Pérez Escudero, José ManuelQuemada Mayoral, CarlosGonzalo García, RamónEderra Urzainqui, Íñigo2022-01-122022-01-1220212076-341710.3390/app11167238https://academica-e.unavarra.es/handle/2454/41734In this paper the design and experimental validation of a fourth-harmonic mixer based on Schottky diodes working around 300 GHz is presented. The main novelty of this work consists in the integration of an MMIC-based local oscillator, working around 75 GHz, and a mixer in the same metallic block housing. A prototype has been characterized using the Y-Factor method and yields a best measured conversion loss and an equivalent noise temperature of 14 dB and 9600 K, respectively. This performance is comparable to the state-of-the-art for this type of mixer.8 p.application/pdfeng© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.Fourth-harmonic mixerMillimeter wavesSchottky diodesinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess