Publication Date: 27-JUL-18

Program ref.: Technology Developme
Tender Type: C
Tender Status: INTENDED
Price Range: 200-500 KEURO
Budget Ref.: E/0901-01 - Technology Developme
Proc. Prop.: NO
Establishment: ESTEC
Directorate: Directorate of Tech, Eng. & Quality
Department: Electrical Engineering Department
Division: Radio Frequency Systems & Payloads Offic
Responsible: De Gaudenzi, Riccardo
Products: Satellites & Probes / RF / Microwave Communication (Platform and Payloads) / Transmitters / X-band, S-Band, Ka band, ¿ / Near Earth application, Deep space application, ... / Platform vs Payload
Techology Domains: RF Systems, Payloads and Technologies / RF Technologies and Equipment / RF Equipment
Industrial Policy Measure: C1 - Activities in open competition limited to the non-Larg...

A need for high power isolators has been identified for various altimeter and radar potential EO missions (e.g. Wavemill, CoreH2O,..). To protect the Ku-Band TWT a single isolator unit is preferred over bulkier power divided/combined alternatives involving lower power isolators. The isolator will be subjected to peak powers of up to 3.3kW and CW powers of up to 500W. Recent developments basedon existing designs have shown that the power handling is a key issue that requires a radically different approach for the design ofthose power isolators. At Ku-band, where the small physical size of the devices together with a limited selection of suitable ferrite materials, introduce additional problems with linearity, multipaction and thermal dissipation. The new design approach must consider at the same time thermal issues and microwave performances since are inherently connected for the very high power applications where ferrite materials are applied. The activity shall be organised as follows: - analysis of all suitable ferrite materials considering operational frequency, bandwidth, power handling, temperature stability, and low insertion loss. - test of a subset of those materials, - preliminary design of two isolators based on different ferrite materials - preliminary thermal, RF and high power analysis - test of the isolators with validation of the thermal models, - multipactor test - selection of best material and final design, -tests and conclusions Procurement Policy: C(1) = Activity restricted to non-prime contractors (incl. SMEs). For additional information please go to EMITS news "Industrial Policy measures for non-primes, SMEs and RD entities in ESA programmes".

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