Abstract: The present invention relates to an antenna unit (10) for mounting on a mounting surface from a first side of the mounting surface. The antenna unit (10) comprises an element (12) comprising a first side (14) abutting against the mounting surface when the antenna unit (10) is mounted, and a second side (16) arranged parallel to and opposite the first side (14). The antenna unit (10) comprises an antenna mount (18) comprising an attachment member (22) in turn comprising a threaded hole (20) in which a bolt member (24) is applied. The bolt member (24) is manipulated by a tool (26) from the first side of the mounting surface. In a first end position of the attachment member (22), the same is applicable through a hole intended therefor in the mounting surface. In a second end position, when the bolt member (24) has been tightened by the tool (26), the attachment member (22) presses/clamps the antenna unit (10) against the first side of the mounting surface.

Abstract: The present invention relates to an antenna means for transmitting and/or receiving RF-signals in at least a first frequency band. The antenna means comprising a ground plane means (20) arranged to be connected to ground of a circuitry of a radio communication device, a conductive radiating structure (10) having a first end (12) and a second end (14), were said conductive radiating structure (10) being separated from the ground plane means (20). Said first end (12) being connected to ground end said second end (14) being a feed portion.

Abstract: Matching circuit for radio antenna that functions on a two-frequency band which are spaced approximately at a distance of one octave, wherein the upper band is broad. For instance, the first frequency band may be 890-940 MHz and the other band 1710-2200 MHz. The radiator may be a dipole or a monopole over the earth plane, whose bandwidth is sufficient for the first band. The larger bandwidth for the second band is obtained with a transmission circuit that moves and forms the frequency curve stepwise in the Smith chart. When necessary, the matching circuit includes a broadband Balun transformer in addition to said matching circuit.

Abstract: An antenna means for transmitting and/or receiving RF signals, a radio communication system and a method for manufacturing a radiating structure. The antenna means comprises a conductive structure (10) extending between first and second opposite edges (11, 12), and a feed portion. The conductive structure (10) is formed to a radiating structure (1) partially enclosing a volume, and the first and second edges (11, 12) are located at a distance from each other forming a radiating first slit (21), which has a first and a second open end. Hereby an antenna means, which can be made compact, and can operate in more than one frequency band is obtained. A second slit can be arranged to improve the operation in a higher frequency band. The radio communication system comprises transmitting/receiving circuits connected to an such antenna means.

Abstract: The present invention relates to an antenna coupling device (14) for coupling radio frequency signal from a communication device (10) having an internal first antenna, the communication device (10) operable in n frequency bands, where n>1 and n is an integer. The antenna coupling device (14) comprises a port (16) connected/connectable to a transmission line (18). A conducting surface of said antenna coupling device (14) has a geometric shape in the form of a tree structure (20) connected to said port (16).

Abstract: An adapter antenna (2) is used for contactless connection of a mobile telephone (1) to an external antenna (4) in case the telephone lacks a connector for coaxial cable (3) for such a purpose. The most common application is when a mobile telephone is to be used in a vehicle. Transfer of radio waves occurs in the near field of the built-in antenna (6) of the telephone by capacitive coupling. One preferred embodiment especially suited for plane inverted antennae of type L, E or F is described. An optimizing method for two frequency bands is described.

Abstract: The present invention relates to an antenna device comprising a dielectric substrate (11;61) having at least one electrically conductive layer, a feeding (19) and a grounding (18) point. The antenna device is provided with a slot (14;71;81;91) having a closed path between an outer conductive region (12) and an inner (13) conductive region and is further provided with a feed slot (17;41;82;92;104) arranged at a first side of said closed slot (14;71;81;91), extending from said closed slot and outwards. A feeding means (2) is arranged to be connected to said feeding point (19) provided on said outer electrically conductive region (12) on a first side (15;16;73) of said feed slot (17;41;82;92;104), and a grounding means (3) is arranged to be connected to said ground point 18 provided on said outer electrically conductive region (12) on a second side, opposite to said first side, of said feed slot (17;41;82;92;104). The present invention also relates to an antenna assembly (110,120,130).

Abstract: The known antenna connectors for transmitting RF-signals from an outside antenna to a portable telephone includes a connecting cable (8), one end of which is connected to the outside antenna (11) and the second end which is connected with a circuit (4), which capacitively or inductively transmits the RF-signals from the outside antenna to a main antenna of the telephone. In order to improve the coupling performance said circuit consists of a meander formed loop (4) of conductive material, which loop (4) is arranged on a substrate (5) of non conducting material and in one end (6) is connected with the connecting cable (7). The cable has a screen (10) which is connected with a ground element (9), and couples with the ground plane of the telephone, whereat the meander formed loop is placed beside main antenna (11) when transmitting RF-signals.

Abstract: The main object of the present invention is to provide a wide band antenna device integrated in a vehicle (101) for receiving and transmitting RF signals, without transmitting electromagnetic radiation into the compartment of the vehicle. This is achieved by providing a housing (104) being transparent to RF radiation in at least one direction. The housing being arranged inside the compartment (105) of the vehicle. The housing comprising means for suppressing RF radiation in substantially all directions facing substantially inwards the compartment of the motor vehicle seen from a radiating element (201) being arranged in the housing.

Abstract: An antenna device for a radio communication device, comprises a ground plane (1), connected to a conductive second plate (2) by means of a conductive grounding means (9). Between the ground plane (1) and the second plate (2) a conductive third plate (3) is arranged. The third plate (3) is provided with a feed portion (35), which is to be connected to circuitry of the radio communication device, whereby it is achieved that received/transmitted signals in a first frequency band, are capacitively coupled between the second (2) and third (3) plates.