Opportunity: On-field Reconfigurable Notch Filter

ESA-STAR ref: esa-star publication pending

Invitation to tender: Space for 5G and 6G: On-field reconfigurable notch filter for sub-6GHz interference mitigation 

Publication date: End Q4 2022

Closing date: End Q1 2023


Terrestrial network operators have initiated the mass deployment of 5G cellular base stations in many countries around the world. However, part of the sub-6 GHz 5G spectrum overlaps with the standard and extended C-band, which is used by Very Small Aperture Terminals (VSATs) for Maritime and Fixed Satellite Services. The sub-6GHz 5G carriers can fall very close to the satellite C-Band and are much stronger than signals received from a satellite. These 5G interferers are difficult to predict, as their magnitude, frequency and timing depends on the actual VSAT location and operating conditions. The use of a filter in front of the Low-Noise-Block (LNB) input can protect the satellite carriers within its passband and isolate unwanted carriers located out of the passband. Filter replacement is a major concern for many C-Band VSAT users, as it requires manual feed adjustments in high-risk situations (e.g., ship decks, high-rise buildings). An electronically reconfigurable notch filter would be an optimal solution in the Sub-6GHz interference mitigation toolkit.

As part of the ARTES 4.0 Space for 5G and 6G strategic action, the present Invitation to Tender (ITT) aims to define, specify and develop a C-Band reconfigurable notch filter breadboard, suitable for VSAT applications.


The objective of the activity is to design, manufacture and test a C-Band reconfigurable notch filter breadboard to dynamically reject sub-6GHz interferers. The main tasks for this activity should include:

• a review of reconfigurable notch filter concepts, suitable for C-Band implementation, with an emphasis on filter and tuning concepts offering high quality factor and low complexity

• the selection of at least one baseline concept for the reconfigurable notch filter

• the detailed design of a breadboard based on the selected baseline, and

• a filter breadboard to be manufactured and tested


For this activity, the Agency has defined a maximum budget of 500,000 Euros.


We look for teams with the technical expertise to understand the needs and scenarios of Satcom and Terrestrial Services, to perform simulations of reconfigurable filter concepts and to develop a reconfigurable notch filter breadboard.

For this ITT, companies or organisations residing in the following Member States will be eligible to apply:

Austria, Canada, Denmark, Finland, Germany, Greece, Hungary, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Romania, Spain, Sweden, Switzerland, and the United Kingdom.

Bidding teams are requested to obtain a Letter of Authorisation from the respective national delegations before submitting the Proposal.


Responding to an open competitive Invitation to Tender (ITT) requires the submission of a Proposal. The Proposal will be evaluated according to ESA regulations and procedures.

The consequential evaluation of proposals results in a recommendation for a winning bid. In the event that several proposals of good quality targeting different and/or complementary aspects are submitted, the Agency reserves the right to place parallel contracts for each of the open competitive ITTs in coordination with the relevant national delegations.

Your tender must be submitted in electronic format only via esa-star tendering [see: https://esastar.sso.esa.int/]


The Prime and all subcontractors must register as potential bidders via esa-star, prior to downloading the official tender documents from esa-star and submitting their Proposal. The registration process needs to be started as soon as possible, as it will take time to complete.


European Space Agency reinforces role of Non-Terrestrial Networks as part of global 6G vision

The European Space Agency’s (ESA) Space for 5G/6G Programme Office co-organised the first ETSI Conference, which focused on how Non-Terrestrial Networks (NTNs) will natively integrate with Terrestrial Networks (TN) in…

European Space Agency's Space for 5G/6G team co-winners of the Satellite Technology of the Year Award

The European Space Agency’s (ESA) Space for 5G/6G programme line, part of the Directorate of Connectivity and Secure Communications, contributed to the winning team at the SATELLITE 2024 conference in Washington DC,…

Agenda released for European Space Agency co-organised “Non-Terrestrial Networks,…

The agenda for an ETSI event co-organised with the European Space Agency (ESA)’s Space for 5G/6G programme on integrating Non-Terrestrial Networks (NTN) into 6G systems, has been released and will allow for industry and…

5G/6G Hub’s metaverse to connect industry and academia online and at Mobile World Congress

In an effort to showcase the European Space Agency's (ESA) work in the integration of satellite and terrestrial communications, engineers of the Space for 5G/6G programme line have created a virtual environment based on the GSMA…

European Space Agency’s 5G/6G Hub takes part in real-world demonstration of key t…

A real-world demonstration of a key technology, being developed in partnership with the European Space Agency's (ESA) Space for 5G/6G programme line, has been conducted by advanced networking and laser communications technologies company Aalyria…

European Space Agency-funded continuously connected autonomous shuttle completes two-year trial

A two-year trial for a UK-based autonomous vehicle, which makes use of communications technology developed by the Darwin Innovation Group and co-funded by the European Space Agency (ESA) and the UK Space Agency, has been successful. The milestone…

European Space Agency and GSOA sign agreement to unlock potential in 5G and 6G technology

The European Space Agency (ESA) has signed a Memorandum of Intent (MOI) with the Global Satellite Operators Association (GSOA), which will see the strengthening of the synergy between satellite and terrestrial telecommunications…

ESA signs Memorandum of Intent with SeRANIS to collaborate and experiment with 5G and 6G NTN communicat…

The European Space Agency (ESA) has signed a Memorandum of Intent (MoI) with the Space Research Center at the University of the Bundeswehr Munich (UniBw M).

ESA agreement with GSMA accelerates satcom network integration for mobile industry

The European Space Agency (ESA) has signed a landmark agreement with GSMA, heralding a major step forward in links between the mobile and satellite industries, and the accelerated integration of satellite-terrestrial connectivity.

Non-Terrestrial Networks are the leitmotif at EuCNC & 6G Summit 2023

In a workshop jointly organised by ESA and Eurescom GmbH in June in Gothenburg, Non-Terrestrial Networks – or ‘NTNs’ turned out to be the major talking point – and quite possibly the hottest topic on the table.

Aligning European NTN Convergence and Integration

3GPP has completed Release-17 of the global fifth generation (5G) wireless technology standard, making Non-Terrestrial Networks (NTN) and satellite segments part of the 5G/6G connectivity infrastructure and ecosystem. NTN multi-layer systems and…

SatixFy Prime 1 beamformer chip breaks into new 5G terrestrial market 

SatixFy have agreed the first sale of their Prime 1 beamformer into the terrestrial 5G market, in a significant deal with India-based Astrome. Developed with the support of the UK Space Agency via the European Space Agency’s ARTES Core…