EP1195846A2 - Antenne à plaque pour la bande des micro-ondes - Google Patents

Antenne à plaque pour la bande des micro-ondes Download PDF

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Publication number
EP1195846A2
EP1195846A2 EP01000522A EP01000522A EP1195846A2 EP 1195846 A2 EP1195846 A2 EP 1195846A2 EP 01000522 A EP01000522 A EP 01000522A EP 01000522 A EP01000522 A EP 01000522A EP 1195846 A2 EP1195846 A2 EP 1195846A2
Authority
EP
European Patent Office
Prior art keywords
resonator
pattern
patch pattern
antenna
metallization
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP01000522A
Other languages
German (de)
English (en)
Other versions
EP1195846A3 (fr
Inventor
Indra Dr. c/o Philips Corporate Ghosh
Rebekka Dr. c/o Philips Corporate Porath
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Intellectual Property and Standards GmbH
Philips Corporate Intellectual Property GmbH
Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Intellectual Property and Standards GmbH, Philips Corporate Intellectual Property GmbH, Koninklijke Philips Electronics NV filed Critical Philips Intellectual Property and Standards GmbH
Publication of EP1195846A2 publication Critical patent/EP1195846A2/fr
Publication of EP1195846A3 publication Critical patent/EP1195846A3/fr
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
    • 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
    • H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • 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
    • 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

Definitions

  • the invention relates to a patch pattern antenna (patch antenna), in particular for the Microwave range, with at least one stain pattern resonator with a metallic Stain pattern and a masee metallization as well as a feed for the feed electromagnetic energy.
  • electromagnetic waves are in the microwave range used to transmit information.
  • GSM900 GSM mobile phone standard in the frequency range from 890 to 960 MHz (GSM900) and from 1710 to 1880 MHz (GSM1800 or DCS), still the UMTS band (1970 to 2170 MHz), the DECT standard for cordless phones in the frequency range from 1880 to 1900 MHz, as well as the new Bluetooth standard in the frequency range from 2400 to 2480 MHz, which is used to transfer data between, for example, cell phones and other electronic ones Exchange devices such as computers, other mobile phones, etc.
  • a dielectric with a dielectric constant ⁇ r > 1 can be used as the basic building block of the antenna. This leads to a reduction in the wavelength of the radiation in the dielectric by a factor of 1 / ⁇ r ,. An antenna designed on the basis of such a dielectric will therefore also be smaller in size by this factor.
  • the so-called patch pattern or patch antenna is an antenna type in which the miniaturization can be used by means of the dielectric constant ⁇ r . It consists of a solid block of dielectric material with ⁇ r > 1. The height of the block is typically a factor of 3-10 smaller than its length and width. The block is wholly or partly provided with a metallic stain pattern on one surface, with a mass metallization on the other surface. Electromagnetic resonances form between these electrodes, the frequencies of which depend on the dimensions of the electrodes and the value of the dielectric constant ⁇ r of the block.
  • the values of the individual resonance frequencies decrease with increasing lateral dimensions of the antenna and - as described above - with increasing values of the dielectric constant ⁇ r .
  • ⁇ r the mode with the lowest frequency from the resonance spectrum. This mode is called basic mode.
  • a further miniaturization step consists in the additional insertion of a conductive one Connection (short-circuit conductor) in the dielectric between the two electrodes.
  • a conductive one Connection short-circuit conductor
  • Patch pattern resonators with or without short-circuit conductors can be stacked vertically.
  • This configuration is called a multi-layer patch pattern antenna.
  • the number the basic mode of the multi-layer patch pattern antenna is equal to the number of constituent patch pattern resonators. Is the frequency distance between the Basic modes smaller than their bandwidth, the total bandwidth of the Antenna can be raised.
  • this type of antenna also has two major disadvantages.
  • multi-layer patch pattern antennas with short-circuit conductors have so far been successful only via a coaxial line to feed the antenna with electromagnetic power and to a limited extent adjust the input impedance of the antenna so that only little reflections on the feed structure occur.
  • This type of feed is available however, an SMD integration on a circuit board (PCB) of a mobile phone in the Ways there to supply the electromagnetic power to the circuit board Suitable pens must be applied from below through the metallization lead, so that the antenna is not together with the other components by surface mounting (SMD technology) can be soldered to the board.
  • PCB circuit board
  • SMD technology surface mounting
  • One object of the invention is therefore a patch pattern antenna to create the type mentioned, which also with short-circuit conductor for surface mounting (SMD) is suitable on a circuit board.
  • SMD surface mounting
  • the invention is also based on the object of providing a patch pattern antenna which, with small dimensions, is a sufficient bandwidth for the applications mentioned even without the use of dielectrics with different dielectric constants having.
  • the invention is intended to create a patch pattern antenna in which the input impedance can be adjusted so that the input to the antenna Power is not reflected on the antenna, but essentially completely radiated without the antenna having to have a coaxial feed.
  • a patch pattern antenna should also be created, which is characterized by a particularly wide range.
  • a patch pattern antenna of the type mentioned at the outset is created, which is characterized in that the feed comprises at least one first metallization piece, which extends on a first side face of the resonator between the ground metallization and the metallic patch pattern, wherein the input impedance of the antenna is determined by the dimensions of this metallization piece.
  • the input impedance can be optimally matched to a specific installation situation in a simple manner (for example by laser trimming), so that no reflections occur on the antenna and the supplied electromagnetic power is essentially completely radiated.
  • this antenna can also be equipped with a short-circuit conductor.
  • a patch antenna of the type mentioned which is achieved by a line resonator distinguished, which is formed by a line applied to at least one substrate, and that for the resonant coupling of the electromagnetic supplied to the feed Energy is used in the at least one speckle pattern resonator.
  • This resonant coupling mechanism the formation of the stain pattern resonances is not impaired and the bandwidth of the antenna essentially by adding another resonance Dimensions can be increased further.
  • This antenna is also for SMD mounting and suitable for equipping with a short-circuit conductor.
  • the embodiment according to claim 2 is a particularly simple surface assembly the antenna in SMD technology possible because the second metallization piece together with the ground metallization can be soldered directly onto a circuit board.
  • the embodiment according to claim 3 has the particular advantage that by the two Resonators the bandwidth is further increased, even if substrates with the same Dielectric or permeability number are used, and that they are also used for equipment with a short-circuit conductor is suitable.
  • the embodiment according to claim 5 has the particular advantage that the coupling strength between the line resonator and the speckle pattern resonator via a Dimensioning of the end section can be adjusted. Another advantage of this version, as well as that according to claim 7, is that the frequency of the resonant coupling by appropriate dimensioning of the length of the above Lines can be set.
  • the embodiment according to claim 6 enables an adjustment of the coupling strength between the feed and the line resonator.
  • the bandwidth of the antenna can be increased further are, while with the embodiments according to claims 9 and 10 in essentially the degree of miniaturization of the antenna can be further increased.
  • the antenna according to the invention is particularly advantageous on a printed one Circuit board according to claim 11 or in a mobile telecommunications device usable according to claim 12.
  • the patch pattern antennas shown in Figures 1, 3 and 5 consist of several Layers together, each shown drawn apart in the vertical direction are and in the assembled state a patch pattern antenna with two individual Form speckle pattern resonators.
  • Each layer is covered by a ceramic Substrate formed in the form of a substantially cuboid block, the height in is generally 3 to 10 times smaller than its length or width. From that starting in the following description, those in the illustrations of the figures upper and lower surfaces of the substrates as the upper and lower end faces and the in contrast, smaller vertical surfaces are called side surfaces.
  • a cuboid substrate it is also possible instead of a cuboid substrate to choose other geometric shapes such as a cylindrical shape on which one Corresponding resonant conductor structure with, for example, a spiral course is applied.
  • the substrates can be produced, for example, by embedding a ceramic powder in a polymer matrix and have a dielectric constant of ⁇ r > 1 and / or a permeability number of ⁇ r > 1.
  • the first embodiment of the antenna shown in FIG. 1 comprises two layers, which in FIG assembled state a lower first and an upper second Form spot pattern resonator 10 and 20, respectively.
  • the first resonator 10 comprises a first one Substrate 11, on the lower end face of which a mass metallization 12 is applied.
  • the upper end face of the first substrate 11 carries a first metallic stain pattern 13, which extends over most of the upper end face, only marginal areas 111 of this upper end face remain free.
  • Between the ground metallization 12 and the First patch pattern 13 extends a first section 14 of a short-circuit conductor.
  • a feed 15, 17, which is in through a first metallization on this side surface Form of one extending in the direction of the upper end face of the substrate Strip conductor 17, and a second metallization piece 15 is formed, which on the lower End face lies in an area 16 in which the ground metallization 12 is left out.
  • the feed is thereby insulated from the ground metallization 12.
  • the second patch pattern resonator 20 is formed by a second substrate 21 a second metallic stain pattern 23 is applied to the upper end face thereof extends over the entire upper end face. Also located in the second Substrate 21 a second section 24 of the short-circuit conductor. If the antenna through Assembling the two resonators in the direction of arrow A is assembled, the second section 24 continues the first section 14 so that the short-circuit conductor arises.
  • An essential core of this first embodiment of the antenna is based on the surprising one Realization that, contrary to the prevailing view, also with a Non-coaxial feed 15, 17 of the type described an electromagnetic coupling Energy into a patch pattern antenna is possible, even then, if this is provided with a short-circuit conductor with which the dimensions of the Antenna can be further reduced.
  • the input impedance of the antenna can be changed by suitable Selection of the height and width of the stripline 17 can be adjusted, so that an optimization can be made with regard to low reflections on the antenna and thereby the vast majority of the electromagnetic supplied to the antenna Power is radiated.
  • the feeder or the strip conductor 17 can also consist of several metallic ones There are pieces of variable width.
  • the antenna together with other components in the usual way by surface mounting (SMD) on one Circuit board can be mounted.
  • SMD surface mounting
  • the ground metallization can also be done in this way 12 soldered to the board with a corresponding ground connection become.
  • Another advantage of this embodiment is that for the first and second Substrate 11, 21 the same material can be used, which is not as in previous ones Patch pattern antennas with short-circuit conductor, different dielectric values must have in order to achieve a sufficient bandwidth of the antenna.
  • the frequency bandwidth required for the above-mentioned applications achieved, among other things, in that the antenna consists of (at least) two Layers, i.e. two patch pattern resonators 10, 20 is put together, the Individual resonances in an operating mode differ due to the different size of the first and second stain pattern 13, 23 differ somewhat from each other.
  • the stain patterns can be identical.
  • the coupling of the two resonators splits the nominally identical resonance frequencies and thus an increase in the frequency bandwidth.
  • the dimensions of the substrates 11, 21 are each approximately 19.4 x 10.9 x 2.0 mm 3 .
  • the lower first spot pattern 13 has dimensions of approximately 17.0 ⁇ 8.5 mm, while the upper second spot pattern 23 essentially completely covers the surface of the second substrate 21.
  • the bulk metallization 12 Apart from the recess 16 for the second metallization piece 15, the bulk metallization 12 essentially completely covers the lower end face of the first substrate 11.
  • the lateral strip conductor 17 is approximately 1.8 mm wide and approximately 2.0 mm high. It continues on the lower end face of the first substrate 11 in the form of the second metallization piece 15 with a length of approximately 0.5 mm.
  • the short-circuit conductor 14, 24 has a diameter of approximately 0.5 mm, a distance in both lateral directions from both corners of the substrates 11, 21 of approximately 3.5 mm and runs in the two substrates between the metallizations.
  • Figure 2 shows a reflection diagram for this antenna, i.e. the ratio R [dB] between the power reflected at the antenna and that supplied to the antenna Power over the frequency F [GHz]. It is clearly the individual resonances of the two Detect layers (speckle pattern resonators) that broaden the Contribute to the overall bandwidth of the patch pattern antenna.
  • FIG. 3 shows a second embodiment of an antenna according to the invention, which is made up of a microstrip line resonator 10 ', and above it a first or second patch pattern resonator 20 or 30 is composed.
  • the microstrip line resonator 10 ' comprises a first substrate 11', which is attached to its in the representation of the upper end face is coated with a ground metallization 12 '.
  • a meandering microstrip line 18 'applied On the lower end face of this first layer is a meandering microstrip line 18 'applied, which begins at a feed 15' and on a side surface of the substrate 11 'is guided upwards.
  • a short circuit between the ground metallization 12 'and the microstrip line 18' during the upward movement must be prevented become. This can be done, for example, by shortening the mass metallization accordingly 12 'reached on the relevant side surface of the first substrate 11' become.
  • the feed 15 ' engages in a U-shape around the beginning of the microstrip line 18', wherein there is a gap or gap between the two, with the size of the coupling strength is set between the two.
  • the resonance frequency of this microstrip resonator 10 ' is, as usual, essentially due to the length of the microstrip line 18 'determined.
  • a first section 14 ' can also be one Short-circuit conductor.
  • the first speckle pattern resonator 20 is formed by a second substrate 21 which is on its upper end face carries a first metallic stain pattern 23, a circumferential one Edge area 211 of the upper end face remains free.
  • a side surface 213 of the Substrate 21 is an end portion 28, which in the assembled state Antenna continues and terminates the microstrip line 18 '.
  • This end section can determine the strength of the coupling to the first speckle pattern resonator 20 can be determined.
  • Located in the first speckle pattern resonator 20 further a second section 24 of the short-circuit conductor.
  • the second patch pattern resonator 30 is formed by a third substrate 31 which is on carries a second metallic stain pattern 33 on its upper end face, again a peripheral edge region 311 of the upper end face remains free.
  • a third section 34 of the short-circuit conductor runs through the patch pattern resonator 20.
  • the first and second metallic stain patterns 23, 33 can be the same as in the case of the first embodiment also different dimensions on the substrates 21 or 31 have.
  • a multi-layer patch pattern antenna results with resonant coupling of the electromagnetic Energy compared to a multilayer patch pattern antenna without a resonant Coupling leads to a further increase in bandwidth.
  • This configuration is based on the surprising finding that the resonance frequencies the basic modes of the individual speckle pattern resonators by a resonant coupling with a microstrip line resonator 10 'of the described Type are only slightly disturbed. This is especially true when a short-circuit conductor 14 ', 24, 34 is used.
  • the mass metallization 12 ' represents the same time Ground of the first patch pattern resonator 20 and the microstrip line resonator 10 '.
  • the generation of the individual stain pattern resonances also increases the bandwidth of a corresponding multilayer patch pattern antenna.
  • the resonance frequency of the microstrip line resonator 10 'can be known can be set over the length of the microstrip line 18 ', 28.
  • the coupling between the feed 15 'and the microstrip line can also 18 ', 28 adjusted by appropriate choice of the gap width between the two become.
  • This second embodiment also has the advantage that it can be used together with other components through surface mounting (SMD technology) on a circuit board (PCB) can be applied.
  • the feed 15 ' is on a corresponding Strip conductor of the board soldered, through which the electromagnetic energy to be radiated is fed.
  • the bulk metallization 12 ' can be via a metallization feed (not shown) on the first substrate 11 'with a ground connection of the board to be soldered.
  • Another advantage of this embodiment is that it is unlike resonant Couplings with known slot resonators the geometries of the ground metallizations 23, 33 of the speckle pattern resonators 20, 30 are essentially unchanged can stay. This makes the design of Multi-layer patch pattern antennas, especially those with short-circuit conductors.
  • the dimensions of the second and third substrates 21, 31 each amount to approximately 19.0 x 10.5 x 2.0 mm 3 .
  • the dimensions of the first substrate 11 are approximately 19.0 x 10.5 x 1.0 mm 3 .
  • the two spot patterns 13, 23 have dimensions of approximately 17.0 ⁇ 8.5 mm 2 .
  • the short-circuit conductor has a diameter of approximately 0.5 mm and a spacing of approximately 2.4 mm in each of the two lateral directions from a corner of the spot pattern and runs through the three layers 10, 20, 30.
  • the ground metallization 12 has a Length of about 18.5 mm and a width of about 10.5 mm.
  • the microstrip line resonator (stripline width about 0.36 mm) runs under the ground metallization 12 'in a meandering manner on an NP0-K17 substrate with a height of about 1.0 mm. The vertical end of this resonator first has a width of approximately 0.3 mm over a length of approximately 1.0 mm and then a width of approximately 1.4 mm over a length of approximately 1.8 mm. The total length of the microstrip line is thus approximately 42.93 mm.
  • the distance between the start of the microstrip line 18 'and the feed 15', which wraps around it in a U-shape is approximately 0.18 mm on all sides.
  • Figure 4 shows a diagram of the course of the reflection properties, that is Ratio R [dB] between the power reflected on the antenna structure and that power supplied to the antenna, above frequency F [GHz].
  • Ratio R [dB] Ratio R [dB] between the power reflected on the antenna structure and that power supplied to the antenna, above frequency F [GHz].
  • FIG. 5 shows a third embodiment of an antenna according to the invention, which differs from the second embodiment essentially differs in that the resonant Electromagnetic energy is not coupled in through a microstrip line resonator 10 ', but with one formed by a so-called printed wire antenna Line resonator ("Printed Wire Resonator") 19, 29 is made, in which it is of the type of a wire antenna resonator passing through a substrate of the type mentioned at the beginning is formed with a printed conductor track 192, 292.
  • Printed Wire Resonator printed wire antenna Line resonator
  • the conductor track 192, 292 is electrically connected to the signal conductor of a feed 15 and can reach energy in the form of Blast waves.
  • the values of the resonance frequencies are known from the Dimensions of the printed conductor track and the dielectric or permeability number depending on the substrate.
  • a first speckle pattern resonator 10 is formed by a first substrate 11 thereon a ground metallization 12 is applied to the lower end face. On part of the upper one The end face of the first substrate 11 is located in the longitudinal direction of the substrate 11 extending first metallic stain pattern 13. Parallel to it is along a side surface of the first substrate 11 a first part 19 of the resonator arranged by a first edge region 191 of the first substrate 11 with one printed thereon first conductor track section 192 is formed.
  • the conductor track section is with a feed 15 connected to the lower end face of the substrate 11, which during surface mounting the antenna with a corresponding feed line for electromagnetic Energy is soldered. It is also along another side surface of the substrate 11, a first section 14 of a planar short-circuit conductor is arranged.
  • a second patch pattern resonator 20 is formed by a second substrate 21 a second metallic stain pattern 23 is applied to the upper end face thereof.
  • a second resonator part 29 arranged through a second edge region 291 of the second substrate 21 with a second conductor track section printed thereon 292 is formed.
  • a second section 24 of the planar short-circuit conductor arranged, the first section 14 in assembled. Condition of the antenna continues and thus the Short-circuit conductor forms.
  • the two conductor track sections 192, 292 continue to complement one another to form a common conductor track which runs essentially in a meandering manner along the side and part of the end face of the substrates and is excited to resonate when electromagnetic energy is fed in , Together with the thereby excited resonances of the patch pattern resonators 10, 20, which also differ somewhat from one another due to the different areas of the metallic patch patterns 13, 23, a relatively large bandwidth of the patch pattern antenna is achieved, similar to the illustration in FIG.
  • the electromagnetic coupling to the patch pattern resonators 20, 30 again takes place via the stray fields of the printed wire resonators 19, 29.
  • This third embodiment also has essentially the same advantages as were described in connection with the second embodiment.
  • the patch pattern antennas according to the invention are (in addition to the DECT and Bluetooth band) Particularly suitable for use in mobile phones, since they are small in size connect with a bandwidth sufficient for the GSM and UMTS bands and simultaneously with the other electronic components through surface mounting (SMD technology) can be applied to a printed circuit board.
  • DECT and Bluetooth band Particularly suitable for use in mobile phones, since they are small in size connect with a bandwidth sufficient for the GSM and UMTS bands and simultaneously with the other electronic components through surface mounting (SMD technology) can be applied to a printed circuit board.
EP01000522A 2000-10-09 2001-10-08 Antenne à plaque pour la bande des micro-ondes Ceased EP1195846A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10049843A DE10049843A1 (de) 2000-10-09 2000-10-09 Fleckenmusterantenne für den Mikrowellenbereich
DE10049843 2000-10-09

Publications (2)

Publication Number Publication Date
EP1195846A2 true EP1195846A2 (fr) 2002-04-10
EP1195846A3 EP1195846A3 (fr) 2004-01-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01000522A Ceased EP1195846A3 (fr) 2000-10-09 2001-10-08 Antenne à plaque pour la bande des micro-ondes

Country Status (7)

Country Link
US (1) US6545641B2 (fr)
EP (1) EP1195846A3 (fr)
JP (1) JP2002185241A (fr)
KR (1) KR20020028801A (fr)
CN (1) CN1357941A (fr)
DE (1) DE10049843A1 (fr)
TW (1) TW543241B (fr)

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EP1195846A3 (fr) 2004-01-28
KR20020028801A (ko) 2002-04-17
US20020047804A1 (en) 2002-04-25
DE10049843A1 (de) 2002-04-11
JP2002185241A (ja) 2002-06-28
US6545641B2 (en) 2003-04-08
CN1357941A (zh) 2002-07-10
TW543241B (en) 2003-07-21

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