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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
Summary
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:
- 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.
