EP0707355B1 - Antenne - Google Patents

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Publication number
EP0707355B1
EP0707355B1 EP19950115886 EP95115886A EP0707355B1 EP 0707355 B1 EP0707355 B1 EP 0707355B1 EP 19950115886 EP19950115886 EP 19950115886 EP 95115886 A EP95115886 A EP 95115886A EP 0707355 B1 EP0707355 B1 EP 0707355B1
Authority
EP
European Patent Office
Prior art keywords
circuit board
current supply
main circuit
antenna device
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.)
Expired - Lifetime
Application number
EP19950115886
Other languages
German (de)
English (en)
Other versions
EP0707355A1 (fr
Inventor
Teruhisa C/O Murata Manufacturing Co. Ltd Tsuru
Harufumi c/o Murata Manufacturing Co. Ltd Mandai
Koji c/o Murata Manufacturing Co. Ltd. Shiroki
Kenji c/o Murata Manufacturing Co. Ltd. Asakura
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.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
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 Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Publication of EP0707355A1 publication Critical patent/EP0707355A1/fr
Application granted granted Critical
Publication of EP0707355B1 publication Critical patent/EP0707355B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01Q1/12—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
    • 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 device for use in a mobile communication apparatus such as a portable telephone.
  • Fig. 9 shows this inverted F type antenna.
  • the inverted F type antenna shown in Fig. 9 has a rectangular metallic plate 72 which functions as a radiating portion.
  • a grounding terminal 73 is formed on one side of the metallic plate 72 by being bent so as to be perpendicular to the metallic plate 72.
  • a current supply terminal 74 is also formed on another side of the metallic plate 72 by bending a portion of the metallic plate 72.
  • the inverted F type antenna is constructed as described above and can be mounted on a printed circuit board by inserting its grounding and current supply terminals into through holes formed in the printed circuit board.
  • a circuit board surface mount type antenna (hereinafter referred to as "surface mount type antenna") in Japanese Patent Application No. 81652/1994, not published yet, which is related to commonly assigned U.S. Serial No. 08/230,857 filed April 21, 1994, allowed September 19, 1995.
  • Fig. 10 shows this surface mount type antenna
  • Figs. 11 to 14 show an example of the surface mount type antenna in which an antenna switch circuit is mounted as an antenna circuit.
  • a member 1 is a dielectric substrate in the form of a rectangular prism made of a ceramic or resin, and a pair of grounding electrodes 2 are formed on opposite side surfaces of the dielectric substrate 1 corresponding to the longer sides of the two major surfaces of the dielectric substrate 1 while connection electrodes 3a, 3b, and 3c are formed on the other opposite side surfaces corresponding to the shorter sides.
  • a member 4 is a metallic chassis made of, for example, copper or a copper alloy and having, as viewed in a cross section, the shape of a rectangle open at one side.
  • the metallic chassis 4 has a rectangular flat radiating portion 5, and two fixing portions 6 and 7 bent downwardly and perpendicularly from shorter-side opposite ends of the radiating portion 5.
  • a current supply terminal 8 and a grounding terminal 9 are formed integrally on the extreme end of the fixing portion 6.
  • the fixing portion 6 is reduced in length relative to the fixing portion 7 to form the current supply terminal 8 and the grounding terminal 9.
  • the overall length of the fixing portion 6, including the length of the current supply terminal 8 and the grounding terminal 9, is set so as to be larger than the thickness of the dielectric substrate 1.
  • the dielectric substrate 1 is inserted into the metallic chassis 4 with the shorter-side side surfaces of the dielectric substrate 1 brought into contact with inner surfaces of the fixing portions 6 and 7 of the metallic chassis 4. At this time, a vacant space 10 is formed between the radiating portion 5 of the metallic chassis 4 and the obverse surface of the dielectric substrate 1 due to the difference between the values of the thickness of the dielectric substrate 1 and the length of the fixing portion 6 including the current supply terminal 8 and the grounding terminal 9 and the fixing portion 7.
  • the connection terminal 3a of the dielectric substrate 1 is soldered to the fixing portion 7 of the metallic chassis 4. Also, the connection terminals 3b and 3c of the dielectric substrate 1 are respectively soldered to the current supply terminal 8 and the grounding terminal 9 of the metallic chassis 4.
  • a surface mount type antenna 13 is constructed.
  • a main circuit board 15 has, on its obverse surface, a micro-strip line 16 for supplying an antenna current, connected to an antenna circuit, e.g., an antenna switch circuit (not shown), and grounding electrodes 17a insulated from the micro-strip line 16. Also, a grounding electrode 17b is formed generally over the entire reverse surface of the main circuit board 15.
  • the surface mount type antenna 13 is placed on the obverse surface of the main circuit board 15, the current supply terminal 8 and the micro-strip line 16 are soldered to each other, and the pair of grounding electrodes 2 and the grounding electrode 9 are soldered to the grounding electrodes 17a on the obverse surface of the main circuit board 15.
  • the surface mount type antenna 13 is thus mounted on the main circuit board 15 in a surface mount manner. Electric waves are transmitted or received through the radiating portion 5 of the metallic chassis 4.
  • a member 21 is a multilayer dielectric substrate in the form of a rectangular prism made of a ceramic or a resin.
  • a transmission input portion TX, a receiving output portion RX, control input portions VC1 and VC2 of an antenna switch circuit and a plurality of grounding electrodes 22 are formed as external electrodes on opposite side surfaces of the dielectric substrate 21 corresponding to the longer sides of the two major surfaces of the dielectric substrate 21 while connection electrodes 23a, 23b, and 23c are formed on the other opposite side surfaces corresponding to the shorter sides.
  • a strip line 24a and capacitors 24b are formed in the dielectric substrate 21 while diodes 24c and printed resistors 24d are mounted on the obverse surface of the dielectric substrate 21, thus forming an antenna switch circuit 24.
  • An antenna output portion 24e of the antenna switch circuit 24 in the dielectric substrate 21 is connected to the connection electrode 23b on the side surface, and the circuit elements are connected to each other by internal electrodes or via holes.
  • a member 26 is a metallic chassis made of, for example, copper or a copper alloy and having, as viewed in a cross section, the shape of a rectangle open at one side.
  • the metallic chassis 26 has a rectangular flat radiating portion 27, and two fixing portions 28 and 29 bent downwardly and perpendicularly from shorter-side opposite ends of the radiating portion 27.
  • a current supply terminal 30 and a grounding terminal 31 are formed integrally on the extreme end of the fixing portion 28.
  • the fixing portion 28 is reduced in length relative to the fixing portion 29 to form the current supply terminal 30 and the grounding terminal 31.
  • the overall length of the fixing portion 29, including the length of the current supply terminal 30 and the grounding terminal 31, is set so as to be larger than the thickness of the dielectric substrate 21.
  • the dielectric substrate 21 is inserted into the metallic chassis 26 with the shorter-side side surfaces of the dielectric substrate 21 brought into contact with inner surfaces of the fixing portions 28 and 29 of the metallic chassis 26. At this time, a vacant space 32 is formed between the radiating portion 27 of the metallic chassis 26 and the obverse surface of the dielectric substrate 21 due to the difference between the values of the thickness of the dielectric substrate 21 and the length of the fixing portion 28 including the current supply terminal 30 and the grounding terminal 31 and the fixing portion 29.
  • the connection terminal 23a of the dielectric substrate 21 is soldered to the fixing portion 29 of the metallic chassis 26. Also, the connection terminals 23b and 23c of the dielectric substrate 21 are respectively soldered to the current supply terminal 30 and the grounding terminal 31 of the metallic chassis 26.
  • a surface mount type antenna 35 is constructed.
  • Connection electrodes 37, 38, 39, and 40 and grounding electrodes 41a insulated from the connection electrodes 37 to 40 are formed on the obverse surface of a main circuit board 36.
  • a grounding electrode 41b are formed on the entire reverse surface of the main circuit board 36.
  • the surface mount type antenna 35 is placed on the obverse surface of the main circuit board 36, and the transmission input portion TX, the receiving output portion RX and the control input portions VC1 and VC2 are respectively soldered to the connection electrodes 37 to 40 while the grounding electrodes 22 and the grounding terminal 31 are soldered to the grounding electrodes 41a.
  • the surface mount type antenna 35 is thus mounted on the main circuit board 36 in a surface mount manner. Electric waves are transmitted or received through the radiating portion 27 of the metallic chassis 26.
  • Fig. 13 shows a well-known circuit as an example of the antenna switch circuit 24, and Fig. 14 is a block diagram of the antenna 35.
  • An antenna circuit such as a low-pass filter or a band-pass filter may be mounted as well as the antenna circuit 24 shown in Fig. 13.
  • the impedance of the inverted F type antenna 71 is determined by the position of the current supply terminal 4, the distance between the grounding terminal 3 and the current supply terminal 4 and other factors. Therefore, it is necessary to change the shape of the inverted F type antenna 71 in order to set or finely adjust the impedance of the antenna. Also in the case of the surface mount type antennas 13 and 35, the impedance is determined by the position of the current supply terminal 30, the distance between the grounding terminal 31 and the current supply terminal 30 and other factors. Accordingly, it is necessary to change the shape of the surface mount type antennas 13 and 35 for the purpose of setting or finely adjusting the impedance.
  • EP 0 526 643 A describes an antenna device comprising an inverted F antenna.
  • the device has a plate conductor and a ground conductor arranged parallel to each other.
  • a dielectric substrate provided with a third conductor plate is mounted on the ground conductor, and the third conductor plate is connected with an internal conductor of a coaxial line.
  • the inverted F antenna is connected to the third conductor and to the ground conductor.
  • EP 0 246 026 A describes an inverted L antenna for wireless communication equipment, having a L-shaped conductor which comprises a first vertical portion and a second horizontal portion connected by a conductive portion. A further conductor is arranged parallel to the horizontal portion of the antenna. One end of the antenna is connected to a feeding point, and the other end is connected to ground.
  • the current supply element and the radiating element are in contact with each other.
  • the current supply element and the radiating element are spaced apart from each other by such a distance as to be electromagnetically connected to each other.
  • a surface mount type antenna is used as the current supply element.
  • At least one edge of the radiating element is bent toward the main circuit board having a grounding electrode so as to be brought close to the grounding electrode.
  • a part or the whole of the current supply element is inserted into a hole provided in the main circuit board.
  • the radiating element is made of an electroconductive material.
  • the radiating element is provided on a major surface of the main circuit board having the grounding electrode opposite from the surface of the main circuit board facing a human body.
  • the current supply element is placed on the main circuit board while the radiating element is apart from the main circuit board, so that the area on the main circuit board occupied by the antenna device is limited.
  • the radiating element is placed in the gap between the main circuit board and the outer case for accommodating the main circuit board, i.e., the space not used in the conventional arrangement. Therefore, the area of the radiating element can be largely increased without changing the overall size of the mobile communication apparatus. Accordingly, it is possible to increase the gain and the frequency band width of the antenna device.
  • Figs. 1(A) to 1(C) and 2 show an antenna device 51a and a current supply element 52 in accordance with a first embodiment of the present invention.
  • the antenna device 51a is incorporated in a portable telephone 61.
  • Figs. 1(A), 1(B), and 1(C) are a perspective view, a front view and a side view, respectively, of the antenna device seen through a case, and
  • Fig. 2 is a perspective view of the current supply element 52.
  • the antenna device 51a has the current supply element 52 and a radiating element 56a, and is mounted on a main circuit board 53a with the current supply element 52 placed on a major surface of the main circuit board 53a.
  • the current supply element 52 is connected to a micro-strip line 66 which is formed on the main circuit board 53a to supply an antenna current.
  • the radiating element 56a is accommodated in a vacant space formed between the main circuit board 53a and an outer case 55 in which the main circuit board 53a is accommodated.
  • the current supply element 52 is grounded to a grounding electrode 67a formed on the main circuit board 53a while the radiating element 56a is grounded to the outer case 55.
  • shield covers 54a and 54b are attached to the two surfaces of the main circuit board 53a over the entire areas thereof excepting the area where the current supply element 52 is placed.
  • the current supply element 52 is made of, for example, copper or a copper alloy and has, as viewed in a cross section, the shape of a rectangle open at one side.
  • the current supply element 52 has a rectangular flat opposed portion 52a opposed to the major surface of the radiating element 56a in parallel with the same, and two leg portions 52b and 52c bent downwardly and perpendicularly from shorter-side opposite ends of the opposed portion 52a.
  • a current supply terminal 52d and a grounding terminal 52e are formed integrally on the extreme end of the leg portion 52b.
  • the micro-strip line 66 and grounding electrodes 67a formed on the obverse surface of the main circuit board 53a are insulated from each other.
  • a grounding electrode 67b is formed generally over the entire reverse surface of the main circuit board 53a.
  • the current supply element 52 is placed on the obverse surface of the main circuit board 53a, the current supply terminal 52d and the micro-strip line 66 are soldered to each other, and the grounding terminal 52e is soldered to the grounding electrode 67a on the obverse surface of the main circuit board 53a.
  • the shape of the current supply element 52 is not limited to that shown in Fig. 2, and the current supply element 52 may have any other shape as long as at least one current supply terminal 52d and at least one grounding terminal 52e are provided and a transmitted electric wave output can be supplied to the radiating element 56a electrically or electromagnetically.
  • the current supply element 52 may be formed of a metallic block.
  • the positional relationship between the current supply terminal 52d and the grounding terminal 52e is not limited to that shown in Fig. 2.
  • the current supply terminal 52d and the grounding terminal 52e may be respectively formed on different leg portions of the current supply element 52.
  • a dielectric may be inserted in the current supply element 52 to provide the current supply element 52 with an electrostatic capacity.
  • the current supply element 52 and the radiating element 56a in contact with each other are electrically connected as shown in Fig. 3(A), and a transmitted electric wave output from the current supply element 52 is radiated through the radiating element 56a.
  • C1 represents a stray capacity of the radiating element 56a.
  • the radiating element 56a is placed in the gap between the main circuit board 53a and the outer case 55 for accommodating the main circuit board 53a, i.e., the space not used in the conventional arrangement. Accordingly, the area of the radiating element 56a can be largely increased without changing the overall size of the portable telephone 61, thus making it possible to increase the gain and the frequency band width of the antenna device.
  • the position of the radiating element 56a opposed to the current supply element 52 can be selected to change the resonance frequency and the impedance characteristic of the antenna 51a, whereby the reflection loss can be reduced. Accordingly, it is not necessary to change the shapes of the current supply element 52 and the radiating element 56a in order to set or finely adjust the impedance, and impedance setting or fine adjustment can be performed easily in comparison with the conventional art. It is possible to reduce the Joule loss by forming the radiating element 56a of an electroconductive material such as copper or a copper alloy. The gain of the antenna can be improved thereby.
  • the radiating element 56a is provided on the major surface of the main circuit board 53a having the grounding electrodes 67a and 67b opposite from the surface facing the human body of a user to attenuate the output transmitted in the direction of the human body by a shielding effect of the grounding electrodes 67a and 67b, thereby reducing the influence of the transmission output on the human body.
  • Each of the surface mount type antennas 13 and 35 constructed as shown in Figs. 10 to 13 may be used in place of the current supply element 52.
  • the surface mount type antenna 13 or 35 and the radiating element 56a are electrically connected to each other as shown in Fig. 3(B), and a transmitted electric wave output from the surface mount type antenna is radiated from the radiating element 56a.
  • the above-described effect of the present invention can also be achieved by the operation of the radiating element 56a while the same antenna unit as the surface mount type antenna is used.
  • Figs. 4(A) and 4(B) show an antenna device 51b in accordance with a second embodiment of the present invention.
  • the antenna device 51b is incorporated in a portable telephone 62.
  • Figs. 4(A) and 4(B) are front and side views of the antenna device seen through a case.
  • the components identical or corresponding to those shown in Fig. 1 are indicated by the same reference characters and the description for them will not be repeated.
  • the antenna device 51b is constructed in such a manner that the antenna device 51a and the current supply element 52 of the first embodiment are mounted while being spaced apart from each other by such a distance as to be electromagnetically connected to each other.
  • the current supply element 52 and the radiating element 56a are electromagnetically connected by a magnetic field and a stray capacity in the space formed between the current supply element 52 and the radiating element 56a, as shown in Fig. 5(A), and a transmitted electric wave output from the current supply element 52 is radiated by the radiating element 56a.
  • C2 represents the stray capacity of the radiating element 56a.
  • the current supply portion 52 and the radiating element 56a are not electrically connected since they do not contact each other, but they are electromagnetically connected to each other. Therefore, the same effect as that of the above-described antenna device 51a of the first embodiment can also be obtained.
  • each of the surface mount type antennas shown in Figs. 10 to 13 can be used as the current supply element 52.
  • the surface mount type antenna 13 or 35 and the radiating element 56a are electromagnetically connected to each other by a magnetic field and a stray capacity in the space between the surface mount type antenna 13 or 35 and the radiating element 56a, as shown in Fig. 5(B), and a transmitted electric wave output from the surface mount type antenna can therefore be radiated from the radiating element 56a.
  • Fig. 6(A) shows a side view of an antenna device 51c in accordance with a third embodiment of the present invention seen through a case.
  • the antenna device 51c is incorporated in a portable telephone 63.
  • the components identical or corresponding to those shown in Fig. 1 are indicated by the same reference characters and the description for them will not be repeated.
  • a radiating element 56b is provided by bending one edge 56z of the radiating element 56a of the first embodiment toward a main circuit board 53a having a grounding electrode (not shown) so that the edge 56z is brought close to the grounding electrode.
  • the edge 56z of the radiating element 56b is brought close to the grounding electrode 67a so that the distance between the radiating element 56b and ground is small. In this manner, the stray capacity of the radiating element 56b can be increased. Consequently, the resonance frequency of the antenna device 51c can be lowered.
  • another antenna device 51c may be constructed in such a manner that, a shown in Fig. 6(B), a radiating element 56b is formed by bending one edge 56z of the radiating element 56a of the second embodiment toward the main circuit board 53a so that the edge 56z is brought close to the main circuit board 53a, thereby obtaining the same effect as the above-described arrangements.
  • the antenna device 51c can function with substantially the same effect as those described above as long as the bent edge 56g is provided as at least a part of the edges of the radiating element 56b.
  • Figs. 7(A), 7(B), and 7(C) show an antenna device 51d in accordance with a fourth embodiment of the present invention.
  • the antenna device 51d is incorporated in a portable telephone 64.
  • Figs. 7(A), 7(B) and 7(C) are a perspective view, a front view and a side view, respectively of the antenna device seen through a case.
  • the components identical or corresponding to those shown in Fig. 1 are indicated by the same reference characters and the description for them will not be repeated.
  • a main circuit board 53b is provided by forming a hole 57 in the main circuit board 53a of the first embodiment, and a part of the current supply element 52 is inserted into the hole 57.
  • a part of the current supply element 52 is inserted into the hole 57 formed in the main circuit board 53b to reduce the height of the current supply element 52 projecting from the main circuit board 53b.
  • the height of the portion of the antenna device 51d projecting from the main circuit board 53b is correspondingly reduced.
  • the arrangement may also be such that, as shown in Figs. 8(A) and 8(B), a main circuit board 53b is provided by forming a hole 57 in the main circuit board 53a of the second embodiment, and a part of the current supply element 52 is inserted into the hole 57, thereby achieving the same effect as in the above-described arrangement.
  • another antenna device 51d may be constructed by bending an edge of the radiating element 56a so as to form a radiating element 56b, as in the case of the antenna device 51c of the third embodiment shown in Figs. 6(A) and 6(B).
  • the current supply element 52 may be mounted so that its portion projects on the reverse side of the main circuit board 53b through the hole 57.
  • the antenna device of the present invention as described above, only the current supply element of the antenna device is placed on the main circuit board while the radiating element is apart from the main circuit board, so that the area on the main circuit board occupied by the antenna device is limited and the desired flexibility of circuit layout can be maintained.
  • the radiating element is placed in the gap between the main circuit board and the outer case for accommodating the main circuit board, i.e., the space not used in the conventional arrangement. Therefore, the area of the radiating element can be largely increased relative to that of the radiating element of the surface mount type antenna without changing the overall size of the portable telephone. Consequently, it is possible to increase the gain and the frequency band width of the antenna device.
  • the current supply element and the radiating element are electrically connected to enable the transmitted electric wave output from the current supply element to be radiated from the radiating element.
  • the transmitted electric wave output from the current supply element can also be radiated from the radiating element since the current supply element and the radiating element are electromagnetically connected to each other.
  • a surface mount type antenna may also be used in place of the current supply element to obtain the above-described effect.
  • the arrangement may also be such that an edge of the radiating portion is bent toward the main circuit board having a grounding electrode so as to be brought close to the grounding electrode, whereby the distance between the radiating element and ground is reduced and the stray capacity of the radiating element is increased. As a result, the resonance frequency of the antenna device can be lowered.
  • a part or the whole of the current supply element may be inserted into a hole formed in the main circuit board to reduce the height of the part of the current supply element projecting from the main circuit board.
  • the height of the portion of the antenna device projecting from the main circuit board is reduced, thereby reducing the overall thickness of the mobile communication apparatus.
  • the radiating element is made of an electroconductive material to reduce the Joule loss of the radiating element, thereby increasing the gain of the antenna device.
  • the radiating element is provided on the major surface of the main circuit board with the grounding electrode opposite from the surface facing the human body of a user, so that the transmission output in the direction of the human body attenuates by the shielding effect of the grounding electrode. The influence of the transmission output on the human body is reduced thereby.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Waveguide Aerials (AREA)

Claims (7)

  1. Dispositif d'antenne (51a; 51b; 51c; 51d) incorporé à un appareil de communication mobile (61; 62; 63; 64) comprenant une carte de circuit principale (53a; 53b) et un boítier extérieur (55), comprenant :
    un élément d'alimentation électrique (52) monté sur ladite carte de circuit principale (53a; 53b), et possédant une borne d'alimentation électrique (52d) reliée à ladite carte de circuit principale (53a; 53b); et
    un élément (56a; 56b) émettant un rayonnement couplé de façon électromagnétique audit élément d'alimentation électrique (52) et disposé dans un espace existant entre ladite carte de circuit principale (53a; 53b) et ledit boítier extérieur (55) dans lequel est logée ladite carte de circuit principale (53a; 53b), une des deux surfaces principales dudit élément émetteur de rayonnement (56a; 56b) faisant face audit élément d'alimentation électrique (52);
    caractérisé en ce que
       ledit élément d'alimentation électrique (52) a une borne de terre (52e) reliée à ladite carte de circuit principale (53a; 53b), ladite borne de terre (52e) étant reliée à une électrode de terre (67a) sur une surface majeure de ladite carte de circuit principale, et ladite ligne d'alimentation électrique (52d) étant reliée à une ligne microruban (66) sur ladite surface majeure de ladite carte de circuit principale (53a; 53b); et
       ledit élément émetteur de rayonnement (56a; 56b) et ladite carte de circuit principale (53a; 53b) sont espacés l'un de l'autre.
  2. Dispositif d'antenne (51a; 51c; 51d) selon la revendication 1, dans lequel ledit élément d'alimentation électrique (52) et ledit élément émetteur de rayonnement (56a; 56b) sont en contact l'un avec l'autre.
  3. Dispositif d'antenne (51b; 51c; 51d) selon la revendication 1, dans lequel ledit élément d'alimentation électrique (52) et ledit élément émetteur de rayonnement (56a; 56b) sont espacés l'un de l'autre d'une telle distance telle qu'ils soient reliés l'un à l'autre de façon électromagnétique.
  4. Dispositif d'antenne (51c) selon l'une quelconque des revendications 1 à 3, dans lequel au moins un bord dudit élément émetteur de rayonnement (56b) est replié vers ladite carte de circuit principale (53a) possédant ladite électrode de mise à la terre (67a) de façon à être amené à proximité de l'électrode de mise à la terre (67a).
  5. Dispositif d'antenne (51d) selon l'une quelconque des revendications 1 à 3, dans lequel une partie ou la totalité dudit élément d'alimentation électrique (52) est insérée dans un trou (57) pratiqué dans ladite carte de circuit principale (53b).
  6. Dispositif d'antenne selon l'une quelconque des revendications 1 à 5, dans lequel ledit élément émetteur de rayonnement (56a; 56b) est fait en un matériau conducteur électrique.
  7. Dispositif d'antenne (51a; 51b; 51c; 51d) selon l'une quelconque des revendications 1 à 6, dans lequel ledit élément émetteur de rayonnement (56a; 56b) est disposé adjacent à ladite surface majeure de ladite carte de circuit principale (53a; 53b), ladite surface majeure étant du côté opposé de la surface de ladite carte de circuit principale tournée vers un corps humain.
EP19950115886 1994-10-11 1995-10-09 Antenne Expired - Lifetime EP0707355B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP24558794A JPH08111609A (ja) 1994-10-11 1994-10-11 アンテナ装置
JP24558794 1994-10-11
JP245587/94 1994-10-11

Publications (2)

Publication Number Publication Date
EP0707355A1 EP0707355A1 (fr) 1996-04-17
EP0707355B1 true EP0707355B1 (fr) 2002-07-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950115886 Expired - Lifetime EP0707355B1 (fr) 1994-10-11 1995-10-09 Antenne

Country Status (3)

Country Link
EP (1) EP0707355B1 (fr)
JP (1) JPH08111609A (fr)
DE (1) DE69527244T2 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10145125A (ja) * 1996-09-10 1998-05-29 Murata Mfg Co Ltd アンテナ装置
DE19722506A1 (de) * 1997-05-30 1998-12-03 Bosch Gmbh Robert Funkgerät
SE522419C2 (sv) 1999-10-29 2004-02-10 Ericsson Telefon Ab L M Modulantenn
JP2002016429A (ja) * 2000-06-28 2002-01-18 Matsushita Electric Ind Co Ltd 基板実装形板状アンテナ
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EP0707355A1 (fr) 1996-04-17
DE69527244T2 (de) 2002-10-31
DE69527244D1 (de) 2002-08-08
JPH08111609A (ja) 1996-04-30

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