WO2004059792A1 - アンテナ - Google Patents
アンテナ Download PDFInfo
- Publication number
- WO2004059792A1 WO2004059792A1 PCT/JP2003/016680 JP0316680W WO2004059792A1 WO 2004059792 A1 WO2004059792 A1 WO 2004059792A1 JP 0316680 W JP0316680 W JP 0316680W WO 2004059792 A1 WO2004059792 A1 WO 2004059792A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- antenna unit
- flag
- pair
- unit
- Prior art date
Links
Classifications
-
- 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
Definitions
- the present invention relates to antennas.
- Patent Document 1 discloses an antenna suitable for miniaturization with a wide directivity. As shown in FIG. 1, the antenna 1 has a pair of parallel shafts 2 and 3 and flag elements 5_1a to ld and 5-2a to 2d connected to the shafts. It is arranged on the substrate 7. Reference numerals 8 and 9 in the figure denote terminals, which connect the antenna 1 to an external circuit. Patent Document 1
- Patent No. 3 2 3 4 4 2 FIG. 10 The present inventors have intensively studied to improve an antenna of the above type. As a result, we noticed that adjusting the number of flag elements and their shapes changed the gain of the antenna.
- the present invention seeks to improve the gain in an antenna in which a pair of shaft portions and a flag element connected to the pair of shaft portions in line symmetry are arranged on substantially the same plane. Things. Disclosure of the invention
- the number of flag elements connected to one shaft portion is 6 to Assuming 1 2, the gain of the antenna was improved.
- the shape of the flag element is preferably a rectangle having a first side parallel to the shaft and a second side perpendicular to the shaft.
- the length of the second side is preferably about three times the length of the first side from the viewpoint of improving gain.
- FIG. 1 is a plan view showing the structure of a conventional antenna.
- FIG. 2 is a plan view showing the structure of the antenna according to the embodiment of the present invention.
- FIG. 3 is a plan view showing the structure of an antenna according to another embodiment of the present invention.
- FIG. 4 is a plan view showing the structure of an antenna according to another embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 2 shows the structure of the antenna 10 of the embodiment.
- the antenna 10 is formed by forming a conductive thin film portion 12 having a pattern shown in FIG. 1 on a flexible substrate 11 made of resin. This thin film portion 12 functions as an antenna.
- the pattern of the thin film section 12 is configured as follows. A pair of shaft portions 13 and 14 arranged at the center in the figure are connected at their upper ends. Eight flag elements 15 and 16 are connected to the shaft portions 13 and 14, respectively. Symbols 17 and 18 in the figure are terminals. This pattern has a line-symmetrical shape about the center line of the shaft portions 13 and 14.
- each of the flag elements 15 and 16 has a rectangular frame shape, and the horizontal sides (second side) 15 b and 16 b perpendicular to the shaft parts 13 and 14 are the vertical sides (first side). It is about 3 times longer than 15a and 16a. Also, the horizontal sides 15b and 16b are extended and connected to the shafts 13 and 14, respectively.
- a flag element having a rectangular frame shape is employed, but a flag element having another shape may be employed as long as the flag element has a closed frame shape.
- the antenna 10 having such a configuration is formed by printing the thin film portion 12 on the substrate 11.
- the thin film portion 12 on which a pattern is formed in advance may be attached to the substrate 11.
- the substrate 11 can be omitted if a sufficient shape-retaining performance can be ensured for the conductive material forming the pattern.
- a flexible material is used for the substrate 11, it can be deformed while maintaining the characteristics of the antenna.
- This antenna 10 can change the resistance of the pattern (resistance between terminals 17 and 18) by reducing or expanding the pattern, so that it can correspond to the frequency of the target transmission / reception radio wave.
- the pattern resistance is set to approximately 75 ohms, and for communication, the pattern resistance is set to approximately 50 ohms.
- the antenna 10 when a high-frequency AC voltage is applied to the terminals 17 and 18, for example, a positive charge is induced in the flag element 15 on the side of the shaft 13 and the other side of the shaft 14 Negative charges are induced in the flag element 16 of FIG. As a result, it is considered that current flows between the shafts 13 and 14 and electromagnetic waves are emitted.
- FIG. 3 shows an antenna 20 of another embodiment.
- the antenna 20 of this embodiment is obtained by forming a thin film portion 22 having the illustrated pattern on a substrate 21.
- the pattern of the thin sciaen 22 is the pattern shown in Fig. 2 (antenna unit) 11A and 11B arranged in line symmetry, connected at the upper end, and provided with terminals 27 and 28 at the lower end. is there. Elements that are substantially the same as those in FIG. 2 are given the same reference numerals, and descriptions thereof are omitted.
- the antenna 20 when a high-frequency AC voltage is applied to the terminals 27 and 28, for example, a positive charge is induced in the antenna unit 11A and a negative charge is induced in the antenna unit 11B. Is done. As a result, it is considered that current flows between the two and electromagnetic waves are emitted.
- FIG. 4 shows an antenna 30 according to another embodiment.
- the antenna 30 of this embodiment is obtained by forming a conductive thin film portion having the illustrated pattern on a resin substrate 31. Note that the same elements as those shown in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.
- the pattern of the conductive thin film portion is composed of the first antenna unit 32, the second antenna unit 33, the capacitor circuit 34, the transformer circuit 35, and the first and second evening units. It is roughly composed of rules 37 and 38.
- the first antenna unit 32 has substantially the same configuration as the antenna unit shown in FIG. That is, the lower-side extended portions of the 12 rectangular frame-shaped flag elements 15 and 16 (first flag elements) are connected to the pair of parallel shaft sections 13 and 14 respectively. In these flag elements 15 and 16, the horizontal side has a length approximately three times as long as the vertical side. This forms a unit antenna unit.
- the two unit antenna units 32 A and 32 B are arranged symmetrically with respect to each other to form a first antenna unit 32.
- the first flag elements 15a and 16a located on both lower sides protrude outward as compared with the other first flag elements.
- This first antenna unit transmits and receives electromagnetic waves in the UHF band.
- the first antenna unit 32 is connected to the first terminal via a comb-shaped capacitor circuit 34 as a high-pass filter.
- the transformer circuit 35 as a low-pass filter is connected to the capacitor circuit 34 from between the second terminal 38 and the second antenna unit 33.
- the second antenna unit 33 is a linear antenna for transmitting and receiving electromagnetic waves in the VHF band, and surrounds the first antenna unit 32 in a frame shape. This makes the entire antenna compact.
- second flag elements 41 and 42 are connected to the distal end and the proximal end (the second terminal 38 side) of the second antenna unit 33.
- the second flag elements 41 and 42 also have a rectangular frame shape, and the horizontal side has a length approximately three times the vertical side.
- the horizontal side (lower side) extends and is connected to the linear main body of the second antenna unit 33.
- the second flag elements 41 and 42 have a larger diameter than the first flag elements 15 and 16.
- the second flag elements 41, 42 are surrounded by frames 43, 44.
- the second flag elements 4 1 and 4 2 and the frame sections 3 4 and 4 4 are aligned with the center line of the antenna 30 (unit antenna unit 32 A, 32 B substantially coincides with the axis of symmetry of B), and the capacitor circuit 34 and the transformer circuit 35 are connected to the second flag elements 41, 42 and the frame section 34, It is arranged so that it is sandwiched between 4 and 4.
- first and second flag elements having a rectangular frame shape are employed, but these may be formed into other shapes as long as the frame shape is a closed frame.
- the number of first flag elements connected to each of the shaft portions 13 and 14 can also be changed.
- the number of second flag elements connected to the distal end portion and the proximal end portion of the second antenna unit may be plural.
- the antenna 30 having such a configuration is formed by printing a thin film portion on the substrate 31.
- the thin film portion on which the pattern has been formed may be attached to the substrate 31 in advance.
- the substrate 31 can be omitted if sufficient shape-retaining performance can be ensured for the conductive material forming the pattern. Also, when a flexible material is used for the substrate 31, it can be deformed while maintaining the characteristics of the antenna.
- the antenna 30 changes the resistance of the pattern (the resistance between the terminals 37 and 38) by reducing or enlarging the pattern, so that it can correspond to the frequency of the target transmission / reception radio wave.
- the pattern resistance is set to approximately 75 ohms, and for communication, the pattern resistance is set to approximately 50 ohms.
- this antenna 30 when a high-frequency AC voltage is applied to the terminals 37 and 38, for example, a positive charge is induced in the antenna unit 32A of the first antenna unit 32, and the other is induced. A negative charge is induced in the antenna unit 32B. As a result, it is thought that a current flows between the two and electromagnetic waves in the UHF band are emitted. Also, it is considered that electromagnetic waves in the VHF band are emitted from the second antenna unit 33. available.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003292791A AU2003292791A1 (en) | 2002-12-25 | 2003-12-25 | Antenna |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002373826A JP2006157072A (ja) | 2002-12-25 | 2002-12-25 | アンテナ |
JP2002-373826 | 2002-12-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004059792A1 true WO2004059792A1 (ja) | 2004-07-15 |
Family
ID=32677273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/016680 WO2004059792A1 (ja) | 2002-12-25 | 2003-12-25 | アンテナ |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP2006157072A (ja) |
AU (1) | AU2003292791A1 (ja) |
WO (1) | WO2004059792A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006246139A (ja) * | 2005-03-04 | 2006-09-14 | Sohdai Antenna Corp | アンテナ |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05327331A (ja) * | 1992-05-15 | 1993-12-10 | Matsushita Electric Works Ltd | プリントアンテナ |
JPH104308A (ja) * | 1996-06-14 | 1998-01-06 | Nippon Sheet Glass Co Ltd | 自動車用サイドガラスアンテナ |
JP2000013130A (ja) * | 1998-06-22 | 2000-01-14 | Hiroshi Takashima | アンテナ |
JP2000151248A (ja) * | 1998-11-16 | 2000-05-30 | Nippon Sheet Glass Co Ltd | 車両用ガラスアンテナ装置 |
JP2002319816A (ja) * | 2001-04-24 | 2002-10-31 | Ee C Ii Tec Kk | アンテナ装置 |
-
2002
- 2002-12-25 JP JP2002373826A patent/JP2006157072A/ja active Pending
-
2003
- 2003-12-25 AU AU2003292791A patent/AU2003292791A1/en not_active Abandoned
- 2003-12-25 WO PCT/JP2003/016680 patent/WO2004059792A1/ja not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05327331A (ja) * | 1992-05-15 | 1993-12-10 | Matsushita Electric Works Ltd | プリントアンテナ |
JPH104308A (ja) * | 1996-06-14 | 1998-01-06 | Nippon Sheet Glass Co Ltd | 自動車用サイドガラスアンテナ |
JP2000013130A (ja) * | 1998-06-22 | 2000-01-14 | Hiroshi Takashima | アンテナ |
JP2000151248A (ja) * | 1998-11-16 | 2000-05-30 | Nippon Sheet Glass Co Ltd | 車両用ガラスアンテナ装置 |
JP2002319816A (ja) * | 2001-04-24 | 2002-10-31 | Ee C Ii Tec Kk | アンテナ装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006246139A (ja) * | 2005-03-04 | 2006-09-14 | Sohdai Antenna Corp | アンテナ |
Also Published As
Publication number | Publication date |
---|---|
AU2003292791A1 (en) | 2004-07-22 |
AU2003292791A8 (en) | 2004-07-22 |
JP2006157072A (ja) | 2006-06-15 |
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