Microwave · INOGYRO joint lab · October 7, 2026
Two INOVEOS papers at European Microwave Week 2026
From October 4 to 9, 2026, INOVEOS took part in European Microwave Week, Europe’s major microwave event, at ExCeL London. On October 7, in the session devoted to non-reciprocal components, Vincent Olivier, R&D engineer at INOVEOS, presented two papers. A third of the five papers in that session also came from our INOGYRO joint laboratory.
A wideband dual-band circulator
Dual-band circulators in the literature use two pairs of resonant modes of the ferrite cavity, at the cost of narrow bandwidths. The new concept presented uses only the first mode pair of a wideband resonator and achieves dual-band operation by optimizing the matching around the two target frequencies.
The microstrip prototype, structured on our LPKF ProtoLaser U4, provides more than 20 dB of isolation over a 17.9% bandwidth around 5 GHz and 12.6% around 7.9 GHz, with losses below 0.4 dB and 0.73 dB. That is more than three times the bandwidth of dual-band circulators published so far, and on par with commercial single-band circulators.
A self-biased SMD circulator in Ku band
Magnet-free thanks to a hexaferrite with high remanent magnetization, this 4.5 × 4.3 × 0.2 mm circulator mounts like a standard SMD by reflow soldering. It operates around 15 GHz with more than 20 dB of isolation and has been power-tested up to 3.4 W. It is the first self-biased Ku-band circulator compatible with SMT mounting.
Two circulators, two approaches, one ambition: to miniaturize non-reciprocal components and extend their performance.
V. Olivier, T. Monédière and L. Huitema, “New Concept of Dual-Band Microstrip Ferrite Circulator Based On Wideband Configuration,” European Microwave Week, London, October 2026. Work by the INOGYRO joint laboratory, co-funded by the French National Research Agency (ANR, BISTRAU project).
V. Olivier et al., “Design and Measurement of a 16 GHz SMD Self-Biased Ferrite Circulator,” European Microwave Week, London, October 2026. Work carried out with Lab-STICC (University of Western Brittany), Thales Land and Air Systems and Thales Research & Technology, with support from the French Defense Innovation Agency.
