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Compact Feeding Network for Array Radiations of Spoof Surface Plasmon Polaritons.

Jun Jun Xu1,2, Jia Yuan Yin1,2, Hao Chi Zhang1,2

  • 1State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China.

Scientific Reports
|March 8, 2016
PubMed
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We developed a compact spoof surface plasmon polariton (SPP) feeding network using U-shaped particles. This network efficiently radiates SPP fields in the broadside direction, offering solutions for microwave and optical devices.

Area of Science:

  • Electromagnetics and Plasmonics
  • Metamaterials and Nanophotonics

Background:

  • Spoof surface plasmon polaritons (SPPs) are electromagnetic waves confined to corrugated metallic structures.
  • Efficiently coupling and radiating SPPs is crucial for developing compact microwave and optical devices.

Purpose of the Study:

  • To propose a novel splitter feeding network for array radiations of SPPs.
  • To demonstrate efficient broadside radiation of SPP fields using U-shaped particles.

Main Methods:

  • Utilizing coupled mode theory to analyze SPP coupling between waveguides.
  • Designing a feeding network with U-shaped particles for anti-symmetric loading.
  • Employing theoretical analysis and experimental validation.

Main Results:

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  • Achieved efficient coupling of SPP fields into two adjacent branch waveguides.
  • Demonstrated efficient broadside radiation of bound SPP modes to far fields.
  • Showcased a high integration degree for the feeding network.

Conclusions:

  • Exploited electromagnetic field mode symmetry for SPP transmission networks.
  • Proposed a method for compact power dividers and combiners.
  • Opened avenues for advanced microwave and optical system designs.