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WO2019078303A1 - Couvercle et dispositif d'antenne de type à ailette montée sur véhicule - Google Patents

Couvercle et dispositif d'antenne de type à ailette montée sur véhicule Download PDF

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Publication number
WO2019078303A1
WO2019078303A1 PCT/JP2018/038866 JP2018038866W WO2019078303A1 WO 2019078303 A1 WO2019078303 A1 WO 2019078303A1 JP 2018038866 W JP2018038866 W JP 2018038866W WO 2019078303 A1 WO2019078303 A1 WO 2019078303A1
Authority
WO
WIPO (PCT)
Prior art keywords
radome
antenna device
fin type
vehicle
type antenna
Prior art date
Application number
PCT/JP2018/038866
Other languages
English (en)
Japanese (ja)
Inventor
智和 園嵜
夏比古 森
里路　文規
柴原　克夫
Original Assignee
Ntn株式会社
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 Ntn株式会社 filed Critical Ntn株式会社
Priority to CN201880061808.7A priority Critical patent/CN111108647B/zh
Priority to US16/649,168 priority patent/US11133579B2/en
Priority to EP18868445.0A priority patent/EP3700012A4/fr
Priority claimed from JP2018196689A external-priority patent/JP7110058B2/ja
Publication of WO2019078303A1 publication Critical patent/WO2019078303A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/02—Arrangements for de-icing; Arrangements for drying-out ; Arrangements for cooling; Arrangements for preventing corrosion
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/40—Radiating elements coated with or embedded in protective material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome

Definitions

  • the present invention includes, for example, a cover for an electromagnetic / electromagnetic wave generator attached to a wall surface of a house, a cover such as a radome for an electromagnetic / electromagnetic wave generator attached on a roof of a vehicle, and a cover such as a radome
  • the present invention relates to a fin type antenna device.
  • various antennas for receiving various radio waves are attached at suitable locations.
  • an antenna for AM / FM reception, an antenna for satellite radio reception, etc. is mounted on the roof of the vehicle (see, for example, Patent Document 1 below), and a keyless entry antenna is mounted on each door (for example, Reference 2).
  • the present inventors examined incorporating a plurality of (for example, four or more) antennas into a fin-type antenna device provided on the roof of a vehicle.
  • the cables connecting the respective antennas and the control unit can be integrated into one cable, so that the weight of the vehicle can be reduced and fuel consumption can be reduced.
  • the circuit board provided in the cover such as the radome tends to generate heat, and the electronic components on the circuit board deteriorate There is a risk of becoming a lifetime.
  • the cover such as the radome since the temperature in the cover such as the radome becomes high, the cover such as the radome may be deteriorated early.
  • an object of the present invention to improve the durability of an on-vehicle fin type antenna device provided with a cover such as a radome housing an electromagnetic / electromagnetic wave generator such as a plurality of antennas inside and a cover such as a radome inside.
  • the present invention is a cover formed as a housing that protects an electromagnetic / electromagnetic wave generator and can transmit electromagnetic / electromagnetic waves generated from the electromagnetic / electromagnetic wave generator, and the housing Provided is a cover formed of a resin material whose base resin is a crystalline resin and whose deflection temperature under load is 100 ° C. or higher.
  • the present invention is a radome that internally accommodates a plurality of antenna portions, a circuit board electrically connected to the plurality of antenna portions, and the plurality of antenna portions and the circuit board
  • An in-vehicle fin type antenna device wherein the radome is formed of a resin material having a crystalline resin as a base resin and a deflection temperature under load of 100 ° C. or more.
  • the cover such as radome by forming the cover such as radome with a resin material having a crystalline resin excellent in heat resistance as a base resin and having a deflection temperature under load of 100 ° C. or more, the cover such as radome at high temperature Since the strength is ensured, sufficient durability can be obtained even when an electromagnetic / electromagnetic wave generator such as a plurality of (particularly, four or more) antenna units is housed inside a cover such as a radome or even in the summer sun.
  • the deflection temperature under load is measured according to, for example, JIS K 7191-1, ASTM-D648, ISO75-1, and ISO75-2.
  • the conventional keyless entry antenna is dispersedly provided on the vehicle door etc. (specifically, right and left front side doors, automatic slide doors, back doors, trunk hoods, etc.), the number of cables extending from each antenna In particular, the weight is increased. Therefore, if the keyless entry antenna is integrated in the radome of the in-vehicle fin type antenna device, the number of cables is greatly reduced, and the weight reduction effect is large.
  • each antenna unit when a plurality of antenna units are accommodated in the radome, the antenna units are close to each other, so that interference between transmission and reception radio waves (electromagnetism / electromagnetic waves) of each antenna unit becomes a problem. Therefore, it is necessary to accurately arrange each antenna unit at a predetermined position (in particular, the relative position between the antenna units) so that interference of radio waves does not occur. There is a risk of misalignment. Therefore, if a filler is enclosed inside the radome and a plurality of antenna units are integrally held by this filler, relative positional deviation of each antenna unit can be prevented, and interference between transmission and reception radio waves of each antenna unit can be avoided. It can be prevented reliably.
  • the filler since the filler is in contact with the antenna portion, it is preferable that the filler does not affect the characteristics of the antenna portion (e.g., dielectric constant, dielectric loss tangent, etc.).
  • foam materials such as urethane, are mentioned, for example.
  • the dielectric loss tangent of the filler is preferably, for example, 0.02 or less.
  • the dielectric loss tangent of the resin material which forms covers, such as a radome is 0.01 or less, for example.
  • the dielectric loss tangent is determined, for example, based on the measurement method defined in ASTM D150, IEC 60250, JIS C 2138, and the most suitable measurement method is selected depending on the frequency, but the value does not differ depending on any measurement method. .
  • crystalline resin used as a base resin of resin material which forms covers such as a radome
  • PMP polymethylpentene
  • LCP liquid crystal polymer
  • PPS polyphenylene sulfide
  • PBT polybutylene terephthalate
  • PMP or LCP is particularly preferred. Since PMP has a very low density, it is possible to reduce the weight of covers such as radome.
  • LCP has the property that the orientation is increased and the strength is increased by thinning, and therefore weight reduction by thinning can be achieved while securing the strength.
  • base resin of the resin material which forms covers such as a radome
  • LCP which has a repeating structural unit shown, for example to following Chemical formula 1.
  • This LCP is a wholly aromatic polyester LCP, and is particularly excellent in heat resistance.
  • n 0 or 1
  • x, y and z each represent an arbitrary integer.
  • base resin of the resin material which forms covers is LCP which has a repeating structural unit shown, for example to following Chemical formula 2.
  • the LCP has appropriate heat resistance that can be used as a cover such as a radome, and has electrical characteristics such as a preferable dielectric tangent value that can be used as a cover such as a radome.
  • x and y each represent an arbitrary integer.
  • a waterproof air-permeable filter may be provided on the radome of the above-described on-vehicle fin type antenna device to restrict the passage of water and allow the passage of air.
  • this waterproof ventilation filter the heat in the radome can be released to the outside while preventing the water and dust from entering the radome, so the temperature rise in the radome is suppressed and the performance deterioration of the antenna unit is prevented. be able to.
  • a vehicle-mounted fin type antenna device provided with a cover such as a radome housing an electromagnetic / electromagnetic wave generating device such as a plurality of antenna units inside and a cover such as a radome Can be enhanced.
  • FIG. 4 is a cross-sectional view taken along the line XX in FIG.
  • the in-vehicle fin type antenna device 1 shown in FIG. 1 and FIG. 2 is housed in a base 2 mounted on the roof of a vehicle, a fin type radome (cover) 3 mounted on the base 2 and a space in the radome 3
  • the plurality of antenna units (electromagnetic / electromagnetic wave generator) and the circuit board 4 electrically connected to these are mainly provided.
  • an on-vehicle fin type antenna device 1 having four antenna units 5a to 5d is shown.
  • the base 2 has a flat plate shape, and is formed of, for example, a resin.
  • a fixing portion 2a for fixing to the roof of the vehicle is provided on the lower surface of the base 2.
  • the fixing portion 2a is made of, for example, a bolt, and the bolt is inserted into a through hole provided in the roof of the vehicle, and a nut is fastened to the bolt. It is fixed on the roof.
  • the base 2 is provided with a through hole 2b, and a cable 8 for connecting to a control unit (not shown) provided in the vehicle is inserted through the through hole 2b.
  • the radome 3 has a fin-shaped outer shape and has an internal space opened downward.
  • the base 2 is fixed to the lower opening of the radome 3 via a sealing member (not shown) such as a packing.
  • the radome 3 is formed of a resin material, and the surface (the outer surface) is coated.
  • the radome 3 has heat resistance (heat from direct sunlight and heat transfer from the body), weather resistance (wind and dust), UV resistance (direct sunlight), chemical resistance (detergent, wax, coating agent, etc.), strength Various characteristics are required, such as (for car wash with an automatic car wash machine, foreign object collision such as a bag or bag). Among these, heat resistance and strength are important, and in particular, it is necessary to select a material of radome 3 in consideration of strength at high temperature.
  • a crystalline resin excellent in heat resistance is used as the base resin of the resin material forming the radome 3.
  • the type and blending amount of the base resin and the additive were set such that the deflection temperature under load was 100 ° C. or more, preferably 150 ° C. or more.
  • specific examples of the material will be described.
  • any of PMP polymethylpentene
  • LCP liquid crystal polymer
  • PAS polyarylene sulfide
  • PPS polyphenylene sulfide
  • PBT polybutylene terephthalate
  • PMP is excellent in oxygen permeability and chemical resistance. Since PMP has a low density, weight reduction of the radome 3 is possible. Since PMP does not hydrolyze, it has high water resistance and steam resistance. PMP has a high melting point of about 220 to 240 ° C. (eg, 235 ° C.), and for example, it has a high temperature deflection temperature of 100 ° C. or higher measured based on the test method of ASTM-D648 (0.45 MPa). Suitable for use in the environment.
  • PMP has small frequency dependence of dielectric characteristics.
  • the dielectric loss tangent (tan ⁇ ) of PMP measured based on the test method of ASTM-D150 is 0.0003 or less for both 10 kHz and 1 MHz, and exhibits a low value of 0.0008 even at 10 GHz.
  • the resin material containing PMP or PMP also has electrical characteristics that can be sufficiently used as the radome 3 of the in-vehicle fin type antenna device 1.
  • the dielectric loss tangent (tan ⁇ ) of a phenol resin measured based on the test method of ASTM-D150 is as high as, for example, 0.08 to 0.50 at 50 Hz to 1 MHz.
  • Such a material is not preferable as a resin material of the radome 3 of the in-vehicle fin type antenna device 1.
  • the dielectric loss tangent (tan ⁇ ) of the resin material forming the radome 3 of the in-vehicle fin type antenna device 1 is more preferably, for example, 0.001 or less under any measurement method and frequency condition.
  • x represents any integer.
  • LCP is excellent in heat resistance, flame retardancy, chemical resistance, gas barrier property, and vibration damping property, and has high strength and high elastic modulus.
  • LCP has a low coefficient of thermal expansion and is excellent in dimensional stability. Since LCP has the property that the orientation is enhanced and the strength is enhanced by thinning, the weight reduction can be achieved by thinning the radome 3 while securing the strength.
  • LCP examples include those having repeating structural units represented by the following chemical formulas 4 to 6. From the viewpoint of excellent heat resistance, the wholly aromatic polyester LCP represented by the chemical formula 4 is particularly preferable. Since LCP exhibits liquid crystallinity in a molten state, it has good fluidity at the time of molding, and can be easily molded even if the radome 3 is thin.
  • n 0 or 1
  • x, y and z each represent an arbitrary integer.
  • thermotropic liquid crystal polymer that can be melt-formed and shows anisotropy when it is melt-oriented exhibits an orientation characteristic unique to liquid crystals, and as a result of exhibiting self-reinforcing properties, its heat deformation resistance is high and inorganic
  • a reinforcing agent such as a heat resistant fibrous filler or a powdery filler of the system also contributes to the improvement of the heat distortion resistance at a small amount.
  • the resin material in which glass fiber etc. is added to LCP shown in the above-mentioned chemical formula 4 has a high value of deflection temperature under load measured based on the test method of ASTM-D 648 (1.8 MPa), for example, 240 ° C. or more Indicates
  • This resin material is also excellent in electrical properties such as dielectric properties, and for example, the dielectric loss tangent (tan ⁇ ) measured based on the test method of ASTM-D150 is as low as 0.003 to 0.004 at 1 GHz.
  • the resin material in which glass / inorganic substance, glass fiber, etc. is added to LCP shown in the above-mentioned chemical formula 5 has a deflection temperature under load measured based on the test method of ISO75-1, 2 (1.8 MPa). It shows a high value of 235 ° C or more.
  • This resin material is also excellent in electrical properties such as dielectric properties.
  • the dielectric loss tangent (tan ⁇ ) measured based on the test method of IEC 60250 is as low as 0.01 at 1 kHz and 0.01 at 1 MHz. Indicates a value.
  • the relative dielectric constant is a ratio of the capacitance Cx of the capacitor made of the insulating material to the capacitance C0 when the space between the electrodes is filled with a vacuum with the same electrode configuration.
  • the dielectric constant is a product of the relative dielectric constant ⁇ r of the insulating material and the dielectric constant ⁇ 0 of a vacuum.
  • the dielectric loss tangent is read from an LCR meter which is a measuring device.
  • the LCR meter is a device that measures mainly the parameters of passive components, such as L (inductance), C (capacitance), R (resistance), Z (impedance), and the like in an alternating current.
  • PAS such as PPS is excellent in heat resistance, cold resistance, chemical resistance, creep resistance, weather resistance and fatigue characteristics. PAS such as PPS is also excellent in flame retardancy and heat shock resistance. PAS such as PPS is also excellent as an insulating material, and even if the frequency changes, there is almost no influence on the dielectric constant, dielectric loss tangent or the like of each of the antenna parts 5a to 5d.
  • PAS is a synthetic resin generally represented by the following formula (1).
  • Ar in the following formula (1) is an arylene group, and examples of Ar include those represented by the following formulas (2) to (7).
  • X represents a halogen or CH 3 selected from F, Cl and Br, and m represents an integer of 1 to 4.
  • the content of the repeating unit (-Ar-S-) in the PAS is preferably 70 mol% or more, and more preferably 90 to 100 mol%.
  • the content rate of the repeating unit as referred to herein means the ratio of the repeating unit to 100% of all the monomers constituting the PAS.
  • Known methods can be used to obtain PAS. For example, reaction of halogen substituted aromatic compound with alkali sulfide (Japanese Patent Publication No. 44-27671), condensation reaction of aromatic compound with sulfur chloride in the presence of Lewis acid catalyst (Japanese Patent Publication No. 46-27255), or And a condensation reaction of thiophenols in the presence of an alkali catalyst or a copper salt (US Pat. No. 3,274,165).
  • sodium sulfide and p-dichlorobenzene are reacted in an amide solvent such as N-methyl pyrrolidone, dimethylacetamide or the like, or in a sulfone solvent such as sulfolane.
  • the components represented by the following formulas (8) to (12) can be included in PAS to be used as copolymerization components.
  • the addition amount of the components represented by the following formulas (8) to (12) can be less than 30 mol%, preferably less than 10 mol%, to 1 mol% or more with respect to 100% of all the monomers constituting the PAS. .
  • the PAS be of the cross-linked type or that it has partial cross-linking, ie partial cross-linking.
  • PASs having partial cross-linking are also called semi-crosslinked or semi-linear PASs.
  • the crosslinkable PAS increases the molecular weight to the required level by performing heat treatment in the presence of oxygen during the manufacturing process.
  • the crosslinkable PAS has a two-dimensional or three-dimensional crosslink structure in which some of the molecules mutually crosslink oxygen. Therefore, compared with the linear type PAS described below, it is excellent in maintaining high rigidity even in a high temperature environment, reducing creep deformation and being hard to relieve stress.
  • the cross-linked or semi-cross-linked PAS is superior in heat resistance, creep resistance and the like to the linear (non-crosslinked) PAS. Therefore, there are advantages such as less generation of burrs in injection molded articles as compared with linear type PAS.
  • linear type PAS since there is no heat treatment step in the production process, no cross-linked structure is contained in the molecule, and the molecule is linear in one dimension.
  • linear type PAS is characterized in that its rigidity is lower than that of crosslinked type PAS, and its toughness and elongation are somewhat high.
  • linear type PAS is excellent in the mechanical strength from a specific direction.
  • the linear type PAS has less moisture absorption, it has an advantage such as less dimensional change even in a high temperature and high humidity atmosphere.
  • linear type PAS can adjust a molecular weight, for example, and can make melt viscosity low.
  • filler such as fibrous filler such as glass fiber, whisker filler such as potassium titanate, flake filler such as mica, powder filler such as metal powder is added to linear type PAS. Even for mixed resin compositions, the injection moldability is not significantly impaired.
  • a method of forming crosslinks or forming partial crosslinks in PAS for example, a method of polymerizing a polymer having a low degree of polymerization and then heating in an atmosphere where air is present, or adding a crosslinking agent or a branching agent There is a way to
  • the apparent melt viscosity of PAS is preferably in the range of 1000 poise to 10000 poise. If the apparent melt viscosity is too low (less than 1000 poises), the strength of the radome 3 may be reduced. On the other hand, if the apparent melt viscosity is too high (more than 10000 poise), the formability may be reduced.
  • the melt viscosity of the crosslinkable PAS can be 1000 to 5000 poise, preferably 2000 to 4000 poise. If the melt viscosity is too low, mechanical properties such as creep resistance may deteriorate in a high temperature range of 150 ° C. or higher. In addition, when the melt viscosity is too large, the formability may be reduced.
  • the measurement of melt viscosity may be carried out with an enhanced flow tester under the conditions of a measurement temperature of 300 ° C, an orifice with a hole diameter of 1 mm, a length of 10 mm, a measurement load of 20 kg / cm 2 and a preheating time of 6 minutes. it can.
  • the thermal stability of PAS having a partial cross-linkage is that the rate of change in melt viscosity after 6 minutes and after 30 minutes in the above melt viscosity measurement conditions is in the range of -50% to 150%. Is preferred.
  • the molecular weight of PAS is preferably 13,000 to 30,000 in number average molecular weight in consideration of injection moldability, and more preferably 18,000 to 25,000 in number average molecular weight in consideration of fatigue resistance and high molding accuracy. If the number average molecular weight is less than 13,000, the molecular weight is too low, and fatigue resistance tends to be poor. On the other hand, when the number average molecular weight exceeds 30,000, although the fatigue resistance is improved, in order to achieve the required mechanical strength such as impact strength, for example, a fibrous filler such as glass fiber may be contained. It may be necessary. For example, when 10 to 50% by mass of glass fiber is contained, the melt viscosity at the time of molding exceeds the above upper limit (10000 poise).
  • a number average molecular weight here shows the number average molecular weight in polystyrene conversion measured by gel permeation chromatography (GPC method).
  • the melting point of PAS is, for example, about 220 to 290 ° C., preferably 280 to 290 ° C. In general, since the melting point of PPS is about 285 ° C., it is preferable to use PPS as PAS. In addition, since PAS has low water absorbency, the dimensional change due to water absorption of the radome 3 using PAS as a base material is reduced.
  • the radome 3 having the PAS as a base material is excellent in creep resistance, chemical resistance and the like in the radome 3 and has excellent stability in which dimensional change due to water absorption is reduced.
  • the deflection temperature under load measured based on the test method of ISO 75-1, 2 (1.8 MPa) is, for example, 105 ° C. or higher.
  • the deflection temperature under load measured based on the test method of ISO 75-1, 2 (1.8 MPa) is, for example, 275 ° C.
  • PAS such as PPS is also excellent in electrical characteristics such as dielectric characteristics.
  • a resin material having PAS such as PPS exhibits a low dielectric loss tangent (tan ⁇ ) of 0.001 to 0.008, which is measured based on the test method of IEC 60250. Specifically, the dielectric loss tangent (tan ⁇ ) of a resin material having PAS such as PPS exhibits a low value of 0.001 even at 1 MHz.
  • the resin material in which 40 wt% of glass fiber is added to PAS such as PPS has a low dielectric loss tangent (tan ⁇ ) of 0.001 at 1 KHz and 0.002 at 1 MHz as measured according to the test method of IEC 60250.
  • the resin material containing PAS such as PPS also has electrical characteristics that cause no problem even when used as the radome 3 of the in-vehicle fin type antenna device 1.
  • PBT has good dimensional stability, thermal stability, and chemical resistance (acid resistance, alkali resistance). PBT has well-balanced physical properties including electrical characteristics.
  • a resin material with 15 wt% of glass fiber added to PBT has a deflection temperature under load of 200 ° C. measured based on the test method of ISO 75-1, 2 (1.8 MPa).
  • the resin material containing 15 wt% of glass fiber added to PBT exhibits a dielectric loss tangent (tan ⁇ ) of 0.002 at 50 Hz, which is measured based on the test method of ASTM-D150.
  • Resin materials containing PBT show less change in dielectric properties over a wide temperature range, and are also less affected by frequency.
  • x represents any integer.
  • the additive for example, one or more selected from fibrous fillers such as glass fibers, whisker fillers such as potassium titanate, scale fillers such as mica, and powder fillers such as metal powder It can be used.
  • the radome 3 may be formed of a resin material consisting only of the base resin without blending the additive.
  • the circuit board 4 is fixed on the base 2 via the pedestal 9.
  • a circuit pattern (not shown) including an amplifier 4a and a control chip 4b (filter) is formed.
  • the antenna portions 5a to 5d are connected to one end of the circuit pattern via the conductive member 10, and the cable 8 is connected to the other end of the circuit pattern.
  • the antenna units 5a to 5d transmit and receive radio waves of different frequency bands (including only reception or transmission only).
  • an electromagnetic / electromagnetic wave generator such as an antenna for (registered trademark) and an antenna for ETC are accommodated in the radome 3.
  • These electromagnetic / electromagnetic wave generating devices are supposed to mainly transmit / receive electromagnetic / electromagnetic waves other than visible light, for example.
  • an electromagnetic / electromagnetic wave generator capable of transmitting / receiving electromagnetic / electromagnetic waves including visible light May be used.
  • Each of the antenna portions 5a to 5d has flat base bodies 6a to 6d and antenna patterns 7a to 7d provided on the surfaces of the respective base bodies 6a to 6d.
  • the substrates 6a to 6d are formed of a dielectric, and are formed of, for example, a resin or a ceramic.
  • the antenna patterns 7a to 7d are formed of thin conductive plates (for example, metal plates), and are attached to the bases 6a to 6d. In the present embodiment, the antenna patterns 7a to 7d are provided on the surfaces of the flat substrates 6a to 6d.
  • the antenna patterns 7a to 7d of the antenna units 5a to 5d have different shapes. One end of each of the antenna patterns 7a to 7d is electrically connected to the circuit pattern on the circuit board 4 through the conductive member 10.
  • all of the flat antenna portions 5a to 5d are erected, but the present invention is not limited thereto.
  • a part of the antenna portions 5a to 5d may be placed flat (arranged parallel to the base 2) It is also good.
  • the bases 6a to 6d of the antenna units 5a to 5d have the same shape, but the shapes and sizes of the bases 6a to 6d may be different.
  • flat antenna portions 5a to 5d are provided upright. Specifically, the bases 6a to 6d of the antenna units 5a to 5d are fixed to the support 11 erected on the base 2, and the antenna units 5a to 5d are provided radially around the support 11. In the illustrated example, the four flat antenna portions 5a to 5d are arranged in a cross shape in plan view. The plurality of antenna units 5a to 5d may be fixed to the radome 3 side.
  • the cables 8 connecting the antenna units 5a to 5d and the control unit provided on the vehicle body side are combined.
  • the signals received by the respective antenna units 5a to 5d are transmitted to the control unit via the common cable 8.
  • the weight of the cable is reduced to reduce the weight of the vehicle, thereby reducing fuel consumption.
  • the control chip 4b of the circuit board 4 connected to the antenna units 5a to 5d easily generates heat.
  • the inside of radome 3 may become hot.
  • the heat resistance of the radome 3 is particularly important.
  • the radome 3 is formed of a resin material having a crystalline resin excellent in heat resistance as a base resin, and the composition of this resin material has a deflection temperature under load of 100 ° C. or higher. It was set to be Thereby, the heat resistance of the radome 3, in particular, the strength at high temperature is ensured, and therefore, the durability is excellent even when a plurality of (particularly, four or more) antenna portions are accommodated inside.
  • a filler 12 is enclosed in the radome 3.
  • the filler 12 is provided to be in contact with all the antenna units 5a to 5d housed in the radome 3, and holds all the antenna units 5a to 5d in an integrated manner.
  • the whole of each of the antenna portions 5a to 5d is covered with the filler 12, and in the illustrated example, the entire inner space of the radome 3 is filled with the filler 12.
  • the filling material 12 may be partially provided inside the radome 3, and all the antenna parts 5a to 5d may be held by the filling material 12. At this time, the filler 12 may be in partial contact with each of the antenna portions 5a to 5d.
  • the respective antenna units 5a to 5d are close to each other, which may cause interference between radio waves transmitted and received by the respective antenna units 5a to 5d. is there.
  • the flat plate antenna portions 5a to 5b are erected and arranged in a cross shape in plan view to prevent interference between transmission and reception radio waves of the antenna portions 5a to 5d.
  • the filling material 12 is enclosed inside the radome 3, and all the antenna parts 5a to 5d are integrally held by the filling material 12, so that the respective antenna parts 5a to 5 It prevents position shift of 5d.
  • the filler 12 is preferably made of a material that hardly affects the characteristics (dielectric constant, dielectric loss tangent, etc.) of the antenna units 5a to 5d because the filler 12 contacts the antenna units 5a to 5d as described above.
  • the foam material can be suitably used as the filler 12 because the relative dielectric constant is close to that of air and the characteristics of the antenna portions 5a to 5d are less affected.
  • a foam material a chemical foam material or a physical foam material can be used. Chemical blowing agents are easy to handle because the decomposition temperature is around 140-160 ° C. Physical blowing agents have low thermal conductivity and are excellent in thermal insulation.
  • the filler 12 can be formed of, for example, a urethane foam.
  • the relative permittivity ( ⁇ ) of the urethane foam is set to 4.0 to 7.5.
  • the dielectric loss tangent (tan ⁇ ) of the urethane foam is, for example, a small value of 0.015 to 0.017 at 60 Hz.
  • the above-described on-vehicle fin-type antenna device 1 is manufactured, for example, through the following procedure. First, the antenna units 5a to 5d and the circuit board 4 are attached to the base 2. Thereafter, the base and the radome 3 are fixed, and the antenna units 5a to 5d and the like are accommodated inside. Thereafter, the filling material 12 is injected into the radome 3, and the antenna parts 5a to 5d are integrally held by the filling material 12. The injection of the filler 12 is performed, for example, from an inlet (not shown) provided in the base 2. After the filler 12 is injected, the inlet of the base 2 is sealed by a sealing member (not shown). The filler 12 may be injected through the hole originally provided in the base 2.
  • the manufacturing method of the fin-type antenna apparatus 1 for vehicles is not restricted above, For example, after attaching a several antenna part and a circuit board to the base 2, hold
  • the radome 3 may be provided with a waterproof ventilation filter 20.
  • the waterproof air-permeable filter 20 is provided at a position where the inside and the outside of the radome 3 communicate with each other.
  • the waterproof air-permeable filter 20 is disposed in the through hole 3 a provided in the radome 3.
  • a waterproof air-permeable filter 20 is provided on the side surface (rear surface) of the radome 3 on the vehicle rear side.
  • the waterproof ventilation filter 20 regulates the passage of water and allows the passage of air.
  • a porous film having innumerable fine pores can be used as the waterproof air-permeable filter 20.
  • a fluororesin-based porous film, a fluororesin nanofiber nonwoven fabric, or the like can be used.
  • the temperature rise in the radome 3 can be suppressed.
  • the pressure caused by the temperature difference between the inside and outside of the radome 3 can be suppressed, and the performance deterioration of the antenna portions 5a to 5d due to this pressure can be prevented.
  • external water and dust are blocked by the waterproof air-permeable filter 20 so that they do not intrude into the inside of the radome 3.
  • vehicle-mounted fin type antenna apparatus 1 which has four antenna part 5a-5d
  • vehicle part which has two to three antenna parts, or five or more
  • present invention can also be applied to a fin-type antenna device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Aerials (AREA)

Abstract

L'invention concerne un dispositif d'antenne de type à ailette montée sur véhicule comprenant : une pluralité de parties d'antenne 5a-5d ; une carte de circuit imprimé 4 connectée électriquement à la pluralité de parties d'antenne 5a -5 d ; et un radôme 3 logeant la pluralité de parties d'antenne 5a -5 d et la carte de circuit imprimé 4 à l'intérieur de celui-ci. Le radôme 3 est formé à partir d'un matériau de résine utilisant une résine cristalline en tant que résine de base et ayant une température de déviation sous charge supérieure ou égale 100 °C.
PCT/JP2018/038866 2017-10-18 2018-10-18 Couvercle et dispositif d'antenne de type à ailette montée sur véhicule WO2019078303A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201880061808.7A CN111108647B (zh) 2017-10-18 2018-10-18 壳体及车载用鳍形天线装置
US16/649,168 US11133579B2 (en) 2017-10-18 2018-10-18 Cover and vehicle-mounted fin type antenna device
EP18868445.0A EP3700012A4 (fr) 2017-10-18 2018-10-18 Couvercle et dispositif d'antenne de type à ailette montée sur véhicule

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2017201930 2017-10-18
JP2017-201930 2017-10-18
JP2018-173742 2018-09-18
JP2018173742 2018-09-18
JP2018-196689 2018-10-18
JP2018196689A JP7110058B2 (ja) 2017-10-18 2018-10-18 カバーおよび車載用フィン型アンテナ装置

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WO2019078303A1 true WO2019078303A1 (fr) 2019-04-25

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021241089A1 (fr) * 2020-05-26 2021-12-02 豊田合成株式会社 Garniture de véhicule
WO2022114161A1 (fr) * 2020-11-27 2022-06-02 株式会社ヨコオ Dispositif d'antenne embarqué

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US3274165A (en) 1965-05-10 1966-09-20 Dow Chemical Co Method for preparing linear polyarylene sulfide
JPS4427671B1 (fr) 1964-11-07 1969-11-17
JPS4627255B1 (fr) 1967-04-25 1971-08-07
JPH0235803A (ja) * 1988-07-26 1990-02-06 Matsushita Electric Works Ltd 移動体搭載用アンテナ装置
JP2009273104A (ja) * 2008-05-06 2009-11-19 Kojun Seimitsu Kogyo Kofun Yugenkoshi 金属部材とプラスチック部材との接合構造、その製造方法及び電子装置の筐体
JP2012080388A (ja) * 2010-10-04 2012-04-19 Mitsumi Electric Co Ltd アンテナ装置
JP2012198537A (ja) * 2011-03-10 2012-10-18 Ntn Corp 光コネクタ部材およびその製造方法
JP2015516786A (ja) * 2012-05-16 2015-06-11 コンチネンタル オートモーティヴ ゲゼルシャフト ミット ベシュレンクテル ハフツングＣｏｎｔｉｎｅｎｔａｌ Ａｕｔｏｍｏｔｉｖｅ ＧｍｂＨ 送信アンテナ部材と受信アンテナ部材とを備えたアンテナモジュール
JP2016025477A (ja) 2014-07-18 2016-02-08 株式会社ヨコオ 車載用アンテナ装置
JP2016036104A (ja) * 2014-08-04 2016-03-17 富士通株式会社 無線通信モジュール
JP2016211358A (ja) 2015-04-30 2016-12-15 カルソニックカンセイ株式会社 車両用キーレスエントリーシステムおよび車載装備の制御方法
WO2017086377A1 (fr) * 2015-11-19 2017-05-26 日本電気株式会社 Dispositif de communication sans fil

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4427671B1 (fr) 1964-11-07 1969-11-17
US3274165A (en) 1965-05-10 1966-09-20 Dow Chemical Co Method for preparing linear polyarylene sulfide
JPS4627255B1 (fr) 1967-04-25 1971-08-07
JPH0235803A (ja) * 1988-07-26 1990-02-06 Matsushita Electric Works Ltd 移動体搭載用アンテナ装置
JP2009273104A (ja) * 2008-05-06 2009-11-19 Kojun Seimitsu Kogyo Kofun Yugenkoshi 金属部材とプラスチック部材との接合構造、その製造方法及び電子装置の筐体
JP2012080388A (ja) * 2010-10-04 2012-04-19 Mitsumi Electric Co Ltd アンテナ装置
JP2012198537A (ja) * 2011-03-10 2012-10-18 Ntn Corp 光コネクタ部材およびその製造方法
JP2015516786A (ja) * 2012-05-16 2015-06-11 コンチネンタル オートモーティヴ ゲゼルシャフト ミット ベシュレンクテル ハフツングＣｏｎｔｉｎｅｎｔａｌ Ａｕｔｏｍｏｔｉｖｅ ＧｍｂＨ 送信アンテナ部材と受信アンテナ部材とを備えたアンテナモジュール
JP2016025477A (ja) 2014-07-18 2016-02-08 株式会社ヨコオ 車載用アンテナ装置
JP2016036104A (ja) * 2014-08-04 2016-03-17 富士通株式会社 無線通信モジュール
JP2016211358A (ja) 2015-04-30 2016-12-15 カルソニックカンセイ株式会社 車両用キーレスエントリーシステムおよび車載装備の制御方法
WO2017086377A1 (fr) * 2015-11-19 2017-05-26 日本電気株式会社 Dispositif de communication sans fil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021241089A1 (fr) * 2020-05-26 2021-12-02 豊田合成株式会社 Garniture de véhicule
WO2022114161A1 (fr) * 2020-11-27 2022-06-02 株式会社ヨコオ Dispositif d'antenne embarqué
EP4254658A4 (fr) * 2020-11-27 2024-10-23 Yokowo Seisakusho Kk Dispositif d'antenne embarqué

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