Compact Tunable Filtering Power Divider with Constant Absolute Bandwidth

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Li Gao
  • Xiu Yin Zhang
  • Quan Xue

Detail(s)

Original languageEnglish
Article number7163632
Pages (from-to)3505-3513
Journal / PublicationIEEE Transactions on Microwave Theory and Techniques
Volume63
Issue number10
Online published21 Jul 2015
Publication statusPublished - Oct 2015

Abstract

This paper presents a novel frequency-agile filtering power divider with constant absolute bandwidth and high selectivity. The proposed design utilizes four coupled resonators to obtain the two functions of power division and filtering. Synthesis of the filtering power divider is carried out and the design guidelines are given. Varactors are then loaded to the resonators to enable frequency tuning. By using capacitors as well as magnetic and electric coupling to obtain required external quality factors and coupling coefficients, a constant absolute bandwidth is maintained when tuning the frequency. To demonstrate the validity of the proposed design, a circuit was fabricated. Experimental results show that the operating frequency can be changed from 0.62 to 0.85 GHz with the 3-dB absolute bandwidth of 60 ± 2.5 MHz. Moreover, transmission zeros are generated near the passband, resulting in high selectivity for each tuning state. Comparisons between the measured and simulated results are presented and good agreement is observed.

Research Area(s)

  • Bandpass response, constant absolute bandwidth, high selectivity, integration, Tunable power divider

Citation Format(s)

Compact Tunable Filtering Power Divider with Constant Absolute Bandwidth. / Gao, Li; Zhang, Xiu Yin; Xue, Quan.

In: IEEE Transactions on Microwave Theory and Techniques, Vol. 63, No. 10, 7163632, 10.2015, p. 3505-3513.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review