This research presents a mid-infrared ultra-broadband nonreciprocal thermal emitter based on Weyl semimetal (WSM) metamaterials. The emitter operates in the wavelength range of 12–20 μm and achieves a wide angular range from 16° to 88°, demonstrating significant nonreciprocal thermal radiation without the need for an external magnetic field. The design utilizes a multilayered WSM/dielectric structure, leveraging the strong nonreciprocity of WSMs with different Fermi levels and epsilon-near-zero-induced Brewster modes. The results show a wider angular range in the mid-infrared band compared to previous attempts. The robustness of the nonreciprocal radiation is confirmed through wavelength-averaged emissivity across a full azimuth angle range from 0° to 360°. The study discusses possible materials and nanostructures for dielectric layers, showcasing the flexibility and reliability of the design. The emitter has potential applications in enhanced radiative cooling, thermal emitters for medical sensing and infrared heating, and energy conversion. The research also explores the performance of TE polarization, which exhibits negligible nonreciprocity. The study concludes that the proposed emitter provides a robust broadband and wide angular nonreciprocal thermal radiation, with potential applications in various fields such as radiative cooling, medical sensing, infrared heating, energy conversion, and thermal management. The work is supported by various research funding sources.This research presents a mid-infrared ultra-broadband nonreciprocal thermal emitter based on Weyl semimetal (WSM) metamaterials. The emitter operates in the wavelength range of 12–20 μm and achieves a wide angular range from 16° to 88°, demonstrating significant nonreciprocal thermal radiation without the need for an external magnetic field. The design utilizes a multilayered WSM/dielectric structure, leveraging the strong nonreciprocity of WSMs with different Fermi levels and epsilon-near-zero-induced Brewster modes. The results show a wider angular range in the mid-infrared band compared to previous attempts. The robustness of the nonreciprocal radiation is confirmed through wavelength-averaged emissivity across a full azimuth angle range from 0° to 360°. The study discusses possible materials and nanostructures for dielectric layers, showcasing the flexibility and reliability of the design. The emitter has potential applications in enhanced radiative cooling, thermal emitters for medical sensing and infrared heating, and energy conversion. The research also explores the performance of TE polarization, which exhibits negligible nonreciprocity. The study concludes that the proposed emitter provides a robust broadband and wide angular nonreciprocal thermal radiation, with potential applications in various fields such as radiative cooling, medical sensing, infrared heating, energy conversion, and thermal management. The work is supported by various research funding sources.