WO2001033669A1 - Antenne dielectrique - Google Patents

Antenne dielectrique Download PDF

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Publication number
WO2001033669A1
WO2001033669A1 PCT/JP1999/006155 JP9906155W WO0133669A1 WO 2001033669 A1 WO2001033669 A1 WO 2001033669A1 JP 9906155 W JP9906155 W JP 9906155W WO 0133669 A1 WO0133669 A1 WO 0133669A1
Authority
WO
WIPO (PCT)
Prior art keywords
dielectric
antenna
electrode
shows
antenna electrode
Prior art date
Application number
PCT/JP1999/006155
Other languages
English (en)
Japanese (ja)
Inventor
Yuji Masumoto
Hirofumi Yamaguchi
Futoshi Kuroki
Original Assignee
Nippon Tungsten Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Tungsten Co., Ltd. filed Critical Nippon Tungsten Co., Ltd.
Priority to PCT/JP1999/006155 priority Critical patent/WO2001033669A1/fr
Publication of WO2001033669A1 publication Critical patent/WO2001033669A1/fr

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Classifications

    • 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
    • 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
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point

Definitions

  • the present invention relates to a dielectric antenna used for wireless communication of ultrashort waves, quasi-microwaves, microwaves, and millimeter waves.
  • Such a dielectric antenna is disclosed in, for example, Japanese Patent Application Laid-Open No. H10-174334, Japanese Patent Application Laid-Open No. A block-shaped or planar dielectric disclosed in Japanese Patent Application Laid-Open No. 0-247807 and Japanese Patent Application Laid-Open No. Hei 10-33612, and a ground formed on the bottom surface of the dielectric.
  • An electrode and a power supply terminal are formed, a strip-shaped antenna electrode formed on the upper surface of the dielectric is formed, and the power supply terminal and the antenna electrode are connected through the inside of the dielectric.
  • the use of a dielectric material as the main radiating element has improved the decrease in antenna efficiency due to the increase in frequency.
  • conventional dielectric antennas have many issues that need to be improved.
  • conventional dielectric antennas have a problem that they are not suitable for surface mounting because the power supply terminal is located in the center of the back surface. In this case, the performance is degraded due to the influence of the lines of electric force due to the proximity of the antenna electrodes, and furthermore, it is difficult to match each frequency range due to the frequency characteristics of the antenna. Disclosure of the invention
  • the problem to be solved by the present invention is to solve the above-mentioned problems in the conventional dielectric antenna and to prevent the performance degradation as a dielectric antenna while being excellent in mountability and small in size.
  • a feeding terminal is provided on a bottom surface or a side surface of a dielectric formed in a planar shape, and a band-shaped antenna electrode is formed on an upper surface of the dielectric.
  • a feed terminal and an antenna electrode are connected through the inside or the side surface of the dielectric.
  • the planar dielectric is formed of ceramics having a high dielectric constant.
  • the band-shaped antenna electrode on the top surface of the planar dielectric is formed in a spiral shape.
  • the strip-shaped antenna electrode in a spiral shape, radio waves can be radiated in all directions 0 and omnidirectionality can be achieved.
  • a dielectric material having a high dielectric constant such as alumina or epoxy resin, has a low dielectric constant of ⁇ r of about 2 to 10.
  • the dielectric antenna in which the strip-shaped antenna electrode on the upper surface of the dielectric is formed in a spiral shape in which the strip-shaped antenna electrode on the upper surface of the dielectric is formed in a spiral shape.
  • this matching element can be formed integrally with the antenna electrode on the dielectric substrate.
  • the “spiral shape” refers to a shape drawn in a single stroke from the outside to the inside of the quadrilateral with a line segment parallel to the four sides of the quadrilateral.
  • the corners connecting the line segments are not necessarily right angles but are formed by arcs.
  • the strip-shaped electrodes formed by line segments parallel to the four sides allow four directions parallel to the plane of the dielectric substrate and two directions perpendicular to the surface of the dielectric substrate, that is, in all directions. Radio waves are radiated and can be received. In other words, it becomes an omnidirectional antenna.
  • “spiral” refers to a simple spiral that has no linear portion. -Also refers to things.
  • FIG. 1 shows a first embodiment of the present invention, and shows a dielectric antenna in which a strip-shaped antenna electrode on the top surface of a dielectric is formed in a linear spiral shape.
  • FIG. 2 shows a second embodiment of the present invention, and shows an example in which a dielectric is laminated via a thin layer having a low dielectric constant.
  • FIG. 3 is a diagram for explaining the effect of the dielectric antenna having the dielectric layered, and shows the current distribution on the antenna and the electrode.
  • FIG. 4 is a diagram illustrating the effect of a dielectric antenna in which dielectrics are stacked.
  • FIG. 5 shows an example in which a dielectric substrate is further attached to the bottom of a dielectric antenna in which a dielectric is laminated.
  • FIG. 6 shows an example of connecting a coil to achieve matching at a desired frequency in the dielectric antenna of the present invention.
  • FIG. 7 shows an example in which a coil is integrated with an antenna electrode on a dielectric substrate in order to achieve matching at a desired frequency in the dielectric antenna of the present invention.
  • FIG. 8 is a diagram showing an example of samples 1 to 6 in which the size of the dielectric ceramic substrate and the electrode pattern are different in the first embodiment.
  • FIG. 9 shows a second embodiment.
  • FIG. 10 shows a case where power is supplied using a coplanar line in the method for feeding a dielectric antenna according to the present invention.
  • FIG. 11 shows the method of feeding a dielectric antenna according to the present invention.
  • FIG. 12 shows the case where the feeding method for the dielectric antenna according to the present invention is performed using a coaxial line 5.
  • FIG. 13 shows a method of feeding a dielectric antenna according to the present invention, in which a slot is not used and power is fed from a back surface-using a coplanar line by electromagnetic coupling.
  • FIG. 2 shows a second embodiment of the present invention.
  • antenna electrodes are provided on both surfaces of one dielectric ceramic substrate 1. 2 is formed, and both antenna electrodes are connected via the side electrode 3 in the figure.
  • the current distribution on the antenna is roughly divided into modes in which the current is maximum and minimum on the side electrode 3 which is the middle point of the antenna.
  • the former is called the even symmetric mode
  • the latter is called the odd symmetric mode. 5
  • Figure 3 shows the current distribution of the lowest mode.
  • the frequency at which these modes operate as an antenna is when the effective length of the antenna is an integral multiple of half a wavelength, and each operating frequency is f f. Then 0 2
  • a small and thin antenna can be realized even in the frequency band below the mouthpiece.
  • a thin low dielectric constant of about several tens m is provided between two ceramic substrates 1, 1 each having antenna electrodes 2, 2 'formed on one side thereof.
  • ⁇ r 1 0 about
  • the ceramic substrates 1, 1 each having antenna electrodes 2, 2 'formed on one side thereof.
  • ⁇ r 1 0 about
  • the interface between the high-Z low-dielectric layer becomes closer to the magnetic wall as the difference in relative dielectric constant between them increases.
  • Even thin-ceramic substrate enables even-symmetric mode excitation, and a small and thin dielectric antenna can be obtained even in the frequency band below quasi-microwave.
  • FIG. 5 shows that the dielectric substrate 6 is attached to one surface of the dielectric antenna according to the first embodiment or the second embodiment so that frequency adjustment and matching can be achieved, thereby improving the antenna characteristics. It can be easily achieved.
  • FIG. 6 shows that in the dielectric antenna of the present invention, in order to obtain matching at a desired frequency other than the method of FIG. 5 described above, according to the Smith chart, if the dielectric antenna 20 has a capacitance component, the inductor ( The former shows the case of installing a capacitor if the coil 6) is an inductor component.
  • FIG. 7 shows a case where the inductor (coil) 7 as a matching element is formed integrally with the antenna electrode 2 on the dielectric substrate 6 by the method of FIG. 6 above in the dielectric antenna of the present invention. I have.
  • FIG. 8 shows the results of measuring the frequency and the return loss characteristics of the first embodiment in which samples of (1) to (4) having different ceramic substrate sizes and electrode patterns were prototyped. Table 1 shows the measurement results. No. size (mm) Frequency (MHz) Return loss (dB)
  • FIG. 9 shows the second embodiment, in which samples of 1 to ⁇ having different electrode patterns are prototyped, and the frequency and the return loss characteristics are measured. Table 2 shows the measurement results.
  • FIG. 10 shows a case where power is supplied using the coplanar line 8 in the method of feeding a dielectric antenna according to the present invention.
  • FIG. 11 shows a case where power is supplied using nine microstrip lines in the method for supplying a dielectric antenna according to the present invention.
  • FIG. 12 shows a case where power is supplied using the coaxial line 10 in the method for feeding a dielectric antenna according to the present invention.
  • Fig. 13 shows the method of feeding a dielectric antenna according to the present invention. The case where power is supplied using the planar line 11 is shown.
  • the present invention has the following effects.
  • the dielectric antenna according to the present invention in which the strip-shaped antenna electrode on the upper surface of the dielectric is formed in a spiral shape, can achieve matching by connecting an inductance coil or a capacitor to its feeding terminal.
  • This invention can be utilized in manufacture of the dielectric antenna used for wireless communication.

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  • Details Of Aerials (AREA)

Abstract

L'invention concerne une petite antenne diélectrique, facile à monter et non susceptible d'une altération de ses performances. Cette antenne comprend des bornes d'alimentation (3, 4) fixées sur la surface supérieure ou sur un côté d'un matériau diélectrique plat (1). Une électrode d'antenne (2) du type fil électrode est formée sur la surface supérieure du matériau diélectrique (1). Les bornes d'alimentation (3, 4) et l'électrode (2) de l'antenne sont connectées dans le matériau diélectrique (1) ou à travers le côté de celui-ci. Le matériau diélectrique (1) est en céramique et l'électrode fil (2) forme une spirale.
PCT/JP1999/006155 1999-11-04 1999-11-04 Antenne dielectrique WO2001033669A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP1999/006155 WO2001033669A1 (fr) 1999-11-04 1999-11-04 Antenne dielectrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1999/006155 WO2001033669A1 (fr) 1999-11-04 1999-11-04 Antenne dielectrique

Publications (1)

Publication Number Publication Date
WO2001033669A1 true WO2001033669A1 (fr) 2001-05-10

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ID=14237197

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/006155 WO2001033669A1 (fr) 1999-11-04 1999-11-04 Antenne dielectrique

Country Status (1)

Country Link
WO (1) WO2001033669A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1643727B (zh) * 2002-09-20 2012-05-30 圣韵无线技术公司 紧凑、低外形、单馈电、多频带的印制天线
CN102035070B (zh) * 2009-09-28 2014-01-01 深圳富泰宏精密工业有限公司 天线组件
DE102007037614B4 (de) * 2007-08-09 2014-03-13 Continental Automotive Gmbh Mehrteilige Antenne mit zirkularer Polarisation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08288727A (ja) * 1995-04-14 1996-11-01 Matsushita Electric Works Ltd 携帯用通信機
JPH1098405A (ja) * 1996-09-25 1998-04-14 Murata Mfg Co Ltd アンテナ装置
JPH11122024A (ja) * 1997-10-13 1999-04-30 Tdk Corp 積層チップアンテナ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08288727A (ja) * 1995-04-14 1996-11-01 Matsushita Electric Works Ltd 携帯用通信機
JPH1098405A (ja) * 1996-09-25 1998-04-14 Murata Mfg Co Ltd アンテナ装置
JPH11122024A (ja) * 1997-10-13 1999-04-30 Tdk Corp 積層チップアンテナ

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1643727B (zh) * 2002-09-20 2012-05-30 圣韵无线技术公司 紧凑、低外形、单馈电、多频带的印制天线
DE102007037614B4 (de) * 2007-08-09 2014-03-13 Continental Automotive Gmbh Mehrteilige Antenne mit zirkularer Polarisation
CN102035070B (zh) * 2009-09-28 2014-01-01 深圳富泰宏精密工业有限公司 天线组件

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