An ultra‐wideband out‐of‐phase power divider based on odd‐mode spoof surface plasmon polariton

Abstract

In this article, a feasible design of an ultra‐wideband power divider (PD) based on spoof surface plasmon polariton (SSPP) is proposed. A quasi T‐junction transmission structure is composed of the sub‐wavelength corrugated grooves drilled on the up metal layer, realizing the wideband and low loss for the propagation of the odd‐mode SSPP wave. The consistency of the dispersion curves between the H‐shaped and the U‐shaped unit cells under the same dimension parameters ensures the smooth transition at the bifurcation point and out‐of‐phase property further. The odd‐mode SSPP is effectively excited by using the microstrip‐to‐slotline convertor. Some design details like gradient corrugations and stepped slotlines are employed to achieve high‐coupling efficiency from the input electromagnetic energy. The simulated and measured results show that the proposed PD achieves 180° ± 5° phase difference over an ultra‐wideband from 3.3 to 9.8 GHz (a relative bandwidth of 99.24%) with high‐transmission efficiency. The ultra‐wideband out‐of‐phase property of this design has potential applications in the differential feed network.

Balanced Filtering Power Divider based on Odd-mode Hybrid Microstrip and Slotline Spoof Surface Plasmon Polaritons

“…Recently, the multifunctional integrated devices, such as filtering power dividers (FPDs) have been widely reported, which can not only achieve power distribution and frequency selection functions simultaneously but also avoid the additional power loss and size increase caused by the devices cascade [18][19][20][21][22][23]. Hence, several FPDs are proposed based on SSPP structure fed by CPW [18], slotline SSPP unit cells [19,20], and hybrid SSPP and substrate integrated waveguide (SIW) structures [21][22][23]. In [19], an ultra-wideband FPD is designed based on the quasi Y-junction slotline SSPP transmission line constructed by the corrugated grooves.…”

Design of compact and broadband filtering balun based on N-shaped spoof surface plasmon polaritons

“…In [23], a novel wide stopband filtering balun is proposed by using the odd mode of symmetric SSPP strip, but its bandwidth needs to be improved. In [24], a broadband filtering balun based on odd-mode SSPP is reported. Although it achieves an ultra-broad fractional bandwidth (FBW) of 99.24%, it occupies a large physical space and cannot reach an effective bandpass filtering response.…”

“…Although it achieves an ultra-broad fractional bandwidth (FBW) of 99.24%, it occupies a large physical space and cannot reach an effective bandpass filtering response. In addition, the SSPP waveguides in [22,23,24] consist of conventional rectangle-shaped unit cells, so there is limited freedom to regulate the dispersion characteristics. Moreover, it is necessary to miniaturize the sizes of rectangle-shaped SSPP unit cells [25,26].…”

A band‐stop filter based on spoof surface plasmon polaritons using complementary split‐ring resonators

“…[3][4][5] It has been proved that SSPP transmission lines (TLs) have a much smaller loss, crosstalk, and mutual coupling than traditional TLs like microstrip lines and coplanar waveguides (CPWs). 6,7 Due to these features, SSPPs have been extensively employed in the microwave and terahertz devices, such as filters, 8 leaky wave antennas, 9 circulators, 10 low radar crosssection antennas, 11 power dividers, 12 and delay lines. 13 Ultra-wideband (UWB) filters play an essential role in UWB wireless communication systems.…”