Río Bocio, Carlos del
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Río Bocio
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Carlos del
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Ingeniería Eléctrica, Electrónica y de Comunicación
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ISC. Institute of Smart Cities
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Publication Open Access Studying the noise performance of CORPS beam forming networks(IEEE, 2022-05-11) Biurrun Quel, Carlos; Río Bocio, Carlos del; Institute of Smart Cities - ISCThe classical noise wave theory is employed in the field of Coherently Radiating Periodic Structures (CORPS). The coherent properties of these type of networks allow the distribution of a signal across the network and the in-phase recombination of each distributed component at an output port. Whereas these distribution and recombination processes are coherent for the signal and hence do not incur in power loss, the intrinsically incoherent noise contributions incident at the port terminations are not sum coherently. This is especially significant in presence of incident noise powers much larger than the intrinsically generated thermal noise. As a result, an enhancement in terms of Signal-to-Noise Ratio (SNR) is demonstrated analytically by means of noise wave theory. The maximum achievable SNR enhancement depends on the internal structure of the CORPS network. Validation of the proposed theory is provided by means of a commercial circuital software.Publication Open Access Design and characterization of terahertz CORPS beam forming networks(Springer, 2023) Biurrun Quel, Carlos; Haddad, Thomas; Sievert, Benedikt; Kress, Robin; Weimann, Nils; Erni, Daniel; Rennings, Andreas; Stöhr, Andreas; Teniente Vallinas, Jorge; Río Bocio, Carlos del; Ingeniería Eléctrica, Electrónica y de Comunicación; Institute of Smart Cities - ISC; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren; Universidad Pública de Navarra / Nafarroako Unibertsitate PublikoaThis 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.