Biurrun Quel, CarlosHaddad, ThomasSievert, BenediktKress, RobinWeimann, NilsErni, DanielRennings, AndreasStöhr, AndreasTeniente Vallinas, JorgeRío Bocio, Carlos del2023-10-232023-10-232023Biurrun-Quel, C., Haddad, T., Sievert, B., Kress, R., Weimann, N., Erni, D., Rennings, A., Stöhr, A., Teniente, J., Del-Río, C. (2023) Design and characterization of terahertz CORPS beam forming networks. Journal of Infrared, Millimeter, and Terahertz Waves, 44, 430-457. https://doi.org/10.1007/s10762-023-00916-3.1866-689210.1007/s10762-023-00916-3https://academica-e.unavarra.es/handle/2454/46612This work reviews the design and applicability of beam-forming networks based on Coherently Radiating Periodic Structures (CORPS-BFN) at Terahertz (THz) frequency bands. These versatile networks offer two operation modes: a continuous beam steering – feeding an antenna array with a linearly progressive phase distribution – using a reduced number of phase controls; or a multi-beam operation, generating independent, overlapped beams. These networks are built upon the concatenation of power combiners/dividers (PCDs) with isolated outputs. The isolation is provided by monolithically integrated resistors, implemented with Ti/TiO thin films for the first time. In this work, a planar prototype of a (inputs/outputs) microstrip CORPS-BFN for operation in the WR3.4/WM-864 band (220–330 GHz) on a thin 50 m Indium Phosphide (InP) substrate is designed, fabricated, and characterized. The measured S-parameters show a reflection coefficient better than -15 dB and an insertion loss between 1.6 and 3.2 dB in the whole band. In addition, an isolation better than 20 dB between the input ports has been measured. An overall remarkable agreement is observed between the measurements and the simulations. Last, the applications, scalability and efficiency of this type of networks at the targeted band are discussed in detail.application/pdfeng© The Author(s) 2023. This article is licensed under a Creative Commons Attribution 4.0 International License.Beam forming networksCORPSIndium phosphideMonolithic integrationTerahertzThin-filmDesign and characterization of terahertz CORPS beam forming networksinfo:eu-repo/semantics/article2023-10-23info:eu-repo/semantics/openAccess