Thomas von Kerssenbrock

LTCC triplexer for WiMax applications

In the present work, a design procedure for multiplexer development has been described. This procedure allows to reduce development time by using of some local optimizations instead of one global. LTCC (low-temperature co-fired ceramic) triplexer for WiMax (IEEE 802.16e) applications, designed in accordance with described procedure, has been presented. The measured results agree well with the simulation.

Novel high-rejection LTCC diplexers for dual-band WLAN applications

This paper presents novel highly-integrated LTCC diplexers for dual-band Wireless-LAN (IEEE 802.11 a/b/g) appli- cations. Two diplexer versions with integrated high-rejection filters have been realized and optimized for the receive and for the transmit mode. The measured results demonstrate excellent performance. The realized reference board demonstrates, that the number of components in a dual-band WLAN front-end design can be reduced by a factor of three, due to this new approach. Index Terms - Diplexers, Filters, Wireless LAN, LTCC.

Novel high-accuracy LTCC-integrated power monitors for 2.4 and 5 GHz Wireless-LAN applications

Miniature LTCC-integrated power monitors for dual-band operation in the 2.4-2.5 GHz and 4.9-5.9 GHz Wireless-LAN bands are presented. The proposed low-cost circuit incorporates a directional coupler and a dual-diode power detector, all integrated in a very small size LTCC circuit. The measured prototypes demonstrate high performance with respect to power detector accuracy, temperature stability and dynamic range.

A Novel Uniplanar Transition Coplanar Waveguide to Rectangular Waveguide

For communication modules a rectangular waveguide interface is often required. A novel transition between a rectangular waveguide and a coplanar waveguide is presented in this paper. The transition is fully uniplanar, making it very interesting for module applications. The benefits are the fairly simple manufacturing process and the reduced effort on the substrate side since no vias are needed. An insertion loss of 1.2 dB is obtained with broadband behavior over the waveguide frequency range.