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EP2001080B1 - Antenne und Herstellungsverfahren dafür - Google Patents

Antenne und Herstellungsverfahren dafür Download PDF

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Publication number
EP2001080B1
EP2001080B1 EP07252019.0A EP07252019A EP2001080B1 EP 2001080 B1 EP2001080 B1 EP 2001080B1 EP 07252019 A EP07252019 A EP 07252019A EP 2001080 B1 EP2001080 B1 EP 2001080B1
Authority
EP
European Patent Office
Prior art keywords
antenna
ground plane
substrate
ground
radiating element
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.)
Active
Application number
EP07252019.0A
Other languages
English (en)
French (fr)
Other versions
EP2001080A1 (de
Inventor
Orhan Coskun
Ayse Sevinç Aydinlik Bechteler
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.)
Vestel Elektronik Sanayi ve Ticaret AS
Original Assignee
Vestel Elektronik Sanayi ve Ticaret AS
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.)
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Publication date
Application filed by Vestel Elektronik Sanayi ve Ticaret AS filed Critical Vestel Elektronik Sanayi ve Ticaret AS
Priority to EP07252019.0A priority Critical patent/EP2001080B1/de
Publication of EP2001080A1 publication Critical patent/EP2001080A1/de
Application granted granted Critical
Publication of EP2001080B1 publication Critical patent/EP2001080B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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 present invention relates to an antenna and to a method of manufacturing an antenna.
  • Wireless communication networks have served our communication needs well for over a century and are becoming increasingly prevalent in keeping people connected in metropolitan, wide, local and personal area networks.
  • WiFi systems wireless LANs based on the IEEE 802.11 specifications
  • 1 Mb/s connection speed in the physical layer with a throughput of less than 0.5 Mb/s when they were first introduced.
  • they are able to provide more than 200 Mb/s connection speed, with a throughput of 100 Mb/s or more.
  • Driving this increase in speed are applications such as video conferencing, video streaming, multi-media content distribution, on-line training materials, cluster computing and data mining systems.
  • the electrical performance of the antennas is strongly influenced by the environment in which it is required to operate.
  • the antenna may be mounted close to the housing of the communication device or to various other parts of the communication device, leading to the reflection of electromagnetic waves radiated by the antenna and consequentially to distortion of the radiation pattern in free space of the antenna, all of which negatively impacts the performance of the antenna.
  • known antennas are becoming inadequate for the task.
  • FIGs 1A and 1B show a typical prior art antenna 100 used in a wireless communication system, viewed from the front and from the rear respectively.
  • the antenna 100 comprises a substrate 101 of a thickness of about 0.3 mm.
  • a metallic radiating element 102 and ground plane 103 are positioned on the front side of the substrate 101.
  • a cable 104 is attached to the rear side of the substrate 101, by which signals are fed to and/or received from the antenna 100.
  • WO-A-2005/048404 discloses an antenna having a radiating element and ground plane on one side of a substrate and a second ground plane connected to the first ground plane on the reverse side of the substrate.
  • an antenna comprising: a substrate having a first and a second opposed side; a single element for radiating electromagnetic waves, wherein the radiating element is formed on the first substrate side; a first ground plane formed on the first substrate side, the first ground plane being electrically connected to the radiating element; and, a second ground plane formed on the second substrate side, the second ground plane being electrically connected to the first ground plane, characterised in that the substrate is at least 1 mm thick.
  • the antenna has ground planes on both sides on the substrate, the antenna is very flexible.
  • the antenna can be mounted with either side to the housing of a communication device, e.g. to the system ground chassis of a television set.
  • the antenna is capable of being implemented in a variety of environments in a communication system whilst giving satisfactory electrical performance. This increases the flexibility of the antenna in how the antenna can be incorporated into a communication device, helping avoid the need to redesign an antenna to perform satisfactorily according to the communication device in which the antenna is employed. This is particularly useful in a mass production environment.
  • the preferred embodiment is applicable to a variety of wireless communication systems, for example computer-to-computer or computer-to-television communications.
  • one or more of the radiating element, the first ground plane and the second ground plane is a metal layer on the surface of the substrate. This allows for simple manufacture using standard “printing” or “etching” techniques known in the art.
  • the first ground plane at least partially overlies the second ground plane.
  • the first ground plane substantially fully overlies the second ground plane. This improves the electrical performance of the antenna.
  • At least one of the first and second ground planes has a height of substantially ⁇ / 2, wherein ⁇ is the wavelength of a electromagnetic wave at the resonant frequency of the antenna.
  • the first and second ground planes are connected by at least one via.
  • Vias offer a simple way of making connection between the two ground planes, allowing known circuit board manufacturing techniques to be used in making the antenna. This helps allow the antenna to be mass manufactured simply and at relatively low cost.
  • the radiating element may be an inverted-F shape.
  • the substrate is at least 3 mm thick.
  • the preferred thick substrate between the ground planes helps improve the electrical performance of the antenna when mounted close to reflective structures such as the housing of a communication device in which it is employed.
  • an electromagnetic wave processing apparatus and an antenna as described above, the antenna being arranged to transmit and/or receive the electromagnetic wave and the processing apparatus being arranged to process the electromagnetic wave.
  • the apparatus has an electrically insulating outer housing and an electrically conducting inner chassis, and the antenna is mounted to said inner chassis.
  • the antenna can be mounted with either side facing the housing in this embodiment, with little effect on the electrical performance of the antenna. This makes the antenna more flexible in the how it can be positioned in or on the apparatus.
  • the apparatus has an electrically insulating housing, and the antenna is mounted to said housing such that the second substrate side faces the housing. This allows the radiating element of the antenna to be separated from the housing by the thickness of the substrate, whilst having a ground plane against the housing. This helps reduce the influence of the housing on the performance of the antenna.
  • the apparatus has an electrically insulating housing, the housing having an inwardly protruding boss, wherein the antenna is mounted to said boss. This allows the antenna to be mounted at a desired distance from the housing, helping reduce reflection from the housing.
  • At least one of the first and second ground planes of the antenna are electrically connected to a ground of the apparatus. This has the effect of increasing the ground plane of the antenna beyond the extent of the ground planes formed on the substrate. In environments with a very limited space, by electrically connecting either ground plane of the antenna to the system ground this allows the ground plane area of the antenna and therefore the total size of the antenna to be kept small.
  • the combination provides a television set. In other embodiments, the combination provides a wireless communication system.
  • a method of manufacturing an antenna comprising: forming on a first surface of a substrate an element for radiating electromagnetic waves and a first ground plane, the first ground plane being electrically connected to the radiating element; forming on a second surface of the substrate a second ground plane, the second ground plane being electrically connected to the first ground plane, wherein the second surface of the substrate is opposed to the first surface of the substrate and wherein said radiating element is the only radiating element formed on the substrate, characterised in that the substrate is at least 1 mm thick.
  • At least one of said radiating element, said first ground plane and said second ground plane is formed by patterning a metal deposited on the substrate.
  • FIG. 2 shows a block diagram of a wireless multimedia communication system 1.
  • the communication system 1 comprises a first and second communication device 2.
  • Each communication device 2 has a multimedia processor 3 which generally handles top level functionality in the communication device 2, for example processing and presenting the multimedia information to the user.
  • the multimedia processor 3 passes multimedia information to a baseband processor 4 which converts data to a form suitable for the wireless communication channel. This data is passed to an analogue/radio frequency front end 5 that is arranged to drive an antenna 10, thereby propagating the information as electromagnetic waves through space.
  • a similar process is carried out in reverse when the communication device 2 acts as a receiver.
  • FIG 3 shows an example of the plan of a house 6 in which a wireless communication system 1 such as the one shown in Figure 2 is implemented.
  • Communication devices 2 which may be for instance computers or home entertainment equipment, are positioned at various positions in the plan 6.
  • the communication devices 2 can be stationary or mobile, or can vary between being stationary and mobile.
  • a typical application may be a wireless LAN implemented between a computer and one or more television sets, to allow content obtained by the computer to be sent to the television set for display.
  • the links of a communication system 1 it is generally desirable for the links of a communication system 1 to have a transfer rate that is as high as possible at all times. Since the location of each communication device 2 is a priori not known when the communication devices 2 are manufactured, and since a communication device 2 may be mobile, in which case the location of a communication device 2 may change with time, the antennas 10 of the communication devices 2 should ideally show an omni-directional radiation pattern. By aligning the phase between antennas 10, directional gain may be achieved. By combining the received signals on each antenna 10 in suitable way, for example using maximum ratio combining, a system may be provided that is more robust against fading.
  • FIGs 4A, 4B and 4C show an example of an antenna 10 according to one embodiment of the present invention viewed from the front, top and side ( Figure 4A ), from the front ( Figure 4B ), and from the rear ( Figure 4C ).
  • the antenna 10 comprises a substrate 11 made from a material which has low electrical losses at the frequency range at which the antenna 10 is intended to operate.
  • the substrate 11 has a thickness 14 which may be selected according to the application of the antenna 10.
  • the thickness 14 of the substrate 11 is generally expected to be at least 1 mm and up to several mm. A thickness 14 of about 1.5 mm may be generally preferred.
  • the antenna 10 in this example is an inverted-F antenna.
  • a radiating element 15 in the shape of an inverted-F is located on the front side 12 of the substrate 11, made from an electrically conducting metal such as, for example, copper.
  • the radiating element 15 has a feed point 17 to which a driving signal is fed to the antenna 10 to be radiated into space.
  • the driving signal may be supplied via a coaxial cable or other suitable cable attached to the feed point 17 of the antenna 10 (shown by Figures 6A, 6B , 7A and 7B and described further below).
  • the radiating element 15 has a shorted foot portion 16, which is contiguous with or otherwise connected to a first ground plane 18 also located on the front side 12 of the substrate 11.
  • the first ground plane 18 is also made of a conducting metal such as, for example, copper.
  • a second ground plane 19 is located on the rear side 13 of the substrate 11.
  • the second ground plane 19 is also made of a conducting metal such as, for example, copper.
  • the first and second ground planes 18,19 have substantially the same footprint on the opposed front and rear sides 12,13 of the substrate 11, i.e. they substantially fully overlie each other.
  • the ground planes 18,19 have a height h 22.
  • the height h 22 of the ground planes 18,19 can be selected according to the application of the antenna 10 as discussed further below.
  • the antenna 10 may be manufactured by a standard "printing" technique as known in the art. For example, metal may be deposited on both sides 12,13 of a substrate 11. A wet-etching process may then be used to form or "pattern" the radiating element 15 and ground planes 18,19 by removing portions of the metal. This makes the antenna 10 particularly suitable for mass production. Nonetheless, other suitable ways of manufacturing the antenna 10 may be used.
  • the front and rear ground planes 18,19 located on the front and rear sides 12,13 of the substrate 11 are connected to each other by a plurality of vias 20 spaced across the extent of the ground planes 18,19.
  • the distance d 21 between the vias 20 is selected in accordance with the frequency f at which the antenna 10 is intended to operate.
  • a mounting hole 23 is provided through the antenna 10, extending through both ground planes 18,19 and the substrate 11, allowing the antenna 10 to be mounted to a convenient attachment point of a communication device 2.
  • the mounting hole 23 can be located anywhere within the area of the ground planes 18,19 as convenient to allow the antenna 10 to be mounted.
  • Figure 5A shows a graph measuring the reflection coefficient of the antenna 10 against signal frequency, as determined by a simulation of the performance of the antenna 10.
  • the simulation may be made by, for example, a suitable computer application.
  • a proportion of the input signal energy may be reflected back from the antenna 10, rather than being transferred to the antenna 10 and then radiated into space.
  • the reflection coefficient gives a measure of the proportion of power that is reflected by the antenna 10 and thus gives an indication as to the performance of the antenna 10.
  • the antenna 10 has a low reflection coefficient, at least over the frequency range of interest, so that the performance of the antenna 10 is acceptably efficient.
  • a generally recognised "rule-of-thumb" in the field of antenna manufacturing is that a reflection coefficient of no more than about -10 dB throughout the frequency band of interest is sufficient to give acceptable operation of the antenna 10. This means that no more than 10% of the power of the input signal fed to the antenna 10 is reflected back in the transmission line, rather than being transferred to the antenna 10 and then radiated into space.
  • the antenna 10 of the present example is arranged to operate in the ISM frequency band, i.e. over a frequency range of 2.4 to 2.5 GHz. Accordingly, the antenna 10 is arranged to resonate at the centre frequency in this range, i.e. 2.45 GHz, by for example sizing and shaping the radiating element 15 to resonate at this frequency.
  • the reflection coefficient of the antenna 10 has its minimum value at an input signal frequency of 2.45 GHz. The minimum value may be as low as -50 dB at this point. Within the frequency band of 2.4 to 2.5 GHz, the reflection coefficient is lower than -10 dB throughout the frequency band.
  • Figure 5B shows the simulated radiation pattern of the same antenna 10.
  • the radiation pattern shows nearly omni-directional behaviour as required in many wireless communication systems 1.
  • the simulated results of the antenna 10 are substantially similar to those that would be achieved by a prior art inverted-F antenna.
  • Examples of prior art arrangements of inverted-F antennas include an antenna with a single radiating element and a single ground plane located on one side of the substrate (as shown in Figures 1A and 1B for example), and an antenna with a radiating element and a ground plane each located on both sides of the substrate.
  • the environment in which an antenna 10 is employed has a significant influence in practice on the performance of that antenna 10.
  • environmental factors include the proximity of the antenna 10 to interfering structures, such as the housing of the communication device 2, and electrical losses in the various conductors or substrate 11.
  • the present antenna 10 advantageously shows more consistent performance when employed in different communication devices 2, making the antenna 10 more versatile in comparison with other prior art antennas.
  • FIGs 6A and 6B show two examples of the present antenna 10 mounted inside a communication device 2 for use in a communication system 1 such as shown in Figure 2 .
  • the communication device 2 may be, for example, a television set or part of a wireless device for a computer, allowing computer-to-computer or computer-to-television communications such as the example shown in Figure 3 .
  • the communication device 2 has an electrically insulating outer housing 31. Typically this may be made from a plastics material. Inside the outer housing 31 is an electrically conducting inner chassis 32. Typically this may be made from a metal.
  • the antenna 10 is mounted to the inner chassis 32 by a screw 33 or other fastener driven through the mounting hole 23 of the antenna 10.
  • the antenna 10 is fed by a coaxial cable 34 or other cable attached to the feed point 17 of the antenna 10, by which a driving signal is fed to the antenna 10 from the analogue/radio frequency front end 5 (not shown in Figure 6A and 6B ) of the communication device 2.
  • the conducting inner chassis 32 acts as a ground for the system.
  • the ground planes 18,19 of the antenna 10 are electrically connected to the conducting inner chassis 32 and are thereby connected to the system ground. This has the advantage of extending the effective depth of the ground planes 18,19 of the antenna 10, allowing the ground planes 18,19 of the antenna 10 to be made smaller, and thus the antenna 10 to be made smaller.
  • the antenna 10 can be mounted with either the front or rear side 12,13 facing the housing 31, as shown in Figures 6A and 6B respectively, with no or very little degradation of the electrical performance of the antenna 10. This is useful, as the feed point 17 of the antenna 10 is fixed in being on the front side of the antenna 10, and the antenna 10 can be mounted according to how it is convenient for the antenna cable 34 to be routed.
  • Figure 6C shows the measured reflection coefficient of the antenna 10 mounted inside a communication device 2 as shown by Figure 6A or 6B .
  • the reflection coefficient is lower than -10 dB and shows the same results when the antenna 10 is mounted with either side 12,13 facing the housing 31. This shows the versatility of the present antenna 10.
  • FIGS 7A and 7B show two further examples of how the antenna 10 may be implemented inside a communication device 2.
  • the communication device 2 has an electrically insulating outer housing 31, for example made from a plastics material, to which the antenna 10 is mounted.
  • the communication device 2 does not have an electrically conducting inner chassis acting as a system ground.
  • the antenna 10 therefore provides its own ground solely by way of the ground planes 18,19. This means that the height h 22 of the ground planes 18,19 must be larger to achieve a satisfactory performance of the antenna 10.
  • the height h 22 selected for the ground planes 18,19 depends on the particular application of the antenna 10, and in particular on the frequency band at which it is intended to operate.
  • the height h 22 of the ground planes 18,19 is at least equal to half of the wave length of the frequency of interest.
  • the height h 22 can be made smaller than the preferred height h 22 than otherwise, for example half the height.
  • the housing 31 has an inwardly-extending boss 35 to which the antenna 10 is mounted via the mounting hole 23 and a screw 33 or other fastener. This positions the antenna 10 at a distance of about 10 mm millimetres to the housing 31. This reduces the influence of the housing 31 on the performance of the antenna 10.
  • the antenna 10 is mounted directly onto the housing 31.
  • the antenna 10 is mounted so that the radiating element 15 faces away from the housing 31.
  • a minimum distance is ensured between the radiating element 15 and the housing 31, namely the thickness 14 of the substrate 11.
  • the thickness 14 of the substrate 11 ensures that the distance between the radiating element 15 of the antenna 10 and housing 31 is large enough to minimize the electrical influence of the housing 31 on the performance of the antenna 10 over the particular frequency band of interest.
  • the antenna 10 also has a ground plane, i.e. the rear ground plane 19, adjacent the housing 31, which also helps improve the electrical performance of the antenna 10.
  • Figure 7C shows three cases of the measured reflection coefficient of the present antenna 10.
  • the antenna 10 is mounted on a boss 35 with a distance of 10 mm to the housing 31 of a television.
  • case B the antenna 10 is mounted directly on a housing 31 made of a certain plastic.
  • case C the antenna 10 is mounted directly on another housing 31 made of a plastic different from the plastic used in case B. It can be seen that the electrical influence of the two different plastic materials in case B and case C on the electrical performance of the antenna 10 is small. The reflection is no higher than -10 dB in both cases. Further performed wireless connection tests proved the low influence of the housing 31 due to the preferred thick substrate 11.
  • Figure 7D shows three examples of the measured reflection coefficient of a commercially available printed antenna, such as for example the antenna shown by Figures 1A and 1B , mounted under similar conditions as described above.
  • the antenna has a theoretical minimum reflection coefficient at 2.45 GHz, i.e. in the centre of the ISM band.
  • the antenna is mounted in air and shows a minimum reflection coefficient above 2.7 GHz.
  • the antenna is mounted on the housing of a television set and shows a minimum reflection coefficient at 2.51 GHz.
  • case F the antenna is mounted on FR4 substrate and shows a minimum reflection coefficient at 2.37 GHz.
  • the influence of the environment, and in particular the housing, on the electrical performance of the antenna is clearly seen.
  • the antenna is unable to achieve the desired standard of a reflection coefficient of no more than about -10 dB throughout the ISM frequency band.
  • the housing of such a device is often made of a plastics material.
  • the electrical properties of the plastics material may not be very well known.
  • the material from which the housing is made may be changed during the manufacturing lifetime of the product.
  • the electrical properties of the housing and the material from which it is made are often only known approximately, within a certain tolerance, and not very precisely. Any of these factors may mean that a commercially available antenna may not perform adequately when employed in a particular communication device, or may become not suitable during the manufacturing lifetime of the product as the specifications of that device change.
  • the typical commercially available antenna often has to be redesigned according to the specific environment presented by the communication device 2 in which it is to be employed, in order that the performance of the antenna is acceptable in that environment.
  • the present antenna 10 is capable of being used within a wider range of environments without the need of being redesigned. This is advantageous where the antennas 10 and the communication devices 2 in which they are employed are being mass produced, since it is more time and cost effective.
  • a further advantage of the present antenna 10 is the mechanical stability it offers due to the preferred thick substrate 11.
  • the antenna 10 can withstand higher mechanical stresses when mounted during the manufacturing process of the whole communication device 2, and when used in harsh environmental conditions.
  • antenna types other than an inverted-F antenna may be used.
  • the inverted-F antenna is presently popular in communication systems that operate over the ISM band and in small devices generally. Nonetheless, many suitable types of antennas may be used: for example, a printed broadband monopole antenna may be used, or other printed antenna types. Similarly, other frequency bands may be used.

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Claims (24)

  1. Antenne (10), wobei die Antenne (10) Folgendes beinhaltet:
    einen Träger (11), der eine erste und eine zweite entgegengesetzte Seite (12,13) aufweist;
    ein einzelnes Element (15) zum Ausstrahlen von elektromagnetischen Wellen, wobei das ausstrahlende Element (15) auf der ersten Trägerseite (12) ausgebildet ist;
    eine erste Massefläche (18), die auf der ersten Trägerseite (12) ausgebildet ist, wobei die erste Massefläche (18) mit dem ausstrahlenden Element (15) elektrisch verbunden ist; und eine zweite Massefläche (19), die auf der zweiten Trägerseite (13) ausgebildet ist, wobei die zweite Massefläche (19) mit der ersten Massefläche (18) elektrisch verbunden ist,
    dadurch gekennzeichnet, dass der Träger (11) mindestens 1 mm stark ist.
  2. Antenne (10) gemäß Anspruch 1, wobei eines oder mehrere des ausstrahlenden Elements (15), der ersten Massefläche (18) und der zweiten Massefläche (19) eine Metallschicht auf der Oberfläche des Trägers (11) ist.
  3. Antenne (10) gemäß Anspruch 1 oder Anspruch 2, wobei die erste Massefläche (18) mindestens teilweise über der zweiten Massefläche (19) liegt.
  4. Antenne (10) gemäß einem der Ansprüche 1 bis 3, wobei die erste Massefläche (18) im Wesentlichen ganz über der zweiten Massefläche (19) liegt.
  5. Antenne (10) gemäß einem der Ansprüche 1 bis 4, wobei mindestens eine der ersten und zweiten Massefläche (18, 19) eine Höhe von im Wesentlichen λ / 2 aufweist, wobei λ die Wellenlänge einer elektromagnetischen Welle bei der Resonanzfrequenz der Antenne (10) ist.
  6. Antenne (10) gemäß einem der Ansprüche 1 bis 5, wobei die erste und zweite Massefläche (18,19) durch mindestens ein Kontaktloch (20) verbunden sind.
  7. Antenne (10) gemäß Anspruch 6, wobei die erste und zweite Massefläche (18, 19) durch eine Vielzahl von Kontaktlöchern (20) verbunden sind, die durch einen maximalen Abstand d(max) = λ / 10 getrennt sind, wobei λ die Wellenlänge einer elektromagnetischen Welle bei der Resonanzfrequenz der Antenne (10) ist.
  8. Antenne (10) gemäß einem der Ansprüche 1 bis 7, wobei das ausstrahlende Element (15) eine umgekehrte F-Form ist.
  9. Antenne (10) gemäß einem der Ansprüche 1 bis 8, wobei der Träger (11) mindestens 3 mm stark ist.
  10. In Kombination (1), eine Verarbeitungsvorrichtung (2) für elektromagnetische Wellen und eine Antenne (10) gemäß einem der Ansprüche 1 bis 9, wobei die Antenne (10) angeordnet ist, um die elektromagnetische Welle zu senden und/oder zu empfangen, und die Verarbeitungsvorrichtung (2) angeordnet ist, um die elektromagnetische Welle zu verarbeiten.
  11. Kombination (1) gemäß Anspruch 10, wobei die Vorrichtung (2) ein elektrisch isolierendes äußeres Gehäuse (31) und ein elektrisch leitendes inneres Chassis (32) aufweist und die Antenne (10) am inneren Chassis (32) befestigt ist.
  12. Kombination (1) gemäß Anspruch 10, wobei die Vorrichtung (2) ein elektrisch isolierendes Gehäuse (31) aufweist und die Antenne (10) an dem Gehäuse (31) derart befestigt ist, dass die zweite Trägerseite (13) dem Gehäuse (31) zugewandt ist.
  13. Kombination (1) gemäß Anspruch 10, wobei die Vorrichtung (2) ein elektrisch isolierendes Gehäuse (31) aufweist, wobei das Gehäuse (31) einen nach innen vorstehenden Sockel (35) aufweist, wobei die Antenne (10) am Sockel (35) befestigt ist.
  14. Kombination (1) gemäß einem der Ansprüche 10 bis 13, wobei mindestens eine der ersten und zweiten Massefläche (18, 19) der Antenne (10) mit einer Masse der Vorrichtung (2) verbunden ist.
  15. Kombination (1) gemäß einem der Ansprüche 10 bis 14, wobei die Kombination (1) ein Fernsehgerät bereitstellt.
  16. Kombination (1) gemäß einem der Ansprüche 10 bis 14, wobei die Kombination (1) ein drahtloses Kommunikationsgerät für einen Computer bereitstellt.
  17. Verfahren zur Herstellung einer Antenne (10), wobei das Verfahren Folgendes beinhaltet:
    Ausbilden auf einer ersten Oberfläche eines Trägers (11) eines Elements (15) zum Ausstrahlen elektromagnetischer Wellen und einer ersten Massefläche (18), wobei die erste Massefläche (18) mit dem ausstrahlenden Element (15) elektrisch verbunden ist;
    Ausbilden auf einer zweiten Oberfläche des Trägers (11) einer zweiten Massefläche (19), wobei die zweite Massefläche (19) mit der ersten Massefläche (18) elektrisch verbunden ist, wobei die zweite Oberfläche des Trägers (11) der ersten Oberfläche des Trägers (11) entgegengesetzt ist und
    wobei das ausstrahlende Element (15) das einzige ausstrahlende Element (15) ist, das auf dem Träger (11) ausgebildet ist,
    dadurch gekennzeichnet, dass der Träger (11) mindestens 1 mm stark ist.
  18. Verfahren gemäß Anspruch 17, wobei mindestens eines des ausstrahlenden Elements (15), der ersten Massefläche (18) und der zweiten Massefläche (19) durch Strukturieren eines auf dem Träger (11) abgeschiedenen Metalls ausgebildet wird.
  19. Verfahren gemäß Anspruch 17 oder Anspruch 18, das das Ausbilden der ersten Massefläche (18) beinhaltet, um mindestens teilweise über der zweiten Massefläche (19) zu liegen.
  20. Verfahren gemäß einem der Ansprüche 17 bis 19, das das Ausbilden der ersten Massefläche (18) beinhaltet, um im Wesentlichen ganz über der zweiten Massefläche (19) zu liegen.
  21. Verfahren gemäß einem der Ansprüche 17 bis 20, wobei mindestens eine der ersten und zweiten Massefläche (18, 19) eine Höhe von im Wesentlichen λ / 2 aufweist, wobei λ die Wellenlänge einer elektromagnetischen Welle bei der Resonanzfrequenz der Antenne (10) ist.
  22. Verfahren gemäß einem der Ansprüche 17 bis 21, das das Ausbilden von mindestens einem Kontaktloch (20) beinhaltet, um die erste und zweite Massefläche (18, 19) zu verbinden.
  23. Verfahren gemäß Anspruch 22, das das Ausbilden einer Vielzahl von Kontaktlöchern (20) beinhaltet, um die erste und zweite Massefläche (18,19) zu verbinden, sodass die Kontaktlöcher (20) durch einen maximalen Abstand d(max) = λ / 10 getrennt sind, wobei λ die Wellenlänge einer elektromagnetischen Welle bei der Resonanzfrequenz der Antenne (10) ist.
  24. Verfahren gemäß einem der Ansprüche 17 bis 23, wobei das ausstrahlende Element (15) ausgebildet ist, um eine umgekehrte F-Form zu sein.
EP07252019.0A 2007-05-17 2007-05-17 Antenne und Herstellungsverfahren dafür Active EP2001080B1 (de)

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WO1999043037A2 (en) * 1998-02-23 1999-08-26 Qualcomm Incorporated Uniplanar dual strip antenna
US6307525B1 (en) * 2000-02-25 2001-10-23 Centurion Wireless Technologies, Inc. Multiband flat panel antenna providing automatic routing between a plurality of antenna elements and an input/output port

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US6172646B1 (en) * 1999-03-15 2001-01-09 Murata Manufacturing Co., Ltd. Antenna apparatus and communication apparatus using the antenna apparatus
JP2002100887A (ja) * 2000-09-25 2002-04-05 Toshiba Corp 電子機器
US6700540B2 (en) * 2002-02-14 2004-03-02 Ericsson, Inc. Antennas having multiple resonant frequency bands and wireless terminals incorporating the same
US6664926B1 (en) * 2002-03-12 2003-12-16 Centurion Wireless Tech., Inc. Compact planar antenna
TWI237419B (en) * 2003-11-13 2005-08-01 Hitachi Ltd Antenna, method for manufacturing the same and portable radio terminal employing it
US7183981B1 (en) * 2005-09-02 2007-02-27 Arcadyan Technology Corporation Monopole antenna

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Publication number Priority date Publication date Assignee Title
WO1999043037A2 (en) * 1998-02-23 1999-08-26 Qualcomm Incorporated Uniplanar dual strip antenna
US6307525B1 (en) * 2000-02-25 2001-10-23 Centurion Wireless Technologies, Inc. Multiband flat panel antenna providing automatic routing between a plurality of antenna elements and an input/output port

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