Electromagnetic radiation due to the development of telecommunication technology can interfere with electronic devices, so microwave-absorbing materials are a potential solution. This study synthesized and characterized LaxCu(1-x)MnO3 as a microwave absorber in the C-band frequency using a mechanical milling method with variations x = 0, 0.25, 0.50, 0.75, 1.0. Characterization using XRD, SEM, a…