Investigation of the Transitions for Coplanar Waveguide to Terahertz Spoof Surface Plasmon Polariton Waveguides
| Autor: | Gulay Ozsahin, Tuna Abacilar, Mehmet Unlu, Muhammed Abdullah Unutmaz |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | IEEE Transactions on Antennas and Propagation. 70:3002-3010 |
| ISSN: | 1558-2221 0018-926X |
| DOI: | 10.1109/tap.2021.3126369 |
| Popis: | In this paper, we present the investigation and design of high-performance transitions from coplanar waveguide (CPW) to the single-conductor, corrugated waveguides, namely terahertz spoof Surface Plasmon Polariton Waveguides (SSPP WGs). In contrast with the previous studies in the literature on the CPW to SSPP WG transitions, we propose a novel methodology to examine the relationship between the guided wavenumber and momentum matching, which is based on analytical calculations, together with the effects of the flaring grounds on the transition performance. This novel methodology allows us to design a low-loss transition circuit for any given CPW and SSPP dimensions, which is demonstrated for the first time in the literature. We verify the proposed methodology by the design, fabrication, and measurement of several transition circuits. The measurement results show that the insertion losses of the proposed transition circuits can be as low as -1.2, -1, and -2.4 dB at 0.25, 0.275, and 0.3 THz, respectively, which brings a significant improvement of 0.6 to 2.3 dB in 0.25-0.3 THz band, compared to the previously reported studies in the literature for the terahertz band. |
| Databáze: | OpenAIRE |
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