EP1196965B1 - Antenne helicoidale - Google Patents

Antenne helicoidale Download PDF

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Publication number
EP1196965B1
EP1196965B1 EP00947810A EP00947810A EP1196965B1 EP 1196965 B1 EP1196965 B1 EP 1196965B1 EP 00947810 A EP00947810 A EP 00947810A EP 00947810 A EP00947810 A EP 00947810A EP 1196965 B1 EP1196965 B1 EP 1196965B1
Authority
EP
European Patent Office
Prior art keywords
spiral
spiral antenna
coplanar line
antenna
reference potential
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
EP00947810A
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German (de)
English (en)
Other versions
EP1196965A1 (fr
Inventor
Thomas Wixforth
Eberhard Gschwendtner
Jean Parlebas
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1196965A1 publication Critical patent/EP1196965A1/fr
Application granted granted Critical
Publication of EP1196965B1 publication Critical patent/EP1196965B1/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
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
    • H01Q1/3275—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
    • H01Q9/27—Spiral antennas

Definitions

  • the invention is based on a spiral antenna according to the species of the main claim.
  • DE 37 39 205 A shows a four-armed spiral antenna whose spiral arms on two separate coaxial lines for feeding and / or receiving Signals are connected.
  • US Pat. No. 3,019,439 shows a four-armed spiral antenna whose arms are attached to a common coaxial line are connected.
  • the spiral antenna according to the invention with the features of Main claim has the advantage that the Spiral arms at their respective inner Spiralarmende to a Coplanar line for feeding and / or receiving Signals are connected.
  • the Coplanar line can be used on feed networks to adjust the Phase angles at the feed points of the spiral antenna or for symmetrization or asymmetry of the dispensed fed electric field and thus Effort can be saved.
  • Another advantage is that the spiral antenna by using the coplanar line both in one first mode for generating an omnidirectional Abstrahl characterizing as well as in a second mode
  • the coplanar line and the spiral antenna on different substrates can be applied.
  • the transition from the Coplanar to the spiral antenna is independent of one possible jump of the dielectric constant. So that can a low-permeability carrier material for the spiral antenna be selected, whereby a good radiation is achieved.
  • a high-permeability carrier material for the Coplanar line can be selected, thereby reducing the Length of coplanar allows and parasitic Radiation from the coplanar line is suppressed, so that the coplanar line from the radiation field of the spiral antenna can be made independently.
  • coplanar line At least partially designed as a taper .. On this Way is not an additional network for customizing the Impedance of the coplanar line to the input impedance of the Spiral antenna required.
  • FIG. 1 shows a three-dimensional view a spiral antenna with a coplanar line.
  • Figure 2 a Top view of a tapered coplanar line
  • Figure 3 a Top view of a spiral antenna with current vectors for an omnidirectional radiation mode
  • Figure 4 a Spiral antenna with current vectors for a radiation mode with Directional radiation
  • Figure 5 with a three symmetrical electric field distribution
  • Figure 6 a Dreitor with asymmetric electric field distribution.
  • Fig. 1, 1 denotes a spiral antenna having a first spiral arm 11, a second spiral arm 12, a third Sprialarm 13 and a fourth spiral arm 14 includes.
  • the first spiral arm 11 a first inner Spiralarmende 5, the second spiral arm 12th a second inner Spiralarmende 6, the third spiral arm 13th a third inner Spiralarmende 7 and the fourth spiral arm 14, a fourth inner Spiralarmende 8 on.
  • the third inner Spiralarmende 7 is due to the perspective Representation not visible in Figure 1, but is in the Top view according to Figure 3 and Figure 4 shown.
  • the four Spiral arms 11, 12, 13, 14 are guided approximately parallel.
  • FIG. 1 denotes a coplanar line with a first inner conductor 21, a first one Reference potential area 22 and a second Reference potential surface 23.
  • the four spiral arms 11, 12, 13, 14 are made of electrically conductive material and on a first carrier material 45 applied.
  • the spiral arms 11, 12, 13, 14 may be made of a metal, for example be formed.
  • the first inner conductor 21, the first Reference potential area 22 and the second Reference potential area 23 are also made of electrical conductive material formed and on a second Carrier material 50 applied.
  • the first carrier material 45 and the second carrier material 50 may be the act same carrier material.
  • the first substrate 45 may be different from the second substrate 50 be.
  • first inner Spiralarmende 5 Via an electrically conductive first bridge 40, the for example, applied to the first substrate 45 is the first inner Spiralarmende 5 with the third inner Spiralarmende 7 electrically connected.
  • first inner Spiralarmende 5 and the third inner Spiralarmende 7 there are the first inner Spiralarmende 5 and the third inner Spiralarmende 7 according to Figure 3 and Figure 4 each other across from.
  • second inner Spiralarmende 6 and the fourth inner Spiralarmende 8 are shown in FIG 3 and FIG 4 facing each other, but without an electric conductive bridge to be interconnected.
  • the Feeding the spiral arms 11, 12, 13, 14 with from the Spiral antenna 1 signals to be radiated via the corresponding inner Spiralarmenden 5, 6, 7, 8 and the Coplanar line 2. According to FIG.
  • the coplanar line is the second arranged perpendicular to the plane of the spiral antenna 1 and in the center of the spiral antenna 1 out. This is the first one Inner conductor 21 electrically conductive with the first bridge 40th connected.
  • the first reference potential area 22 is electrical conductively connected to the second inner Spiralarmende 6.
  • the second reference potential area 23 is electrically conductive connected to the fourth inner Spiralarmende 8.
  • the Coplanar line 2 is used to feed the spiral antenna 1 with can be radiated from the spiral antenna 1 signals and can additionally or alternatively also for the reception of signals be used by the spiral antenna 1.
  • the spiral antenna 1 is called self-complementary, when her spiral arms 11, 12, 13, 14 at a rotation of 45 ° be fully mapped to the areas that precede the Rotation the free spaces between the spiral arms 11, 12, 13, 14 formed. Accordingly, in such a rotation the existing free spaces before the rotation completely Areas shown before the rotation of the spiral arms 11, 12, 13, 14 formed.
  • the axis of rotation goes in both cases through the center of the spiral antenna 1, perpendicular to the plane of the Spiral antenna 1, and is referred to below as the central axis designated.
  • the width of the spiral arms 11, 12, 13, 14 chosen so is that the spiral is self-complementary, then yields an input impedance at the inner Spiralarmenden 5, 6, 7, 8 from 94 ⁇ .
  • the input impedance increases with thinner expectant spiral arms and sink with wider spiral arms, each in proportion to the width of the spaces between the Spiral arms 11, 12, 13, 14.
  • the adaptation of this impedance the conventionally required impedance of 50 ⁇ requires one Impedance transformation, for example, by taping the coplanar line 2 can be achieved.
  • FIG. 2 the coplanar line 2 again shown alone, where same reference numerals same elements as in Fig. 1st mark.
  • Figure 1 and Figure 2 widen the first inner conductor 21, the first reference potential surface 22 and the second reference potential area 23 starting from the Connections to the spiral antenna 1 towards a in Figure 1 and Figure 2, not shown food and / or Receiving network on the spiral antenna 1 facing away Page of the coplanar line 2.
  • the distribution is according to Figure 1 and Figure 2 linear, so that a linear Taptation the coplanar line 2 results. It can, however provided a non-linear tapering of the coplanar line be, for example, an exponential taping.
  • the length, on which the coplanar line 2 is tapped, must at least a quarter of the wavelength of the average operating frequency the spiral antenna 1 amount.
  • the spiral antenna 1 Via the coplanar line 2, the spiral antenna 1 on be fed in a simple way for emitting signals, where two different emission characteristics are generated can be.
  • this is an omnidirectional one Radiation characteristic with a zero point perpendicular to Spiral antenna plane 1.
  • the omnidirectional radiation pattern is particularly advantageous for the mobile Use with terrestrial radio services. To change this is a radiation characteristic with a Main beam direction perpendicular to the plane of the spiral antenna 1, using circular polarization for the Use with satellite-based navigation u. Communication services is particularly suitable.
  • the Spiral antenna 1 can thus be a first or omnidirectional mode with an omnidirectional radiation characteristic and a second or zenith mode with a Radiation characteristic, the main beam direction perpendicular to the plane of the spiral antenna 1 and in hereinafter referred to as zenith radiation realize.
  • the first spiral arm 11 and the third spiral arm 13 are fed in phase.
  • the second spiral arm 12 and the fourth spiral arm 14 are fed in-phase, but out of phase with respect to the first spiral arm 11 and the third spiral arm 13.
  • the current vectors of adjacent spiral arms at their inner spiral arm ends are in each case opposite in phase, ie phase-shifted by 180 °.
  • the spiral antenna 1 radiates from where currents in adjacent spiral arms are in phase. Due to the different path lengths of the spiral arms from a first fixed angle ⁇ o to a second fixed angle ⁇ 1 , the phase difference between the waves running in adjacent spiral arms changes.
  • the two fixed angles ⁇ o , ⁇ 1 are defined in a cylindrical coordinate system whose central axis runs perpendicularly through the center of the spiral antenna 1.
  • the phase difference of 180 ° between adjacent spiral arms at the feed points or at the inner spiral arm ends in the center of the spiral antenna is reduced to 0 ° at a first radius r 1 .
  • Equal phase between adjacent spiral arms can be achieved with a path difference of a wavelength ⁇ or a multiple of the wavelength ⁇ between points symmetrical to the central axis of the spiral antenna 1 opposite points of these spiral arms, since currents at such point symmetrically opposite points regardless of their distance from the center of the spiral antenna 1 in directed opposite directions in space.
  • This path difference corresponds to the distance to be traveled between the opposite points on the adjacent spiral arms.
  • the currents are then directed as shown in Figure 3 in opposite directions in space.
  • said path difference corresponds to the wavelength ⁇ .
  • the propagation speed of the wave on the spiral antenna 1 is indicated by c.
  • the spiral antenna 1 radiates in omnidirectional mode only above the first lower limit frequency f min1 . Due to the fact that currents are directed at point-symmetrically opposite points in opposite spatial directions, the radiation contributions of these currents perpendicular to the plane of the spiral antenna 1 cancel each other and constructively overlap in directions parallel to the plane of the spiral antenna 1. Thus, the omnidirectional radiation mode is achieved.
  • the second spiral arm 12 and the fourth spiral arm 14 are fed with a 180 ° phase difference, while the first spiral arm 11 and the third spiral arm 13 are connected via the first bridge 40 to the first inner conductor 21 of the coplanar line 2 , lie at a fixed zero potential in the middle between the potentials on the second spiral arm 12 and the fourth spiral arm 14.
  • the emission region can be determined in zenith mode. Radiation also occurs in zenith mode where currents in adjacent spiral arms are in phase, even though they are separated by a de-energized further spiral arm. The currents in adjacent spiral arms 12, 14 separated by only the first spiral arm 11 or the third spiral arm 13 are then in phase when the path difference on the second spiral arm 12 and on the fourth spiral arm 14, respectively, is between point symmetrical points ⁇ / 2 or odd Multiple of it amounts.
  • a spiral antenna in shape an Archimedean spiral According to Figures 3 and 4, a spiral antenna in shape an Archimedean spiral.
  • the shape of the Spiral antenna 1, however, is not purely Archimedean Spirals limited.
  • the spiral structure can, for example also logarithmic-periodic.
  • Fig. 5 denotes 55 a so-called three-port with a first goal 60, a second goal 65 and a third goal 70:
  • the three-port 55 comprises a third carrier material 75, the same or different from the first carrier material 45 or to the second carrier material 50 may be.
  • This third carrier material 75 is a second inner conductor 30 and arranged perpendicular thereto a third inner conductor 31, wherein the second inner conductor 30 and the third inner conductor 31 are galvanically separated from each other and thus not in electrically conductive contact each other.
  • the three-goal 55 further includes a third reference potential area 35 and a fourth reference potential area 36.
  • the second Inner conductor 30, the third inner conductor 31, the third Reference potential area 35 and the fourth Reference potential surface 36 are electrically conductive, for example, metallic, formed.
  • the second Inner conductor 30 and the third inner conductor 31 are through the third substrate 75 electrically from the third Reference potential area 35 and the fourth Reference potential surface 36 in the form of the respective Inner conductor 30, 31 surrounding slot isolated.
  • the second Inner conductor 30 divides the Dreittors 55 in a left and a right half up. In the left half runs the third Inner conductor 31 perpendicular to the second inner conductor 30.
  • Die third reference potential area 35 is exclusively in the left half of the three-door 55th
  • the fourth Reference potential area 36 is located exclusively in the right half of the three-goal 55th
  • the first goal 60 of the Dreitors 55 is facing away from the spiral antenna 1 end of Coplanar line 2 connected
  • the second Inner conductor 30 is connected to the first inner conductor 21.
  • the third reference potential area 35 is with the second Reference potential surface 23 connected to the first port 60.
  • the fourth reference potential area 36 is at the first gate 60 with the first reference potential surface 22 connected.
  • the three-port 55 includes the second gate 65, that also out the first inner conductor 30, the third reference potential surface 35 and the fourth reference potential surface 36 is formed and for feeding signals for the omnidirectional Fashion serves.
  • the third gate 70 is formed by the third inner conductor 31 and the third reference potential area 35 and serves to feed in signals for radiation in Zenit mode.
  • metallic bridge 32 are the third Reference potential area 35 and the fourth Reference potential surface 36 electrically conductive with each other connected.
  • metallic bridge 33 is the third Inner conductor 31 with the fourth reference potential surface 36th electrically connected.
  • the second bridge 32 is included from the third bridge 33 toward the second gate 65 back spaced.
  • the generation of the omnidirectional radiation characteristic is achieved in that the electric field distribution on the feeding coplanar line 2 is symmetrical. This corresponds to the so-called "odd mode".
  • This symmetrical electric field distribution is in a snapshot according to Figure 5 by arrows in through the third carrier material 75 formed slots between the third Reference potential area 35 or the fourth Reference potential surface 36 and the second inner conductor 30th shown.
  • the second bridge 32, the third Reference potential area 35 and the fourth Reference potential area 36 on both sides of the second Inner conductor 30 holds at the same potential, it acts not disturbing, because the "Odd Mode" the third Reference potential area 35 and the fourth Reference potential surface 36 from the outset to the same Potential to be laid.
  • the third Inner conductor 31 is thus of the second inner conductor 30th decoupled.
  • FIG. 6 outlines this field distribution as "Even-mode" is called, with appropriate arrows in the slots formed by the third substrate 75 between the third reference potential area 35 or the fourth reference potential surface 36 and the second inner conductor 30. Mark in FIG. 6 same reference numerals same elements as in FIG 5, since it is the same three-goal 55.
  • the Asymetric electric field distribution can be achieved by the described arrangement of the second inner conductor 30, the third inner conductor 31, the second bridge 32 and the third bridge 33 on the three-gate 55 are generated.
  • the generated at the third gate 70 "odd mode" creates a potential difference between the third Inner conductor 31 and the third reference potential surface 35th Die fourth reference potential area 36 is through the third bridge 33 at the same potential as the third inner conductor 31. This creates a potential difference between the third reference potential area 35 and the fourth Reference potential area 36.
  • This potential difference calls the "Even Mode", which is in both directions between the first port 60 and the second port 65 spreads.
  • the second bridge 32 is provided, which is the third Reference potential area 35 and the fourth Reference potential surface 36 holds at the same potential and so that the spread of "even mode" suppressed.
  • the third port 70 is from the second port 65 decoupled. Since the described operation both for the transmission as well as for the reception with the spiral antenna 1 is valid, at the second gate 65 and at the third gate 70 two decoupled signals are received from the different spatial directions on the spiral antenna. 1 to meet.
  • the generation of the omnidirectional mode with the described combined feed takes place frequency independent, while dependent on the position.der second bridge 32 on the generation of the zenith mode certain frequency bands is limited. It can over the Three-door 55 at the same time the omnidirectional fashion and the Zenith mode are fed. Also a simultaneous Receiving is in omnidirectional mode and zenith mode possible with the three-port 55 described. That too Simultaneous sending in one and receiving in the corresponding other fashion is possible with the three-port 55 described.
  • the lower cutoff frequency for the radiation from the Spiral antenna 1 in omnidirectional mode or in zenith mode is also due to the length of the taping on the Coplanar line 2 affected.
  • the lower Cutoff frequency can be lowered when the taping on the Coplanar 2 is extended.
  • the transition from the coplanar line 2 to the spiral antenna 1 is independent of the jump in the dielectric constant the carrier materials. It can be a mapremittives first carrier material 45 for the spiral antenna 1 be selected, whereby good radiation is achieved at simultaneous selection of a high-permeability second Support material 50 for the coplanar line 2, which is a Length reduction of the coplanar line 2 allows and parasitic radiation from the coplanar line 2 suppressed or the coplanar line 2 from the radiation field of Spiral antenna 1 makes independent.
  • the spiral antenna 1 is particularly for the flat installation suitable for the bodywork of a motor vehicle, especially in the roof or in the boot lid of the Motor vehicle, since this aerodynamic and aesthetic installation can be realized. In this way results in a simple, holeless assembly of Spiral antenna in the bodywork of the motor vehicle, thereby Corrosive foci in the body are avoided.

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)

Claims (8)

  1. Antenne hélicoïdale (1) comprenant quatre bras hélicoïdaux (11, 12, 13, 14) conducteurs d'électricité et sensiblement parallèles,
    caractérisée en ce que
    les bras hélicoïdaux (11, 12, 13, 14) sont raccordés à leur extrémité de bras hélicoïdal interne respective (5, 6, 7, 8) à une ligne coplanaire (2) commune pour alimenter et/ou recevoir des signaux, la ligne coplanaire (2) et l'antenne hélicoïdale (1) étant disposées sur le même matériau support.
  2. Antenne hélicoïdale (1) selon la revendication 1,
    caractérisée en ce que
    la ligne coplanaire (2) comprend un conducteur interne (21 ; 30) et au moins une surface de référence (22, 23 ; 35, 36), le conducteur interne (21 ; 30) et l'au moins une surface potentielle de référence (22, 23 ; 35, 36) étant reliés respectivement à deux des quatre extrémités internes (5, 6, 7, 8) des bras hélicoïdaux.
  3. Antenne hélicoïdale (1) selon la revendication 1 ou 2,
    caractérisée en ce que
    la ligne coplanaire (2) est disposée de manière perpendiculaire au plan de l'antenne hélicoïdale (1).
  4. Antenne hélicoïdale (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    la ligne coplanaire (2) est configurée au moins partiellement sous la forme d'un cône.
  5. Antenne hélicoïdale (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    l'antenne hélicoïdale (1) est réalisée sous la forme d'une spirale archimédienne ou d'une spirale logarithmique.
  6. Antenne hélicoïdale (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce qu'
    une alimentation de l'antenne hélicoïdale (1) s'effectue sur la ligne coplanaire (2) avec une répartition de champ électrique symétrique de manière à obtenir une caractéristique de rayonnement omnidirectionnel.
  7. Antenne hélicoïdale (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce qu'
    une alimentation de l'antenne hélicoïdale (1) s'effectue sur la ligne coplanaire (2) avec une répartition de champ électrique asymétrique de manière à obtenir une caractéristique de rayonnement dirigé.
  8. Antenne hélicoïdale (1) selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    l'antenne hélicoïdale (1) est disposée dans ou sur la carrosserie d'un véhicule.
EP00947810A 1999-06-29 2000-06-26 Antenne helicoidale Expired - Lifetime EP1196965B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19929879A DE19929879A1 (de) 1999-06-29 1999-06-29 Spiralantenne
DE19929879 1999-06-29
PCT/DE2000/001991 WO2001003239A1 (fr) 1999-06-29 2000-06-26 Antenne helicoidale

Publications (2)

Publication Number Publication Date
EP1196965A1 EP1196965A1 (fr) 2002-04-17
EP1196965B1 true EP1196965B1 (fr) 2005-02-16

Family

ID=7912996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00947810A Expired - Lifetime EP1196965B1 (fr) 1999-06-29 2000-06-26 Antenne helicoidale

Country Status (6)

Country Link
US (1) US6750828B1 (fr)
EP (1) EP1196965B1 (fr)
JP (1) JP2003521848A (fr)
KR (1) KR100663658B1 (fr)
DE (2) DE19929879A1 (fr)
WO (1) WO2001003239A1 (fr)

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DE10108993B4 (de) 2001-02-23 2004-12-16 Endress + Hauser Gmbh + Co. Kg Vorrichtung zur Bestimmung des Füllstandes eines Füllguts in einem Behälter
DE10110230A1 (de) * 2001-03-02 2002-09-05 Endress & Hauser Gmbh & Co Kg Vorrichtung zur Bestimmung des Füllstandes eines Füllguts in einem Behälter
US7075500B2 (en) * 2004-09-24 2006-07-11 Avocent California Corporation Antenna for wireless KVM, and housing therefor
US7750861B2 (en) * 2007-05-15 2010-07-06 Harris Corporation Hybrid antenna including spiral antenna and periodic array, and associated methods
EP2589107A1 (fr) * 2010-06-30 2013-05-08 BAE Systems Plc. Structure d'antenne
JP2014168108A (ja) * 2011-06-27 2014-09-11 Toyohashi Univ Of Technology 無線送信装置
WO2014078058A1 (fr) * 2012-11-15 2014-05-22 3M Innovative Properties Company Antenne spirale pour systèmes de communications sans fil répartis
US10944157B2 (en) 2019-04-19 2021-03-09 Bose Corporation Multi-arm spiral antenna for a wireless device
KR102096620B1 (ko) * 2019-05-15 2020-04-02 숭실대학교산학협력단 원형 편파 임펄스 방사 장치 및 그 방법
US11525703B2 (en) 2020-03-02 2022-12-13 Bose Corporation Integrated capacitor and antenna

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US3019439A (en) * 1957-09-19 1962-01-30 Martin Marietta Corp Elliptically polarized spiral antenna
DE3739205A1 (de) * 1986-04-12 1989-06-01 Plessey Overseas Spiralantenne

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US3906514A (en) * 1971-10-27 1975-09-16 Harris Intertype Corp Dual polarization spiral antenna
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US4605934A (en) * 1984-08-02 1986-08-12 The Boeing Company Broad band spiral antenna with tapered arm width modulation
GB8717579D0 (en) * 1987-07-24 1987-09-03 Gen Electric Co Plc Protective electric fuses
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ES2021522A6 (es) * 1990-04-20 1991-11-01 Consejo Superior Investigacion Radiador microbanda para polarizacion circular libre de soldaduras y potenciales flotantes.
JPH1075114A (ja) * 1996-08-29 1998-03-17 Nippon Dengiyou Kosaku Kk ヘリカルスパイラルアンテナ
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US3019439A (en) * 1957-09-19 1962-01-30 Martin Marietta Corp Elliptically polarized spiral antenna
DE3739205A1 (de) * 1986-04-12 1989-06-01 Plessey Overseas Spiralantenne

Also Published As

Publication number Publication date
DE50009557D1 (de) 2005-03-24
DE19929879A1 (de) 2001-01-18
US6750828B1 (en) 2004-06-15
EP1196965A1 (fr) 2002-04-17
WO2001003239A1 (fr) 2001-01-11
JP2003521848A (ja) 2003-07-15
KR100663658B1 (ko) 2007-01-03
KR20020013595A (ko) 2002-02-20

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