# US 7,612,720 B2 · Wireless link module comprising two antennas > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,612,720 B2 - Document ID: US7612720B2 - Status: Granted - Kind: B2 - Application number: 11/912,311 - Filed: 2006-04-19 - Published: 2008-07-31 - Granted: 2009-11-03 - Earliest claimed: 2005-04-25 - Assignees: Koninklijke Philips Electronics N.V. - Inventors: Anthony Kerselaers - Web page: https://patentgrep.com/patent/US7612720B2 ## CPC - H01Q 9/40: Element having extended radiating surface - H01Q 5/371: Branching current paths - H01Q 5/40: Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements - H01Q 9/285: {Planar dipole (H01Q9/065 takes precedence; patch antenna H01Q9/0407)} - H01Q 21/30: Combinations of separate antenna units operating in different wavebands and connected to a common feeder system - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract A wireless link module includes a lower band antenna and a higher band antenna. Each of these antennas includes an antenna element with a feeding end and an open end. The respective antenna elements are substantially capacitively coupled. In addition, the respective antenna elements are electrically coupled at the respective feeding ends via an antenna coupling short. ## Claims ### Claim 1 A wireless link module comprising a lower band antenna and a higher band antenna, each of which comprises an antenna element with a feeding end and an open end, the respective antenna elements being substantially capacitively coupled and being electrically coupled at the respective feeding ends via an antenna coupling short, wherein the coupling short is at a distance from the feeding end. ### Claim 2 (depends on 1) The wireless link module as claimed in claim 1, the respective antenna elements being formed by planar conductors that face each other. ### Claim 3 (depends on 2) The wireless link module as claimed in claim 2, the lower band antenna being provided on a main surface of a substrate, the higher band antenna being provided on another main surface of the substrate, the respective main surfaces facing each other. ### Claim 4 (depends on 1) The wireless link module as claimed in claim 1, the lower band antenna and the higher band antenna each comprising a further antenna element with a feeding end and an open end, so that the lower band antenna and the higher band antenna each form a dipole, the respective further antenna elements being substantially capacitively coupled and being electrically coupled at the respective feeding ends via a further antenna coupling short. ### Claim 5 (depends on 1) The wireless link module as claimed in claim 1, the antenna element of the lower band antenna having a triangular shape, the antenna element of the higher band antenna having a rectangular shape. ### Claim 6 (depends on 1) The wireless link module as claimed in claim 1 comprising a wireless link circuit arranged to process signals in a lower frequency band and in a higher frequency band, the antenna element of the lower band antenna constituting a quarter wavelength radiator for a signal in the lower frequency band, the antenna element of the higher frequency band constituting a quarter wavelength radiator for a signal in the higher frequency band. ### Claim 7 (depends on 1) The wireless link module as claimed in claim 1 comprising a wireless link circuit arranged to process signals in a lower frequency band and in a higher frequency band, the antenna element of the lower band antenna being arranged to operate in the lower frequency band and in a higher frequency band. in a lossless fashion, the lower frequency band and the higher frequency band having a substantially harmonic relationship. ### Claim 8 (depends on 1) A data communication apparatus comprising a wireless link module as claimed in claim 1 for establishing a wireless link with another data communication apparatus. ### Claim 9 (depends on 1) An information rendering apparatus comprising an information rendering arrangement and a wireless link module as claimed in claim 1 for establishing a wireless link with an information providing apparatus, the wireless link module being arranged to apply data, which originates from the information providing apparatus, to the information rendering arrangement so as to render that data. ### Claim 10 (depends on 1) A wireless communication system comprising a plurality of wireless communication apparatuses, at least one of which comprises a wireless link module as claimed in claim 1 for establishing a wireless link with another wireless communication apparatus. ### Claim 11 (depends on 1) A portable X-ray detector comprising a wireless link module as claimed in claim 1. ### Claim 12 (depends on 1) The wireless link module of claim 1, wherein the distance between the coupling short and the feeding end is at least ten times less than a distance between coupling short and the open end. ### Claim 13 (depends on 12) The wireless link module of claim 12, wherein the lower band antenna and the higher band antenna are on opposite sides of a substrate.