Biurrun Quel, Carlos
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Biurrun Quel
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Carlos
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Ingeniería Eléctrica, Electrónica y de Comunicación
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Publication Open Access Evaluating noise in passive beam forming networks for multibeam applications(Elsevier, 2023) Biurrun Quel, Carlos; Río Bocio, Carlos del; Ingeniería Eléctrica, Electrónica y de Comunicación; Institute of Smart Cities - ISC; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio IngeniaritzarenIn this work, we identify that the analysis in terms of noise of multibeam passive beam forming networks requires a proper formulation, in order not to overestimate the noise generated by the network. We show that the inherent spatial diversity offered by this type of networks results in an improvement of the SNR, similar to the one obtained by digital architectures, with a penalty due to the insertion loss. To illustrate this phenomena, two generalized equivalent circuits are proposed are a numerical example is presented.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 Noise in coherently radiating periodic structures beam forming networks(IEEE, 2022) Biurrun Quel, Carlos; Río Bocio, Carlos del; Ingeniería Eléctrica, Electrónica y de Comunicación; Institute of Smart Cities - ISC; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio IngeniaritzarenFollowing the noise wave theory, beam forming networks based on Coherently Radiating Periodic Structures (CORPS-BFN) are analysed and proven to be capable of enhancing the Signal to Noise Ratio of the system by analogically multiplexing the signal and noise contributions present at every input port. The geometry of the network determines the maximum enhancement achievable, which is demonstrated to be independent from insertion losses. These findings are supported by a mathematical approach, as well as with experimental data.