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High-quality factor multipath differential fractal inductor for wireless applications

Sunil Kumar Tumma (Department of Electronics and Communications Engineering, National Institute of Technology, Warangal, India)
Bheema Rao Nistala (Department of Electronics and Communications Engineering, National Institute of Technology, Warangal, India)

Circuit World

ISSN: 0305-6120

Article publication date: 31 May 2021

Issue publication date: 16 June 2022

197

Abstract

Purpose

The purpose of this study is to develop a high-quality factor fractal inductor for wireless applications such as satellite, WLAN, Bluetooth, microwave, radar and cellular phone.

Design/methodology/approach

The Hilbert fractal curve is used in the implementation of the proposed inductor. In the proposed inductor, the metal width has split into multiple paths based on the skin depth of the metal. The simulations of the proposed inductor are performed in 180 nm CMOS technology using the Advanced Design System EM simulator.

Findings

The multipath technique reduces the skin effects and proximity effects, which, in turn, decreases the series resistance of the inductor and attains high-quality factor over conventional fractal inductor for the equal on-chip area.

Research limitations/implications

The width of the path has chosen higher than the skin depth of the metal for a required operating frequency. Due to cost constraints, the manufacturing of the proposed fractal inductor is limited to a single layer.

Practical implications

The proposed inductor will be useful for the implementation of critical building blocks of radio frequency integrated circuits and monolithic microwave integrated circuits such as low-noise amplifiers, voltage-controlled oscillators, mixers, filters and power amplifiers.

Originality/value

This paper presents for the first time the use of a multipath technique for the fractal inductors to enhance the quality factor.

Keywords

Citation

Tumma, S.K. and Nistala, B.R. (2022), "High-quality factor multipath differential fractal inductor for wireless applications", Circuit World, Vol. 48 No. 3, pp. 333-340. https://doi.org/10.1108/CW-09-2020-0264

Publisher

:

Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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