1  
[PERSON]  
1 ACST GmbH, Josef-Bautz Strasse 15, 63457 Hanau, Germany; [EMAIL_ADDRESS] (D.M.-M.);  
[EMAIL_ADDRESS] (O.C.) 1  
[PERSON]  
1 ACST GmbH, Josef-Bautz Strasse 15, 63457 Hanau, Germany; [EMAIL_ADDRESS] (D.M.-M.);  
[EMAIL_ADDRESS] (O.C.) 1  
[PERSON]  
1 ACST GmbH, Josef-Bautz Strasse 15, 63457 Hanau, Germany; [EMAIL_ADDRESS] (D.M.-M.);  
[EMAIL_ADDRESS] (O.C.) 1  
[PERSON]  
1 ACST GmbH, Josef-Bautz Strasse 15, 63457 Hanau, Germany; [EMAIL_ADDRESS] (D.M.-M.);  
[EMAIL_ADDRESS] (O.C.) 1  
[PERSON]  
1 ACST GmbH, Josef-Bautz Strasse 15, 63457 Hanau, Germany; [EMAIL_ADDRESS] (D.M.-M.);  
[EMAIL_ADDRESS] (O.C.) 1  
[PERSON]  
1 ACST GmbH, Josef-Bautz Strasse 15, 63457 Hanau, Germany; [EMAIL_ADDRESS] (D.M.-M.);  
[EMAIL_ADDRESS] (O.C.) 1  
[PERSON]  
1 ACST GmbH, Josef-Bautz Strasse 15, 63457 Hanau, Germany; [EMAIL_ADDRESS] (D.M.-M.);  
[EMAIL_ADDRESS] (O.C.) 1  
[PERSON]  
1 ACST GmbH, Josef-Bautz Strasse 15, 63457 Hanau, Germany; [EMAIL_ADDRESS] (D.M.-M.);  
[EMAIL_ADDRESS] (O.C.) 1  
[PERSON]  
1 ACST GmbH, Josef-Bautz Strasse 15, 63457 Hanau, Germany; [EMAIL_ADDRESS] (D.M.-M.);  
[EMAIL_ADDRESS] (O.C.) 1  
[PERSON]  
1 ACST GmbH, Josef-Bautz Strasse 15, 63457 Hanau, Germany; [EMAIL_ADDRESS] (D.M.-M.);  
[EMAIL_ADDRESS] (O.C. due to the presence of atmospheric windows, which are regions in the electromagnetic spectrum where the Earth's atmosphere exhibits low absorption and attenuation of THz signals [6; 7]. Operating within these atmospheric windows allows wireless systems to use the available spectrum effectively, enabling long-distance communications in this domain. Wireless high-speed communications have already been achieved at 300 GHz employing different receiver architectures. In the works [8; 9], data rates of 10 Gbps and 3.2 Gbps were successfully transmitted over distances of 58 m and 1 m, respectively, utilizing photoconductors. Schottky Barrier Diodes (SBDs) have been widely used in fast communications, and two examples of their use can be found in [10; 11], where the transmission of 59 Gbps over 1.5 m at 328 GHz and 115 Gbps over 110 m at 320 GHz were reported. Furthermore, the studies presented in [12; 13] demonstrate the feasibility of high-data-rate wireless links operating at 300 GHz over distances of a few meters. Specifically, these works report successful data transmissions of 50 Gbps and 260 Gbps, respectively, utilizing sub-harmonic mixers. The improvement of receivers at these frequencies becomes imperative to achieve higher data rates at longer distances. However, harnessing this potential requires overcoming technical challenges associated with THz devices. In this context, mixers play an important role in the reception of THz signals, particularly in heterodyne schemes, where a high radio frequency (RF) signal is mixed with a local oscillator (LO) to generate a lower intermediate frequency (IF) signal [14]. In this specific application, diode-based mixers appear to be an excellent solution to efficiently operate as receivers in this frequency range due to their excellent capabilities in conversion loss (CL) and power consumption [15]. Among the most promising candidates for THz mixers, GaN-based mixers exhibit outstanding power handling capabilities compared to other semiconductor technologies, making them a strong candidate for lower-frequency applications where high input power is not a limitation [16; 17]; however, their suitability for high-speed applications is limited, as they typically exhibit higher conversion loss than, for example, GaAs [18; 19]. In contrast, GaAs-diode-based mixers have been extensively studied and used for high-frequency and high-speed applications [20; 21; 22]. GaAs diodes are well suited for these purposes due to their exceptional electron mobility and high electron saturation velocity [23]. These characteristics enable GaAs mixers to achieve low conversion loss and noise figure (NF) in high-frequency bands [20; 24; 25].