Classifications

• • 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
  • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
  • H01Q9/0414—Substantially flat resonant element parallel to ground plane, e.g. patch antenna in a stacked or folded configuration
• • 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
  • H01Q1/243—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 with built-in antennas
• • 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
  • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
  • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the 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
  • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
  • H01Q9/0471—Non-planar, stepped or wedge-shaped patch

Definitions

• the invention relates to a low-profile dual or multi-band antenna, in particular for motor vehicles according to the preamble of claim 1.
• German and European mobile radio networks in particular, communication takes place in the 900 MHz or the so-called 1800 MHz band. In the USA in particular, transmission takes place in the so-called 1900 MHz range. The next upcoming UMTS networks will be set up in the 2000 or 2100 MHz band range.
• Low-profile antennas are desired, in particular in the motor vehicle sector, which should have the best possible electrical properties, ie in particular a high bandwidth, good omnidirectional characteristics and a compact design.
• dual band patch antennas have already been proposed, known among other things as "stacked dual-freguency-microstripe" '-PIF antennas.
• An antenna of this type known from the prior art has an area radiator parallel to it over a metallic base area or base plate, which is short-circuited to the metallic base plate on its one long side by a short circuit running perpendicular to the area radiating element and to the base plate.
• the length and width and thus the size of the surface radiating element is adapted, for example, to the lowest frequency to be transmitted, for example to the 900 MHz band.
• a surface radiator that is comparable in principle is constructed, which is provided for the transmission of a higher frequency band range and is correspondingly smaller in size. With a generally smaller longitudinal and transverse extension, it sits with a further flat radiator element in the top view rather in the center on the larger dimensioned flat radiator element located underneath, and also in parallel to it. On its one long side, preferably on the same long side as the panel radiator element for the lowest frequency band range, it is connected to the panel radiator element located below via a short circuit.
• the short-circuit element is preferably also oriented perpendicular to the two surface radiating elements.
• the feed takes place via a feed line, preferably running perpendicular to the surface radiating elements.
• device which is guided from a feed point, for example an adaptation network, in the area of the base plate, from which the feed point is insulated, essentially vertically upwards to the underside of the surface radiating element located at the top.
• a corresponding passage opening is provided in the surface radiator element located below, in order to guide the feed line to the surface radiator element located at the top.
• the low-profile dual or multi-band antenna according to the invention is characterized in that its essential parts are formed from a complete one-piece stamped and bent part.
• At least two surface radiator elements for transmission in two frequency bands and a short circuit acting between them are made and formed from a single sheet metal stamped part.
• the corresponding short circuit for connecting the area radiator element provided for the lowest frequency band range (that is, that adjacent to the metallic one) is also provided Base plate provided area radiator element) a part of the entire one-piece stamped and bent part, that is, a common part of the one-piece surface antenna.
• the feed line which runs essentially perpendicular to the surface radiating elements, is also designed as a stamped and bent part, namely as part of the entire stamped and bent part.
• the entire structure can be cascaded several times, so that not only two, but also at least three differently dimensioned, essentially parallel planar radiating elements are formed, so that the compact antenna can also radiate and receive, for example, as a multi-band antenna in three band ranges.
• the dual or multi-band antenna can have flat radiating elements which are not necessarily formed at different altitudes relative to one another, but rather at a common vertical position, in which case the short circuit between two flat radiating elements is then likewise arranged on the same vertical line is.
• the surface radiating elements can be provided with parallel and vertical cutting and bending edges essentially in plan view. It is also possible, however, that the punched edges of the higher surface elements facing outwards for transmission in the higher frequency band range, for example from their short-circuit connections are formed slightly diverging towards the free end or converging towards the inside or have inclined end edge regions, in particular in their free end. Likewise, the punched edges of the lower-lying surface elements can be designed to run obliquely, the punched edges not necessarily running parallel inside and outside.
• the antenna wings are extended by a further downward bend.
• the short-circuit connections also do not have to be designed for the entire width of the respective surface element. They can be made shorter than the adjacent transverse extent of the respective surface element.
• Figure 1 a first perspective view of a first dual-band antenna
• Figure 2 is another perspective view of the dual band antenna shown in Figure 1;
• FIG. 3 a corresponding rear side view of that shown in FIGS. 1 and 2
• FIG. 4 shows a corresponding top view of the surface antenna according to FIGS. 1 to 3;
• FIG. 5 shows a plan view of a metallic starting plate (sheet metal) on which the punching and bending lines for producing an antenna according to FIGS. 1 to 4 are drawn;
• FIG. 6 shows an exemplary embodiment of a corresponding surface antenna modified from FIG. 1;
• FIG. 7 shows a top view of the exemplary embodiment according to FIG. 6;
• Figure 8 another modified embodiment of a surface antenna in a perspective view
• FIG. 9 shows a top view of the illustration according to FIG. 8.
• Figure 10 shows another modified embodiment in perspective
• FIG. 11 shows a further exemplary embodiment of a dual-band antenna with antenna areas at the same height
• FIG. 12 a further exemplary embodiment in a perspective illustration with antenna wings extended downwards;
• Figure 13 a rear side view of the
• FIG. 14 a further exemplary embodiment in a perspective illustration with regard to a three-band antenna.
• FIG. 15 a side view of the exemplary embodiment according to FIG. 14.
• FIG. 1 to 4 show a first exemplary embodiment of a low-profile, compact dual-band antenna according to the invention, which consists of two flat radiating elements or flat radiators 3a and 3b which are arranged parallel to one another.
• Such an antenna element is usually provided with a larger metallic surface or base plate 7, i.e. connected or a corresponding antenna is attached, for example when used on the motor vehicle, to a corresponding location on the body panel of the vehicle, which then serves as a metallic counter surface or base.
• the lower surface element or the lower surface radiator 3a is tuned for transmission in a lower or lower frequency band, for example in the 900 MHz band range.
• the smaller-sized area radiator 3b constructed above is tuned, for example, for transmission in the 1800 MHz band range.
• the upper surface radiator 3b is connected on its narrower boundary side or edge 9b on the left in FIG. 1 via a short circuit 11b to the larger surface radiator 3a located underneath, wherein the short circuit 11b in the exemplary embodiment shown has a width which corresponds to the width of the upper surface radiator 3b.
• the lower surface radiator 3a is likewise equipped on its narrow boundary side 9a on the left, likewise via a vertical short-circuit surface 11a, by means of which an electrical connection to the mentioned electrical base surface or base plate 7 is usually established.
• the upper and lower surface radiators are each equipped in such a way that a part of the respective surface radiator element consists of a closed metal surface section 103a or 103b, on which there are then two in the transverse direction of the antenna radiator on the opposite side to short-circuit 11a or 11b.
• FIG. 5 shows a metallic starting plate in which the corresponding stamped lines 19 are dash-dotted and the bent edge 20 are dotted.
• the surface radiating element 3b for the higher frequency band range can then be brought into a higher parallel position with the surface radiating element 3a below, as shown in FIGS. 3a and 3b can be seen.
• the short circuits 11a and 11b set up perpendicular to the plane dex panel radiator elements.
• a feed line 25 is also necessary, which is preferably provided perpendicular to the plane of the surface radiating elements and is guided from below to the underside of the surface radiating element 3b located above.
• this feed line 25 is also produced as a stamped and bent part, for which purpose the top surface radiator 3b has a slot-shaped recess 27, leaving behind a bending edge 29 formed on the left at the end of the slot-shaped recess 27, as a result of which a narrow metal strip can be bent vertically downward to form the feed line 25 mentioned.
• the plate-shaped starting material is thus used almost over the entire surface, since that between the outer side edges 31 of the upper surface radiator element 3b and the inner side edges 33 of the surface radiator element located below is formed only by a punching or cutting line 19, without the material having to be punched out.
• a " respective short circuit 11a or 11b is made narrower in the transverse direction of the surface radiating elements, which is why, when the stamping and bending process is carried out, corresponding material surfaces have to be punched out from an initial metal plate.
• the leading ends of the antenna wings 203a and 203b are not provided at their free end with terminating or cutting edges 35 running perpendicular to the longitudinal extension of the antenna wings, but rather with terminating or cutting edges 35 which converge obliquely from the outside inwards.
• the outer cutting edges 31 of the respective higher surface radiator are designed to converge from the short-circuit side to the free end, and in the process parallel to the correspondingly converging inner cutting edges 33 of the lower surface radiator element 3a.
• the antenna wings 203a of the lower-lying surface radiating element have an increasingly greater width and extension towards their free end.
• the outer terminating or cutting edge can also be designed to converge again, the antenna wings 203a of the lower surface radiating element then touching or almost touching one another with their leading end tips.
• the feed line piece likewise produced as a stamped or bent part is progressively narrower from top to bottom becoming metal strips, that is to say formed as metal strips with converging, laterally opposing punched edges 39 running towards one another.
• the short circuit 11a is trapezoidal from bottom to top, at least with regard to the surface radiating element for the lower frequency band range.
• the antenna surfaces and also the antenna wings for the different frequency band ranges can also be arranged in a common height plane, that is to say arranged in a 0 or fork shape, so that in this exemplary embodiment also the short circuit 11b, which connects the two surface radiating elements 11b and 11a connects, comes to lie in a common height arrangement.
• a multi-band antenna can also be constructed, namely if the corresponding cascading of the two surface radiating elements explained in the drawings is supplemented, for example, by a third surface radiating element, which is of smaller dimensions and builds up on the second surface radiating element in a correspondingly repetitive manner.
• the overall antenna formed in this way can be produced as the only stamped and bent part, that is to say it can have a one-piece construction.
• the radiator wings 203a of the lowermost surface radiator are provided with antenna wing sections 203a ′ which are elongated downwards, as a result of which the advantage can be realized that the antenna wings.
• 203a can be shortened overall compared to other exemplary embodiments and are also mechanically more stable.
• the corresponding antenna wing sections 203a f are formed on the outer edge of the antenna wings with bent metal sections projecting vertically downward.
• antenna wing sections can alternatively or additionally be provided on an antenna wing 203b on a surface radiator 3b for transmission in a higher frequency band.
• FIGS. 14 and 15 show a corresponding type of antenna which is suitable for radiating in three bands which are offset from one another.
• the corresponding structure of the surface radiator 3b has been cascaded again, in a quasi-cascaded manner, by a smaller surface radiator 3c located above it, which also has corresponding radiator wings 303a.
• the connection to the radiator 3b located underneath is also made via a corresponding short circuit 11c.
• the feed takes place via a feed line 25, which leads to the top surface radiator 3c.
• the antennas explained are so-called PIF antennas, ie so-called "planar inverted F antennas". It is known that in the case of such antennas, the design and the position of the feed point and the short circuits can influence the properties of the respective antenna. Therefore, the design and the location of the feed point and the short circuits affect the properties of the antennas Influences of the respective vehicle body and the "" respective installation location individually adjusted.
• the short circuits for example the short keys 11a and 11b, are each located on the narrow side of the antenna arrangement, which is preferably fundamentally longitudinally symmetrical (ie symmetrical to a vertical central longitudinal plane).
• the feed point of the antenna is preferably provided on this longitudinal line of symmetry or plane of longitudinal symmetry of the antenna.
• the location and distance of the feed point in relation to the short circuit can also be used to adjust the antenna impedance, which is usually 50 ohms for car radio antennas.

Landscapes

• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Waveguide Aerials (AREA)
• Details Of Aerials (AREA)
• Support Of Aerials (AREA)
• Transmitters (AREA)
• Variable-Direction Aerials And Aerial Arrays (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=30009992

Family Applications (1)

Country Status (11)

Families Citing this family (38)

Family Cites Families (16)

• 2002
  • 2002-07-15 DE DE10231961A patent/DE10231961B3/de not_active Expired - Fee Related
• 2003
  • 2003-06-12 EP EP03738023A patent/EP1522120B1/fr not_active Expired - Lifetime
  • 2003-06-12 AT AT03738023T patent/ATE306128T1/de not_active IP Right Cessation
  • 2003-06-12 ES ES03738023T patent/ES2247548T3/es not_active Expired - Lifetime
  • 2003-06-12 BR BR0312716-8A patent/BR0312716A/pt not_active IP Right Cessation
  • 2003-06-12 CN CNB038168073A patent/CN100435411C/zh not_active Expired - Fee Related
  • 2003-06-12 US US10/521,094 patent/US7158082B2/en not_active Expired - Lifetime
  • 2003-06-12 JP JP2004520391A patent/JP4156590B2/ja not_active Expired - Fee Related
  • 2003-06-12 WO PCT/EP2003/006199 patent/WO2004008573A1/fr active IP Right Grant
  • 2003-06-12 AU AU2003245936A patent/AU2003245936A1/en not_active Abandoned
  • 2003-06-12 DE DE50301327T patent/DE50301327D1/de not_active Expired - Lifetime
• 2006
  • 2006-01-19 HK HK06100854.9A patent/HK1080998A1/xx not_active IP Right Cessation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events