A microwave ultra-broadband polarization-independent metamaterial absorber (MA) is demonstrated, composed of a periodic array of metal-dielectric multilayered quadrangular frustum pyramids. These pyramids have resonant absorption modes at multiple frequencies, leading to total absorption over an ultra-wide spectral band. The experimental absorption at normal incidence is above 90% in the 7.8–14.7 GHz range, and remains large for incident angles below 60 degrees. The results agree with numerical simulations. Metamaterials (MMs) enable exotic effects like negative refraction, super-lensing, and cloaking. Their unique properties arise from artificial atoms that tailor electric and magnetic responses. MM absorption is typically narrow, but broadband absorption can be achieved by making units resonate at multiple frequencies. The proposed MA uses multilayered pyramids with copper and FR4, achieving ultra-broadband absorption. Numerical simulations and experiments show that the MA has a relative absorption bandwidth (RAB) of 53.1%, with experimental results of 61.6%. The MA is fabricated using a multilayered printed circuit board with copper and FR4 layers. The absorption is measured in a microwave anechoic chamber, showing good agreement with simulations. The MA's ultra-broadband absorption is due to resonant field localization and diffusion across multiple dielectric spacers. The absorption spectrum has 20 peaks with high absorptivity. The RAB increases with larger top widths, but too small widths cause oscillations. Adding more layers reduces oscillations, leading to smooth absorption. The MA is polarization-independent and robust to non-normal incidence. The absorption remains above 80% even at 60 degrees. The design can be extended to other frequencies like terahertz, infrared, and optical. The MA achieves nearly unity absorption from 8–14 GHz over a wide angular range, with tunable bandwidth by adjusting pyramid widths. This design offers a controllable ultra-broadband absorber or thermal emitter.A microwave ultra-broadband polarization-independent metamaterial absorber (MA) is demonstrated, composed of a periodic array of metal-dielectric multilayered quadrangular frustum pyramids. These pyramids have resonant absorption modes at multiple frequencies, leading to total absorption over an ultra-wide spectral band. The experimental absorption at normal incidence is above 90% in the 7.8–14.7 GHz range, and remains large for incident angles below 60 degrees. The results agree with numerical simulations. Metamaterials (MMs) enable exotic effects like negative refraction, super-lensing, and cloaking. Their unique properties arise from artificial atoms that tailor electric and magnetic responses. MM absorption is typically narrow, but broadband absorption can be achieved by making units resonate at multiple frequencies. The proposed MA uses multilayered pyramids with copper and FR4, achieving ultra-broadband absorption. Numerical simulations and experiments show that the MA has a relative absorption bandwidth (RAB) of 53.1%, with experimental results of 61.6%. The MA is fabricated using a multilayered printed circuit board with copper and FR4 layers. The absorption is measured in a microwave anechoic chamber, showing good agreement with simulations. The MA's ultra-broadband absorption is due to resonant field localization and diffusion across multiple dielectric spacers. The absorption spectrum has 20 peaks with high absorptivity. The RAB increases with larger top widths, but too small widths cause oscillations. Adding more layers reduces oscillations, leading to smooth absorption. The MA is polarization-independent and robust to non-normal incidence. The absorption remains above 80% even at 60 degrees. The design can be extended to other frequencies like terahertz, infrared, and optical. The MA achieves nearly unity absorption from 8–14 GHz over a wide angular range, with tunable bandwidth by adjusting pyramid widths. This design offers a controllable ultra-broadband absorber or thermal emitter.