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Article
Publication date: 1 January 2014

Comparison of LTCC inductors on different substrate configurations with PCB inductor

Andrea M. Maric, Goran J. Radosavljevic, Walter Smetana and Ljiljana D. Zivanov

This paper presents performance comparison of RF inductors with the same lateral geometry applying different substrate configurations. The purpose of presented research is…

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Abstract

Purpose

This paper presents performance comparison of RF inductors with the same lateral geometry applying different substrate configurations. The purpose of presented research is to demonstrate and verify some advantages of low temperature co-fired ceramic (LTCC) technology in comparison to printed circuit board (PCB) technology based on the performance analysis of presented inductors in lower RF range.

Design/methodology/approach

The presented inductors are meander structures fabricated in LTCC and PCB technology, with same line width and outer dimensions. Performance analysis of all configurations is based on measurement results and numerical simulations. Advantage of LTCC technology is demonstrated by application of substrate pattering in order to maintain and/or improve expected inductor performances.

Findings

As expected, obtained results for the inductor with an air-gap show increase of the quality factor over 30 percent and widening of the operating frequency range by 50 percent when compared with the same LTCC structure without a gap. But what is more important the inductor with air-gap embedded inside LTCC stack maintains efficiency when compared to PCB inductor. This fact offers possibility of integration good quality components inside LTCC stack and reduction of used chip space.

Originality/value

Advantages of LTCC with respect to PCB design are demonstrated by efficiency increase of the proposed inductor configurations by means of design optimization relying on substrate pattering and incensement of the packaging density by embedding inductors. The presented findings are verified through consistency of measurement results and simulated data.

Details

Microelectronics International, vol. 31 no. 1
Type: Research Article
DOI: https://doi.org/10.1108/MI-04-2013-0017
ISSN: 1356-5362

Keywords

  • Ceramics
  • Microelectronics packaging
  • Thick/thin film technology

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Article
Publication date: 4 May 2012

Characterization and modelling of miniature ferrite transformer for high frequency applications

Mirjana S. Damnjanović, Ljiljana D. Živanov, Snezana M. Djurić, Andrea M. Marić, Aleksandar B. Menićanin, Goran J. Radosavljević and Nelu V. Blaž

Significant achievements in ferrite material processing enable developments of many ferrite devices with a wide range of power levels and working frequencies, which make…

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Abstract

Purpose

Significant achievements in ferrite material processing enable developments of many ferrite devices with a wide range of power levels and working frequencies, which make demands for new characterization and modelling methods for ferrite materials and components. The purpose of this paper is to introduce a modelling and measurement procedure, which can be used for the characterization of two‐port ferrite components in high frequency range.

Design/methodology/approach

This paper presents a commercially available ferrite component (transformer) modelling and determination of its electrical parameters using in‐house developed software. The components are measured and characterized using a vector network analyzer E5071B and adaptation test fixture on PCB board. The parameters of electrical equivalent circuit of the ferrite transformer parameters are compared with values extracted out of measured scattering parameters.

Findings

A good agreement between modelled and extracted electrical parameters of the ferrite transformer is found. The modelled inductance curves have the same dependence versus frequency as extracted ones. That confirms the model validity in the wide frequency range.

Originality/value

In‐house developed software based on proposed model provides inclusion of the ferrite material dispersive characteristics, which dominantly determines high‐frequency behaviour of two‐port ferrite components. Developed software enables fast and accurate calculation of the ferrite transformer electrical parameters and its redesign in order to achieve the best performance for required application.

Details

Microelectronics International, vol. 29 no. 2
Type: Research Article
DOI: https://doi.org/10.1108/13565361211237671
ISSN: 1356-5362

Keywords

  • Transformers
  • Ceramics
  • Ferrite
  • Chip on board

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Article
Publication date: 3 August 2010

Parameters affecting the sensitivity of LTCC pressure sensors

Goran J. Radosavljević, Walter Smetana, Andrea M. Marić, Ljiljana D. Živanov, Michael Unger and Günther Stangl

The purpose of this paper is to demonstrate the influence of material properties and fabrication technique on the performance of an embedded pressure sensor. Based on…

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Abstract

Purpose

The purpose of this paper is to demonstrate the influence of material properties and fabrication technique on the performance of an embedded pressure sensor. Based on conducted theoretical analysis a suitable material and technological technique that gave the best behavior of designed sensor was chosen for its fabrication. This is verified on the example of a resonant pressure sensor, designed for operation in the MHz range.

Design/methodology/approach

A sensor module is fabricated using the low temperature co‐fired ceramics (LTCC) technology and sputtering technique for electrodes deposition. The module comprises an inductor connected with a variable capacitor formed by the sensor membranes in a parallel LC circuit. An extensive parallel analysis of sensors performance for sensors with thick film (screen‐printed) and thin film (sputtered) electrodes is demonstrated. Mechanical and electrical parameters (Young's modulus and permittivity) of different tape materials that are considered for sensor fabrication are determined at room temperature.

Findings

Implementation of the sputtering technique for deposition of the thin film electrodes and usage of tapes with higher elasticity significantly contribute to the increase of the sensor performance (improved sensitivity) compared to designs found in available literature. Experimentally attained results are compared with the ones obtained by analytical calculations achieving good agreement of obtained results.

Originality/value

The improvement of sensor sensitivity by means of evaluation of different tape material and electrode thickness reduction is demonstrated for the first time. The presented results of the sensor equivalent model and the sensor‐antenna system are in good compliance with experimental data determined through measurement.

Details

Microelectronics International, vol. 27 no. 3
Type: Research Article
DOI: https://doi.org/10.1108/13565361011061975
ISSN: 1356-5362

Keywords

  • Vibration
  • Sensors
  • Sensitivity analysis
  • Modeling
  • Simulation

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Book part
Publication date: 7 December 2016

Cross Cultural Aspects of International Guidebooks: Asian Tourists in South Central Europe

Miha Koderman and Anton Gosar

This chapter analyzes the recent increase in tourists traveling from Asia to South Central Europe. The work specifically examines the cross cultural communication about…

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Abstract

This chapter analyzes the recent increase in tourists traveling from Asia to South Central Europe. The work specifically examines the cross cultural communication about religious works of art in popular guidebooks. Since tourism represents a widespread global phenomenon, the guidebook descriptions of religious contents should be objective and accessible for all potential users/tourists, regardless of their cultural, historical, religious, and ethnic background. The analyses of the description of four Catholic cathedrals in South Central Europe in 12 well-known guidebooks demonstrates that the in-depth religious explanations in the literature published in English are minimal and arguably inadequate for the growing Asian market.

Details

The World Meets Asian Tourists
Type: Book
DOI: https://doi.org/10.1108/S2042-144320160000007012
ISBN: 978-1-78560-219-1

Keywords

  • Asian tourists
  • Christian art
  • guidebooks
  • cross cultural communication
  • South Central Europe

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