Half-spaced substrate integrated spoof surface plasmon polaritons based transmission line

Abstract

In this paper, a new spoof surface plasmon polaritons (SPPs) based transmission line (TL) with semi-open structure is proposed, which is implemented on a single-layer substrate with metallized via holes planted on a ground plane. The electromagnetic (EM) power propagates along it in the form of controlled slow surface wave, which is the same with its existing counterparts. The proposed TL can adjust the degree of EM energy confinement, and thus balance its performance in every characteristic, in particular attenuation and interference. As the TL is semi-open (i.e., EM energy distributes in the half space above the ground plane), it is less vulnerable to the nearby interference compared with its former counterparts, which are fully-open structure (i.e., EM energy distributes in the full space). Prototypes working at Ka band are fabricated and measured. Bianco-Parodi (BP) method is used to derive the attenuation of the proposed TL from the measured S-parameters. The proposed structure can be easily scaled for THz applications, which opens the door for future high performance THz components and systems.

A Novel Three-Dimensional Integrated Spoof Surface Plasmon Polaritons Transmission Line

“…The SSPPs unit cell, composed of a metal element and a metallized via hole proposed by [38], is shown in Fig. 1(a), which is planted on a ground plane.…”

“…In contrast, the 3D TL that can be integrated on the PCB has a wider range of applications. An integrated 3D TL is proposed recently, which is implemented on a single-layer substrate with metallized via holes planted on a ground plane and excited by substrate integrated waveguide (SIW) working at Ka band [38]. This TL has profound implications in the microwave frequency, its structure is semi-open and the anti-interference ability is similar to the microstrip line.…”

“…However, the feeding method and performance of this TL are poor, which limits the practical application. In [38], ohmic loss, dielectric loss and radiation loss of this TL are not studied respectively. Although the total losses has been studied, it is still not accurate due to the radiation loss varies nonlinearly with the length of SSPPs TL [39].…”

“…It is more reasonable to study the ohmic loss, dielectric loss and radiation loss for these SSPPs structure separately. This paper, based on [38], proposes a new SSPPs 3D TL, which can also be integrated with microwave circuits and has more advantageous ways of adjusting the dispersion characteristics and more flexible TL configurations. The possibility of applying SSPPs TLs to microwave integrated circuits has been greatly increased.…”

“…The possibility of applying SSPPs TLs to microwave integrated circuits has been greatly increased. A simple high-efficiency 2D conversion structure is utilized to convert the CPW guided waves to the proposed TL, which has a more compact structure and better performance than [38].…”