Abstract: An adjustable constant impedance phase shifter is provided. In the adjustable constant impedance phase shifter a conductive circuit path is arranged between a conductive sheet and a parallel plane that is parallel to the conductive sheet; an edge of a dielectric plate and an edge of a conductive plate are adjoined such that the dielectric plate and the conductive plate form a slide member; and the slide member is movably arranged along a slide path between the circuit element and the conductive sheet so that any point of the conducting circuit path is consistently enclosed between the slide member and the parallel plane, and so that the relative permittivity of a medium adjacent to a point on the conductive circuit path is simultaneously changed as the slide member is moved.

Abstract: A broadband antenna of an antenna system comprises a conductive plate comprising four slots. The slots are arranged in a rotation symmetrical manner in the plate. Each slot extends from a circumference of the plate towards a center of the plate. Each slot has an associated feed point located at its associated slot. The feed points associated with a pair of oppositely arranged slots are arranged to be fed with radio frequency signals, such that that a main radiation propagation direction of the antenna is along the rotational symmetry axis of the plate. The antenna design enables the achievement of flexibility in terms of isolation between the two polarisations. The antenna design may further enable a reduced size and weight. The antenna design also enables an antenna unit and an antenna array.

Abstract: The present invention relates to an antenna element comprising a substantially planar conductive disc having at least four slots arranged symmetrically in relation to a central rotational axis perpendicular to the disc, wherein each slot extends from a circumference of said disc radially inwardly toward the central axis and has an associated feed point located at its associated slot, and radially opposite feed points are arranged to be fed with common radio frequency signals which are substantially in phase and with equal amplitude such that the radiation from each slot is in phase and of equal amplitude so that the antenna element radiates along the central axis. Furthermore, the invention also relates to a multiband antenna unit, an antenna array, and a broadband antenna system.

Abstract: Method of manufacturing a transmission line including the steps:—forming an element with at least one longitudinal groove on a surface of the element, the longitudinal groove being defined by two opposite wall portions in the element and having a longitudinal opening adjacent to the surface, and—locating a conductor line in the at least one longitudinal groove. The method is distinguished by the steps:—forming the conductor line from a metal strip upon punching the same from a sheet of metal,—attaching the metal strip to at least one holding device, and—mounting the at least one holding device, with the attached metal strip, on the element, so as to locate the metal strip in the longitudinal groove at a distance from the opposite wall portions of the element. The invention also concerns a transmission line manufactured in accordance with the method.

Abstract: Disclosed herein are exemplary embodiments of interlocking spacers that may be used for suspending transmission lines of a feed network between electrically-conducting ground planes of an antenna assembly. Also disclosed are exemplary embodiments of antenna assemblies including such interlocking spacers. An exemplary embodiment of an antenna assembly generally includes a feed network including one or more transmission lines, a first ground plane, and a second ground plane spaced apart from the first ground plane with a space therebetween. At least one pair of spacers is configured to be interlocked to one another when positioned on opposite sides of a substrate including the transmission lines of the feed network. The spacers are operable for suspending the transmission lines in the space between the ground planes.

Abstract: Various antenna assemblies are disclosed. In one example, an antenna assembly includes a reflector including a first ground plane, a second ground plane below and spaced apart from the reflector, an antenna adjacent a surface of the reflector opposite the second ground plane, and a grounding post galvanically connecting the first ground plane and the second ground plane.

Abstract: Disclosed herein are exemplary embodiments of interlocking spacers that may be used for suspending transmission lines of a feed network between electrically-conducting ground planes of an antenna assembly. Also disclosed are exemplary embodiments of antenna assemblies including such interlocking spacers. An exemplary embodiment of an antenna assembly generally includes a feed network including one or more transmission lines, a first ground plane, and a second ground plane spaced apart from the first ground plane with a space therebetween. At least one pair of spacers is configured to be interlocked to one another when positioned on opposite sides of a substrate including the transmission lines of the feed network. The spacers are operable for suspending the transmission lines in the space between the ground planes.

Abstract: The present invention relates to an antenna arrangement comprising a first and third set of antenna elements, being arranged as a first and third column and aligned along a first and third symmetry axis, respectively, each column comprising elements being operative in a first frequency band (f1) and elements being operative in a second frequency band (f2). The antenna arrangement further comprises a second set of antenna elements, being arranged as a second intermediate column along a second symmetry axis, said second symmetry axis being parallel to said first and third symmetry axes, and being operative in said second frequency band (f2), wherein the ratio of said second center frequency (f2) to said first center frequency (f1) is in the range 1.5 to 3. The distance between said first and third symmetry axes is less than or equal to 0.

Abstract: The invention relates to a transmission line (1) comprising: a groove (2) defined by two parallel conducting walls (3) and a conducting floor (4) all electrically connected to each other, together forming a peripheral conductor of the transmission line, and a center conductor (5), at least partly submersed in the groove (2), the center conductor (5) being isolated from the conducting walls (3) and the conducting floor (4) of the groove (2). The transmission line is distinguished in that the center conductor (5) comprises at least one conductor formed on a side of a printed circuit board (6). The invention also relates to a method for the production of a transmission line.

Abstract: An exemplary antenna array includes at least two or more radiating elements coupled to a ground plane. The two or more radiating elements include a first radiating element separated from a second radiating element by at least one wall that extends away from the ground plane between the first and second radiating elements. The wall may be operable for reducing mutual coupling between the first and second radiating element.

Abstract: Various antenna assemblies are disclosed. In one example, an antenna assembly includes a reflector including a first ground plane, a second ground plane below and spaced apart from the reflector, an antenna adjacent a surface of the reflector opposite the second ground plane, and a grounding post galvanically connecting the first ground plane and the second ground plane.

Abstract: There is disclosed an electromagnetic transmission line arrangement with a phase shifter, comprising at least one conductive branch line (51a,51b) extending from a junction point (51c) to an associated output port, for the propagation of electromagnetic signals in a frequency band along said branch line. The phase shifter includes at least one dielectric body (52,53,54) which is mounted so as to be movable sideways in a transverse direction into a delaying position at least partly covering said branch line (51a,51b). The longitudinal distribution of its dielectric material (?) is adapted to cause, when being moved transversally into said delay position, a controlled phase shift but also to secure, by way of said selected longitudinal distribution of its dielectric material in conjunction with said at least one branch line, an input impedance matching of said transmission line arrangement. The transmission line arrangement can be used in the feeding network to a microwave antenna.

Abstract: A dual polarized antenna element having improved antenna isolation is disclosed by the present invention. The antenna element includes a first feeder for feeding the antenna element in a first polarization direction, and a second feeder for feeding the antenna element in a second polarization direction. According to the present invention, a compensation line is arranged between the first and the second feeders for compensating for an imbalance caused by an essentially capacitive coupling between the first and second feeders. The compensation line is connected to the first and second feeders in close proximity to a radiating part of said antenna element, and has a short electrical length ? and a high impedance relative to an impedance of the first and second feeders, respectively, thereby giving the compensation line an essentially inductive character.

Abstract: The present invention relates to an antenna arrangement comprising a first and third set of antenna elements, being arranged as a first and third column and aligned along a first and third symmetry axis, respectively, each column comprising elements being operative in a first frequency band (f1) and elements being operative in a second frequency band (f2). The antenna arrangement further comprises a second set of antenna elements, being arranged as a second intermediate column along a second symmetry axis, said second symmetry axis being parallel to said first and third symmetry axes, and being operative in said second frequency band (f2), wherein the ratio of said second centre frequency (f2) to said first centre frequency (f1) is in the range 1.5 to 3. The distance between said first and third symmetry axes is less than or equal to 0.

Abstract: The present invention relates to an antenna arrangement connectable to a transceiver for transmitting and receiving RF signals in at least two separate frequency bands. The antenna arrangement has at least two sets of antenna elements arranged on a reflector, and the antenna elements are arranged in an interleaved configuration along a single column. The two separate frequency bands are substantially non-overlapping but relatively close to each other, and the distance between adjacent antenna elements in said column is substantially the same along the column.

Abstract: Method of manufacturing a transmission line including the steps: forming an element with at least one longitudinal groove on a surface of said element, said longitudinal groove being defined by two opposite wall portions in the element and having a longitudinal opening adjacent to said surface, and locating a conductor line in said at least one longitudinal groove. The method is distinguished by the steps: forming the conductor line from a metal strip upon punching the same from a sheet of metal, attaching the metal strip to at least one holding device, and mounting said at least one holding device, with the attached metal strip, on said element, so as to locate said metal strip in said longitudinal groove at a distance from said opposite wall portions of said element. The invention also concerns a transmission line manufactured in accordance with said method.

Abstract: A dual polarized antenna element having improved antenna isolation is disclosed by the present invention. The antenna element includes a first feeder for feeding the antenna element in a first polarization direction, and a second feeder for feeding the antenna element in a second polarization direction. According to the present invention, a compensation line is arranged between the first and the second feeders for compensating for an imbalance caused by an essentially capacitive coupling between the first and second feeders. The compensation line is connected to the first and second feeders in close proximity to a radiating part of said antenna element, and has a short electrical length ? and a high impedance relative to an impedance of the first and second feeders, respectively, thereby giving the compensation line an essentially inductive character.

Abstract: The invention relates to a transmission line (1) comprising: a groove (2) defined by two parallel conducting walls (3) and a conducting floor (4) all electrically connected to each other, together forming a peripheral conductor of the transmission line, and a centre conductor (5), at least partly submersed in the groove (2), the centre conductor (5) being isolated from the conducting walls (3) and the conducting floor (4) of the groove (2). The transmission line is distinguished in that the centre conductor (5) comprises at least one conductor formed on a side of a printed circuit board (6). The invention also relates to a method for the production of a transmission line.

Abstract: There is disclosed an electromagnetic transmission line arrangement with a phase shifter, comprising at least one conductive branch line (51a,51b) extending from a junction point (51c) to an associated output port, for the propagation of electromagnetic signals in a frequency band along said branch line. The phase shifter includes at least one dielectric body (52,53,54) which is mounted so as to be movable sideways in a IC transverse direction into a delaying position at least partly covering said branch line (51a,51b). The longitudinal distribution of its dielectric material (?) is adapted to cause, when being moved transversally into said delay position, a controlled phase shift but also to secure, by way of said selected longitudinal distribution of its dielectric material in conjunction with said at least one branch line, an input impedance matching of said transmission line arrangement. The transmission line arrangement can be used in the feeding network to a microwave antenna.

Abstract: There is disclosed an antenna element, including at least one antenna patch and a feeding arrangement which comprises: a ground plane including: a first aperture slot and a second aperture slot, where said aperture slots cross each other perpendicularly; a feeding plane including: a first antenna port for feeding microwave energy via a first feeding junction into a first pair of feed lines which extend in parallel along said first aperture slot, on each side thereof; a second antenna port for feeding microwave energy via a second feeding junction into a second pair of feed lines which extend in parallel along said second aperture slot, on each side thereof; and where said feed lines cross each other in at least one point, at a mutual distance. Said feeding arrangement is furthermore irregularly configured for compensating for an imbalance caused by said crossing of said feed lines.