristics. This study positions DRMFs as a viable intermediate technology for high-performance RF systems, bridging the gap between conventional solutions.
ISSN:2079-9292
DOI:10.3390/electronics14132557
Zdroj:Advanced Technologies & Aerospace Database