Compact bilateral single conductor surface wave transmission line

TL;DR

This paper introduces a compact bilateral single conductor surface wave transmission line that efficiently converts modes, reduces size compared to traditional structures, and has potential for integrated surface wave devices.

Contribution

It proposes a novel, smaller surface wave transmission line that converts QTEM mode to TM mode, enabling more compact integrated surface wave circuits.

Findings

The proposed TL halves the size of conventional structures.

Experimental verification confirms the design's effectiveness.

The structure's propagation constant depends on geometric parameters.

Abstract

A compact bilateral single conductor surface wave transmission line (TL) is proposed, converting the quasi-transverse electromagnetic (QTEM) mode of low characteristic impedance slotline into the transverse magnetic (TM) mode of single-conductor TL. The propagation constant of the proposed TL is decided by geometric parameters of the periodic corrugated structure. Compared to conventional transitions between coplanar waveguide (CPW) and single-conductor TLs, such as Goubau line (G-Line) and surface plasmons TL, the proposed structure halves the size and this feature gives important potentials to develop integrated surface wave devices and circuits. The designed structure, sample fabrication and experimental verification are discussed.