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Weighted average \(Q\)-factor calculation for single port filter-antenna measurement

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Abstract

Filter-antenna has many advantages like no need of match network, low insertion loss, ease of design, low cost and light weight. However, practical implementation of filter-antenna requires a precise value of \(Q\)-factor. Filter-antenna is a single device, handling radiating and filtering properties simultaneously, making it difficult to extract \(Q\)-factor for such device. Moreover, filter-antenna has single port and designer is required to calculate \(Q\)-factor from single port. As reported in literature that the available methods for calculation of \(Q\)-factor from single port seem inaccurate. This paper presents a novel \(Q\)-factor calculation method that outperforms existing methods for almost every case of filter-antenna. Experimental results verify the superior performance of proposed method relative existing methods.

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Authors and Affiliations

  1. Center for Advanced Studies in Telecommunication, COMSATS Institute of Information Technology, Islamabad, Pakistan

    Khurram Saleem Alimgeer

  2. Electrical Engineering Department, COMSATS Institute of Information Technology, Islamabad, Pakistan

    Khurram Saleem Alimgeer

  3. COMSATS Institute of Information Technology, Islamabad, Pakistan

    Shahid Ahmed Khan

Authors
  1. Khurram Saleem Alimgeer
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  2. Shahid Ahmed Khan
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Correspondence to Khurram Saleem Alimgeer.

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Alimgeer, K.S., Khan, S.A. Weighted average \(Q\)-factor calculation for single port filter-antenna measurement. J Comput Electron 13, 894–899 (2014). https://doi.org/10.1007/s10825-014-0606-8

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  • DOI: https://doi.org/10.1007/s10825-014-0606-8

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