EP0604338B1 - Antenne large bande à encombrement réduit, et dispositf d'émission/réception correspondant - Google Patents
Antenne large bande à encombrement réduit, et dispositf d'émission/réception correspondant Download PDFInfo
- Publication number
- EP0604338B1 EP0604338B1 EP19930460039 EP93460039A EP0604338B1 EP 0604338 B1 EP0604338 B1 EP 0604338B1 EP 19930460039 EP19930460039 EP 19930460039 EP 93460039 A EP93460039 A EP 93460039A EP 0604338 B1 EP0604338 B1 EP 0604338B1
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- European Patent Office
- Prior art keywords
- antenna
- antenna according
- horizontal element
- blades
- essentially
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Classifications
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- 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
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- 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
Definitions
- the field of the invention is that of radio transmissions. More specifically, the invention relates to transmitting and / or receiving antennas, in particular for smaller equipment, such as portable devices.
- the invention thus applies, in particular, to telecommunications systems with mobiles.
- the extension of radiocommunication networks with land mobiles requires the development of portable autonomous stations having the dual functionality for transmitting and receiving microwave signals. These stations must therefore include an integrated antenna.
- These antennas are generally in the form of a radiating element installed outside of a metal case, for example of rectangular shape, constituting the shielding of one or more electronic cards ensuring in particular the modulation and demodulation functions of microwave signals, in transmission and in reception respectively.
- Such an inverted F antenna is shown in section in FIG. 1 and in perspective in FIG. 2. It consists of a rectangular conducting element horizontal 11 and a vertical conductive element 12. The vertical element 12 provides a short-circuit function on the horizontal element 11, by connecting one of its ends 13 to a ground plane 14.
- the other end 15 of the horizontal element 11 is open.
- the microwave signal is conveyed by an excitation coaxial 16, which is connected to the horizontal element 11 at a location 17.
- the choice of this location 17 between the short-circuited end 13 and the open end 15 of the horizontal element 11 determines the impedance of the antenna thus obtained.
- the antenna obtained is therefore very compact.
- the radiation pattern of this antenna is substantially omnidirectional, which is essential for portable devices (this characteristic is generally verified by all small footprint antennas).
- this antenna has very dispersive characteristics in frequency, and therefore, consequently, a very low bandwidth, and for example of in the range of 2 to 3%. This is due to the fact that this antenna structure behaves substantially as a ⁇ / 4 resonator.
- the bandwidth of an antenna is here defined as the frequency band on which the Stationary Wave Ratio (R.O.S) is less than 2.
- R.O.S Stationary Wave Ratio
- This quantity is directly related to the input impedance of the antenna, which must be adapted to the impedance of the transmission line carrying the microwave signal to send and / or receive. For optimal functioning of the antenna, it is necessary that this impedance remains substantially constant (i.e. the R.O.S remains lower to 2) over a large frequency band. A bandwidth of 2 to 3% as obtained at using an inverted F antenna is generally insufficient.
- the invention particularly aims to overcome this drawback of the technique anterior.
- an objective of the invention is to provide an antenna small footprint with a large pass.
- the invention has in particular aims to provide such an antenna, whose bandwidth is at least of the order from 8 to 10%.
- Another object of the invention is to provide such an antenna, which is of a reduced cost price.
- the invention aims to provide such a antenna which is easy to produce, and which does not use expensive material.
- the invention also aims to provide such an antenna, which can operate over a wide range of input impedances, and in particular for input impedances between 10 and 200 Ohms.
- the invention also aims to provide such an antenna, the tuning frequency can be fine-tuned.
- a goal of the invention is to provide such an antenna, the tuning frequency of which can be modified permanently and quickly, for example to allow alternating operation.
- the useful volume of the antenna is increased, compared to the antenna known in reverse F. This results in an increase in bandwidth.
- the overall size of the antenna is not modified.
- Such an antenna has a radiation pattern of the type omnidirectional, which is essential, since it is notably intended to equip portable devices, which can therefore take any position.
- the terms "horizontal” and “vertical” are therefore used only to simplify the understanding of the invention, and should not be interpreted strictly. In practice, the notions of horizontality and verticality will often be defined in relation to a ground plane on which the antenna will be fixed.
- an intermediate surface, or base, between the vertical element and the strands have many advantages. In particular, it allows for antennas adaptable to several frequencies, and to optimize the overall adaptation of the antenna. He is at note that the device of the invention forms a single antenna (a single vertical element short circuit and a single intermediate element), not a combination of two separate antenna elements.
- At least one first of the strands is a radiating element, and at least a second constitutes a strand of adaptation, brought in parallel with the impedance of radiation from the first strand.
- the second strand therefore behaves as an incorporated adaptation circuit.
- Such an antenna may include two parallel strands.
- the principle of the invention can also be generalized to more than two strands.
- said strands of the antenna are substantially shaped rectangular, and have a substantially identical width but lengths different. Other geometrical characteristics can also be retained, in depending on the characteristics desired for the antenna.
- each of said strands is open at its end furthest from said first end of said element horizontal.
- each of said strands is a resonant element.
- the end furthest from said first end of said horizontal element of at least one of said strands is connected to the electrical ground of said processing unit, via a additional short circuit element.
- the short-circuited strand at its two ends plays the role of adaptation circuit.
- the combination of the antenna strands provides a resonance loop, which leads to a bandwidth of the order of 10% per example.
- the strand shorted at both ends can be, depending on the needs and the desired characteristics, the longest strand or the strand the shortest.
- the two strands can be the same length.
- the antenna has more than two strands, it is possible to combine the advantages of the first and second embodiments. One or more strands can then be shorted at both ends.
- the end la farthest from said first end of said horizontal element by at least one of said strands is connected to the electrical ground of said processing unit, via a capacity.
- This operating mode corresponds to an intermediate position between the first embodiment (open circuit) and the second embodiment (short circuit).
- all the strands of the antenna are connected to ground electrical of said processing unit, via a capacitor. Development antenna is thus facilitated.
- At least one of these capacities is an adjustable capacity (or varactor).
- the same physical antenna can work alternately in a band transmission and in a reception band, for example to operate in half-duplex. This saves the cost of installing a second antenna.
- This technique can of course be generalized to more than two frequency bands.
- the coaxial cable carrying the microwave signals has an impedance substantially between 10 Ohms to 200 Ohms.
- the antenna input impedance can be chosen between 10 and 200 Ohms.
- this impedance can be equal to 50 Ohms.
- this wavelength ⁇ of said microwave signals is between 100 and 200 mm.
- the dimensions of the antenna are very reduced, of the order of a few centimeters.
- the antenna is located on a box containing said processing unit, said electrical mass corresponding to the electromagnetic shielding of said housing.
- said vertical element and said horizontal element are formed in the same strip of a conductive material.
- the manufacture of the assembly is particularly simple.
- the invention therefore relates to a reduced antenna with a large band busy.
- This antenna is in particular intended to equip portable devices, and by example of transmitters / receivers of radio communication networks with mobiles terrestrial.
- the antenna of the invention comprises a horizontal element (relative to a ground plane), connected at one of its ends to ground by a vertical short circuit.
- the main characteristic of the invention is to produce, by example by cutting, at least two substantially parallel antenna strands in the horizontal element. The geometric and connection characteristics of these strands are chosen so as to obtain the desired characteristics for the antenna, such as significant bandwidth.
- the antenna according to the invention can comprise more than two strands, by simple generalization of the examples described.
- FIG. 3 therefore illustrates a first embodiment of the invention.
- the antenna 31 (hatched) is located on a housing 32, likely to contain electronic cards (especially for demodulation and / or modulation of signals microwave received and / or transmitted by the antenna).
- the dimensions and the shape of this case 32 are of course purely indicative.
- the base b of the housing makes 60 mm, and its height h1 is 150 mm.
- This box 32 is shielded, and constitutes the ground to which the antenna is connected 31.
- the antenna 31 comprises a horizontal element 33, one of the ends 34 is connected to ground (housing shield 32) by a vertical short circuit element 35.
- the connected end will be designated by the first end of a strand at the base 36, and by the second end of a strand the opposite end, that is to say, in in other words, the end farthest from the first end 34 of the element horizontal 33.
- the base 36 can be omitted, the strands 37 and 38 being then directly connected to the vertical element 35.
- the horizontal element 33 is obtained by cutting from a rectangular area of a space 39 between the two strands 37 and 38, up to the base 36.
- a second cutting of a surface 310 is then carried out on the most strand short 38, to adapt its length.
- the vertical element 35 and the horizontal element 33 can be formed in the same material, the angle of the end 34 being produced for example by folding.
- the vertical part 35 can extend along the housing 32, and be fixed to this case by any suitable fixing means (not shown).
- Microwave signals are carried by an excitation coaxial 311, which connects the electronic card contained in the housing 32 and the horizontal element 33.
- the location of the connection 312 between the vertical element 35 and the second ends 313 and 314 of the two strands 37 and 38 defines the impedance of the antenna.
- This connection 312 can be on the base 36 or on one of the strands 37 or 38.
- the impedance can by example vary between 10 and 200 Ohms.
- the strands may have widths different, ends of various shapes, ...
- the two strands 37 and 38 have their second ends 313 and 314 open.
- the strand 37 of length ⁇ / 4 resonates at the working frequency f r (corresponding to the wavelength ⁇ ).
- the second strand 38 is also a resonant element, but at a frequency f ' r , different but close to f r . It behaves like a real incorporated adaptation circuit, placed in parallel with the base and the open circuit. In other words, it is brought back in parallel with the radiation impedance of the other strand, which constitutes the main radiating element.
- This first embodiment is therefore based on the introduction of frequencies of multiple resonance in the antenna. Of course, more than two strands can be used.
- FIG. 4 presents the Smith diagram carrying the impedance curve 41 of the strand 37 (resonating at f r ).
- the bandwidth corresponding to this strand 37 alone that is to say the frequency band on which the ROS is less than 2, is defined by the frequencies f 1 and f 2 corresponding to the intersections of the impedance curve 41 with the hatched disc 42 defining the zone where the ROS is less than 2.
- This bandwidth is written (f 2 - f 1 ) / f r , and is conventionally between 2 and 4%. As already mentioned, such a bandwidth is insufficient in many applications.
- the element 38 behaves similarly, but at the frequency f ' r . Its impedance curve 51 is illustrated in FIG. 5. The corresponding bandwidth (f 4 - f 3 ) / f ' r is also worth approximately 2 to 4%. However, the frequency band [f 3 , f 4 ] is significantly offset from the frequency band [f 1 , f 2 ].
- the coupling of the two radiating strands makes it possible to obtain a resonance loop, if the frequencies f r and f ' r are well chosen, as is illustrated in FIG. 6.
- the impedance curve 61 corresponding to the combination of the strands 37 and 38 has a resonance loop 62, centered on f 0 . This loop 62 remains in the disk 63 defining the zone in which the ROS is less than 2.
- FIG. 7 shows a second embodiment of the invention, in which one of the antenna strands is short-circuited at both ends.
- the general structure of this antenna is similar to that of FIG. 3, as regards the shape of the elements horizontal 33 and vertical 35. It is therefore not described again.
- the fundamental difference with the first embodiment is that the strand 72 is no longer open at its second end 313, but short-circuited by an element vertical short-circuit 71 connecting this end 313 to the shielding of the housing 32.
- This strand 72 therefore no longer plays the role of resonant element, but the role of a "stub" (or section) short circuit, which acts as an adaptation circuit, allowing the band on which the overall input impedance of the antenna remains close to the impedance of the excitation coaxial.
- a "stub" (or section) short circuit which acts as an adaptation circuit, allowing the band on which the overall input impedance of the antenna remains close to the impedance of the excitation coaxial.
- several stubs can be made.
- the embodiments of FIGS. 3 and 7 can be combined.
- FIG. 8 presents the Smith diagram carrying the impedance curve 81 corresponding to the resonant strand 38.
- the corresponding bandwidth (f 2 -f 1 ) / f 0 is always of the order of 2 to 4%.
- the Smith diagram in FIG. 9 presents the impedance 91 of the "stub" short-circuit 72. This curve 91 is substantially symmetrical to the curve 81 of the figure 8.
- This curve 101 has a resonance loop 102 which remains in the disc 103 of ROS less than 2. Consequently, the bandwidth resulting (f 4 - f 3 ) / f 0 is again enlarged, and for example of the order of 10%.
- Figure 11 shows a third embodiment of the invention. It's about in fact of a generalization of the antenna of FIGS. 3 and 7, in which the seconds ends of the strands are neither open nor short-circuited, but connected to ground at using capabilities.
- the antenna 111 comprises a first strand 112, connected to the ground 113 by a capacitor 114, and a second strand 115 connected to ground by a capacitor 116.
- These capacities 114 and 116 allow the equivalent length of the strands to be varied (which is not therefore more fixed at ⁇ / 4). This allows fine tuning of the tuning frequency.
- the antenna strands may have the same physical length, the equivalent length being modified by the capacities. Note, in addition, that it is not obligatory that all the strands are associated with a capacity. Some of them can be opened or short-circuited.
- the capacities 114 and 116 are adjustable (they are for example varactors, or several capacities in parallel likely to be selected independently), and controlled (118) by an electronic circuit command 117 placed in the housing 32. It is thus possible to vary at any time and almost instantly the bandwidth of the antenna 111. This makes it possible to operate the same physical antenna in multiple frequency bands, selectively.
- this antenna 111 allows alternating operation in a emission band (corresponding to an emission frequency) and in a band of reception (corresponding to a reception frequency).
- the device equipped with this antenna can therefore operate in "half duplex".
- Figure 12 shows, in top view, the horizontal element of a antenna as illustrated in figure 7.
- the aim of this embodiment is to operate in the nominal band of frequency 2.4 GHz - 2.5 GHz.
- This impedance can be changed between 10 and 200 Ohms, by modifying this distance d.
- the longest strand 122 is opened at its second end 125, and the shortest strand 123 is short-circuited at its second end 126.
- FIG. 13 shows the curve 131 for adapting this antenna, that is to say the R.O.S curve (on the ordinate) as a function of the frequency (on the abscissa).
- the R.O.S is less than 2 between 2.37 GHz and 2.55 GHz. This corresponds to a bandwidth of the order of 8%, which is much higher than the bandwidths obtained with the antennas of the prior art.
- the R.O.S is less than 1.6.
- the Smith diagram in Figure 14 shows the impedance curve 141 of the antenna of Figure 12, between 2 GHz and 3 GHz. Markers 142 and 143 mark the antenna working area (2.4 - 2.5 GHz).
- the invention also relates to any apparatus for transmitting and / or receiving microwave signals equipped with an antenna according to the invention, as illustrated by example by the housing 32 of Figures 3, 7 and 11.
- an apparatus can comprise several antennas, and in particular a transmitting antenna and a transmission antenna reception.
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Description
- L = λ/4 ;
- l = λ/8 ;
- h = λ/25.
lesdits signaux hyperfréquences étant véhiculés entre ladite unité de traitement et ledit élément horizontal par un câble coaxial connecté audit élément horizontal,
ledit élément horizontal comprenant :
- une surface intermédiaire sensiblement rectangulaire, dont une première extrémité correspond à ladite première extrémité dudit élément horizontal ; et
- au moins deux brins sensiblement parallèles entre eux et sensiblement perpendiculaires audit élément vertical, la seconde extrémité de ladite surface intermédiaire correspondant à une première extrémité de chacun desdits brins.
- largeur de ladite première extrémité dudit élément horizontal: de l'ordre de λ/8 ;
- longueur maximale dudit élément horizontal, correspondant à la distance entre ladite première extrémité dudit élément horizontal et l'extrémité la plus éloignée de ladite première extrémité dudit élément horizontal du brin le plus long : de l'ordre de λ/4 ;
- hauteur dudit élément vertical, correspondant à la distance entre ladite première extrémité dudit élément horizontal et ladite masse électrique : de l'ordre de λ/25 ;
- largeur d'au moins un desdits brins : de l'ordre de λ/20.
- les figures 1 et 2 représentent une antenne de l'art antérieur à l'invention dite en F inversé, respectivement en coupe et en perspective. Ces figures ont déjà été discutées en préambule de la présente description ;
- la figure 3 présente un premier mode de réalisation d'une antenne selon l'invention, comprenant deux brins résonants ouverts à l'une de leurs extrémités ;
- les figures 4 à 6 sont trois diagrammes de Smith présentant respectivement la réponse en fréquence correspondant au premier brin de l'antenne de la figure 3, au second brin et à la combinaison des deux brins ;
- la figure 7 illustre un second mode de réalisation d'une antenne selon l'invention, comprenant un brin résonant et un brin court-circuité à ses deux extrémités ;
- les figures 8 et 10 sont trois diagrammes de Smith présentant respectivement les courbes d'impédance correspondant au premier brin de l'antenne de la figure 7, au second brin et à la combinaison des deux brins ;
- la figure 11 présente un troisième mode de réalisation d'une antenne selon l'invention, dont l'impédance des deux brins est ajustable ;
- la figure 12 est une vue de dessus à l'échelle d'un mode de réalisation d'une antenne selon l'invention, dans le cas d'une fréquence de fonctionnement de 2,5 GHz ;
- les figures 13 et 14 présentent respectivement la courbe d'adaptation et la courbe d'impédance correspondant à l'antenne de la figure 12.
- une partie intermédiaire 36, ou base, qui est connectée à l'élément vertical 35 et qui est sensiblement de la même largeur que cet élément vertical ;
- un premier brin 37 s'étendant dans le prolongement de la base 36, le bord extérieur de ce brin 37 correspondant à un premier bord de la base 36 ;
- un second brin 38, parallèle au premier brin 37, dont le bord extérieur correspond au prolongement du second bord de la base 36.
- longueur du plus long brin 37 : l1 = λ/4 ;
- longueur du second brin 38 : l2 légèrement inférieure à λ/4 (par exemple : 9λ/40) ;
- hauteur de l'élément vertical 35 : h = λ/24 ;
- largeur de la base 36 et de l'élément vertical 35 : l = λ/8 ;
- longueur de la base 36 : s = λ/30 ;
- distance entre la connexion 312 et l'élément vertical 35 : d = λ/24;
- largeur des brins 37 et 38 : w1 = w2 = λ/20.
- largeur : l = 15 mm ;
- longueur du brin le plus long 122 : l1 = 30 mm ;
- longueur du brin le plus court 123 : l2 = 27 mm ;
- largeur de la base 124 : s = 4 mm ;
- largeur des brins 122 et 123 : w1 = w2 = 6 mm.
Claims (21)
- Antenne d'émission et/ou de réception de signaux hyperfréquences, comprenant un élément (33) sensiblement plan, dit élément horizontal, et un élément (35) de court-circuit sensiblement perpendiculaire audit élément horizontal (33), dit élément vertical, ledit élément vertical (35) connectant une première extrémité (34) dudit élément horizontal (33) à la masse électrique d'une unité de traitement,
lesdits signaux hyperfréquences étant véhiculés entre ladite unité de traitement et ledit élément horizontal (33) par un câble coaxial (311) connecté audit élément horizontal (33), caractérisée en ce que ledit élément horizontal (33) comprend :une surface intermédiaire (36) sensiblement rectangulaire, dont une première extrémité correspond à ladite première extrémité (34) dudit élément horizontal (33) ; etau moins deux brins (37,38;72;112,115;122,123) sensiblement parallèles entre eux et sensiblement perpendiculaires audit élément vertical, la seconde extrémité de ladite surface intermédiaire (36) correspondant à une première extrémité (313,314) de chacun desdits brins (37, 38). - Antenne selon la revendication 1, caractérisée en ce que lesdits brins (37,38) sont de forme sensiblement rectangulaire.
- Antenne selon l'une quelconque des revendications 1 et 2, caractérisée en ce que lesdits brins (37,38) ont des longueurs différentes.
- Antenne selon l'une quelconque des revendications 1 à 3, caractérisée en ce que lesdits brins (37,38) ont des largeurs sensiblement identiques.
- Antenne selon l'une quelconque des revendications 1 à 4, caractérisée en ce que chacun desdits brins (37,38) est ouvert à son extrémité (313,314) la plus éloignée de ladite première extrémité (34) dudit élément horizontal (33).
- Antenne selon l'une quelconque des revendications 1 à 5, caractérisée en ce que l'extrémité (313) la plus éloignée de ladite première extrémité (34) dudit élément horizontal (33) d'au moins un desdits brins (72) est connectée à la masse électrique de ladite unité de traitement, par l'intermédiaire d'un élément (71) de court-circuit supplémentaire.
- Antenne selon l'une quelconque des revendications 1 à 6, caractérisée en ce que l'extrémité la plus éloignée de ladite première extrémité dudit élément horizontal d'au moins un desdits brins (112,115) est reliée à la masse électrique de ladite unité de traitement, par l'intermédiaire d'une capacité (114,116).
- Antenne selon la revendication 7, caractérisée en ce que l'extrémité la plus éloignée de ladite première extrémité dudit élément horizontal de chacun desdits brins (112,115) est reliée à la masse électrique de ladite unité de traitement, par l'intermédiaire d'une capacité (114,116).
- Antenne selon l'une quelconque des revendications 7 et 8, caractérisée en ce que ladite capacité (114,116) est ajustable, et en ce que ladite unité de traitement comprend des moyens (117) de contrôle de la valeur de ladite capacité ajustable.
- Antenne selon la revendication 11, caractérisée en ce que ladite capacité ajustable (114,116) peut prendre au moins deux valeurs distinctes, une première valeur correspondant au fonctionnement de ladite antenne à une fréquence d'émission de signaux hyperfréquences et une seconde valeur correspondant au fonctionnement de ladite antenne à une fréquence de réception de signaux hyperfréquences.
- Antenne selon l'une quelconque des revendications 1 à 10, caractérisée en ce que ledit câble coaxial (311) présente une impédance sensiblement comprise entre 10 Ohms à 200 Ohms.
- Antenne selon la revendication 11, caractérisée en ce que ladite impédance est sensiblement égale à 50 Ohms.
- Antenne selon l'une quelconque des revendications 1 à 12, caractérisée en ce que la largeur (1) de ladite première extrémité dudit élément horizontal (33) est sensiblement égale à λ/8, λ étant la longueur d'onde desdits signaux hyperfréquences.
- Antenne selon l'une quelconque des revendications 1 à 13, caractérisée en ce que la longueur maximale (11) dudit élément horizontal (33), correspondant à la distance entre ladite première extrémité (34) dudit élément horizontal (33) et l'extrémité (313) la plus éloignée de ladite première extrémité (34) dudit élément horizontal (33) du brin le plus long (37) est sensiblement égale à λ/4, λ étant la longueur d'onde desdits signaux hyperfréquences.
- Antenne selon l'une quelconque des revendications 1 à 14, caractérisée en ce que la hauteur (h) dudit élément vertical (35), correspondant à la distance entre ladite première extrémité (34) dudit élément horizontal (33) et ladite masse électrique est sensiblement égale à λ/25, λ étant la longueur d'onde desdits signaux hyperfréquences.
- Antenne selon l'une quelconque des revendications 1 à 15, caractérisée en ce que la largeur (w1, w2) d'au moins un desdits brins (37,38) est sensiblement égale à λ/20, λ étant la longueur d'onde desdits signaux hyperfréquences.
- Antenne selon l'une quelconque des revendications 1 à 16, caractérisée en ce que la longueur d'onde λ desdits signaux hyperfréquences est comprise entre 100 et 200 mm.
- Antenne selon l'une quelconque des revendications 1 à 17, caractérisée en ce qu'elle comprend deux brins (37,38).
- Antenne selon l'une quelconque des revendications 1 à 18, caractérisé en ce qu'elle est implantée sur un boítier (32) contenant ladite unité de traitement, ladite masse électrique correspondant au blindage électromagnétique dudit boítier (32).
- Antenne selon la revendication 19, caractérisée en ce qu'au moins une partie dudit élément vertical (35) et ledit élément horizontal (33) sont formés dans une même bande d'un matériau conducteur.
- Dispositif d'émission et/ou de réception de signaux hyperfréquences, caractérisé en ce qu'il comprend au moins une antenne (31,111) selon l'une quelconque des revendications 1 à 20.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9215813A FR2699740B1 (fr) | 1992-12-23 | 1992-12-23 | Antenne large bande à encombrement réduit, et dispositif d'émission et/ou de réception correspondant. |
FR9215813 | 1992-12-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0604338A1 EP0604338A1 (fr) | 1994-06-29 |
EP0604338B1 true EP0604338B1 (fr) | 1998-03-04 |
Family
ID=9437187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19930460039 Expired - Lifetime EP0604338B1 (fr) | 1992-12-23 | 1993-12-20 | Antenne large bande à encombrement réduit, et dispositf d'émission/réception correspondant |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0604338B1 (fr) |
DE (1) | DE69317235T2 (fr) |
FR (1) | FR2699740B1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US7183983B2 (en) | 2005-04-26 | 2007-02-27 | Nokia Corporation | Dual-layer antenna and method |
CN104040791A (zh) * | 2012-01-13 | 2014-09-10 | 三星电子株式会社 | 小型天线设备和用于控制所述小型天线设备的方法 |
Families Citing this family (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2718292B1 (fr) * | 1994-04-01 | 1996-06-28 | Christian Sabatier | Antenne d'émission et/ou de réception de signaux électromagnétiques, en particulier hyperfréquences, et dispositif utilisant une telle antenne. |
FR2727250A1 (fr) * | 1994-11-22 | 1996-05-24 | Brachat Patrice | Antenne large bande monopole en technologie imprimee uniplanaire et dispositif d'emission et/ou de reception incorporant une telle antenne |
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GB2345195A (en) * | 1998-12-23 | 2000-06-28 | Nokia Mobile Phones Ltd | Dual band antenna for a handset |
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EP1137097A1 (fr) * | 2000-03-23 | 2001-09-26 | Ascom Systec AG | Structure d'antenne |
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DE10231961B3 (de) | 2002-07-15 | 2004-02-12 | Kathrein-Werke Kg | Niedrig bauende Dual- oder Multibandantenne, insbesondere für Kraftfahrzeuge |
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US7084813B2 (en) | 2002-12-17 | 2006-08-01 | Ethertronics, Inc. | Antennas with reduced space and improved performance |
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GB2406217A (en) * | 2003-09-10 | 2005-03-23 | Itt Mfg Enterprises Inc | Tuneable antenna |
GB0400925D0 (en) | 2004-01-16 | 2004-02-18 | Antenova Ltd | A dual band diversity WLAN antenna system for laptop computers,printers and similar devices |
WO2005081361A1 (fr) * | 2004-02-24 | 2005-09-01 | Sony Ericsson Mobile Communications Ab | Antenne de television pour dispositif de communication portable |
EP1569298B1 (fr) * | 2004-02-24 | 2009-04-29 | Sony Ericsson Mobile Communications AB | Antenne de télévision pour un dispositif communicant portatif |
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US3947850A (en) * | 1975-04-24 | 1976-03-30 | The United States Of America As Represented By The Secretary Of The Navy | Notch fed electric microstrip dipole antenna |
JPS6187434A (ja) * | 1984-10-04 | 1986-05-02 | Nec Corp | 携帯無線機 |
JPS62262502A (ja) * | 1986-05-09 | 1987-11-14 | Yuniden Kk | 無線通信機器用アンテナ |
AT387117B (de) * | 1986-07-10 | 1988-12-12 | Siemens Ag Oesterreich | Sende- und bzw. oder empfangsanordnung fuer tragbare geraete |
JPH0659009B2 (ja) * | 1988-03-10 | 1994-08-03 | 株式会社豊田中央研究所 | 移動体用アンテナ |
AT393054B (de) * | 1989-07-27 | 1991-08-12 | Siemens Ag Oesterreich | Sende- und/oder empfangsanordnung fuer tragbare geraete |
-
1992
- 1992-12-23 FR FR9215813A patent/FR2699740B1/fr not_active Expired - Fee Related
-
1993
- 1993-12-20 EP EP19930460039 patent/EP0604338B1/fr not_active Expired - Lifetime
- 1993-12-20 DE DE1993617235 patent/DE69317235T2/de not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7183983B2 (en) | 2005-04-26 | 2007-02-27 | Nokia Corporation | Dual-layer antenna and method |
CN104040791A (zh) * | 2012-01-13 | 2014-09-10 | 三星电子株式会社 | 小型天线设备和用于控制所述小型天线设备的方法 |
Also Published As
Publication number | Publication date |
---|---|
FR2699740A1 (fr) | 1994-06-24 |
DE69317235D1 (de) | 1998-04-09 |
EP0604338A1 (fr) | 1994-06-29 |
DE69317235T2 (de) | 1998-10-15 |
FR2699740B1 (fr) | 1995-03-03 |
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