Passive RF band-pass filters in an LTCC module made by fine-line thick-film pastes

Markku Lahti (Corresponding Author), Vilho Lantto

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

Low-temperature co-fired ceramic (LTCC) materials offer a good possibility to bury passive components and to produce compact electronic circuits. These properties were utilised in this study to realise a passive band-pass RF filter in the LTCC module. The filter consisted of planar inductors, capacitors and microstrip lines. The component values of the filter structure were determined by using the APLAC circuit simulator. Commercial fine-line thick-film Au paste and shrinkage-matched LTCC Ag pastes were used to print narrow conductor lines by gravure-offset-printing on different LTCC sheets. Narrow conductor lines down to 50 μm wide were printed successfully without shrinkage mismatch during firing. A network analyser and different microscopes were used to study, respectively, the electrical and material properties of the patterns and filters. Variations of the printed line widths and of the electrical values of the patterns and filters were about ±10%. The highest centre frequency of the realised filters was about 2 GHz.
Original languageEnglish
Pages (from-to)1997-2000
Number of pages4
JournalJournal of the European Ceramic Society
Volume21
Issue number10-11
DOIs
Publication statusPublished - 2001
MoE publication typeA1 Journal article-refereed

Fingerprint

Ointments
Bandpass filters
Thick films
Offset printing
Temperature
Networks (circuits)
Microstrip lines
Ceramic materials
Linewidth
Materials properties
Electric properties
Microscopes
Capacitors
Simulators

Cite this

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title = "Passive RF band-pass filters in an LTCC module made by fine-line thick-film pastes",
abstract = "Low-temperature co-fired ceramic (LTCC) materials offer a good possibility to bury passive components and to produce compact electronic circuits. These properties were utilised in this study to realise a passive band-pass RF filter in the LTCC module. The filter consisted of planar inductors, capacitors and microstrip lines. The component values of the filter structure were determined by using the APLAC circuit simulator. Commercial fine-line thick-film Au paste and shrinkage-matched LTCC Ag pastes were used to print narrow conductor lines by gravure-offset-printing on different LTCC sheets. Narrow conductor lines down to 50 μm wide were printed successfully without shrinkage mismatch during firing. A network analyser and different microscopes were used to study, respectively, the electrical and material properties of the patterns and filters. Variations of the printed line widths and of the electrical values of the patterns and filters were about ±10{\%}. The highest centre frequency of the realised filters was about 2 GHz.",
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Passive RF band-pass filters in an LTCC module made by fine-line thick-film pastes. / Lahti, Markku (Corresponding Author); Lantto, Vilho.

In: Journal of the European Ceramic Society, Vol. 21, No. 10-11, 2001, p. 1997-2000.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Passive RF band-pass filters in an LTCC module made by fine-line thick-film pastes

AU - Lahti, Markku

AU - Lantto, Vilho

PY - 2001

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N2 - Low-temperature co-fired ceramic (LTCC) materials offer a good possibility to bury passive components and to produce compact electronic circuits. These properties were utilised in this study to realise a passive band-pass RF filter in the LTCC module. The filter consisted of planar inductors, capacitors and microstrip lines. The component values of the filter structure were determined by using the APLAC circuit simulator. Commercial fine-line thick-film Au paste and shrinkage-matched LTCC Ag pastes were used to print narrow conductor lines by gravure-offset-printing on different LTCC sheets. Narrow conductor lines down to 50 μm wide were printed successfully without shrinkage mismatch during firing. A network analyser and different microscopes were used to study, respectively, the electrical and material properties of the patterns and filters. Variations of the printed line widths and of the electrical values of the patterns and filters were about ±10%. The highest centre frequency of the realised filters was about 2 GHz.

AB - Low-temperature co-fired ceramic (LTCC) materials offer a good possibility to bury passive components and to produce compact electronic circuits. These properties were utilised in this study to realise a passive band-pass RF filter in the LTCC module. The filter consisted of planar inductors, capacitors and microstrip lines. The component values of the filter structure were determined by using the APLAC circuit simulator. Commercial fine-line thick-film Au paste and shrinkage-matched LTCC Ag pastes were used to print narrow conductor lines by gravure-offset-printing on different LTCC sheets. Narrow conductor lines down to 50 μm wide were printed successfully without shrinkage mismatch during firing. A network analyser and different microscopes were used to study, respectively, the electrical and material properties of the patterns and filters. Variations of the printed line widths and of the electrical values of the patterns and filters were about ±10%. The highest centre frequency of the realised filters was about 2 GHz.

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DO - 10.1016/S0955-2219(01)00159-5

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