Abstract: The invention relates to a radiofrequency (rf) screening assembly for an electrodeless plasma lighting device having a illuminant member (16) which is excited for illumination by means of a radiofrequency (rf), said assembly comprising a screening (shielding) cage (2), which is made of an electrically conductive material or at least has a surface of an electrically conductive material and has a mesh portion (20, 21) for accommodating the illuminant member (16) therein, and a holding means (50, 6) for holding the screening cage (2) at a housing portion (11) of said plasma lighting device. According to the invention a circumferential recess (54) is provided for accommodating an rf-sealing member (9) for sealing against the radiofrequency in order to seal the screening cage (2) against the leaking of the radiofrequency radiation. Furthermore a method for producing such a radiofrequency (rf) screening assembly is disclosed.

Abstract: The invention relates to an electrodeless plasma lighting or illuminating device (microwave lighting device), comprising an illuminant member (2), which is excited by an rf-radiation for illumination and held by a shaft (3), and a supporting member (30) for supporting the shaft (3) together with the illuminant member, wherein the supporting member (30) is coupled with a rotary drive (20) for rotating the supporting member (30) together with the shaft (3) around a longitudinal axis thereof. According to the invention a plurality of supporting spots (37) or point-like supporting members (37) protrude from a surface, preferably an inner surface, of the supporting member (30) for supporting the shaft (3) in a punctual manner. Accordingly the surface contact between the hot shaft (3) and the supporting member is effectively reduced to thereby reduce the efforts required for cooling said shaft, in particular in the region of the supporting member.