Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
  • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
  • H01Q11/08—Helical antennas
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q1/00—Details of, or arrangements associated with, antennas
  • H01Q1/12—Supports; Mounting means
  • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
  • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
  • H01Q1/2241—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in or for vehicle tyres

Definitions

• the invention relates to a transmitting and / or receiving device for incorporation into elastic structures, preferably polymeric structures, in particular transponder for installation in an elastomeric matrix of an air spring bellows, wherein the transmitting and receiving device consists of one or more electronic circuits or elements, wherein the transmitting and / or receiving device one or more connected to the electronic circuit, embedded in an elastomeric matrix of the bellows antennas and the antenna of one or more elastic and / or plastic
• deformable filaments is made on a predetermined antenna length
• the transmitting and / or receiving device transmits and / or receives radio waves in the UHF range, and an air spring with an air spring bellows, which has such a transmitting and / or receiving device.
• Such transmitting and / or receiving units are known per se and, for example, in the pneumatic vehicle tire in use.
• DE 101 54 494 A1 or EP 1 547 825 B1 discloses such devices.
• EP 1 547 825 B1 it is shown that the elastically conductive filaments are in relatively high density, i. with large number of turns per cm antenna length wound around the or the Sufilêt around.
• the invention has for its object to improve the range of the radio signals of the above-described device without increasing the transmission power.
• This object is achieved in that the antenna has a length between 40 and 100 mm with a winding density of 5 to 15 turns per cm antenna length.
• the invention is further based on the object, an air spring with a
• the air bag has an embedded transmitting and / or receiving unit with optimized range of the radio waves of the transmitting and / or receiving unit.
• the transmitting and / or receiving unit embedded in the elastomeric matrix of the bellows has an antenna having a length between 40 and 100 mm with a winding density of 5 to 15 turns per cm antenna length.
• the antenna has a length of 55 mm with a winding density of 13.4 turns per cm antenna length.
• This antenna has a relative maximum emission power of 13.4 turns per cm and an antenna length of 55mm.
• This short length has the advantage that the antenna can be embedded relatively easily in an elastomer matrix, without the elastomeric structure being appreciably disturbed.
• Radio waves in the UHF range ie at a frequency of 868 MHz have a
• Antennas for this frequency range usually have lengths of Vi Lambda or Vi Lambda, where Lambda is the wavelength.
• changes in the radiation behavior of the antennas with the change in length of the antenna are to be expected.
• the antenna has a length of 70 mm with a winding density of 6.7 turns per cm antenna length.
• the turns of the electrically conductive filament are twisted twice in response.
• the electrically conductive filaments are wound around at least one carrier filament. This arrangement has the advantage that the antenna has a higher stability before and during the production of the elastomeric matrix.
• Fig. 1 is a schematic representation of an antenna according to the invention.
• FIG. 1 shows an antenna 1 of a transmitting and / or transmitting device (not shown)
• An electrically conductive filament 2 is spirally to an elastic carrier thread 3 wound.
• the antenna 1 is embedded in a rubber matrix, not shown, of an air spring bellows, also not shown.
• the antenna 1 has an antenna length "L", which is characterized in FIG. 1 by means of a dimension line 4 and extension lines 5.
• FIG. 2 by means of a diagram, the radiation and thus the range of the antenna signal proportional to the radiation as a function of the winding density Dw and the antenna length L are shown.
• Antenna signals are almost quadrupled from the antenna described above to about 830mm.
• the absolute length of the electrically conductive filament is smaller compared to the antenna according to curve 6. This results from the calculation of the absolute number of Turns that are directly proportional to the stretched length of the electrically conductive filament.
• the length of the electrically conductive filament at curve 8 by a factor of 0.64 is smaller than in curve 6, surprisingly, the range of the radiated signal of the antenna according to curve 8 is significantly increased by the factor ⁇ 3.6. This makes it possible to significantly improve the radiation power of the transmitting and / or receiving device without additional energy input.

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• Details Of Aerials (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=44630125

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• 2010
  • 2010-09-21 DE DE201010037686 patent/DE102010037686A1/de not_active Withdrawn
• 2011
  • 2011-08-15 EP EP11743240.1A patent/EP2619846A1/de not_active Withdrawn
  • 2011-08-15 WO PCT/EP2011/064012 patent/WO2012038156A1/de active Application Filing
  • 2011-08-15 CN CN201180044203.5A patent/CN103119783B/zh active Active
• 2013
  • 2013-03-21 US US13/848,604 patent/US9105982B2/en active Active

Non-Patent Citations (1)

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