document title / titre du document TRP W ORK PLAN ... - emits - ESA

TRP Work Plan 2005-2007
Description of Activities
TEC-SB/7935/dc
12/Feb/09
TRP Reference:
Title:
EEE-006
Novel Techniques For General Antenna Characterisation In The Time Domain
Beside frequency domain measurements allowing characterizing the device under test in its operational frequency domain,
time domain measurements techniques are well known to provide additional information on the mismatches seen by a signal
propagating in a guided circuit. The time domain performances dealing with large frequency bandwidth, this technique
provides more qualitative measurements well suited for a diagnostic purpose.
This activity deals with time domain measurement techniques to perform fast antenna radiation diagnostic. Time domain
allows having in one acquisition a full signature of the antenna behavior which can be compared at different stages of
environmental test sequence to identify potential hardware damage. This technique is particularly well suited as time gating
allow rejecting parasitic reflections of the radiated signal and make possible measurements in reverberant situation (just
before or after a Thermal vacuum test or a vibration test as compared to an ideal situation in an anechoic chamber). Reducing
test time and making possible in-situ measurements is of particular relevance for all kind of antennas used for Earth
Observation, telecommunication and science. The interest is reinforced when multiple beams are required.
The activity will address theoretical aspects together with implementation constraints to end-up with a demonstration phase to
be performed on an existing antenna.
Deliverables:
Technical note on time domain interest for radiative measurements.
Test procedure
Test report.
Evaluation report on time domain for radiative measurements
Current TRL: TRL2 Target TRL: TRL3 Application Need/Date: SW operational by 2008
Application/Mission: All missions with complex antennas Contract Duration: 18 months
SW Clause : - Dossier0 Ref.: T-52
Consistency with Harmonisation
Roadmap and Conclusions:
TRP Reference: EEE-008
Title:
Spacecraft EMI control in the presence of composite materials
Traditionally spacecraft construction has relied on metal or metal honeycomb structures that provide good shielding behaviour.
The future use of composite materials will not have such performance from an Electro-Magnetic Compatibility (EMC) point of
view and the consequences on the EMC performance of the system will have to be carefully evaluated in light of the actual
performance of the composite material. The objective of this activity is to provide a characterisation of the shielding
performance and the transfer impedance of target materials, develop measurement techniques, and develop necessary
analytical tools for EMC performance evaluation.
Deliverables:
Technical note (characterisation of shielding performance and transfer impedance of target materials; development of
measurement techniques). Analytical tools for EMC performance evaluation.
Current TRL: TRL1 Target TRL: TRL2-3 Application Need/Date: SW operational by 2008
Application/Mission: All missions with complex antennas Contract Duration: 18 months
SW Clause : - Dossier0 Ref.: T-53
Consistency with Harmonisation
Roadmap and Conclusions:
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