Briton Roger Scheuer, inventor of the EmDrive engine, patented a new version of the unit. The operation of the device has not yet been explained in terms of conservation laws. A document describing the device is available on the UK Intellectual Property Office website.
The EmDrive modification patented by Scheuer differs from the previous versions of the unit by the presence of a superconducting plate. According to the scientist, this makes it possible to reduce, relative to an outside observer, the change in the frequency of the electromagnetic wave during its propagation in the engine cavity and thus increase the thrust of the EmDrive.
The EmDrive motor is a device consisting of a magnetron (generating microwaves) and a resonator (storing the energy of their vibrations). Outwardly, the unit resembles a bucket laid on its side. This design allows, according to Scheuer, to convert radiation into thrust.
The thrust developed by EmDrive is of the order of a fraction of a micronewton or millinewton. The emission of photons or other particles from the resonator of the engine during its operation was not recorded, which would explain the possible appearance of thrust and the fulfillment of the law of conservation of momentum.
Conservation laws are a consequence of the symmetry properties of space-time. For example, the law of conservation of momentum is a reflection of the homogeneity of space - the equality of its properties regardless of the point chosen in it, and the law of conservation of energy is the homogeneity of time.