Concept, Theory, Design, and Applications of Spoof Surface Plasmon Polaritons at Microwave Frequencies

Tang, Wenxuan; Zhang, Hao Chi; Feng, Hui; Jiang, Wei; Cui, Tie Jun

doi:10.1002/adom.201800421

Cited by 177 publications

(66 citation statements)

References 99 publications

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“…The absence of material substrates in these fully metallic structures is quite beneficial because of the consequent reduction of losses. It leads to potential applications in microwave and photonics technology, not only for circuit devices [5] but also for antenna applications where the bounded waves are converted to leaky waves, responsible for highly directive radiation features [6].…”

Section: Introductionmentioning

confidence: 99%

Wave Propagation in Periodic Metallic Structures with Equilateral Triangular Holes

et al. 2020

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This paper studies wave propagation in a periodic parallel-plate waveguide with equilateral triangular holes. A mode-matching method is implemented to analyze the dispersion diagram of the structure possessing glide and mirror symmetries. Both structures present an unexpected high degree of isotropy, despite the triangle not being symmetric with respect to rotations of 90°. We give some physical insight on the matter by carrying out a modal decomposition of the total field on the hole and identifying the most significant modes. Additionally, we demonstrate that the electrical size of the triangular hole plays a fundamental role in the physical mechanism that causes that isotropic behavior. Finally, we characterize the influence of the different geometrical parameters that conform the unit cell (period, triangle size, hole depth, separation between metallic plates). The glide-symmetric configuration offers higher equivalent refractive indexes and widens the stopband compared to the mirror-symmetric configuration. We show that the stopband is wider as the triangle size is bigger, unlike holey structures composed of circular and elliptical holes where an optimal hole size exists.

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Section: Introductionmentioning

confidence: 99%

Wave Propagation in Periodic Metallic Structures with Equilateral Triangular Holes

et al. 2020

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“…Hence, planar LWAs based on double conductors are limited in the applications of millimeter/sub‐millimeter wave communication and terahertz systems. Spoof surface plasmon polaritons (SSPPs) TLs provide a good solution to solving OSB and energy loss problems 11 …”

Section: Introductionmentioning

confidence: 99%

Continuous scanning leaky‐wave antenna utilizing second‐mode spoof surface plasmon polaritons excitation

Zhong

Hou

2020

Int J RF Microw Comput Aided Eng

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Continuous scanning leaky-wave antenna (LWA) based on second-mode spoof surface plasmon polaritons (SSPPs) excitation has been proposed and validated in this article. Different from the existing modulation methods, connecting axisymmetric rectangular modulation is adopted to excite the −first harmonic. In this way, the slow-wave bound on the surface of the transmission line is converted into a radiation wave in space. To the authors' knowledge, this is the first presentation of LWA design utilizing second-mode SSPPs excitation. In the range from 5.0 to 9.0 GHz, the proposed LWA realizes continuous scanning from −54 ~1 1 with a quasi-omnidirectional beam in the vertical plane. A prototype of the proposed antenna is fabricated and measured, and the measured results show good agreement with the simulated. The proposed LWA has potential applications in communication systems and radars.

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“…Meanwhile, it can also possess dispersion characteristic with certain cut-off frequency similarly to the natural surface plasmon polariton, which will benefit the frequency band tailoring with a wide stopband. Therefore, various types of SSPP structures and functional devices in microwave components have been developed [3]- [14] including filters [4]- [7], antennas [9]- [11], splitters [12]- [13] and so on. Among these studies, the symmetrically monometallic SSPP structures could support the odd-mode EM wave with equal-amplitude and reversephase signal [14].…”

Section: Introductionmentioning

confidence: 99%

Differential Signal Propagation in Spoof Plasmonic Structure and its Application in Microwave Filtering Balun

Chen

Zhao

et al. 2020

IEEE Access

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In this paper, a filtering balun is proposed based on spoof surface plasmon polariton (SSPP) structure which composes of symmetric H-shaped periodic metallic strip, two types of microstrip-slotline cross-coupling structures and the transition structure between them. The SSPP structure is applied to support odd mode propagation with 180º phase difference and equal magnitude along both sides of the symmetric line, which could transmit the differential signal required for a microwave balun. And then, a new approach for effectively stimulating the odd mode of symmetric H-shaped SSPP structure based on waveguided slotline with a gradient transition structure is proposed and analyzed in detail. In addition, the dispersion characteristic of SSPP can intrinsically bring filtering feature with wide stopband in the balun design. Meanwhile, the two forms of microstrip-slotline cross-coupling structures can not only feed guided wave and realize a pair of balanced ports, but also improve the out-of-band rejection below the objective filtering band. For demonstration, a prototype filtering balun with operating frequency around at 2 GHz is designed, fabricated, and measured. The measured results agree well with the simulated ones which validate the proposed design method and reveal certain advantages of low insertion loss, good amplitude balance and out-of-phase performance as well as the wide stopband. INDEX TERMS Filtering balun, microstrip to slotline transition, odd mode, spoof surface plasmon polariton (SSPP)

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Concept, Theory, Design, and Applications of Spoof Surface Plasmon Polaritons at Microwave Frequencies

Cited by 177 publications

References 99 publications

Wave Propagation in Periodic Metallic Structures with Equilateral Triangular Holes

Wave Propagation in Periodic Metallic Structures with Equilateral Triangular Holes

Continuous scanning leaky‐wave antenna utilizing second‐mode spoof surface plasmon polaritons excitation

Differential Signal Propagation in Spoof Plasmonic Structure and its Application in Microwave Filtering Balun

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