公开(公告)号：US11152683B2

公开(公告)日：2021-10-19

申请号：US16628697

申请日：2018-07-04

Applicant: Kamstrup A/S

Inventor： Leonardo Azzinnari ,  Claus Jørgensen

IPC: H01Q9/04 ,  H01Q1/22 ,  H01Q5/30 ,  H01Q1/48 ,  H01Q1/40

Abstract: A dual band antenna (AN) configured for being position on a surface of a pit lid and capable of wireless signal transmission at two frequency bands in response to an electrical signal applied via a feed wire. A convex conductive surface, e.g. 5 dome-shaped, is placed above a conductive ground plane element, wherein at least a part of an edge, e.g. 20-40% of the edge, of the dome-shaped radiator element is in electrical contact with the conductive ground plane element. Further, the convex conductive surface is connected via the feed wire. This antenna design allows first and second resonance frequencies within a factor of such as 1.8-2.2, 10 which allows the antenna to be designed e.g. for both of the frequency bands 450-470 MHz and 902-928 MHz which are relevant for meter reading data and with smaller dimension than what could be expected from conventional antennas. A housing with a convex top surface forms an enclosure around the antenna parts conductive ground plane element and the dome-shaped radiator element, the 15 housing has a bottom surface arranged to face the surface of the pit lid, and where the feed wire exits the housing.

公开(公告)号：US20200185833A1

公开(公告)日：2020-06-11

申请号：US16628697

申请日：2018-07-04

Applicant: Kamstrup A/S

Inventor： Leonardo Azzinnari ,  Claus Jørgensen

IPC: H01Q9/04 ,  H01Q5/30 ,  H01Q1/48

Abstract: A dual band antenna (AN) configured for being position on a surface of a pit lid and capable of wireless signal transmission at two frequency bands in response to an electrical signal applied via a feed wire. A convex conductive surface, e.g. 5 dome-shaped, is placed above a conductive ground plane element, wherein at least a part of an edge, e.g. 20-40% of the edge, of the dome-shaped radiator element is in electrical contact with the conductive ground plane element. Further, the convex conductive surface is connected via the feed wire. This antenna design allows first and second resonance frequencies within a factor of such as 1.8-2.2, 10 which allows the antenna to be designed e.g. for both of the frequency bands 450-470 MHz and 902-928 MHz which are relevant for meter reading data and with smaller dimension than what could be expected from conventional antennas. A housing with a convex top surface forms an enclosure around the antenna parts conductive ground plane element and the dome-shaped radiator element, the 15 housing has a bottom surface arranged to face the surface of the pit lid, and where the feed wire exits the housing.

公开(公告)号：US20240213653A1

公开(公告)日：2024-06-27

申请号：US18544691

申请日：2023-12-19

Applicant: Kamstrup A/S

Inventor： Leonardo Azzinnari ,  Bo Rosenberg Pedersen ,  Klaus Lund Nielsen

IPC: H01Q1/22 ,  G01D4/00 ,  H01Q1/50

CPC classification number: H01Q1/22 ,  G01D4/002 ,  H01Q1/50

Abstract: The present disclosure refers to a transmission coupler for receiving radio signals carrying consumption data from a utility meter. The utility meter comprises a meter housing wherein a radio frequency transmitter circuit and a meter antenna is arranged. The transmission coupler comprises a coupling antenna, a transmission line or a radio frequency connector for connection of a transmission line and a mechanical connection element. The mechanical connection element is arranged for mechanically connection of the transmission coupler to an outer surface of the meter housing whereby a near field coupling is provided between the meter antenna and the coupling antenna through the meter housing. The transmission line or radio frequency connector is electrically connected to the coupling antenna. The transmission coupler further comprises a displacement element arranged to occupy a volume in the proximity of the coupling antenna, whereby a volume of a medium surrounding the transmission coupler is displaced away from the coupling antenna by the displacement element, such that the influence on the near field coupling by the medium surrounding the coupling antenna is reduced.