High-frequency technology for 6G, radar and satellite communication

Ceramic substrate materials such as (U)LTCC ((Ultra) Low Temperature Co-fired Ceramics) offer decisive advantages for high-frequency applications – particularly in the field of 6G mobile communications, millimeter wave radar and satellite communications:

  • Low dielectric losses: high signal quality even at frequencies >100 GHz
  • Thermal stability: low expansion, high reliability under extreme temperature variations
  • Efficient heat conduction: ideal for compact, high-performance assemblies
  • Miniaturization through multilayer technology: compact, highly integrated RF modules for limited installation space, precise 3D structures for beamforming and phased arrays

These properties are particularly relevant for satellite communication, where components have to withstand extreme conditions such as vacuum, radiation, temperature variations and mechanical stress. Ceramic RF components enable reliable, low-loss signal transmission for both satellite-to-earth and satellite-to-satellite links, e.g. in the K-, Q/V- or D-/H-band.

Fraunhofer IKTS has comprehensive tools for the layout and design of multilayer ceramic components as well as a complete technology line for their production. We also have extensive expertise in functional characterization and reliability testing to ensure the performance of ceramic components under demanding conditions.

Cantilevered LTCC antenna structure with 10 parallel Vivaldi antennas in a stepped substrate.
© Fraunhofer IKTS
Cantilevered LTCC antenna structure with 10 parallel Vivaldi antennas in a stepped substrate.
Broadband 140 GHz Vivaldi antenna with 50 µm thin LTCC membrane.
© Fraunhofer IKTS
Broadband 140 GHz Vivaldi antenna with 50 µm thin LTCC membrane.
X-ray image of an LTCC package with integrated 140 GHz chip (MMIC).
© Fraunhofer IKTS
X-ray image of an LTCC package with integrated 140 GHz chip (MMIC).
LTCC-based transmit array antenna with 30 dBi.
© Fraunhofer IKTS
LTCC-based transmit array antenna with 30 dBi.
GRIN lens for 60 GHz waveguide antenna with open end in LTCC multilayer design.
© Fraunhofer IKTS
GRIN lens for 60 GHz waveguide antenna with open end in LTCC multilayer design.
100 µm apertures in stamped LTCC green tape for the LTCC GRIN lens.
© Fraunhofer IKTS
100 µm apertures in stamped LTCC green tape for the LTCC GRIN lens.

Highlights

  • LTCC radio frequency circuits and antennas up to 300 GHz
  • LTCC antenna housings for millimeter wave systems (MMIC, Monolithic Microwave Integrated Circuit)
  • ULTCC high-frequency components (K-band filter elements, transmit arrays, metasurfaces)
  • LTCC GRIN lenses