Implementation of UWB BPF with modularised design based on SQR and DCR

Jun Ge Liang; Cong Wang; Nam Young Kim

Implementation of UWB BPF with modularised design based on SQR and DCR

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Author(s): Jun Ge Liang¹ ; Cong Wang² ; Nam Young Kim¹
- Affiliations: 1: RFIC Centre , Kwangwoon University , 447-1 Wolgye-Dong, Nowon-ku, Seoul 139-701 , Korea ;
  2: School of Electronics and Information Engineering , Harbin Institute of Technology , Harbin 150001 , People's Republic of China
Source: Volume 12, Issue 7, 13 June 2018, p. 1175 – 1184
DOI: 10.1049/iet-map.2017.0028 , Print ISSN 1751-8725, Online ISSN 1751-8733

Received 18/02/2017, Accepted 18/01/2018, Revised 04/01/2018, Published 22/01/2018

Two ultra-wideband (UWB) bandpass filter (BPF) with fractional bandwidths of 30% (1.2 GHz) and 52% (2.5 GHz) are developed and named as UWB BPFs I and II, respectively. Two novel generation approaches of resonant mode (RM) are first presented and analysed, which are named as synchronous-quasi-resonance (SQR) and double-curved-route (DCR), assisting in generating more RMs with the same prototype. First, an admittance prototype and its equivalent network are proposed to realise an UWB with multi-RMs and transmission zeros (TZs), whose detailed generation mechanisms are discussed. Then, two UWB BPFs are implemented employing the same prototype and design procedures. Their distinct characteristics of frequency response show that the one employing SQR and DCR can generate three more in-band RMs and one more TZ in high rejection band over another, which leads to a 1.3 GHz wider bandwidth and 1.0 GHz more harmonic suppression. Finally, a modularised design model is proposed to build the UWB or multi-band filters requiring arbitrary numbers of RMs and TZs.

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Implementation of UWB BPF with modularised design based on SQR and DCR

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