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\begin{document}

\title{Compact Wide Single-/Dual- Band Bandpass Filter with Equal Inductance
Configuration in Thin Film IPD Technology}



\author[1]{ZhiHao Liu}%
\author[1]{Bao-Guang Liu}%
\author[1]{Chong-Hu Cheng}%
\author[1]{Yong Cheng}%
\affil[1]{Nanjing University of Posts and Telecommunications}%


\vspace{-1em}



  
  \date{June 07, 2024}


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\begin{abstract}
In this paper, based on thin film integrated passive device (TF-IPD)
technology, compact ultra-wideband (UWB) bandpass filter (BPF) and
dual-band bandpass filter (DBBPF) with equal inductance configuration
are proposed. The configuration of equal inductance in a circuit
contributes to reducing variables, simplifying the physical structure,
and shortening the debugging time in the TF-IPD design process. Despite
all the inductors being equal in value, wide passband can still be
achieved. The measured results show that the center frequency of UBW BPF
is 11.43 GHz, the 3-dB fractional bandwidth (FBW) is 133\% (3.87
GHz-18.99 GHz). And the 3-dB FBWs of DBBPF centered at 6.5 GHz and 16.2
GHz are 92\% (3.51-9.49 GHz) and 35\% (13.33-18.98 GHz), respectively.
The stopband of UBW BPF and DBBPF can be extended to 47.7 GHz and 44.8
GHz in sizes of 321 um \selectlanguage{ngerman}× 856 um and 235 um × 846 um, respectively
(excluding measuring pads).%
\end{abstract}\selectlanguage{ngerman}%



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