Abstract:
The disclosed subject matter concerns an antenna (10) which comprises a ground plane (15) and at least a first and a second antenna element (11, 12). Each antenna element comprises a feed point (16), a cavity (17), a main body (20), a tip (23) and at least a first tapered portion (21) and a second tapered portion (22). Each antenna element (11, 12) is arranged on the ground plane (15), where said first and second tapered portions (21, 22) extend along the antenna element (11, 12) from said tip (23) towards the ground plane (15) of the antenna element (11, 12), and where each antenna element (11, 12) extends essentially perpendicularly to said ground plane (15) along a centre axis (50) of the antenna element. Each antenna element (11, 12) has at least a first leg (31) and a second leg (32), where said first leg (31) extends from said main body (20) to the first feed point (16), where said feed point (16) is located between the first leg (31) and the ground plane (15), and where said second leg (32) extends from said main body (20) to the ground plane (15), and where said second leg (32) is electrically connected to the ground plane (15).
Abstract:
The invention provides an antenna arranged to operate in a frequency band with a bandwidth B and a centre frequency f c . The antenna comprises a slot integrated in a vehicle structure. The slot has a first end and a second end, The antenna also comprises a feeding arrangement with a feed line and a first connection point at a first edge of the slot and a second connection point located at a position substantially across the slot from the first connection point at a second opposite edge of the slot. The slot is arranged to be shorted at the first end and open at the second end. The impedance matching is arranged by locating the feeding arrangement to a position along the slot where antenna impedance matches the impedance of an input/output of a transceiver unit.
Abstract:
The invention provides an antenna structure comprising at least two stacked antenna apertures, a first antenna aperture with first antenna elements and at least a second antenna aperture with second antenna elements. The antenna structure is arranged for operation in at least a high and a low frequency band. The first antenna elements are arranged for operation in the high frequency band and said second antenna elements for operation in the low frequency band. The first antenna elements are arranged to have a polarization substantially perpendicular to the polarization of the second antenna elements. The second antenna elements are arranged in at least one group and each of said group, comprises a number of second antenna elements coupled in series and arranged to have a common feeding point on a straight feeding structure. One feeding structure is located adjacent to each group of second antenna elements. The direction of the feeding structure is substantially perpendicular to the polarization of the first antenna elements. The invention also provides a corresponding method and a radar system comprising the antenna structure.
Abstract:
An antenna system for providing identification functionality comprising a main antenna and an auxiliary antenna, wherein the antennas are configured to at least transmit electromagnetic waves. The antenna system comprises a first channel interface and a second channel interface, a first switch and a transmission input means. The first switch is configured to switch between a first operation mode and a second operation mode. When set in the first operation mode the second channel interface is set to be in connection with the auxiliary antenna and when set in the second operation mode the second channel interface is set to be in connection with the main antenna. If transmission via the first transmission channel is expected the transmission input means is configured to set the first switch in the first operation mode. Thereby the main antenna can be used for transmission of signals both provided via the first and second channel interfaces and when transmission via the first and second channel interfaces simultaneously is required the signal provided via the first channel interface will be transmitted by the main antenna and the signal provided via the second channel interface will be transmitted by the auxiliary antenna.
Abstract:
The present disclosure relates to an antenna system for providing identification functionality comprising an amplifying circuitry, wherein the amplifying circuitry in turn comprises; a splitter node, wherein the splitter node is configured to split a transmission signal in at least a first and a second amplifier signal, a main power amplifier circuit, wherein the main power amplifier circuit comprises a main amplifier and wherein the main amplifier is configured to amplify the first amplifier signal, an auxiliary power amplifier circuit, wherein the auxiliary power amplifier circuit comprises an auxiliary amplifier and wherein the auxiliary amplifier is configured to amplify the second amplifier signal, and a power combiner node, wherein the power combiner node is configured to combine the first and the second amplifier signal of the main power amplifier circuit and the auxiliary power amplifier circuit. The main power amplifier circuit and the auxiliary power amplifier circuit are provided in parallel between the power splitter node and the power combiner node. The present disclosure also relates to an active electrically steerable antenna comprising such an antenna system, methods to control such antenna systems and a computer program, preferably stored on a computer readable medium, configured to be run on a computer or like for controlling the antenna system.
Abstract:
The present disclosure relates to an antenna arrangement (1) comprising a first antenna (2) configured to operate within a first frequency band and a second antenna (3) configured to operate within a second frequency band. The first frequency band is higher than the second frequency band. Further, the second antenna (3) is at least partly arranged within an illumination-field of the first antenna (2). Furthermore, the second antenna (3) comprises a dipole structure (4) segmented into a plurality of electrically conductive sections (5), wherein each electrically conductive section (5) is coupled to an adjacent electrically conductive section by a reactive load section (6).
Abstract:
The present disclosure relates to a notch antenna structure (1) comprising a plurality of notch antenna elements (2) arranged in at least a first row (R). Each notch antenna element (2) comprises a base portion (3) having first and second opposing surfaces (4, 5), a first electrically conductive body (6) and an adjacent second electrically conductive body (7), the electrically conductive bodies (6, 7) extending vertically from the first surface (4), forming an integral structure, a tapering gap (8) between the two electrically conductive bodies (6, 7). The notch antenna structure comprises a bottom plane (9) for receiving the second surface (5) of the plurality of notch antenna elements (2) and the first electrically conductive body (6) comprises a leg portion (10) having a feed arrangement proximate to the tapering gap (8), the feed arrangement comprising a feed point (11).
Abstract:
An antenna array is provided. The antenna array comprises a plurality M of row antenna structures, each row antenna structure forming a row in the antenna array, M being a positive integer ≥ 2, and a plurality N of column antenna structures, each column antenna structure forming a column in the antenna array, N being a positive integer ≥ 2. Each row antenna structure comprises a plurality of row antenna elements, where each row antenna element comprises a main body tapering from a bottom portion to a tip portion. The bottom portion of each row antenna element comprises a first leg portion having a first feed arrangement, and wherein each row antenna element is joined to at least one adjacent row antenna element so to form a conjoined row of notch antennas. Moreover, each row antenna element comprises a first recess extending into the main body from the tip portion towards the bottom portion. Each column antenna structure comprises a plurality of column antenna elements, where each column antenna element comprises a main body tapering from a bottom portion to a tip portion. The bottom portion of each column antenna element comprises a second leg portion having a feed arrangement, and wherein each column antenna element is joined to at least one adjacent column antenna element so to form a conjoined column of notch antennas. Moreover, each column antenna element comprises a second recess extending into the main body from the bottom portion towards the tip portion. Furthermore, each first recess is configured to receive a second recess in order to form the antenna array from said M row antenna structures and said N column antenna structures