WO2008122831A1 - An antenna arrangement and antenna housing - Google Patents

An antenna arrangement and antenna housing Download PDF

Info

Publication number
WO2008122831A1
WO2008122831A1 PCT/IB2007/002217 IB2007002217W WO2008122831A1 WO 2008122831 A1 WO2008122831 A1 WO 2008122831A1 IB 2007002217 W IB2007002217 W IB 2007002217W WO 2008122831 A1 WO2008122831 A1 WO 2008122831A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
slot
antenna arrangement
housing
arrangement
Prior art date
Application number
PCT/IB2007/002217
Other languages
French (fr)
Inventor
Aimo Arkko
Jani Ollikainen
Original Assignee
Nokia Corporation
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 Nokia Corporation filed Critical Nokia Corporation
Priority to GB1000230.1A priority Critical patent/GB2463421B/en
Priority to EP07789596A priority patent/EP2165385A4/en
Priority to CN200780052530.9A priority patent/CN101641826B/en
Priority to KR1020097021041A priority patent/KR101283070B1/en
Priority to DE202007019033U priority patent/DE202007019033U1/en
Priority to CA2693560A priority patent/CA2693560C/en
Priority to PCT/IB2007/002217 priority patent/WO2008122831A1/en
Priority to US12/595,056 priority patent/US8432321B2/en
Publication of WO2008122831A1 publication Critical patent/WO2008122831A1/en

Links

Classifications

    • 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
    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • 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
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • 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
    • H01Q13/10—Resonant slot antennas
    • H01Q13/18—Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity ; Open cavity antennas

Definitions

  • Embodiments of the present invention relate to an antenna arrangement and/or an apparatus housing an antenna arrangement.
  • the housing is conductive.
  • a conductive enclosure shields the interior cavity defined by the enclosure from electromagnetic (EM) radiation.
  • the conductive material forms a block to photons and the effectiveness of the block depends upon the thickness of the material, the frequency of the photon and the electromagnetic properties of the material (electrical conductivity and magnetic permeability). For metal at radio frequencies, thin layers can provide effective high impedance shields.
  • a metallic housing may be used for a number of reasons. It may, for example, provide a good electrical earth for the apparatus or it may, if applied as an exterior coat, where it provides a pleasing look and feel.
  • Such technology includes, for example, sensing technology such as RFID, mobile cellular technology such as UMTS, GSM etc, cable-less technology such as Bluetooth and wireless USB and networking technology such as WLAN.
  • an antenna arrangement comprising: an antenna occupying at least a first plane; a conductive structure that is isolated from the antenna but is arranged to be parasitically fed by the antenna, the conductive structure having a slot and occupying at least a second plane different to but adjacent the first plane.
  • an apparatus comprising a conductive housing that defines an interior cavity, an opening in the conductive housing, and an antenna positioned within the cavity adjacent the opening.
  • an antenna arrangement comprising: an antenna having a first resonant wavelength ⁇ ; a conductive housing that is isolated from the antenna but is indirectly fed by the antenna, the conductive housing having a slot that has a length that corresponds to a multiple of ⁇ /4.
  • the impedance a conductive housing presents may be tuned for a particular frequency by carefully positioning and sizing an opening in the conductive housing.
  • the impedance of the housing can, for example, be tuned for a resonant frequency of an antenna thereby enabling the antenna to be placed in the interior of the housing.
  • Fig 1A schematically illustrates in plan view an apparatus comprising a slotted external conductive housing element that houses an antenna
  • Fig 1 B schematically illustrates a cross-sectional view of the apparatus illustrated in Fig 1A;
  • FIG. 1 schematically illustrates in plan view an apparatus comprising an external conductive housing element comprising a meandering slot
  • Fig 3 schematically illustrates in plan view an apparatus comprising an external conductive housing element comprising a slot of variable width; and Fig 4 schematically illustrates in plan view an apparatus comprising an external conductive housing element comprising a slot having an associated electrical tuning circuit.
  • the Figures schematically illustrate an antenna arrangement 10 comprising: an antenna 2 occupying at least a first plane 6; and a conductive structure 12 that is not electrically connected to the antenna 2 but is parasitically fed by the antenna 2, the conductive structure 12 having a slot 14 and occupying at least a second plane different to but adjacent the first plane.
  • Figs 1A and 1 B illustrate an apparatus 1 comprising an external conductive housing element 12 that houses an antenna 2.
  • the housing element 12 forms a conductive structure that almost entirely surrounds a cavity 3 housing the internal antenna 2.
  • the conductive housing element 12 comprises a slot 14 that facilitates the transfer of electromagnetic waves between the exterior of the housing 12 and the antenna 2.
  • the slot 14 is defined by the absence of conductive material in the region of the slot 14.
  • the slot 14 may be an open aperture to the interior cavity 3 or it may be covered by a dielectric that is permeable to electromagnetic radiation such as plastic (other examples are ceramic and ferrite material).
  • the slot 14 may be engraved on a metal foil covering a plastic substrate.
  • the slot 14 has a width W defined as the separation between opposing first and second terminating long edges 21 , 23 of the housing 12.
  • the width W may be constant for the length of the slot or vary along the length of the slot 14.
  • the slot 14 has a length L defined as the separation between opposing first and second terminating short edges 22, 24 of the housing 12.
  • the slot is a region lying within a slot plane 16 and the housing element 12 provides a conductive structure that extends in the slot plane 16. At least a portion of the antenna 2 extends in an antenna plane 6, that is adjacent and parallel to (but separate from) the slot plane 16. The antenna 2 does not extend into the slot plane 16.
  • the position of the antenna 2 relative to the slot 14 is such that it achieves very good or optimal coupling between the antenna 2 and the slotted housing 12.
  • the antenna 2 and the conductive housing element 12 are galvanically isolated such that there is no dc current path between them. They are, however, arranged for electromagnetic coupling and together form an antenna arrangement 10.
  • the antenna 2 has a resonant frequency F and the slot 14 is dimensioned to have an electrical length L' that corresponds to one or more multiples of one quarter of the resonant wavelength corresponding to the first resonant frequency F.
  • n is a natural number
  • L' is the electrical length of the slot 14 and ⁇ is the resonant wavelength
  • the dimensions of the slot result in the housing 12 parasitically resonating with the antenna 2. This results in the characteristics of the antenna arrangement 10 such as bandwidth, efficiency etc being different to that of the antenna 2.
  • the antenna 2 operates as a feed to the antenna arrangement 10.
  • the electrical length L' may be the same as the physical length L of the slot.
  • the characteristics of the resonance of the antenna arrangement 10 may be engineered by varying the physical and/or electrical characteristics of the slot 14. Variations in the physical dimensions of the slot typically affect its associated electrical characteristics such as its electrical length and Q-factor which affect the antenna arrangement's resonant frequency and bandwidth respectively.
  • varying the physical length L of the slot 14 varies its electrical length.
  • Varying the physical position of the slot 14 may affect its electrical characteristics.
  • the slot 14 terminates on an edge 18 of the housing 12, whereas in the examples illustrated in Figs 2 and 3 the slot 14 does not terminate at an edge of the housing but is wholly contained within a face 13 of the housing 12.
  • Increasing the inductance associated with the slot 14 increases the slot's electrical length (which decreases the resonant frequency) and may decrease bandwidth.
  • the electrical length may, for example, be increased by increasing the physical length of the slot.
  • One option is to form the slot from one or more curved sections and another option is to meander the slot 14 as illustrated in Fig 2 (instead of using a straight slot 14 as in Figs 1 and 3).
  • Increasing the capacitance associated with the slot by, for example, decreasing the slot's width as illustrated in Fig 3 (instead of having a constant width W as in Figs 1 and 2) decreases the slot's electrical length (increasing the resonant frequency) and may increase bandwidth.
  • the electrical characteristics of the slot 14 may be engineered using lumped electrical components as an addition or as an alternative to changing the physical characteristic of the slot 14.
  • Fig 4 illustrates a slot 14 that has an electrical circuit 7 connected across the slot 14.
  • the electrical component 7 may comprise one or more lumped components.
  • the electrical characteristics of the antenna arrangement 10 can also be modified by attaching a matching circuit 8 to the antenna 2.
  • the antenna arrangement is able to operate as a receiver and/or a transmitter at one or more of a large number of frequency bands including the following frequency bands: Bluetooth (2400-2483.5 MHz); WLAN (2400-2483.5 MHz); HLAN (5150-5850 MHz); GPS (1570.42-1580.42 MHz); US-GSM 850 (824-894 MHz); EGSM 900 (880- 960 MHz); EU-WCDMA 900 (880-960 MHz); PCN/DCS 1800 (1710-1880 MHz); US- WCDMA 1900 (1850-1990 MHz); WCDMA 2100 (Tx: 1920-1980 MHz Rx: 2110- 2180 MHz); PCS1900 (1850-1990 MHz); UWB Lower (3100-4900 MHz); UWB Upper (6000-10600 MHz); DVB-H (470-702 MHz); DVB-H US (1670-1675 MHz); Wi Max (2300-2400 MHz, 2305-2360 MHz, 2496-2690 MHz, 3300-3400 MHz, 3
  • the apparatus is a mobile cellular telephone
  • the antenna 2 is a chip dielectric (ceramic) monopole feeding antenna and operates at the 2.45 GHz WLAN band. It has dimensions of 9 mm x 3 mm x 2 mm (length, width, height) and is mounted on a piece of copper-free PWB 8 of size 9.75 mm x 7 mm.
  • the length of the antenna 2 is orthogonal and transverse to the length of the slot 14.
  • the distance between the antenna 2 and slot 14 is 1.1 mm
  • the housing 12 provides a homogenous, metallic cover for the apparatus.
  • the physical slot length L is about % of the wavelength at 2.45 GHz.
  • the slot 14 has a constant width W of 2.4 mm and a length L of 25 mm i.e. L> 10*W.
  • the slot 14 terminates, as in Fig s 1A and 1 B, at an edge of the housing 12.
  • the slot 14 may be integrated into ventilation grates of the housing 12.
  • the slot 14 may be covered with a plastic strip.

Landscapes

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

Abstract

An antenna arrangement comprising: an antenna occupying at least a first plane; a conductive structure that is isolated from the antenna but is arranged to be parasitically fed by the antenna, the conductive structure having a slot and occupying at least a second plane different to but adjacent the first plane.

Description

TITLE An antenna arrangement and antenna housing FIELD OF THE INVENTION
Embodiments of the present invention relate to an antenna arrangement and/or an apparatus housing an antenna arrangement. In particular, in some embodiments the housing is conductive.
BACKGROUND TO THE INVENTION
As is well known a conductive enclosure shields the interior cavity defined by the enclosure from electromagnetic (EM) radiation. The conductive material forms a block to photons and the effectiveness of the block depends upon the thickness of the material, the frequency of the photon and the electromagnetic properties of the material (electrical conductivity and magnetic permeability). For metal at radio frequencies, thin layers can provide effective high impedance shields.
- There is a current trend towards using metallic housings for electronic apparatuses. A metallic housing may be used for a number of reasons. It may, for example, provide a good electrical earth for the apparatus or it may, if applied as an exterior coat, where it provides a pleasing look and feel.
It is now becoming common for an electronic apparatus to include wireless RF technology. Such technology includes, for example, sensing technology such as RFID, mobile cellular technology such as UMTS, GSM etc, cable-less technology such as Bluetooth and wireless USB and networking technology such as WLAN.
It would be desirable to provide an apparatus that is functional in one or more of these wireless technologies and uses a conductive housing.
One solution would be to provide one of more external antennas for the apparatus but this is undesirable as it increases the size of the apparatus and also decreases it eye appeal. BRIEF DESCRIPTION OF THE INVENTION
According to some embodiments of the invention there is provided an antenna arrangement comprising: an antenna occupying at least a first plane; a conductive structure that is isolated from the antenna but is arranged to be parasitically fed by the antenna, the conductive structure having a slot and occupying at least a second plane different to but adjacent the first plane.
According to some embodiments of the invention there is provided an apparatus comprising a conductive housing that defines an interior cavity, an opening in the conductive housing, and an antenna positioned within the cavity adjacent the opening.
According to some embodiments of the invention there is provided an antenna arrangement comprising: an antenna having a first resonant wavelength λ; a conductive housing that is isolated from the antenna but is indirectly fed by the antenna, the conductive housing having a slot that has a length that corresponds to a multiple of λ/4.
The inventors have realized that the impedance a conductive housing presents may be tuned for a particular frequency by carefully positioning and sizing an opening in the conductive housing. The impedance of the housing can, for example, be tuned for a resonant frequency of an antenna thereby enabling the antenna to be placed in the interior of the housing.
BRIEF DESCRIPTION OF THE DRAWINGS
For a better understanding of the present invention reference will now be made by way of example only to the accompanying drawings in which:
Fig 1A schematically illustrates in plan view an apparatus comprising a slotted external conductive housing element that houses an antenna Fig 1 B schematically illustrates a cross-sectional view of the apparatus illustrated in Fig 1A;
Fig 2 schematically illustrates in plan view an apparatus comprising an external conductive housing element comprising a meandering slot;
Fig 3 schematically illustrates in plan view an apparatus comprising an external conductive housing element comprising a slot of variable width; and Fig 4 schematically illustrates in plan view an apparatus comprising an external conductive housing element comprising a slot having an associated electrical tuning circuit.
DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION
The Figures schematically illustrate an antenna arrangement 10 comprising: an antenna 2 occupying at least a first plane 6; and a conductive structure 12 that is not electrically connected to the antenna 2 but is parasitically fed by the antenna 2, the conductive structure 12 having a slot 14 and occupying at least a second plane different to but adjacent the first plane.
In particular, Figs 1A and 1 B illustrate an apparatus 1 comprising an external conductive housing element 12 that houses an antenna 2. In this example, the housing element 12 forms a conductive structure that almost entirely surrounds a cavity 3 housing the internal antenna 2.
The conductive housing element 12 comprises a slot 14 that facilitates the transfer of electromagnetic waves between the exterior of the housing 12 and the antenna 2. The slot 14 is defined by the absence of conductive material in the region of the slot 14. The slot 14 may be an open aperture to the interior cavity 3 or it may be covered by a dielectric that is permeable to electromagnetic radiation such as plastic (other examples are ceramic and ferrite material). In one embodiment, the slot 14 may be engraved on a metal foil covering a plastic substrate.
The slot 14 has a width W defined as the separation between opposing first and second terminating long edges 21 , 23 of the housing 12. The width W may be constant for the length of the slot or vary along the length of the slot 14. The slot 14 has a length L defined as the separation between opposing first and second terminating short edges 22, 24 of the housing 12.
In the example illustrated in Figs 1A and 1 B, the slot is a region lying within a slot plane 16 and the housing element 12 provides a conductive structure that extends in the slot plane 16. At least a portion of the antenna 2 extends in an antenna plane 6, that is adjacent and parallel to (but separate from) the slot plane 16. The antenna 2 does not extend into the slot plane 16.
The position of the antenna 2 relative to the slot 14 is such that it achieves very good or optimal coupling between the antenna 2 and the slotted housing 12.
The antenna 2 and the conductive housing element 12 are galvanically isolated such that there is no dc current path between them. They are, however, arranged for electromagnetic coupling and together form an antenna arrangement 10.
The antenna 2 has a resonant frequency F and the slot 14 is dimensioned to have an electrical length L' that corresponds to one or more multiples of one quarter of the resonant wavelength corresponding to the first resonant frequency F.
L' = nλ /4
where n is a natural number, L' is the electrical length of the slot 14 and λ is the resonant wavelength.
The dimensions of the slot result in the housing 12 parasitically resonating with the antenna 2. This results in the characteristics of the antenna arrangement 10 such as bandwidth, efficiency etc being different to that of the antenna 2. The antenna 2 operates as a feed to the antenna arrangement 10.
In the absence of a dielectric covering the slot 14, the electrical length L' may be the same as the physical length L of the slot.
The characteristics of the resonance of the antenna arrangement 10 may be engineered by varying the physical and/or electrical characteristics of the slot 14. Variations in the physical dimensions of the slot typically affect its associated electrical characteristics such as its electrical length and Q-factor which affect the antenna arrangement's resonant frequency and bandwidth respectively.
For example, varying the physical length L of the slot 14 varies its electrical length.
Varying the physical position of the slot 14 may affect its electrical characteristics. In Fig 1 , the slot 14 terminates on an edge 18 of the housing 12, whereas in the examples illustrated in Figs 2 and 3 the slot 14 does not terminate at an edge of the housing but is wholly contained within a face 13 of the housing 12.
Increasing the inductance associated with the slot 14 increases the slot's electrical length (which decreases the resonant frequency) and may decrease bandwidth. The electrical length may, for example, be increased by increasing the physical length of the slot. One option is to form the slot from one or more curved sections and another option is to meander the slot 14 as illustrated in Fig 2 (instead of using a straight slot 14 as in Figs 1 and 3). Increasing the capacitance associated with the slot by, for example, decreasing the slot's width as illustrated in Fig 3 (instead of having a constant width W as in Figs 1 and 2) decreases the slot's electrical length (increasing the resonant frequency) and may increase bandwidth.
The electrical characteristics of the slot 14 may be engineered using lumped electrical components as an addition or as an alternative to changing the physical characteristic of the slot 14. Fig 4 illustrates a slot 14 that has an electrical circuit 7 connected across the slot 14. The electrical component 7 may comprise one or more lumped components.
The electrical characteristics of the antenna arrangement 10 can also be modified by attaching a matching circuit 8 to the antenna 2.
The antenna arrangement is able to operate as a receiver and/or a transmitter at one or more of a large number of frequency bands including the following frequency bands: Bluetooth (2400-2483.5 MHz); WLAN (2400-2483.5 MHz); HLAN (5150-5850 MHz); GPS (1570.42-1580.42 MHz); US-GSM 850 (824-894 MHz); EGSM 900 (880- 960 MHz); EU-WCDMA 900 (880-960 MHz); PCN/DCS 1800 (1710-1880 MHz); US- WCDMA 1900 (1850-1990 MHz); WCDMA 2100 (Tx: 1920-1980 MHz Rx: 2110- 2180 MHz); PCS1900 (1850-1990 MHz); UWB Lower (3100-4900 MHz); UWB Upper (6000-10600 MHz); DVB-H (470-702 MHz); DVB-H US (1670-1675 MHz); Wi Max (2300-2400 MHz, 2305-2360 MHz, 2496-2690 MHz, 3300-3400 MHz, 3400-3800 MHz, 5250-5875 MHz);
RFID UHF (433 MHz, 865-956 MHz, 2450 MHz).
In one particular embodiment schematically illustrated in Figs 1A and 1 B, the apparatus is a mobile cellular telephone, the antenna 2 is a chip dielectric (ceramic) monopole feeding antenna and operates at the 2.45 GHz WLAN band. It has dimensions of 9 mm x 3 mm x 2 mm (length, width, height) and is mounted on a piece of copper-free PWB 8 of size 9.75 mm x 7 mm. The length of the antenna 2 is orthogonal and transverse to the length of the slot 14. The distance between the antenna 2 and slot 14 is 1.1 mm
The housing 12 provides a homogenous, metallic cover for the apparatus. The physical slot length L is about % of the wavelength at 2.45 GHz. The slot 14 has a constant width W of 2.4 mm and a length L of 25 mm i.e. L> 10*W. The slot 14 terminates, as in Fig s 1A and 1 B, at an edge of the housing 12. The slot 14 may be integrated into ventilation grates of the housing 12. The slot 14 may be covered with a plastic strip.
Although embodiments of the present invention have been described in the preceding paragraphs with reference to various examples, it should be appreciated that modifications to the examples given can be made without departing from the scope of the invention as claimed.
Whilst endeavoring in the foregoing specification to draw attention to those features of the invention believed to be of particular importance it should be understood that the Applicant claims protection in respect of any patentable feature or combination of features hereinbefore referred to and/or shown in the drawings whether or not particular emphasis has been placed thereon.
I/we claim:

Claims

1. An antenna arrangement comprising: an antenna occupying at least a first plane; a conductive structure that is isolated from the antenna but is arranged to be parasitically fed by the antenna, the conductive structure having a slot and occupying at least a second plane different to but adjacent the first plane.
2. An antenna arrangement as claimed in claim 1 , wherein the conductive structure is part of a housing for the antenna arrangement.
3. An antenna arrangement as claimed in claim 2, wherein the housing is a housing for an apparatus and the antenna is an internal antenna located inside the housing.
4. An antenna arrangement as claimed in claim 2 or 3, wherein the housing comprises an edge and the slot terminates at the edge.
5. An antenna arrangement as claimed in any one of claims 2 to 4, wherein the housing has a face bounded by edges and the slot is positioned wholly within the face.
6. An antenna arrangement as claimed in any preceding claim, wherein the antenna has a first resonant frequency and the slot is dimensioned to have an electrical length that corresponds to one or more multiples of one quarter of the resonant wavelength corresponding to the first resonant frequency
7. An antenna arrangement as claimed in any preceding claim wherein the slot has a minimum width and a length and the length is at least ten times greater than the minimum width.
8. An antenna arrangement as claimed in any preceding claim, wherein the slot has a constant width.
9. An antenna arrangement as claimed in any one of claims 1 to 7, wherein the slot has a variable width.
10. An antenna arrangement as claimed in any preceding claim, wherein the slot is straight.
11. An antenna arrangement as claimed in any one of claims 1 to 9, wherein the slot meanders.
12. An antenna arrangement as claimed in any one of claims 1 to 9, wherein the slot comprises one or more curved sections.
13. An antenna arrangement as claimed in any preceding claim, comprising an electric circuit connected across the slot.
14. An antenna arrangement as claimed in claim 13, wherein the impedance of the electrical circuit tunes a resonant frequency of the antenna arrangement to a first resonant frequency.
15. An antenna arrangement as claimed in claim 13 or 14, wherein the electric circuit comprises a single component.
16. An antenna arrangement as claimed in any preceding claim, wherein a plastic housing comprises a metallic covering and the slot is defined by an absence of the metallic covering.
17. An antenna arrangement as claimed in any preceding claim, further comprising a matching circuit connected to the antenna.
18. An antenna arrangement as claimed in any preceding claim, wherein the antenna is a chip dielectric feeding antenna.
19. An apparatus comprising a housing, with exterior metallization, that defines an interior cavity and an antenna arrangement as claimed in any preceding claim, positioned within the cavity, wherein the exterior metallization provides the conductive structure and the slot provides an electromagnetic aperture to the interior cavity.
20. An apparatus as claimed in claim 18, wherein the slot is covered with a dielectric.
21. An apparatus comprising a conductive housing that defines an interior cavity, an opening in the conductive housing, and an antenna positioned within the cavity adjacent the opening.
22. An apparatus as claimed in claim 21 , wherein, in operation, the antenna feeds the conductive housing which operates as a resonator.
23. An apparatus as claimed in claim 21 or 22, wherein the antenna has a first resonant frequency and the opening has an electrical dimension corresponding to a resonance at the first resonant frequency.
24. An apparatus as claimed in claim 21 , 22 or 23, wherein the conductive housing comprises a dielectric substrate and an exterior metallization.
25. An apparatus as claimed in claim 21 , 22, 23 or 24 wherein no conductive element or elements intervene between the antenna and the slot.
26. An antenna arrangement comprising: an antenna having a first resonant wavelength λ; a conductive housing that is isolated from the antenna but is indirectly fed by the antenna, the conductive housing having a slot that has an electrical length that corresponds to a multiple of λ/4.
27.A method comprising: directly feeding an antenna occupying at least a first plane; and using the antenna to indirectly feed a slotted conductive structure that is isolated from the antenna and occupies at least a second plane different to but adjacent the first plane.
PCT/IB2007/002217 2007-04-10 2007-04-10 An antenna arrangement and antenna housing WO2008122831A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB1000230.1A GB2463421B (en) 2007-04-10 2007-04-10 Antenna arrangement with a slot in a conductive housing which is parasitically fed
EP07789596A EP2165385A4 (en) 2007-04-10 2007-04-10 An antenna arrangement and antenna housing
CN200780052530.9A CN101641826B (en) 2007-04-10 2007-04-10 An antenna arrangement and antenna housing
KR1020097021041A KR101283070B1 (en) 2007-04-10 2007-04-10 An antenna arrangement and antenna housing
DE202007019033U DE202007019033U1 (en) 2007-04-10 2007-04-10 Antenna arrangement and device with an antenna arrangement
CA2693560A CA2693560C (en) 2007-04-10 2007-04-10 An antenna arrangement and antenna housing
PCT/IB2007/002217 WO2008122831A1 (en) 2007-04-10 2007-04-10 An antenna arrangement and antenna housing
US12/595,056 US8432321B2 (en) 2007-04-10 2007-04-10 Antenna arrangement and antenna housing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2007/002217 WO2008122831A1 (en) 2007-04-10 2007-04-10 An antenna arrangement and antenna housing

Publications (1)

Publication Number Publication Date
WO2008122831A1 true WO2008122831A1 (en) 2008-10-16

Family

ID=39830511

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/002217 WO2008122831A1 (en) 2007-04-10 2007-04-10 An antenna arrangement and antenna housing

Country Status (8)

Country Link
US (1) US8432321B2 (en)
EP (1) EP2165385A4 (en)
KR (1) KR101283070B1 (en)
CN (1) CN101641826B (en)
CA (1) CA2693560C (en)
DE (1) DE202007019033U1 (en)
GB (1) GB2463421B (en)
WO (1) WO2008122831A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011076582A1 (en) 2009-12-21 2011-06-30 Lite-On Mobile Oyj An antenna arrangement
DE102011114736A1 (en) 2011-03-18 2012-09-20 Hörmann KG Antriebstechnik Loading dock for docking transport vehicle to building, has metallic plate provided with radio frequency identification reception and/or transmission unit provided at signal pass band that transmits radio frequency identification signals
WO2012126862A1 (en) 2011-03-18 2012-09-27 Hörmann KG Antriebstechnik Building access apparatus and component therefor
CN102971751A (en) * 2010-02-11 2013-03-13 声音工艺公司 Ruggedized radio frequency idenfification tag
WO2013048737A1 (en) * 2011-09-30 2013-04-04 Google Inc. Antennas for computers with conductive chassis
WO2013107921A1 (en) * 2012-01-19 2013-07-25 Amphenol Finland Oy Antenna structure for mobile device
EP2854214A1 (en) * 2013-09-27 2015-04-01 Thomson Licensing Antenna assembly for electronic device
WO2019008813A1 (en) * 2017-07-07 2019-01-10 スター精密株式会社 Beacon device and beacon transmission/reception system

Families Citing this family (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102915462B (en) * 2007-07-18 2017-03-01 株式会社村田制作所 Wireless IC device
US7697281B2 (en) 2008-09-05 2010-04-13 Apple Inc. Handheld computing device
US9774072B2 (en) 2009-10-09 2017-09-26 Htc Corporation Housing, handheld device, and manufacturing method of housing
US8711044B2 (en) * 2009-11-12 2014-04-29 Nokia Corporation Antenna arrangement and antenna housing
US9602914B2 (en) 2010-08-27 2017-03-21 Apple Inc. Porting audio using a connector in a small form factor electronic device
US8515113B2 (en) 2010-08-19 2013-08-20 Apple Inc. Composite microphone boot to optimize sealing and mechanical properties
US8391010B2 (en) 2010-08-19 2013-03-05 Apple Inc. Internal frame optimized for stiffness and heat transfer
US8427379B2 (en) 2010-08-19 2013-04-23 Apple Inc. Modular material antenna assembly
US8477492B2 (en) 2010-08-19 2013-07-02 Apple Inc. Formed PCB
US8634204B2 (en) 2010-08-19 2014-01-21 Apple Inc. Compact folded configuration for integrated circuit packaging
US8542155B2 (en) * 2011-07-29 2013-09-24 Brady Worldwide, Inc. Wireless communications device and housing for a wireless communications device
US9287627B2 (en) 2011-08-31 2016-03-15 Apple Inc. Customizable antenna feed structure
US8941550B2 (en) * 2011-09-09 2015-01-27 Blackberry Limited Mobile wireless communications device including a slot antenna and related methods
US9406999B2 (en) 2011-09-23 2016-08-02 Apple Inc. Methods for manufacturing customized antenna structures
CN103918124A (en) * 2011-11-17 2014-07-09 索尼公司 Electronic device
KR101916241B1 (en) * 2012-03-12 2018-11-07 삼성전자주식회사 Antenna apparatus for portable terminal
US10361480B2 (en) * 2012-03-13 2019-07-23 Microsoft Technology Licensing, Llc Antenna isolation using a tuned groundplane notch
GB2500209B (en) * 2012-03-13 2016-05-18 Microsoft Technology Licensing Llc Antenna isolation using a tuned ground plane notch
KR101928933B1 (en) 2012-03-29 2018-12-14 삼성전자 주식회사 Antenna device of mobile terminal
EP2877659A4 (en) * 2012-07-25 2016-04-13 Master Lock Co Integrated antenna coil in a metallic body
US8884835B2 (en) 2012-08-09 2014-11-11 Intel Mobile Communications GmbH Antenna system, method and mobile communication device
US10027025B2 (en) 2012-08-29 2018-07-17 Htc Corporation Mobile device and antenna structure therein
US10003121B2 (en) 2012-08-29 2018-06-19 Htc Corporation Mobile device and antenna structure
WO2014038209A1 (en) 2012-09-06 2014-03-13 パナソニック株式会社 Antenna device and communications device
US9716307B2 (en) 2012-11-08 2017-07-25 Htc Corporation Mobile device and antenna structure
CN102983875B (en) * 2012-11-29 2015-06-10 中兴通讯股份有限公司 Method and equipment for reducing interference to sensitivity of data card antenna
WO2014128339A1 (en) * 2013-02-22 2014-08-28 Nokia Corporation Apparatus and methods for wireless coupling
US9655261B2 (en) 2013-03-21 2017-05-16 Htc Corporation Casing of electronic device and method of manufacturing the same
GB2516305A (en) * 2013-07-19 2015-01-21 Nokia Corp Apparatus and methods for wireless communication
DE102013219875B4 (en) 2013-10-01 2019-10-17 Fried. Dick Gmbh & Co. Kg Knife with an RFID transponder arranged on the Erl
US9203141B1 (en) 2014-06-11 2015-12-01 King Slide Technology Co., Ltd. Communication device and antenna thereof
GB2529884B (en) * 2014-09-05 2017-09-13 Smart Antenna Tech Ltd Reconfigurable multi-band antenna with independent control
WO2016034900A1 (en) 2014-09-05 2016-03-10 Smart Antenna Technologies Ltd Reconfigurable multi-band antenna with four to ten ports
US10027020B2 (en) 2014-10-10 2018-07-17 AQ Corporation Near field communication antenna and smartphone having antenna
CN105530785B (en) * 2014-12-26 2016-11-23 比亚迪股份有限公司 A kind of electronic product metal shell being formed with antenna slot and preparation method thereof
CN105530791B (en) * 2014-12-26 2016-10-12 比亚迪股份有限公司 A kind of electronic product metal shell being formed with antenna slot and preparation method thereof
US9666934B2 (en) * 2015-04-08 2017-05-30 Motorola Mobility Llc Antenna link in ultra-thin device with single-piece metal housing
US9559412B2 (en) 2015-05-18 2017-01-31 Nokia Technologies Oy Wireless portable electronic device having a conductive body that functions as a radiator
TWI599099B (en) * 2015-07-03 2017-09-11 宏碁股份有限公司 Mobile device
TWI580109B (en) * 2015-12-01 2017-04-21 廣達電腦股份有限公司 Mobile device
US10003120B2 (en) 2016-09-02 2018-06-19 AQ Corporation Smartphone antenna in flexible PCB
USD850424S1 (en) 2016-12-14 2019-06-04 AQ Corporation Flexible PCB dual antenna module for use in smartphone
US10547112B2 (en) 2016-09-02 2020-01-28 AQ Corporation Smartphone antenna in flexible PCB
US10074891B2 (en) 2016-09-02 2018-09-11 AQ Corporation Smartphone antenna in flexible PCB
CN113571882B (en) * 2017-05-12 2023-02-03 华为技术有限公司 Communication equipment
BR112019023723A2 (en) 2017-05-12 2020-05-26 Huawei Technologies Co., Ltd. COMMUNICATION DEVICE
KR102396315B1 (en) * 2017-08-21 2022-05-10 삼성전자주식회사 Antenna device and electronic device including the same
CN108365323B (en) * 2018-02-05 2021-02-09 Oppo广东移动通信有限公司 Antenna module, middle frame module and electronic equipment
US11303011B2 (en) 2019-11-27 2022-04-12 AQ Corporation Smartphone antenna in flexible PCB
CN113064498B (en) * 2020-01-02 2023-08-22 华为技术有限公司 Touch pen with antenna
CN113113764B (en) * 2020-01-13 2023-07-25 北京小米移动软件有限公司 Antenna and mobile terminal
CN111262006A (en) * 2020-01-19 2020-06-09 惠州Tcl移动通信有限公司 Antenna structure and terminal equipment adopting same
KR20220166587A (en) 2021-06-10 2022-12-19 삼성전자주식회사 An electronic device comprising an antenna

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6282433B1 (en) * 1999-04-14 2001-08-28 Ericsson Inc. Personal communication terminal with a slot antenna
US6424300B1 (en) * 2000-10-27 2002-07-23 Telefonaktiebolaget L.M. Ericsson Notch antennas and wireless communicators incorporating same
US6937196B2 (en) * 2003-01-15 2005-08-30 Filtronic Lk Oy Internal multiband antenna

Family Cites Families (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242685A (en) * 1979-04-27 1980-12-30 Ball Corporation Slotted cavity antenna
JPS6040205B2 (en) * 1980-12-18 1985-09-10 日本電信電話株式会社 radio antenna
US4733245A (en) 1986-06-23 1988-03-22 Ball Corporation Cavity-backed slot antenna
FI87409C (en) 1991-01-17 1992-12-28 Valtion Teknillinen Apparatus and method for coupling a micro-lamella circuit to a cavity resonator
US5661493A (en) 1994-12-02 1997-08-26 Spar Aerospace Limited Layered dual frequency antenna array
KR100355263B1 (en) * 1995-09-05 2002-12-31 가부시끼가이샤 히다치 세이사꾸쇼 Coaxial Resonant Slot Antenna, Manufacturing Method and Portable Wireless Terminal
JP3280204B2 (en) 1995-09-05 2002-04-30 株式会社日立製作所 Coaxial resonant slot antenna and method of manufacturing the same
SE511295C2 (en) 1997-04-30 1999-09-06 Moteco Ab Antenna for radio communication device
JP3739189B2 (en) * 1997-08-28 2006-01-25 新日本無線株式会社 Electromagnetic element antenna
US20010053677A1 (en) * 1999-01-20 2001-12-20 Jeffrey L. Schiffer Method and apparatus for integrating an intentional radiator in a system
AU7695300A (en) 1999-09-17 2001-04-17 Avantego Ab Antenna arrangement and a method for reducing size of a whip element in an antenna arrangement
US6512487B1 (en) * 2000-10-31 2003-01-28 Harris Corporation Wideband phased array antenna and associated methods
FI119861B (en) 2002-02-01 2009-04-15 Pulse Finland Oy level antenna
US6879293B2 (en) * 2002-02-25 2005-04-12 Tdk Corporation Antenna device and electric appliance using the same
US6624789B1 (en) 2002-04-11 2003-09-23 Nokia Corporation Method and system for improving isolation in radio-frequency antennas
JP3912754B2 (en) * 2003-01-08 2007-05-09 ソニー・エリクソン・モバイルコミュニケーションズ株式会社 Wireless device
JP4064834B2 (en) 2003-02-05 2008-03-19 株式会社日本自動車部品総合研究所 Slot antenna
US6927735B2 (en) * 2003-02-25 2005-08-09 Fuba Automotive Gmbh & Co. Kg Antenna arrangement in the aperture of an electrically conductive vehicle chassis
KR100741398B1 (en) 2003-05-12 2007-07-20 노키아 코포레이션 Open-ended slotted PIFA antenna and tuning method
JP2005167833A (en) * 2003-12-04 2005-06-23 Alps Electric Co Ltd Slot antenna
US7098854B2 (en) 2004-09-09 2006-08-29 Raytheon Company Reflect antenna
WO2006040609A1 (en) 2004-10-13 2006-04-20 Nokia Siemens Networks Asset Management Oy Half-and quarter-wavelength printed slot ultra-wideband (uwb) antennas for mobile terminals
US7176842B2 (en) * 2004-10-27 2007-02-13 Intel Corporation Dual band slot antenna
FI118749B (en) 2005-04-28 2008-02-29 Pulse Finland Oy Column Antenna
EP1858112B1 (en) * 2006-05-19 2010-07-07 AMC Centurion AB Metal housing with slot antenna for a radio communication device
US8441404B2 (en) * 2007-12-18 2013-05-14 Apple Inc. Feed networks for slot antennas in electronic devices
US20090153412A1 (en) * 2007-12-18 2009-06-18 Bing Chiang Antenna slot windows for electronic device
KR101501921B1 (en) * 2008-05-06 2015-03-13 삼성전자주식회사 antenna structure for potable terminal having metal case

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6282433B1 (en) * 1999-04-14 2001-08-28 Ericsson Inc. Personal communication terminal with a slot antenna
US6424300B1 (en) * 2000-10-27 2002-07-23 Telefonaktiebolaget L.M. Ericsson Notch antennas and wireless communicators incorporating same
US6937196B2 (en) * 2003-01-15 2005-08-30 Filtronic Lk Oy Internal multiband antenna

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011076582A1 (en) 2009-12-21 2011-06-30 Lite-On Mobile Oyj An antenna arrangement
CN102971751A (en) * 2010-02-11 2013-03-13 声音工艺公司 Ruggedized radio frequency idenfification tag
DE102011114736A1 (en) 2011-03-18 2012-09-20 Hörmann KG Antriebstechnik Loading dock for docking transport vehicle to building, has metallic plate provided with radio frequency identification reception and/or transmission unit provided at signal pass band that transmits radio frequency identification signals
WO2012126862A1 (en) 2011-03-18 2012-09-27 Hörmann KG Antriebstechnik Building access apparatus and component therefor
WO2013048737A1 (en) * 2011-09-30 2013-04-04 Google Inc. Antennas for computers with conductive chassis
US8779999B2 (en) 2011-09-30 2014-07-15 Google Inc. Antennas for computers with conductive chassis
US9882264B2 (en) 2011-09-30 2018-01-30 Google Llc Antennas for computers with conductive chassis
WO2013107921A1 (en) * 2012-01-19 2013-07-25 Amphenol Finland Oy Antenna structure for mobile device
EP2854214A1 (en) * 2013-09-27 2015-04-01 Thomson Licensing Antenna assembly for electronic device
CN104518280A (en) * 2013-09-27 2015-04-15 汤姆逊许可公司 Antenna assembly for electronic device
US9735461B2 (en) 2013-09-27 2017-08-15 Thomson Licensing Antenna assembly for electronic device
WO2019008813A1 (en) * 2017-07-07 2019-01-10 スター精密株式会社 Beacon device and beacon transmission/reception system

Also Published As

Publication number Publication date
GB2463421A (en) 2010-03-17
US8432321B2 (en) 2013-04-30
EP2165385A4 (en) 2013-01-23
EP2165385A1 (en) 2010-03-24
DE202007019033U1 (en) 2010-04-22
CA2693560C (en) 2013-09-24
US20100073247A1 (en) 2010-03-25
CN101641826A (en) 2010-02-03
CA2693560A1 (en) 2008-10-16
CN101641826B (en) 2014-06-25
KR101283070B1 (en) 2013-07-05
GB2463421B (en) 2012-02-22
KR20100005071A (en) 2010-01-13
GB201000230D0 (en) 2010-02-24

Similar Documents

Publication Publication Date Title
US8432321B2 (en) Antenna arrangement and antenna housing
US8711044B2 (en) Antenna arrangement and antenna housing
EP2160796B1 (en) An antenna arrangement
US7876273B2 (en) Apparatus and method
KR100964652B1 (en) Multi-band antenna and wireless communication device including the same
US9246210B2 (en) Antenna with cover radiator and methods
EP2223381B1 (en) Apparatus and methods for wireless communication
EP1870956B1 (en) Mobile terminal using an internal antenna with a conductive layer
KR100856310B1 (en) Mobile-communication terminal
EP2198478B1 (en) An antenna arrangement, a method for manufacturing an antenna arrangement and a printed wiring board for use in an antenna arrangement
US20090015490A1 (en) Electronic device and method for manufacturing same
CN110854509B (en) Apparatus for wireless communication
US8378900B2 (en) Antenna arrangement
US8362957B2 (en) Radiation pattern control
WO2015011468A1 (en) Multi-band antennas using loops or notches
WO2013044434A1 (en) An antenna apparatus and a method
KR20070021947A (en) An antenna arrangement for a cellular communication terminal
EP2625743B1 (en) Antenna apparatus and methods
US9755315B2 (en) Antenna arrangement
GB2402265A (en) Tuneable antenna

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200780052530.9

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07789596

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 6284/DELNP/2009

Country of ref document: IN

ENP Entry into the national phase

Ref document number: 20097021041

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2007789596

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2007789596

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 12595056

Country of ref document: US

ENP Entry into the national phase

Ref document number: 1000230

Country of ref document: GB

Kind code of ref document: A

Free format text: PCT FILING DATE = 20070410

WWE Wipo information: entry into national phase

Ref document number: 1000230.1

Country of ref document: GB

WWE Wipo information: entry into national phase

Ref document number: 2693560

Country of ref document: CA