Abstract: There is provided a monopole antenna including a helical radiating element including a first longitudinal portion having a first winding pitch and a second longitudinal portion having a second winding pitch and a cylindrical radiating element generally coaxial with the helical radiating element and extending along at least most of the first longitudinal portion.
Abstract: A handheld scanning subsurface detector (1) includes a detector module (2) and a computing unit (3) located in handheld housing (5), a guide (7) for guiding the detector module (2) at a predetermined distance over a to-be-analyzed wall surface (6), at least one path sensor (8) connected to the computing means (3) and connected, in a controlling manner, to the detector module (2) by controlling means (9). A corresponding control method is also described.
Abstract: A commutator for commutator motors has a glass carrier body (11), and a plurality of electrically conductive segments (16) which are arranged at an outer circumferential surface (15) of the carrier body (11).