Van Messem, LauraLauraVan MessemMoerman, ArnoArnoMoermanCaytan, OlivierOlivierCaytanLima de Paula, IgorIgorLima de PaulaHoflack, BramBramHoflackStroobandt, BramBramStroobandtLemey, SamSamLemeyRogier, HendrikHendrikRogier2022-08-192022-06-212022-06-212022-07-012022-08-192021/WOS:000802217700094https://imec-publications.be/handle/20.500.12860/39993In this paper, we propose passive millimeterwave (mmWave) components for Butler matrix beamforming networks implemented in grounded-coplanar waveguide (GCPW) technology designed for integration and co-optimization with an antenna array operating in the 28 GHz 5G band. Within the frequency band of interest, covering the [26.5 GHz–29.5 GHz] spectrum, the insertion loss of the designed hybrid coupler and crossover stays well below 0.75 dB, while the amplitude imbalance remains below 0.5 dB and the phase imbalance does not exceed 5°.Proceedings paper10.1109/IMWS-AMP53428.2021.9644020978-1-6654-2819-4WOS:000802217700094BUTLER MATRIXARRAY