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Antenna Concepts for Ceramic Multilayer Modules
Keywords: LTCC, Antenna, Microwave
LTCC (Low Temperature Cofired Ceramics) dielectrics have a higher permittivity than most of the common organic circuit boards. Together with good RF-performance and nearly arbitrary layer count these are excellent prerequisites for high packaging density. Thermal conductivity is ten times higher than that of organic substrates which is very helpful when semiconductors need to be cooled either because of their power dissipation or their better noise performance at lower operating temperature. The well-established screen-printing process used in LTCC is a further benefit in the volume production of such modules. Over the last decade low loss LTCC material systems have become available which are very suitable for microwave and millimetre wave applications. Integrating the antenna into such microwave front-ends is a consequent step to avoid phase and amplitude uncertainties associated with connectors and cables. Higher permittivity is not always an advantage. It helps to reduce size in some antenna designs but it also limits bandwidth. However, LTCC with its inherent possibilities of complex 3-dimensional structures facilitates entirely new antenna concepts which do more than just make up for this drawback. In this paper a few of these solutions for different frequencies and radiation patterns shall be presented with their principle of operation and measured performance.
Peter Uhlig,
Kamp-Lintfort, NRW D-47475,

  • Amkor
  • ASE
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  • Honeywell
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  • Kyocera America
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  • Micro Systems Technologies
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  • Specialty Coating Systems