A Nanoplasmonic Branchline Coupler for Subwavelength Wireless Networks

Thirupathaiah, K.; Reddy, K. Sivanagi; Reddy, G. Ravi Shankar

doi:10.1109/tnano.2021.3101981

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…Among all these devices, metal-insulatormetal (MIM) guiding structures have the capability to handle the SPP modes and effectively confine the incident light at the interface of the metal-dielectric interface with an appropriate propagation length without bending loss [14]. Several plasmonic structures have been designed using MIM guiding structures, such as bandpass filters [15,16], couplers [17,18], multiplexers [19], and antennas [20]. Generally, most of these structures are fabricated using noble metals (gold and silver) on substrates of the fused dielectric materials.…”

Section: Introductionmentioning

confidence: 99%

Optical Ultra-Wideband Nano-Plasmonic Bandpass Filter Based on Gap-Coupled Square Ring Resonators

Thirupathaiah,

Qasymeh

2023

IEEE Access

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In this work, an ultra-wideband (UWB) optical bandpass filter (BPF) based on nanoplasmonic structure is designed and thoroughly analyzed. The proposed BPF structure encompasses asymmetric metalinsulator-metal (MIM) slot waveguide that incorporates a gap-coupled series and parallel square ring resonators (SRRs). The characteristic parameters of the MIM waveguide structure are analyzed with a full-wave analysis and a conformal mapping technique (CMT) using a CAD simulation software. These include the normalized propagation constant, the propagation length, and the characteristic impedance. The UWB feature of the proposed structure is mainly dictated by the coupling gaps that combine the feed line with the resonators. Increasing the sequential number of the coupled resonators enhances the optical UWB feature of the proposed design. Two structures with three and five resonators are presented to illustrate the UWB characteristics within the 1235.74-1942 nm, and 1340-2200 nm ranges, respectively. In both cases, the return loss is shown to be higher than 10dB. The proposed nanoplasmonic UWB filter in this work has the potential to replace narrow-bandwidth devices involved in multi-band transmission systems and highdensity photonic integrated circuits. The outcomes of this research contribute to the advancement of UWB filter technology for next-generation communication systems and photonics.

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Section: Introductionmentioning

confidence: 99%

Optical Ultra-Wideband Nano-Plasmonic Bandpass Filter Based on Gap-Coupled Square Ring Resonators

Thirupathaiah,

Qasymeh

2023

IEEE Access

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“…In addition, CPW technology offers several advantages in the electrical performance such as having wideband and low‐dispersion characteristic over microstrip 13 . Therefore, CPW technology receives enhanced attraction to develop a low‐cost miniaturized CPW microwave components for the sake of having simple integration to the solid‐state devices 14 . Furthermore, a variety of the mBLC designs have been reported in the literature that have been developed by the folded transmission lines, 15 fractal, 16 lumped elements, 17 slow‐wave structures, 18 open stubs, 19 and asymmetric structures 20 on the printed circuit boards (PCBs).…”

Section: Introductionmentioning

confidence: 99%

“…13 Therefore, CPW technology receives enhanced attraction to develop a low-cost miniaturized CPW microwave components for the sake of having simple integration to the solid-state devices. 14 Furthermore, a variety of the mBLC designs have been reported in the literature that have been developed by the folded transmission lines, 15 fractal, 16 lumped elements, 17 slow-wave structures, 18 open stubs, 19 and asymmetric structures 20 on the printed circuit boards (PCBs). However, a variety of the proposed mBLCs are unsuitable for high frequency and high-power applications.…”

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confidence: 99%

A novel miniaturized X‐band coplanar waveguide branch‐line coupler using T‐ and 𝜋‐type equivalent transmission lines

Arican

Sen

Turhan‐Sayan

2022

Int J RF Mic Comp-Aid Eng

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This article reports a novel compact branch‐line coupler (BLC) in coplanar waveguide technology for X‐band monolithic microwave integrated circuit (MMIC) applications. This article consists of theoretical basis, design, and measurement results of the developed miniaturized BLC. In this study, the theoretical basis of the miniaturized BLCs were analyzed and the T‐ and π‐type equivalent transmission line approaches and meandering technique were utilized to significantly miniaturize the conventional BLC. The proposed BLC was manufactured with gallium nitride MMIC technology. The manufactured BLC has a return loss of better than −12 dB over 8.5–11.1 GHz which yields a 26.8% bandwidth. In addition, the insertion losses |S21| and |S31| were measured as −3.5 dB and −3.6 dB at 9.6 GHz. Moreover, the phase difference between the output ports were 90° ± 5° over the frequency bandwidth of 9.2–11.6 GHz. Furthermore, the proposed BLC has a size of 3.9 mm2 (0.152λ × 0.156λ) and this achieves 62% size reduction with respect to the conventional BLC design. The developed novel miniaturized BLC can be utilized in the X‐band applications.

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