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A Multi-Band Impedance Matching Strategy Using Lumped Resonant Circuits

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Abstract

This paper presents a concurrent multi-band impedance matching network realized using multi-resonant circuits. The proposed scheme employs an equivalent LC and CL L-match networks alternately at the different frequency bands of interest. The proposed technique simplifies the design process and realizes a matching network that employs n inductors and capacitors for an n-band impedance matching network. The synthesis technique has been demonstrated for designing a dual-band (953 MHz and 2.45 GHz) and triple-band (900 MHz, 1.8 GHz, and 2.45 GHz) matching networks using single- and dual-resonant circuits. The obtained results exhibit a reflection coefficient and insertion loss magnitude > 20 dB and < 1.1 dB, respectively. Design procedures for constructing dual- and multi-resonant circuits are provided for synthesizing a triple- and multi-band impedance matching network, respectively. The effect of circuit non-idealities on performance has been analyzed, and parasitic-aware design techniques to mitigate the non-idealities are discussed and compared in this paper. The proposed scheme can be used for impedance matching at the input of an LNA, output of a power amplifier, or ensuring maximum power transfer in an RF energy harvesting system.

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Funding

The authors would like to thank the Science and Engineering Research Board (SERB), Government of India, for providing research grants (CRG/2020/004611).

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Authors and Affiliations

  1. Electrical and Electronics Engineering, Birla Institute of Technology and Science Pilani, Hyderabad Campus, Hyderabad, Telangana, 500078, India

    Arun Mohan

  2. Electrical Engineering, Indian Institute of Technology Dharwad, Dharwad, Karnataka, 580011, India

    Saroj Mondal

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  1. Arun Mohan
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Correspondence to Arun Mohan.

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Mohan, A., Mondal, S. A Multi-Band Impedance Matching Strategy Using Lumped Resonant Circuits. Circuits Syst Signal Process 42, 1369–1388 (2023). https://doi.org/10.1007/s00034-022-02195-0

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