JP2003198230A - Integrated dielectric resin antenna - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a miniaturized, high-performance and low-cost integral dielectric resin antenna, capable of communication in different frequency bands. <P>SOLUTION: The integrated dielectric resin antenna includes a plurality of antenna portions 1-3 respectively provided for mutually different frequency bands. Each of the plurality of antenna portions 1-3 is constituted of a dielectric formed of a dielectric resin composite material and a conductor, to form an integral structure by integrating each other. The dielectric resin composite material is produced by compounding synthetic resin with a filling material formed of dielectric inorganic powder. Thermoplastic resin is employed as the synthetic resin. The dielectric resin composite material capable of fusion molding, such as injection molding, extrusion molding, and compression molding is employed. As the filling material formed of dielectric inorganic powder, dielectric ceramic powder, preferably having a permittivity of 20 or more and a dielectric dissipation factor of 0.005 or less is employed. The filling material is formulated in a ratio of 10-40 vol.% capacity. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on an automobile or the like and is used for a radio, a television, a car navigator, a telephone, an ET
The present invention relates to a small-sized dielectric resin integrated antenna for collectively performing communication for various purposes such as C, a distance sensor for collision prevention, and CS (satellite communication).

[0002]

2. Description of the Related Art In automobiles, in addition to radios and televisions, GPS (Global Positioning)
Many wireless communication devices such as a car navigation system using a system), a terminal of an automatic toll collection system (ETC), a mobile phone, and an inter-vehicle distance sensor are installed.
These wireless communication devices have different frequency bands to be used, one antenna cannot be used in common, and each has a single antenna. The antennas of these communication devices account for a large proportion of the size of each device, which hinders downsizing of in-vehicle communication devices.

Therefore, the present inventor has tried various integrated antennas in which the antennas of these communication devices are integrated.
In order to make the integrated antenna effective, it is necessary to reduce the size of each antenna part and to facilitate the integration.
The small antenna includes a film antenna, a patch antenna, and the like. However, it is difficult for these conventional antennas to satisfy both conditions of miniaturization and integration from the viewpoint of material. For example, although patch antennas have been considered as individual antennas to be integrated, general patch antennas use ceramics as a dielectric, and thus are difficult to integrate. If synthetic resin is used instead of ceramics as the dielectric, the integration is easy, but the dielectric constant is low, so
The antenna becomes larger. Further, it is considered that the sheet-shaped planar antennas are laminated and used, but it is difficult to reduce the size because the dielectric is a synthetic resin.

As a dielectric resin material obtained by enhancing the dielectric properties of synthetic resin, various materials containing inorganic fibers having a high dielectric constant have been proposed. However, since fibers have anisotropy, it is difficult to obtain accuracy such as surface accuracy when the fibers are mixed, and anisotropy also occurs in dielectric properties. In particular, when a thin film is used, the effect of anisotropy is large, and there is a risk of causing a phase shift, which may affect the performance as an antenna. Particularly for high frequency antennas, since the wavelength is short, the requirements for dimensional accuracy and the like are strict, and therefore, it is difficult to secure the performance with a fiber mixed as a dielectric material.
Today, communication devices mounted on automobiles tend to have higher frequencies. In addition, the inorganic fiber is expensive as a material, and the cost of the antenna increases if it is used.

An object of the present invention is to provide a dielectric resin integrated antenna which can communicate in different frequency bands and can be miniaturized, improved in performance, and reduced in cost.

[0006]

The dielectric resin integrated antenna according to the present invention has a plurality of frequency band-specific antenna parts corresponding to different frequency bands, and these frequency band-specific antenna parts are dielectric resin composite materials. The dielectric resin composite material of the antenna portion for each frequency band is a synthetic resin compounded with a filler of dielectric inorganic powder. According to this configuration, since the dielectric resin composite material is used as the dielectric, the plurality of antenna parts can be easily integrated, and the dielectric constant is higher than that of the synthetic resin alone, and the individual antenna parts can be miniaturized. Can be achieved. In this way, the miniaturization of the individual antenna parts and the miniaturization of the entire integrated antenna can be achieved by integrating the plurality of antenna parts. Further, since the filler uses powder, unlike the case of using fibers, anisotropy is unlikely to occur, surface accuracy and dimensional accuracy are easily ensured, and anisotropy of dielectric properties is unlikely to occur. Therefore, an antenna having excellent characteristics that does not cause phase shift due to anisotropy of dielectric characteristics or the like can be obtained. In this way, higher performance is possible. Also,
Since the cost of powder is lower than that of fiber, the cost of the antenna can be reduced.

In the present invention, each of the frequency band-based antenna portions may be formed into a plate shape or a sheet shape, and these frequency band-based antenna portions may be integrated in a laminated state. The dielectric constants of the dielectric resin composite materials of the antenna parts for each frequency band are different from each other. By stacking in this way, a plurality of antenna portions can be easily integrated. Further, since the individual antenna parts for each frequency band have different permittivities, even if the frequency bands are largely different, the dimensional difference between the antenna patterns for each frequency band can be reduced.

In the present invention, the antenna part for each frequency band may be a patch antenna. In this case, it is assumed that the antenna parts for each frequency band have different dielectric constants of the dielectrics made of the dielectric resin composite material. The antenna parts for each frequency band are integrated so as to be arranged in a plane, for example. If the antenna parts for each frequency band are used as patch antennas and are arranged in a plane, the antenna parts for each frequency band can be easily integrated. For example, injection molding in the same mold, such as two-color molding or three-color molding, or a method of melting and bonding the antenna parts for each frequency band by heat fusion or ultrasonic fusion Can be integrated. Since the dielectric parts of the dielectric resin composite material are different from each other for each frequency band antenna part, the antenna parts of any frequency band can have the same thickness and the antenna pattern dimensional difference can be made small, and the integrated plane Integrated antenna.

When the antenna parts for each frequency band are used as patch antennas, the thicknesses of the dielectrics made of the dielectric resin composite material of the antenna parts for each frequency band are different from each other. You may integrate so that it may arrange in a plane. By changing the thickness in this way, a dielectric resin composite material having the same dielectric constant can be used, which is easy to manufacture and can be manufactured at a lower cost.

In each of the above-mentioned constitutions of the present invention, the synthetic resin is a thermoplastic resin, and the dielectric resin composite material is capable of being melt-molded by injection molding, extrusion molding or compression molding. Is preferred. By using a dielectric resin composite material of such a material, by melt molding,
The dielectric resin integrated antenna can be easily molded into a desired shape.

The dielectric inorganic powder filler is a dielectric ceramic powder having a dielectric constant of 20 or more and a dielectric loss tangent of 0.005 or less. The dielectric resin composite material contains 10 to 40 volumes of the filler. % May be used. In order to reduce the size of the antenna, it is preferable that the filler has a high dielectric constant and a small dielectric loss tangent (Tan δ) that is an ineffective component. The value of the dielectric constant of 20 or more and the dielectric loss tangent of 0.005 or less is an excellent value among those generally obtained as dielectric ceramic powder. The higher the compounding ratio of the filler, the higher the dielectric constant of the dielectric resin composite material, but if it is too high, the moldability deteriorates. When the dielectric ceramic powder having the above-mentioned dielectric constant and dielectric loss tangent is used as the filler and the blending amount is set, for example, the dielectric resin composite material has a dielectric constant of about 5 to 15 and a dielectric loss tangent of 0.0.
It can be about 008 to 0.003. The values of the dielectric constant and the dielectric loss tangent are excellent as a film antenna. Moreover, when the compounding amount of the filler is 40% or less, the moldability of the dielectric resin composite material is also excellent.

The dielectric ceramic powder filler may be an incompletely sintered body. High dielectric ceramics can obtain excellent dielectric properties only after being sintered. However, even if it is not made into a perfect sintered body, it is said to be calcination, even if it is once sintered at a temperature slightly lower than the actual sintering temperature, where it is not completely hardened, that is, incompletely fired. Even if it is a bound body, excellent dielectric characteristics can be obtained.

[0013]

1 is a block diagram of a first embodiment of the present invention.
Will be explained together. This dielectric resin integrated antenna 10 is
It has a plurality of frequency band-based antenna parts 1 to 3 corresponding to different frequency bands. These frequency band-based antenna parts 1 to 3 are composed of a dielectric part 5 and a conductor 6 of a dielectric resin composite material.
Composed of and. The antenna parts 1 to 3 for each frequency band are
It has a flat shape such as a plate shape or a sheet shape and is integrated with each other in a laminated state. This integration is performed so that the dielectric parts 5 are integrated with each other by fusion bonding such as heat fusion or ultrasonic fusion. When the antenna parts 1 to 3 for each frequency band are film-shaped, they may be integrally integrated by laminating or the like. Antenna parts 1 to 3 for each frequency band
Is a conductor 6 formed on the surface of a planar dielectric 5 in a predetermined antenna pattern. The conductor 6 is a foil-shaped member applied by, for example, printing or vapor deposition. The antenna patterns of the conductors 6 of the antenna parts 1 to 3 for each frequency band are patterns corresponding to the frequencies f1 to f3 of the antenna parts 1 to 3, respectively. In addition, the conductors 6 of the antenna parts 1 to 3 for each frequency band have a pattern in which substantially no overlapping portions are formed.

The dielectric resin composite material of the dielectric 5 of the antenna parts 1 to 3 for each frequency band is a synthetic resin mixed with a filler of dielectric inorganic powder, and powder is used as the filler. . A specific material example of the dielectric resin composite material will be described after the description of the embodiment of each drawing. The dielectric materials 5 of the antenna parts 1 to 3 for each frequency band have different dielectric constants of the dielectric resin composite material. In this case, the dielectric constants ε1 to ε3 of the dielectric 5 of the antenna parts 1 to 3 for each frequency band are set so that the difference in the thickness of the antenna parts 1 to 3 for each frequency band becomes small. In this embodiment,
The frequencies f1 to f3 of the antenna parts 1 to 3 for each frequency band have different digits, and f1 << f2 << f3, and the permittivity ε1 to
ε3 is ε1 >> ε2 >> ε3. The difference in dielectric constant is adjusted by the compounding ratio of the filler of the dielectric inorganic powder compounded in the dielectric resin composite material.

According to the dielectric resin integrated antenna 10 having this structure, since the dielectric resin composite material is used as the dielectric 5, the plurality of antenna parts 1 to 3 can be easily integrated. Further, the dielectric constant is higher than that of the synthetic resin alone, and the individual antenna parts 1 to 3 can be miniaturized. As described above, the miniaturization of the individual antenna parts 1 to 3 and the miniaturization of the integrated antenna 10 can be achieved by integrating the plurality of antenna parts 1 to 3. Further, since the filler uses powder, unlike the case of using fibers, anisotropy is unlikely to occur, surface accuracy and dimensional accuracy are easily ensured, and anisotropy of dielectric properties is unlikely to occur. Therefore, the antenna 10 having excellent characteristics can be obtained in which the phase shift or the like is not caused by the anisotropy of the dielectric characteristics. Moreover, since the cost of powder is lower than that of fiber, the cost of the antenna 10 can be reduced. Since the antenna parts 1 to 3 for each frequency band are integrated by laminating as a plane, they can be easily integrated. Moreover, since the dielectric constants ε1 to ε3 of the individual antenna parts 1 to 3 for each frequency band are different from each other, even if the frequency bands are largely different, the antenna parts for each frequency band (the dimensions of the patterns 1 to 3) are different. The difference can be reduced.

2 and 3 show another embodiment of the present invention. The dielectric resin integrated antenna 20 of this embodiment is
The antenna parts 21 to 26 for each frequency band are patch antennas, and the antenna parts 21 to 26 for each frequency band are provided.
Are integrated so that they are arranged in a plane. In the illustrated example, the antenna parts 21 to 26 for each frequency band are rectangular and are arranged in two rows. The antenna parts 21 to 26 for each frequency band, which are patch antennas, respectively, include a dielectric 27 made of a dielectric resin composite material, and conductors 28 and 2 on the front and back sides sandwiching the dielectric 27 on the front and back sides.
9 and 9. The dielectric resin composite material is a mixture of a synthetic resin and a filler of a dielectric inorganic powder as in the above embodiment. For each conductor 28, 29, for example, silver or an equivalent metal foil or metal thin plate is used. For example, as shown in FIG. 3, each conductor 28 is formed by punching by using a hoop material so that the plurality of conductors 28 are integrally connected to the lead wire portion 28a. Antenna part 21 for each frequency band
26, the dielectric constants of the dielectric resin composite materials of the dielectric 27 are different from each other. In this case, each frequency f1
The frequency band antenna parts 21 to 26 for .about.f6 have dielectric constants .epsilon.1 to .epsilon.6 such that their thicknesses are constant depending on their frequencies f1 to f6. The difference in dielectric constant is
It is adjusted by the blending ratio of the filler of the dielectric inorganic powder to be blended with the dielectric resin composite material.

To integrate the antenna parts 21 to 26 for each frequency band, the dielectric resin composite material having each dielectric constant is sequentially or simultaneously applied to the same mold by a method such as two-color molding or three-color molding. It is performed by injection molding. That is, simultaneous molding of a plurality of materials is performed. The conductors 28 and 29 are fixed to the dielectric 27 by insert molding or the like. In addition to this, the integrated state of the antenna parts 21 to 26 for each frequency band is as follows.
The individual antenna parts 21 to 26 for each frequency band may be manufactured and then melt-bonding such as heat fusion or ultrasonic fusion may be performed. When there are three or more frequency band-based antenna parts 21 to 26, some of them are simultaneously formed into the above-mentioned plural materials, and those simultaneously molded, or the simultaneously molded products and the single frequency band-based antenna parts 21. ~ 26
May be integrated by fusion.

Also in the case of this construction, by using a mixture of the dielectric resin composite material of the dielectric 27 and the filler of the dielectric inorganic powder, downsizing, high performance and cost reduction can be achieved.
In addition, the effect of miniaturization can be obtained by integrating the plurality of frequency band-based antenna parts 21 to 26.

When the antenna parts for each frequency band are arranged in a plane as patch antennas, for example, as shown in FIG. 4, the dielectric resin integrated antenna 30 is divided into a plurality of parts in the circumferential direction, and each of the parts is divided. The portions may be the antenna portions 31 to 34 for each frequency band. The antenna parts 31 to 34 for each frequency band are composed of the dielectric 35 and the conductors 36 on both surfaces thereof, as in the embodiment of FIG. Further, as shown in FIG. 5, the dielectric resin integrated antenna 40 may be divided into a circular portion at the center and an annular portion at the outer periphery thereof, and the divided portions may be the antenna portions 41 to 43 for each frequency band. The antenna parts 41 to 43 for each frequency band are composed of the dielectric 44 and the conductors 45 on both surfaces thereof, as in the embodiment of FIG.
The frequency band antenna parts 31 to 34, 41 to 43 in the embodiments of FIGS. 4 and 5 are integrated by simultaneous molding or fusion bonding as in the embodiment of FIG. The material of the dielectrics 35 and 44 is a dielectric resin composite material in which a filler of dielectric inorganic powder is mixed with a synthetic resin as in the above embodiments.

FIG. 6 shows still another embodiment of the present invention. The dielectric resin integrated antenna 50 of this embodiment is
Each of the frequency band antenna parts 51 to 53 is a patch antenna, and the frequency band antenna parts 51 to 53 have different thicknesses of the dielectric 54. The antenna parts 51 to 53 for each frequency band are integrated so as to be arranged in a plane. Antenna part for each frequency band 51
Numerals 53 to 53 are conductors 55 and 56 provided on both surfaces of the dielectric 54. The dielectric constants ε of the antenna parts 51 to 53 for each frequency band are the same. The material of the dielectric 54 is the same as that of the first embodiment, in which the filler of the dielectric inorganic powder is mixed with the synthetic resin.

The antenna parts 51 to 53 for each frequency band are integrated by, for example, integrally molding the entire dielectric 54 of the dielectric resin integrated antenna 50 by injection molding. In addition to this, as shown in FIG. 7 (A), a plurality of divided dielectrics 54a to 54c each having a different width and a uniform thickness are separately molded, and then these divided dielectrics 54a to 54c are overlapped and melt-bonded. By doing so, the antenna parts 51 to 5 for each frequency band
You may form the dielectric 54 with different thickness for every 3. Further, as shown in FIG. 7B, a plurality of divided dielectrics 54a to 54c having different widths and uniform thicknesses may be sequentially formed by inserting the previously formed portions. .

In this way, the antenna part 5 for each frequency band
If the thicknesses of 1 to 53 are different, it is possible to cope with the difference in frequency by using the dielectric resin composite material having the same dielectric constant.
Therefore, the manufacturing is easy and the cost can be further reduced.

In each of the above embodiments, the dielectric resin composite material has substantially no anisotropy in dielectric characteristics. The term "substantially free from anisotropy" as used herein means that the anisotropy of the antenna is so low that the performance is not affected. This dielectric resin composite material is not limited to the dielectric constant, but is preferably one having no anisotropy, for example, one having no anisotropy in thermal expansion coefficient. The above-mentioned filler may be mixed by mixing a plurality of kinds of fillers. For the synthetic resin, one kind is used without mixing plural kinds. The dielectric resin composite material can also be said to be a dielectric resin composition.

Next, a specific example of the dielectric resin composite material used in each of the above embodiments will be described. Examples of the dielectric resin composite material include thermoplastic resins such as polyphenylene sulfide (PPS) resin and polypropylene (PP), and fillers of dielectric inorganic powder such as barium titanate, strontium titanate, calcium titanate, and calcium titanate. Titanate such as magnesium and neodymium titanate,
A mixture of titanium oxide can be used. This filler is powder and not fibrous. The blending ratio is preferably in the range of 5 to 70% by volume, more preferably 10 to 40%.

In this embodiment, the target performance required for the dielectric resin composite material is the high frequency band (GHz (GHZ)
(z) frequency band), the dielectric constant is as high as 5 or more, the dielectric loss tangent (= Tan δ) is 0.005 or less, preferably 0.001 or less, and a melt-moldable resin composite material. is there. Synthetic resin alone has a dielectric constant of 2
Since it is about 4, the dielectric constant of the dielectric resin composite material is preferably 5 or more. Melt molding is, for example, injection molding,
It is sufficient if either extrusion molding or compression molding can be performed. In order to achieve this target performance, it is preferable that the synthetic resin and the filler have the following materials and formulations.

Since the synthetic resin does not originally have a large difference in dielectric constant, a material having a dielectric loss tangent (= Tan δ) as small as possible, that is, a material having a high Q value (= 1 / Tan δ) is preferable. Tan δ of the synthetic resin is preferably 0.003 or less, and as satisfying the condition of Tan δ,
Polypropylene (PP), polyethylene (PE), polytetrafluoroethylene (PTFE), fluoroethylene propylene (FEP), polyphenylene ether (P
PE), syndiotactic polystyrene (SP
S), polyphenylene sulfide (PPS), liquid crystal polymer (LCP) and the like. Any of these synthetic resins may be used for this dielectric resin composite material.

The filler preferably has a high dielectric constant and a small dielectric loss tangent (= Tan δ). The filler has a dielectric constant of 20 or more and a Tan δ of 0.005.
The following high dielectric ceramic powders are preferred. In this condition, among the above-mentioned dielectric inorganic powder fillers, barium titanate largely deviates under the condition of Tan δ, but other fillers such as strontium titanate, calcium titanate, calcium magnesium titanate, and titanate. Both titanates such as neodymium and titanium oxide are applicable. Examples of the compounding amount of the filler are shown in Table 1 shown later, but as shown in the table, strontium titanate, calcium titanate, calcium magnesium titanate, titanium sane neodymium, etc. are in the range of 10 to 40% by volume. When blended with, the dielectric constant is about 5 to 15 and Tan δ is 0.00
The dielectric resin composite material was about 08 to 0.003.

Since the dielectric ceramic powder can obtain excellent dielectric properties only after being sintered, it is called calcination, which means that the temperature is a little lower than the actual sintering temperature (about 1300 ° C.). Bake once because it does not harden. In terms of density, when the density of the completely sintered body is 100, the density of the calcined incompletely sintered body is preferably 97 or more and less than 100. It should be noted that the general proposal example of the conventional dielectric resin composite material is a completely sintered body, and it is necessary to completely sinter it in the manufacturing process. Further, it is also preferable that the dielectric powder is directly produced by the liquid layer method.

The average particle size of the filler of the dielectric inorganic powder is preferably in the range of 0.1 μm to 10 μm. According to the experiment, the smaller the particle size of the same material, the T
There is a good tendency that an δ is small.

Next, experimental examples in which the dielectric constants and the like of various dielectric resin composite materials are tested, and the dielectric constants and the like obtained from empirical formulas will be described. Table 1 shows experimental results (raw data) when polyphenylene sulfide (PPS) was used as the synthetic resin in the dielectric resin composite material, and the kinds and blending amounts of the fillers were changed variously as described in the table. There are 15 types of samples shown in sample Nos. 1 to 15. The sample numbers are not aligned because they are sorted by the type of filler. In Table 1, the reference numerals A to C added to the filler names are the same filler types, the same reference numerals are given to those having different compounding amounts, and even if the filler types are the same, their grades, etc. Those having different numbers are given different reference numerals. From this table,
Repeating the above contents, strontium titanate, calcium titanate, calcium magnesium titanate,
When titanium sun neodymium or the like is blended in a range of 10 to 40% by volume, the dielectric constant is about 5 to 15 and Tan δ is 0.0.
It can be seen that the dielectric resin composite material is about 008 to 0.003.

[0031]

[Table 1]

FIG. 8 shows that the synthetic resin in the dielectric resin composite material is polyphenylene sulfide (PPS) and the filler of the dielectric inorganic powder is strontium titanate.
The actual measurement value of the dielectric constant and the value (theoretical value) of the empirical formula of the dielectric constant when the compounding amount is variously changed are shown. FIG. 9 also shows the values of their dielectric loss tangents (= Tan δ). From these graphs, the value of the empirical formula is close to the actual measured value. From the empirical formula, the dielectric constant increases as the compounding amount of the filler increases, and when the compounding amount becomes about 80%, the dielectric constant becomes 80%. It can be seen that the size increases. The value of the dielectric loss tangent (= Tan δ) also increases as the compounding amount of the filler increases, but the rate of increase is small.

FIG. 10 and FIG. 11 show synthetic resin in the dielectric resin composite material as polyphenylene sulfide (PPS).
An example in which the filler of the dielectric inorganic powder is calcium magnesium titanate is shown in the same manner as FIGS. 8 and 9. When the filler is calcium magnesium titanate, the dielectric constant increases as the compounding amount of the filler increases, but Tan δ decreases.

FIGS. 12 to 17 show an example of the case where the synthetic resin in the dielectric resin composite material is polypropylene (PP) and the filler shown in FIG.
This is the same as FIG. 9.

In the dielectric resin integrated antenna of the present invention such as the above-described embodiments, the antenna parts for each frequency band are radio, television and GPS (Global Pos) respectively.
It is used for terminals of car navigation systems that use the itioning system), terminals of an automatic toll collection system (ETC), mobile phones, inter-vehicle distance sensors, and the like.

[0036]

The dielectric resin integrated antenna of the present invention is
It has a plurality of frequency band-based antenna parts corresponding to different frequency bands, each of these frequency band-based antenna parts are composed of a dielectric and a conductor of a dielectric resin composite material and are integrally integrated with each other. Since the above-mentioned dielectric resin composite material of the band-specific antenna part is a mixture of a synthetic resin and a filler of dielectric inorganic powder, communication with different frequency bands can be performed with one antenna, downsizing, high performance, And the cost can be reduced.

[Brief description of drawings]

1A and 1B are respectively an exploded perspective view and an external perspective view of a dielectric resin integrated antenna according to a first embodiment of the present invention.

2A and 2B are respectively a perspective view and a cross-sectional view taken along line BB of a dielectric resin integrated antenna according to another embodiment of the present invention.

FIG. 3 is a plan view showing an example of a conductor of the antenna.

FIG. 4 is a plan view of still another embodiment of the present invention.

FIG. 5 is a plan view of still another embodiment of the present invention.

6 (A) and 6 (B) are respectively a perspective view and a line sectional view of still another embodiment of the present invention.

7 (A) and 7 (B) are explanatory views showing each example of the method of manufacturing a dielectric in the same embodiment.

FIG. 8 is a graph showing a measured value of dielectric constant and a value obtained from an empirical formula when a compounding amount is variously changed for a dielectric resin composite material in which a specific resin is mixed with a specific filler.

FIG. 9 is a graph showing measured values of dielectric loss tangent and values obtained by empirical formulas for dielectric resin composite materials in which the same specific resin is mixed with the same specific filler when the compounding amount is variously changed.

FIG. 10 is a graph showing a measured value of dielectric constant and a value based on an empirical formula when the compounding amount is variously changed for the dielectric resin composite material in which the other specific filler is mixed with the same specific resin.

FIG. 11 is a graph showing a measured value of dielectric loss tangent and a value obtained by an empirical formula when the compounding amount is variously changed for the dielectric resin composite material in which the same specific resin is mixed with the same specific filler.

FIG. 12 is a graph showing a measured value of dielectric constant and a value obtained by an empirical formula when the compounding amount is variously changed for the dielectric resin composite material in which the other specific resin is mixed with the other specific filler.

FIG. 13 is a graph showing a measured value of dielectric loss tangent and a value obtained by an empirical formula when the compounding amount is variously changed for the dielectric resin composite material in which the same specific resin is mixed with the same specific filler.

FIG. 14 is a graph showing a measured value of dielectric constant and a value obtained by an empirical formula when the compounding amount is variously changed for the dielectric resin composite material in which the other specific filler is mixed with the specific resin.

FIG. 15 is a graph showing measured values of dielectric loss tangent and values obtained from empirical formulas for dielectric resin composite materials in which the same specific resin is mixed with the same specific filler when the compounding amount is variously changed.

FIG. 16 is a graph showing a measured value of dielectric constant and a value based on an empirical formula when the compounding amount is variously changed for the dielectric resin composite material in which the other specific filler is mixed with the specific resin.

FIG. 17 is a graph showing a measured value of dielectric loss tangent and a value obtained from an empirical formula when the compounding amount is variously changed for the dielectric resin composite material in which the same specific resin is mixed with the same specific filler.

[Explanation of symbols]

1-3 ... Antenna parts by frequency band 5 ... Dielectric 6 ... Electrode 10 ... Dielectric resin integrated antenna 20 ... Dielectric resin integrated antenna 21-26 ... Antenna parts by frequency band 27 ... Dielectric 28, 29 ... Electrodes 30 ... Dielectric resin integrated antenna 31-34 ... Antenna parts by frequency band 35 ... Dielectric 36 ... Electrode 40 ... Dielectric resin integrated antenna 41-43 ... Antenna parts by frequency band 44 ... Dielectric 45 ... Electrode 50 ... Dielectric resin integrated antenna 51-53 ... Antenna parts by frequency band 54 ... Dielectric 55 ... Electrode

Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H01Q 21/30 H01Q 21/30 F term (reference) 5J021 AA03 AA06 AA09 AB04 AB06 HA05 HA06 HA10 JA03 JA07 5J045 AA03 AB02 AB05 AB06 DA10 EA07 GA02 HA03 MA07 NA01 5J046 AA07 AA09 AA10 AA13 AB01 AB11 AB13 PA07 QA02

Claims (7)

[Claims] 1. A plurality of frequency band-specific antenna parts corresponding to mutually different frequency bands, each of these frequency band-specific antenna parts being composed of a dielectric and a conductor of a dielectric resin composite material and being integrally integrated with each other. A dielectric resin integrated antenna in which the dielectric resin composite material of the antenna part for each frequency band is a mixture of a synthetic resin and a filler of a dielectric inorganic powder. 2. The antenna part for each frequency band has a plate shape or a sheet shape, and the dielectric parts of the dielectric resin composite materials are different from each other for the antenna part for each frequency band,
The dielectric resin integrated antenna according to claim 1, wherein the antenna parts for each frequency band are integrated in a laminated state. 3. The antenna part for each frequency band is a patch antenna, and the dielectric parts made of a dielectric resin composite material have different permittivities between the antenna parts for each frequency band. The dielectric resin integrated antenna according to claim 1, wherein the antenna parts are integrated so as to be arranged in a plane. 4. The antenna part for each frequency band is a patch antenna, and the antenna parts for each frequency band have different thicknesses of dielectrics made of a dielectric resin composite material. The dielectric resin integrated antenna according to claim 1, wherein the antenna parts are integrated so as to be arranged in a plane. 5. The synthetic resin is a thermoplastic resin, and the dielectric resin composite material is capable of being melt-molded by injection molding, extrusion molding, compression molding, or the like. The dielectric resin integrated antenna according to any one of the above. 6. The dielectric resin composite material according to claim 6, wherein the dielectric inorganic powder filler has a dielectric constant of 20 or more and a dielectric loss tangent of 0.00.
Dielectric ceramic powder of 5 or less.
The dielectric resin integrated antenna according to any one of claims 1 to 5, which is mixed in an amount of -40% by volume. 7. The dielectric resin integrated antenna according to claim 6, wherein the filling material of the dielectric ceramic powder is an incompletely sintered body.