The objective of this activity is the definition and development of a universal integrated 4 watt Ku-band transceiver (DRU5), which will be compliant with SatLab specifications. This new product (transceiver) will offer important new functions, which are currently not provided by any competing product or company:
The one box design approach is demanding in terms of tooling and tolerances, but also rewarding as it results in an easy to assemble and compact product, which is easy to handle and install.
A serious effort was needed for the assessment of the tolerance sensitivity of the casted-in waveguide filter resonators. Skyware has extensive experience of handling die-casting tolerances. For example, it has been proven that with good quality die-cast tooling the repeat tolerance of critical dimensions is far less than absolute dimensional tolerance. During the filter design work packages this experience is of great value.
In a normal LNBF, the LNA inputs are connected to a simple and compact OMT-WG transition structure. The inputs of the URANUS LNA however, are connected to two different waveguides which are located at different places in the product. The x-polar input is connected to a TRF WG-filter, while the co-polar input is connected to a relatively large WG-diplexer filter elsewhere in the product. This requires a much bigger PCB which is more difficult to integrate into the concept.
Next to this essential design constraint, the RF screening of this new LNA and mixer deck is much more critical compared to a TVRO single. This requires much more carefully RF screening as many other strong sources of RF energy are present in a very small volume.
It is the purpose of this product is to address new Ku commercial opportunities, The new product design will lead to wider access to interactive satellite services due to improved performance and reduced BoM & manufacturing costs.
Given that most of the commercial opportunities thus far are targeted at business market, the ease of installation of a single unit as well as the size become even more important.
For the first time a DVB-RCS outdoor unit will be able to accommodate broadband applications as well as broadcast applications in the same unit.
The transceiver will be the radio module of a Ku Two Way Satellite System. The transceiver will be designed to be compatible with:
The DRU5 Ku-band transceiver series incorporates the traditional ODU components: transmitter (BUC), a receiver (LNB), and OMT /diplexer into a single mechanical structure. This required the following 3 board designs: RX Board, TX Board, CAPSU Board.
To the right is a high level overview
The design project has now been completed and five mechanical samples have been built and tested. All units are within the specification. The next enhancements to the product will be for higher powers and for a higher stability LNB.
Many technical challenges were overcome during the development of the radio. Some of the key technical achievements of the project are listed below.
There is market requirement for higher power transmitter, with several applications requiring P-1dB of >/= 6W at P-1dB. Work will continue to further develop the 3 way splitter / combiner for combining the output PA MMICs