Miniaturized Lumped-Element LTCC Filter With Spurious Spikes Suppressed Vertically-Interdigital-Capacitors

Author

Bo Zhou ; Weixing Sheng ; Yiyuan Zheng

Author_Institution

Sch. of Electron. & Opt. Eng., Nanjing Univ. of Sci. & Technol., Nanjing, China

Volume

24

Issue

10

fYear

2014

fDate

Oct. 2014

Firstpage

692

Lastpage

694

Abstract

A miniaturized lumped-element 10-layer low temperature co-fired ceramic (LTCC) filter is proposed for the extremely low center-frequency of 60 MHz. The miniaturization is achieved by using spiral inductors with high-impedance lines and spurious spikes suppressed vertically-interdigital-capacitors (SVICs). By interconnecting the open ends of interval fingers with vertical vias, capacitance increment and spurious spikes suppression of vertically-interdigital-capacitor (VIC) are achieved without Q-factor degradation. The proposed filter has the smallest reported size of only 0.004 ×0.004 ×0.0004 λg. Furthermore, comparisons and discussions are also implemented.

Keywords

band-pass filters; capacitors; ceramic packaging; lumped parameter networks; SVIC; capacitance increment; frequency 60 MHz; high-impedance lines; interval fingers; miniaturized lumped-element 10-layer LTCC filter; miniaturized lumped-element low temperature co-fired ceramic filter; spiral inductors; spurious spikes suppressed vertically-interdigital-capacitors; spurious spikes suppression; vertical vias; Band-pass filters; Capacitance; Inductors; Insertion loss; Microwave filters; Resonant frequency; Spirals; Bandpass filter (BPF); low temperature co-fired ceramic (LTCC); lumped element; vertically-interdigital-capacitor (VIC);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2014.2342935

Filename

6869045