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Updated: Jan 29, 2026
15:25
Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
Published on: February 4, 2018
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A Surface-Mount Substrate-Integrated Waveguide Bandpass Filter Based on MEMS Process and PCB Artwork for Robotic
Yan Ding1,2, Jian Ding3, Zhe Yang4
1School of Information and Control Engineering, North China Institute of Science and Technology, Langfang 101601, China.
Micromachines
|January 28, 2026
Summary
A new compact bandpass filter (BPF) using slot-line resonators and substrate-integrated waveguide (SIW) technology enhances robotic radar reliability. This design improves out-of-band rejection, crucial for autonomous mobile robots in complex environments.
Area of Science:
- Electrical Engineering
- Microwave Engineering
- Robotics
Background:
- Autonomous mobile robots require compact and reliable perception systems.
- Millimeter-wave radar front ends are critical for robotic sensing.
- Existing filters may not meet the demands for miniaturization and performance.
Purpose of the Study:
- To propose a compact bandpass filter (BPF) for robotic millimeter-wave radar.
- To enhance out-of-band rejection and improve signal-to-noise ratio.
- To validate the filter's performance and compatibility with robotic modules.
Main Methods:
- Integration of slot-line resonators with substrate-integrated waveguide (SIW) cavities.
- Fabrication of a prototype filter operating in the 24.25-27.5 GHz band.
- Assembly onto a PCB using surface-mount technology for module validation.
Main Results:
- The proposed design increases filtering order without increasing layout area.
- Achieved sharp transmission zero at the upper stopband, enhancing out-of-band rejection.
- Measured results show low insertion loss, compact size, and wide stopband, matching simulations.
Conclusions:
- The integrated slot-line resonator and SIW filter offers a key solution for miniaturized robotic perception.
- The design significantly improves out-of-band interference suppression for robotic radar.
- Validated RF performance for bare die and packaged module integration.
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