Compact bandpass pixelated microwave filters with short-circuited stubs via inverse design
Pixelated RF metasurfaces are poised to revolutionize electromagnetic component design by enabling compact, versatile, high-performance solutions. Building upon our prior work in random metasurface-based filters and inverse design methods, we propose pixelated notch filters by integrating shorted st...
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          | Published in | Scientific reports Vol. 15; no. 1; pp. 25606 - 8 | 
|---|---|
| Main Authors | , , , | 
| Format | Journal Article | 
| Language | English | 
| Published | 
        London
          Nature Publishing Group UK
    
        15.07.2025
     Nature Publishing Group Nature Portfolio  | 
| Subjects | |
| Online Access | Get full text | 
| ISSN | 2045-2322 2045-2322  | 
| DOI | 10.1038/s41598-025-10666-y | 
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| Abstract | Pixelated RF metasurfaces are poised to revolutionize electromagnetic component design by enabling compact, versatile, high-performance solutions. Building upon our prior work in random metasurface-based filters and inverse design methods, we propose pixelated notch filters by integrating shorted stubs within a top ground plane. Using a combination of established optimization techniques, including direct binary search optimization, genetic algorithms, and a randomization mutation algorithm, we synthesize filters enhanced by parallel short-ended feed schemes, which are shown to improve stopband response. Design iterations are automated via Python scripting, commercial full-wave simulations, and Visual Basic within the electromagnetic solver, overcoming initial seeding challenges and enabling innovative pattern-generation techniques. For implementation, laser ablation is employed to precisely remove copper on PCBs, streamlining fabrication on Rogers Kappa 438 substrates. Preliminary results demonstrate the ability of the approach to reach target insertion loss levels with compact geometries, advancing pixelated metasurface-based filter design with enhanced tunability and overall performance. | 
    
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| AbstractList | Pixelated RF metasurfaces are poised to revolutionize electromagnetic component design by enabling compact, versatile, high-performance solutions. Building upon our prior work in random metasurface-based filters and inverse design methods, we propose pixelated notch filters by integrating shorted stubs within a top ground plane. Using a combination of established optimization techniques, including direct binary search optimization, genetic algorithms, and a randomization mutation algorithm, we synthesize filters enhanced by parallel short-ended feed schemes, which are shown to improve stopband response. Design iterations are automated via Python scripting, commercial full-wave simulations, and Visual Basic within the electromagnetic solver, overcoming initial seeding challenges and enabling innovative pattern-generation techniques. For implementation, laser ablation is employed to precisely remove copper on PCBs, streamlining fabrication on Rogers Kappa 438 substrates. Preliminary results demonstrate the ability of the approach to reach target insertion loss levels with compact geometries, advancing pixelated metasurface-based filter design with enhanced tunability and overall performance. Pixelated RF metasurfaces are poised to revolutionize electromagnetic component design by enabling compact, versatile, high-performance solutions. Building upon our prior work in random metasurface-based filters and inverse design methods, we propose pixelated notch filters by integrating shorted stubs within a top ground plane. Using a combination of established optimization techniques, including direct binary search optimization, genetic algorithms, and a randomization mutation algorithm, we synthesize filters enhanced by parallel short-ended feed schemes, which are shown to improve stopband response. Design iterations are automated via Python scripting, commercial full-wave simulations, and Visual Basic within the electromagnetic solver, overcoming initial seeding challenges and enabling innovative pattern-generation techniques. For implementation, laser ablation is employed to precisely remove copper on PCBs, streamlining fabrication on Rogers Kappa 438 substrates. Preliminary results demonstrate the ability of the approach to reach target insertion loss levels with compact geometries, advancing pixelated metasurface-based filter design with enhanced tunability and overall performance.Pixelated RF metasurfaces are poised to revolutionize electromagnetic component design by enabling compact, versatile, high-performance solutions. Building upon our prior work in random metasurface-based filters and inverse design methods, we propose pixelated notch filters by integrating shorted stubs within a top ground plane. Using a combination of established optimization techniques, including direct binary search optimization, genetic algorithms, and a randomization mutation algorithm, we synthesize filters enhanced by parallel short-ended feed schemes, which are shown to improve stopband response. Design iterations are automated via Python scripting, commercial full-wave simulations, and Visual Basic within the electromagnetic solver, overcoming initial seeding challenges and enabling innovative pattern-generation techniques. For implementation, laser ablation is employed to precisely remove copper on PCBs, streamlining fabrication on Rogers Kappa 438 substrates. Preliminary results demonstrate the ability of the approach to reach target insertion loss levels with compact geometries, advancing pixelated metasurface-based filter design with enhanced tunability and overall performance. Abstract Pixelated RF metasurfaces are poised to revolutionize electromagnetic component design by enabling compact, versatile, high-performance solutions. Building upon our prior work in random metasurface-based filters and inverse design methods, we propose pixelated notch filters by integrating shorted stubs within a top ground plane. Using a combination of established optimization techniques, including direct binary search optimization, genetic algorithms, and a randomization mutation algorithm, we synthesize filters enhanced by parallel short-ended feed schemes, which are shown to improve stopband response. Design iterations are automated via Python scripting, commercial full-wave simulations, and Visual Basic within the electromagnetic solver, overcoming initial seeding challenges and enabling innovative pattern-generation techniques. For implementation, laser ablation is employed to precisely remove copper on PCBs, streamlining fabrication on Rogers Kappa 438 substrates. Preliminary results demonstrate the ability of the approach to reach target insertion loss levels with compact geometries, advancing pixelated metasurface-based filter design with enhanced tunability and overall performance.  | 
    
| ArticleNumber | 25606 | 
    
| Author | Jia, Wei Gomez, Miguel A. Blair, Steve Sensale-Rodriguez, Berardi  | 
    
| Author_xml | – sequence: 1 givenname: Miguel A. surname: Gomez fullname: Gomez, Miguel A. organization: Department of Electrical and Computer Engineering, The University of Utah – sequence: 2 givenname: Wei surname: Jia fullname: Jia, Wei email: happywei.jia@utah.edu organization: Department of Electrical and Computer Engineering, The University of Utah – sequence: 3 givenname: Steve surname: Blair fullname: Blair, Steve organization: Department of Electrical and Computer Engineering, The University of Utah – sequence: 4 givenname: Berardi surname: Sensale-Rodriguez fullname: Sensale-Rodriguez, Berardi email: berardi.sensale@utah.edu organization: Department of Electrical and Computer Engineering, The University of Utah  | 
    
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/40664757$$D View this record in MEDLINE/PubMed | 
    
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| Keywords | Shorted stub filters RF filter design Bandpass filters Laser ablation Pixelated metasurfaces Inverse design Notch filters Microwave engineering  | 
    
| Language | English | 
    
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| Snippet | Pixelated RF metasurfaces are poised to revolutionize electromagnetic component design by enabling compact, versatile, high-performance solutions. Building... Abstract Pixelated RF metasurfaces are poised to revolutionize electromagnetic component design by enabling compact, versatile, high-performance solutions....  | 
    
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| SubjectTerms | 639/166/987 639/766/25 Algorithms Bandpass filters Design Fabrication Filters Genetic algorithms Humanities and Social Sciences Inverse design Laser ablation Microwave engineering multidisciplinary Mutation Notch filters Optimization algorithms Optimization techniques Pixelated metasurfaces Science Science (multidisciplinary) Simulation  | 
    
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| Title | Compact bandpass pixelated microwave filters with short-circuited stubs via inverse design | 
    
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