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Capacitive-coupled Series Spoof Surface Plasmon Polaritons.

Yin JY, Ren J, Zhang HC, Zhang Q, Cui TJ - Sci Rep (2016)

Bottom Line: Two conventional H-shaped unit cells are proposed to construct a new unit cell, and every two new unit cells are separated by a gap with certain distance, which is designed to implement capacitive coupling.It is shown that the proposed structure exhibits a stopband in 9-9.5 GHz while the band-pass feature maintains in 5-9 GHz and 9.5-11 GHz.The compact size, easy fabrication and good band-pass and band-stop features make the proposed structure a promising plasmonic device in SPP communication systems.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.

ABSTRACT
A novel method to realize stopband within the operating frequency of spoof surface plasmon polaritons (SPPs) is presented. The stopband is introduced by a new kind of capacitive-coupled series spoof SPPs. Two conventional H-shaped unit cells are proposed to construct a new unit cell, and every two new unit cells are separated by a gap with certain distance, which is designed to implement capacitive coupling. The original surface impedance matching is disturbed by the capacitive coupling, leading to the stopband during the transmission of SPPs. The proposed method is verified by both numerical simulations and experiments, and the simulated and measured results have good agreements. It is shown that the proposed structure exhibits a stopband in 9-9.5 GHz while the band-pass feature maintains in 5-9 GHz and 9.5-11 GHz. In the passband, the reflection coefficient is less than -10 dB, and the transmission loss is around 3 dB; in the stopband, the reflection coefficient is -2 dB, and the transmission coefficient is less than -30 dB. The compact size, easy fabrication and good band-pass and band-stop features make the proposed structure a promising plasmonic device in SPP communication systems.

No MeSH data available.


Related in: MedlinePlus

Near-electric-field distributions of the proposed structure.(a) Simulated result at 6 GHz. (b) Simulated result at 9 GHz. (c) Simulated result at 10 GHz. (d) Measured result at 6 GHz. (e) Measured result at 9 GHz. (f) Measured result at 10 GHz.
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f9: Near-electric-field distributions of the proposed structure.(a) Simulated result at 6 GHz. (b) Simulated result at 9 GHz. (c) Simulated result at 10 GHz. (d) Measured result at 6 GHz. (e) Measured result at 9 GHz. (f) Measured result at 10 GHz.

Mentions: In order to demonstrate the transmission character visually, the near-electric-field distributions of the proposed structure are given in Fig. 9, in which (a)–(c) are the simulated near fields at different frequencies on an observation plane that is 2 mm above the structure, while (d)–(f) illustrate the corresponding measured results. The frequency points are chosen as 6, 9, and 10 GHz, representing the first passband, stopband, and the second passband, respectively. Due to the limitation of measured length, only the transmission part has been measured and the near-field distributions of the conversion part from CPW to SPP waveguide are not given in Fig. 9. From the near-field distributions, one can clearly see that the energy cannot propagate in the stopband, while the energy propagates steadily in the passband, in which we observe good agreements between the simulated and measured results. The good measurement results imply that the proposed structure is a promising device for the SPP integrated circuits and systems.


Capacitive-coupled Series Spoof Surface Plasmon Polaritons.

Yin JY, Ren J, Zhang HC, Zhang Q, Cui TJ - Sci Rep (2016)

Near-electric-field distributions of the proposed structure.(a) Simulated result at 6 GHz. (b) Simulated result at 9 GHz. (c) Simulated result at 10 GHz. (d) Measured result at 6 GHz. (e) Measured result at 9 GHz. (f) Measured result at 10 GHz.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4835726&req=5

f9: Near-electric-field distributions of the proposed structure.(a) Simulated result at 6 GHz. (b) Simulated result at 9 GHz. (c) Simulated result at 10 GHz. (d) Measured result at 6 GHz. (e) Measured result at 9 GHz. (f) Measured result at 10 GHz.
Mentions: In order to demonstrate the transmission character visually, the near-electric-field distributions of the proposed structure are given in Fig. 9, in which (a)–(c) are the simulated near fields at different frequencies on an observation plane that is 2 mm above the structure, while (d)–(f) illustrate the corresponding measured results. The frequency points are chosen as 6, 9, and 10 GHz, representing the first passband, stopband, and the second passband, respectively. Due to the limitation of measured length, only the transmission part has been measured and the near-field distributions of the conversion part from CPW to SPP waveguide are not given in Fig. 9. From the near-field distributions, one can clearly see that the energy cannot propagate in the stopband, while the energy propagates steadily in the passband, in which we observe good agreements between the simulated and measured results. The good measurement results imply that the proposed structure is a promising device for the SPP integrated circuits and systems.

Bottom Line: Two conventional H-shaped unit cells are proposed to construct a new unit cell, and every two new unit cells are separated by a gap with certain distance, which is designed to implement capacitive coupling.It is shown that the proposed structure exhibits a stopband in 9-9.5 GHz while the band-pass feature maintains in 5-9 GHz and 9.5-11 GHz.The compact size, easy fabrication and good band-pass and band-stop features make the proposed structure a promising plasmonic device in SPP communication systems.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China.

ABSTRACT
A novel method to realize stopband within the operating frequency of spoof surface plasmon polaritons (SPPs) is presented. The stopband is introduced by a new kind of capacitive-coupled series spoof SPPs. Two conventional H-shaped unit cells are proposed to construct a new unit cell, and every two new unit cells are separated by a gap with certain distance, which is designed to implement capacitive coupling. The original surface impedance matching is disturbed by the capacitive coupling, leading to the stopband during the transmission of SPPs. The proposed method is verified by both numerical simulations and experiments, and the simulated and measured results have good agreements. It is shown that the proposed structure exhibits a stopband in 9-9.5 GHz while the band-pass feature maintains in 5-9 GHz and 9.5-11 GHz. In the passband, the reflection coefficient is less than -10 dB, and the transmission loss is around 3 dB; in the stopband, the reflection coefficient is -2 dB, and the transmission coefficient is less than -30 dB. The compact size, easy fabrication and good band-pass and band-stop features make the proposed structure a promising plasmonic device in SPP communication systems.

No MeSH data available.


Related in: MedlinePlus