Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q21/00—Antenna arrays or systems
  • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
• • 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
  • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
  • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
  • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q1/00—Details of, or arrangements associated with, antennas
  • H01Q1/40—Radiating elements coated with or embedded in protective material
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q1/00—Details of, or arrangements associated with, antennas
  • H01Q1/40—Radiating elements coated with or embedded in protective material
  • H01Q1/405—Radome integrated radiating elements
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
  • H01Q5/30—Arrangements for providing operation on different wavebands
  • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
  • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
  • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
  • H01Q5/364—Creating multiple current paths
  • H01Q5/371—Branching current paths
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
  • H01Q9/04—Resonant antennas
  • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
  • H01Q9/04—Resonant antennas
  • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
  • H01Q9/32—Vertical arrangement of element
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
  • H01Q9/04—Resonant antennas
  • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
  • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

• the present invention relates to a contact device according to the preamble of claim 1.
• the invention also relates to an antenna device for transmitting and/or receiving RF signals m one or a plurality of frequency bands and to a hand held radio communication device.
• Antenna means for transmitting and receiving RF-signals in a single frequency band have been well known for a long time.
• Antenna devices for transmitting and receiving RF-signals m a first and a second frequency band i.e. dual band antennas, have also been known for a while.
• a drawback with the dual band antennas, in order to be efficient, is that they demand generally a quite large amount of space which make them unpractical .
• the pending international application WO 99/50927 discloses a multi band antenna.
• Said ulti band antenna comprising a meander shaped conducting area arranged on a thin flexible dielectric carrier. Said antenna is wrapped around a base and connected to a feed member via a contact device.
• EP 0855759 by LK-Products Oy, a simple dual -frequency antenna is disclosed. The purpose of the disclosed antenna element is to use it within several frequency ranges. This is achieved by connecting a feed line to a point between a first end and a second end of the antenna element m an asymmetric fashion. It also discloses an embodiment where the antenna element is a combination antenna having a first part being helix shaped and a second part being whip shaped. The feed line is integrated with the whip by folding.
• the volume available for the antenna is small, and often there is a desire to make it even smaller.
• the antenna is desired to operate m multiple bands and/or m wide bands.
• an antenna device including a contact device as defined m the characterising portion of claim 11 and by a hand held radio communication device including an antenna device as defined m the characterising portion of claim 21.
• a contact device is obtained that more efficiently may use the available volume of an antenna device having the features of claim 11. This results m that the antenna device can be made to operate m further or wider frequency bands or that a larger antenna surface can be designed to radiating element (s) operating m one or more frequency bands. An effective use of the available outer surface and volume can thus be achieved.
• One advantage with the contact device according to present invention is that it has a very simple construction and therefore is very inexpensive to manufacture.
• Another advantage with the contact device according to the present invention is very simple to integrate m an antenna device .
• Figure 1 shows m a front view an embodiment of a contact device according to the invention.
• Figure 2 shows the contact device of figure 1 m a sectional side view.
• Figure 3 shows the contact device of figure 1 m a perspective view.
• Figure 4 shows an antenna device m a sectional view according to an embodiment of the invention.
• the antenna system of the invention is operable to receive and/or transmit radio signals. Even if a term is used herein that suggests one specific signal direction it is to be appreciated that such a situation can cover that signal direction and/or its reverse.
• Figure 1 shows m a front view an embodiment of a contact device 100 according to the invention.
• the contact device 100 is m this particular embodiment made of a band shaped material .
• Said contact device has been divided into different parts for sake of clarity only.
• the contact device 100 comprising, starting from below m figure 1, a first contact part 104 followed by an elongated part 103 continuing m a second contact part 102 and ending m a radiating element with an open end 101.
• Said first contact part 104 comprising a boss-like protrusion 105.
• Said radiating element with an open end 101 being m this embodiment meander shaped.
• said first contact part 104 is mainly convex shaped and said second contact part 102 is mainly U shaped.
• said radiating element with an open 101 end and said elongated part 103 are mainly m a same plane and they are mainly planar.
• the material m said contact device is preferably some material w th good radiating characteristics and at the same time being somewhat resilient.
• an embodiment of an antenna device 4C0 is shown.
• the antenna device is arranged for transmission/reception of RF waves m at least a first frequency band, e.g. m the 900 MHz band and a second frequency band, e.g. m the 1800-1900 MHz band and optionally m a further third frequency band, e.g. m a higher frequency band for instance m the 2-3GHz range.
• the antenna device comprises said contact device 100, a support plug 401, a base 402 and a radiating element 403.
• the support plug is made of a dielectric material .
• the contact device 100 comprises, as mentioned above, a first contact part (104), an elongated part (103), a second contact part (102) and a further radiating element with an open end (101) .
• the radiating element 403 is m the form of a meander shaped conductive area on a thin dielectric carrier which is applied to the base 402 m an conventional way well known m the prior art, such as for example with an adhesive.
• a first inlet m radial direction is denoted 410.
• a part 405 of the radiating element 403 is folded inwards downwards into the cavity of the base 402 through the inlet 410 thereby forming a contact area of the radiating element 403.
• Said support plug 401 having dimensions adapted to the cavity m said base 402.
• Said support plug 401 being provided with an indentation for said radiating element 101 arranged on said contact device 100.
• Said support plug being further adapted to press said contact device 100 at its U shaped second contact part 102 to said part 405 being the contact area of said radiating element 403,
• the contact device 100 and the support plug 401 are introduced into the cavity of the base 402 through a second inlet at the top of the base 402 and above said first inlet 410.
• the contact device 100 and thereby the support plug 401 is fixed m place through forced fit m said cavity of the base 402 and the contact part 102 is forced fit to said contact area 405 of the radiating element 403.
• the contact device 100 connects to the folded part 405 of the radiating element 403, and through the boss-like protrusion 105 arranged at the first contact part 104 to a feed member arranged on for example a printed circuit board (not shown m the figure) . Thereby enables an electric circuit between the radiating element 403, the radiating element 101 and the printed circuit board.
• the antenna is fed through the boss-like protrusion 105.
• the antenna device 400 is to be connected to a hand held radio communication device (not shown) by means of, m this embodiment, snap-clicking the antenna means m place on said hand held radio communication device.
• a cap is usually also present to protect the radiating element, but the cap is not shown m figure 4 for sake of clarity.
• At least the radiating element with an open end 101 of the contact device 100 is moulded m said contact plug 401.
• at least the radiating element 101 with an open end of the contact device 100 is moulded m said base 402.
• the plug is omitted.
• a protrusion, flange or similar means (not shown m the figure) m said base being adapted to press said contact device 100 at its U shaped second contact part 102 to said part 405 being the contact area of said radiating element 403.
• said first radiating element 403 is a meander shaped conductive area arranged on a thin flexible dielectric carrier.
• said radiating element 403 could be one or a plurality of helixes.
• the distance between a first end of the contact device and a second end of the contact device along said first contact part 104, said elongated part 103, said second contact part 102 and said radiating element 101 with an open end is about ⁇ /2, where ⁇ is the wavelength of the frequency band to be transmitted or received.
• said distance between the first and second ends is about ⁇ /4, where ⁇ is the wavelength of the frequency band to be transmitted or received by the antenna device 400.
• the length of the radiating element with an open end 101 is about ⁇ /4 when said distance between the first and second ends is about ⁇ /2 or alternatively ⁇ /8 when said distance between the first and second ends is about ⁇ /4, where ⁇ is the wavelength of the frequency band to be transmitted or received as mentioned above.
• the frequency band at which the radiating element 101 is operating at a higher frequency compared to the operating frequency band of the radiating element 403.
• the contact device 100 is preferably manufactured by stamping or cutting out the structure from a conductive plate e.g. metal plate and thereafter bending said structure to a predetermined shape .

Landscapes

• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Details Of Aerials (AREA)
• Transceivers (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20278507

Family Applications (1)

Country Status (3)

Cited By (3)

Citations (8)

• 2000
  • 2000-02-18 SE SE0000539A patent/SE516485C2/sv not_active IP Right Cessation
• 2001
  • 2001-02-19 AU AU34310/01A patent/AU3431001A/en not_active Abandoned
  • 2001-02-19 WO PCT/SE2001/000363 patent/WO2001061782A1/en active Application Filing

Patent Citations (8)

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