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RF Radio Links and LMDS Communications - Module Technology, Status and Trends
Broadband Wireless Access (BWA) systems and multi-media services, such as
LMDS (Local Multipoint Distribution System) and MVDS (Microwave Video
Distribution System) and related radio links are the main activities of the Business
Unit “MicroWave Factory“ of EADS Deutschland GmbH (EADS: European
Aeronautic Defence and Space Company). Based on a long term experience of
modern active phased array radars and different sensor applications up to 100 GHz
still a big challenge for high volume production in the MicroWave Factory.
Covering a broad frequency range, focal points are Point-to-Point radios within
20–38–64 GHz and Point-to-Multipoint radios with spectrum allocations at 26, 28,
31, 32 and 42 GHz.
Cost breakdown analysis for different EADS products, like Transmit/Receive (T/R)
and RF radio modules give a clear identification of today´s cost drivers. The main
results and recommendations will be discussed.
Advanced substrate technologies, based on PCB multilayers combined with RF
layers, e.g. teflon materials, and the use of single packaged RF-MMICs with LGA
(Land Grid Array) and MLC (Multi Layer Ceramic) macro modules in BGA (Ball
Grid Array) technology will be compared with traditional module architectures
based on the use of thin film ceramics and Chip&Wire technologies. The experience
of a Micro Wave Unit (MWU) with a MCM-C (Multichip Module, based on ceramics) in LTCC (Low Temperature Cofired Ceramic) technology will be
discussed.
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