LTCC Ka-Band Switch Matrix Experiment for On-Orbit Verification

We have developed a compact, high-performance, mechanically robust reconfigurable microwave switch matrix in combination with diode driver, voltage controlled oscillator, and power detector modules for satellite applications using the low temperature co-fired ceramics technology (LTCC).

During an on-orbit mission aboard a German test satellite to be launched in the end of 2010, the correct operation and reliability of the entire switch matrix system will be analyzed. Therefore, additional circuitry is required such as biasing and a digital interface. The system design had to account for power consumption, mass, overall geometrical dimensions, mechanical robustness, and space qualification. All components are mounted onto a polymer substrate attached to a Kovar® carrier board. A double-sided hybrid integration of ICs into the ceramic module enabled the simultaneous achievement of very promising microwave properties and mechanical robustness. Accordingly, the qualification tests revealed no problems. The contribution summarizes our technological approach in terms of both electronic and mechanical performance and describes the layout and the control of the remote experiment to be conducted on-orbit