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Numerical Investigation of a Compact Dual-Band SIW Filter Operating at 28/38 GHz for 5G Millimeter-Wave Systems
Khier Benderradji1, Boualem Hammache1, Idris Messaoudene1
1ETA Laboratory, University Mohamed El Bachir El Ibrahimi, Bordj BouArreridj 34000, Algeria.
Micromachines
|July 28, 2026
Summary
This study introduces a compact dual-band filter for 5G millimeter-wave communications, operating at 28 GHz and 38 GHz. The novel design achieves high selectivity and low loss, ideal for miniaturized 5G front-end modules.
Area of Science:
- Electrical Engineering
- Electromagnetics
- Microwave Engineering
Background:
- 5G millimeter-wave (mmWave) communication systems require compact, high-performance filtering components.
- Existing filters often struggle to meet the dual-band and miniaturization demands of 5G applications.
Purpose of the Study:
- To design and analyze a compact dual-band substrate integrated waveguide (SIW) bandpass filter for 5G mmWave frequencies (28 GHz and 38 GHz).
- To achieve high selectivity and low insertion loss in a miniaturized form factor.
Main Methods:
- Utilized shunt iris-loaded resonators integrated within an SIW cavity for dual-band operation.
- Designed the filter on a low-loss Rogers RT/Duroid 5880 substrate.
- Validated the design using Advanced Design System (ADS) simulations and an equivalent circuit model.
Main Results:
- Achieved dual-band operation at 28 GHz (1.2 GHz bandwidth) and 38 GHz (2.6 GHz bandwidth).
- Demonstrated a compact footprint of 8.5 mm × 6.2 mm.
- Obtained excellent return loss (44.2 dB at 28.1 GHz, 52.7 dB at 38.3 GHz) and low insertion loss (~0.68 dB).
Conclusions:
- The proposed compact dual-band SIW filter meets the stringent requirements for 5G mmWave front-end modules.
- The design offers a feasible solution for practical fabrication, enabling high performance and miniaturization.
