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WO2008032886A1 - Antenne de communication hertzienne et son procédé de fabrication - Google Patents

Antenne de communication hertzienne et son procédé de fabrication Download PDF

Info

Publication number
WO2008032886A1
WO2008032886A1 PCT/KR2006/003680 KR2006003680W WO2008032886A1 WO 2008032886 A1 WO2008032886 A1 WO 2008032886A1 KR 2006003680 W KR2006003680 W KR 2006003680W WO 2008032886 A1 WO2008032886 A1 WO 2008032886A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
pcb
ceramic body
electrode pattern
wireless communication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2006/003680
Other languages
English (en)
Inventor
Dong Hyun Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Acetronix Co Ltd
Original Assignee
Acetronix 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 Acetronix Co Ltd filed Critical Acetronix Co Ltd
Priority to PCT/KR2006/003680 priority Critical patent/WO2008032886A1/fr
Publication of WO2008032886A1 publication Critical patent/WO2008032886A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas

Definitions

  • the present invention relates, in general, to an antenna for wireless communication and, more particularly, to an antenna, which includes a square pillar-shaped dielectric ceramic body having a rectangular through-hole formed in the center portion thereof and having an outer surface on which first and second electrode patterns are formed; a first PCB inserted into the through-hole formed in the center portion of the ceramic body and provided with a conductive stripline formed thereon; a second PCB formed to extend from a first end of the first PCB and to be integrated with the first PCB, the second PCB including an impedance matching unit; and a shield can that is in contact with one surface of the second PCB, and to a method of fabricating the antenna.
  • the structure and components of the antenna according to the present invention are improved, so that productivity is improved, and excellent antenna characteristics can be obtained, thus enabling the antenna to be applied to various types of electronic communication devices.
  • the present invention relates, in general, to an antenna for wireless communication and a method of fabricating the antenna and, more particularly, to a high performance antenna for wireless communication., in which a Printed Circuit Board
  • PCB including a feeder line, is inserted into a square pillar-shaped ceramic body, and which includes a balun therein.
  • Wireless communication technology starting from voice-oriented narrow band communication, is rapidly moving toward wideband communication, such as the Internet or multimedia communication.
  • wideband communication such as the Internet or multimedia communication.
  • IMT International Mobile Telecommunications
  • fourth generation mobile communication using ultrahigh speed mobile communication has been expected.
  • the technology for forming the base of such wireless communication is antenna technology, and the performance thereof influences the quality of communication, and thus the importance of antenna technology has gradually been increasing.
  • An antenna is a device functioning to efficiently radiate radio waves into space or to efficiently induce an electromotive force using radio waves, in order to achieve the purpose of wireless communication.
  • Antennas are classified into several types according to the structure and functionality thereof, that is, they are classified into antennas for long and medium waves, short waves, and ultrashort waves, according to the usable frequency, they are classified into antennas for broadcasting, typical communication, direction finding, navigation, satellite communication, and radio telescopy, according to the purpose of the use thereof, they are classified into a standing-wave antenna, a traveling wave antenna, and a log periodic antenna according to the principle of operation, they are classified into an isotropic antenna, an omnidirectional antenna, a unidirectional antenna, and a bilateral antenna according to directivity characteristics, they are classified into a linearly polarized antenna, a circularly polarized antenna, and an elliptically polarized antenna according to polarization characteristics, and they are classified into a wideband antenna, a narrow band antenna, a positive impedance antenna, and a tuned antenna according to the frequency characteristics thereof .
  • the antenna includes an extension coil or a loading condenser, which increases or decreases the resonance frequency of the antenna, a trap, which is a coil used when radio waves having various frequencies are intended to be used, and feeder lines, which feed electric energy, in addition to elements, which are parts for actually transmitting or receiving radio waves.
  • an electric wire composed of an external conductor and an internal conductor is a coaxial cable.
  • Important characteristics required for an antenna include impedance characteristics and gain. When the impedance values of an antenna and a coaxial cable are matched with each other, radio waves are most effectively transmitted, and thus impedance matching is very important. Further, if an antenna having a high gain is used, communication with a radio station located far away from the antenna is possible using only low power.
  • an object of the present invention is to provide an antenna for wireless communication, which has a new structure for performing excellent impedance matching.
  • Another object of the present invention is to provide a new antenna for wireless communication, which has a new structure for improving productivity and making it easy to maintain the quality of communication.
  • the present invention provides an antenna for wireless communication, comprising a square pillar-shaped dielectric ceramic body having a rectangular through-hole formed in a center portion thereof, and having a first electrode pattern and a second electrode pattern formed on an outer surface thereof; a first Printed Circuit Board (PCB) inserted into the through-hole formed in the center portion of the ceramic body and provided with a conductive stripline formed thereon; a second PCB formed to extend from a first end of the first PCB and to be integrated with the first PCB, the second PCB comprising an impedance matching unit; and a shield can that is in contact with a first surface of the second PCB.
  • PCB Printed Circuit Board
  • the first electrode pattern may be spirally formed on an upper portion of the outer surface of the ceramic body.
  • the second electrode pattern may be formed to have a predetermined area on a lower portion of the outer surface of the ceramic body, and may be electrically connected to the first electrode pattern.
  • the present invention provides a method of fabricating an antenna for wireless communication, comprising forming a square pillar-shaped dielectric ceramic body having a through-hole formed in a center portion thereof; forming a first electrode pattern on a first portion of the ceramic body and forming a second electrode pattern on a second portion of the ceramic body to be electrically connected to part of the first electrode pattern; fabricating a first Printed Circuit Board (PCB) comprising a feeding stripline, and a second PCB comprising an impedance matching unit so that the first and second PCBs are formed to be integrated with each other; inserting the first PCB into the through-hole of the ceramic body; and attaching a shield can to a first surface of the second PCB.
  • PCB Printed Circuit Board
  • the antenna for wireless communication is implemented by improving and developing a loop antenna and applying a ceramic body, is used in wireless communication using frequencies of 100MHz to 10GHz, has the characteristics of circular polarization, and is capable of being applied in many application fields, such as mobile communication, a Global Positioning System (GPS) , a Wireless Local Area Network (WLAN) , Digital Multimedia Broadcasting (DMB) , and Radio Frequency Identification (RFID) .
  • GPS Global Positioning System
  • WLAN Wireless Local Area Network
  • DMB Digital Multimedia Broadcasting
  • RFID Radio Frequency Identification
  • the antenna for wireless communication according to the present invention is implemented using a ceramic material to considerably reduce the size thereof, adopts a feeding method using a laminate PCB, which includes a conductive stripline, and is manufactured so that a ceramic body is formed in a square pillar-shape and the laminate PCB is inserted into the ceramic body, thus facilitating the assembly of the antenna and greatly simplifying the entire manufacturing process. Therefore, the manufacturing costs and productivity of the antenna can be remarkably improved, and the antenna can be easily mounted in various electronic devices .
  • the antenna of the present invention is a balanced antenna having a balun (balance to unbalance transformer) therein and is less influenced by surrounding objects, the antenna is stable.
  • the antenna of the present invention is implemented so that a second electrode pattern is formed on a ceramic body and a circuit for impedance matching is constructed on a second PCB in order to realize a balun, thus the antenna itself includes the balun. Accordingly, the present invention can exhibit more stable antenna performance.
  • FIG. Ia is a perspective view showing the appearance of an antenna according to the present invention.
  • FIG. Ib is a perspective view showing the assembly of the antenna according to the present invention.
  • FIG. 2 is a graph showing return loss data related to the input impedance of the antenna according to the present invention;
  • FIG. 3 is a graph showing the Smith Chart related to the input impedance of the antenna according to the present invention.
  • FIG. 4 is a graph showing the axial ratio of the antenna according to the present invention.
  • FIG. 5 is a graph showing the elevation radiation pattern of the antenna according to the present invention. description of reference characters of important parts>
  • first electrode pattern 25 second electrode pattern
  • FIG. Ia is a perspective view showing the appearance of an antenna according to the present invention
  • FIG. Ib is a perspective view showing an assembly procedure for combining components constituting the antenna with each other.
  • a ceramic body 10, corresponding to the body of the antenna, is made of a dielectric, electronic ceramic material and is formed in a square pillar shape.
  • the permittivity of the ceramic body preferably has a range from 5 to 130.
  • a through-hole 12 is formed in the center portion of the ceramic body 10.
  • the through-hole 12 is a space into which a
  • PCB Printed Circuit Board
  • a first electrode pattern 20 is formed on the upper portion of the outer surface of the ceramic body 10, is spirally formed, and is implemented in a shape in which two loop antennas are arranged to be orthogonal to each other and are twisted together.
  • the first electrode pattern 20 is the electrode for transmitting or receiving radio waves, and is made of a conductive material.
  • a second electrode pattern 25 is formed on the lower portion of the outer surface of the ceramic body 10.
  • the second electrode pattern 25 is formed to surround the outer surface of the ceramic body 10, unlike the first electrode pattern 20.
  • the second electrode pattern 25 has a part electrically connected to the first electrode pattern 20, and is an electrode required to implement a balun. That is, the second electrode pattern 25 connects an unbalanced feeding unit (a first PCB for feeding which will be described later) to a balanced antenna (the first electrode pattern) .
  • the second electrode pattern 25 can be made of the same conductive material as the first electrode pattern 20.
  • a feeding structure to be inserted into the through-hole 12, formed in the center portion of the ceramic body 10, is formed using a Printed Circuit Board (PCB) , and has a conductive stripline (not shown) formed in the PCB.
  • the feeding structure is divided into two parts.
  • a first PCB 30 is a feeding unit for supplying electricity to the first electrode pattern
  • a second PCB 35 is a circuit unit required for impedance matching. As shown in the drawing, the first PCB 30 and the second PCB 35 are preferably formed such that they are integrated with each other.
  • a printed circuit pattern (not shown) required for impedance matching is formed on the second PCB 35.
  • This printed circuit pattern can be implemented using a conductive stripline or a micro stripline.
  • a printed circuit pattern for signal amplification can be further provided on the second PCB 35, in addition to the printed circuit pattern for impedance matching. In this case, active parts and passive parts are included in the signal amplification circuit .
  • a shield can 40 which is a shielding film for protecting the printed circuit pattern for impedance matching (or impedance matching + signal amplification) from electromagnetic interference.
  • the shield can 40 can be made of, for example, a conductive material.
  • the ceramic body is molded using a method of pressurizing dielectric ceramic powders, etc. so that the exterior thereof is formed in a square pillar shape and the interior thereof has a rectangular through-hole.
  • the molded ceramic body is sintered in an electric furnace.
  • the first and second electrode patterns are formed in such a way that a pattern is formed on each surface of the ceramic body using a conductive metal material, for example, silver paste, in a preferred embodiment of the present invention, through a printing method.
  • the formed patterns are baked in the electric furnace.
  • the first and second electrode patterns can be formed using a plating method.
  • Both the first PCB and the second PCB can be manufactured in such a way that a stripline for feeding and a printed circuit pattern for impedance matching are designed on a single PCB, and a typical printing method is utilized.
  • the section of the first PCB is fabricated to have the same shape as the section of the through-hole of the ceramic body.
  • the shield can is also attached to the second PCB through soldering .
  • An antenna for wireless communication the ceramic body of which has a sectional size of lOmmX ⁇ mm and has a length of
  • VSWR VSWR
  • gain -6.0 dBi
  • temperature coefficient 0 ⁇ 20 ppm/ ° C.
  • the antenna exhibited the characteristics of circular polarization.
  • a GPS frequency is 1.57542 GHz and exhibits an excellent value, and that the input impedance of the antenna is excellently matched to 50 ⁇ in a bandwidth of about 25 MHz (return loss is equal to or less than -1OdB) .
  • the antenna has a beam width of 120 ° or more.
  • the present invention provides a new antenna, which realizes excellent productivity through structural improvement, and also exhibits excellent resultant electrical characteristics.
  • the antenna of the present invention can be widely applied to various types of electronic communication devices.

Landscapes

  • Details Of Aerials (AREA)

Abstract

La présente invention concerne une antenne de communication hertzienne et un procédé de fabrication de l'antenne. L'antenne de l'invention comprend un corps céramique diélectrique (10) à piliers de forme carrée présentant un orifice de passage rectangulaire (12) formé dans sa partie centrale, et présentant une surface extérieure sur laquelle sont formés un premier et un second motif d'électrode (20 et 25). Une première carte de circuits imprimés (PCB) (30) est insérée dans l'orifice de passage formé dans la partie centrale du corps céramique, et dotée d'un piste conductrice formée sur celle-ci. Une seconde PCB (35) est formée pour s'étendre à partir d'une première extrémité de la première PCB et pour être intégrée à la première PCB, et comprend une unité d'adaptation d'impédance. Un boîtier de protection (40) est en contact avec une surface de la seconde PCB. L'invention a également pour objet un procédé de fabrication de l'antenne. L'invention permet d'améliorer la productivité et d'obtenir d'excellentes propriétés d'antenne.
PCT/KR2006/003680 2006-09-15 2006-09-15 Antenne de communication hertzienne et son procédé de fabrication Ceased WO2008032886A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2006/003680 WO2008032886A1 (fr) 2006-09-15 2006-09-15 Antenne de communication hertzienne et son procédé de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2006/003680 WO2008032886A1 (fr) 2006-09-15 2006-09-15 Antenne de communication hertzienne et son procédé de fabrication

Publications (1)

Publication Number Publication Date
WO2008032886A1 true WO2008032886A1 (fr) 2008-03-20

Family

ID=39183918

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2006/003680 Ceased WO2008032886A1 (fr) 2006-09-15 2006-09-15 Antenne de communication hertzienne et son procédé de fabrication

Country Status (1)

Country Link
WO (1) WO2008032886A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2477290A (en) * 2010-01-27 2011-08-03 Sarantel Ltd Dielectrically loaded antenna and radio communication apparatus
GB2477289A (en) * 2010-01-27 2011-08-03 Sarantel Ltd Dielectrically loaded antenna and radio communication apparatus
GB2491282A (en) * 2010-01-27 2012-11-28 Sarantel Ltd A dielectrically loaded antenna and radio communication apparatus
US8599101B2 (en) 2010-01-27 2013-12-03 Sarantel Limited Dielectrically loaded antenna and radio communication apparatus
GB2503930A (en) * 2012-07-13 2014-01-15 Harris Corp Dielectrically loaded antenna with PCB feeder structure and mounting tabs, mounted to RF PCB
US9112273B2 (en) 2012-01-13 2015-08-18 Harris Corporation Antenna assembly
US9306273B2 (en) 2012-12-06 2016-04-05 Harris Corporation Multifilar antenna

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09223913A (ja) * 1996-02-16 1997-08-26 Murata Mfg Co Ltd アンテナ装置
JPH1041722A (ja) * 1996-07-25 1998-02-13 Murata Mfg Co Ltd 表面実装型アンテナ及びそれを用いた通信機
US20060139227A1 (en) * 2004-11-09 2006-06-29 Alps Electric Co., Ltd. Antenna device having enhanced reception sensitivity in wide bands

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09223913A (ja) * 1996-02-16 1997-08-26 Murata Mfg Co Ltd アンテナ装置
JPH1041722A (ja) * 1996-07-25 1998-02-13 Murata Mfg Co Ltd 表面実装型アンテナ及びそれを用いた通信機
US20060139227A1 (en) * 2004-11-09 2006-06-29 Alps Electric Co., Ltd. Antenna device having enhanced reception sensitivity in wide bands

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2477289B (en) * 2010-01-27 2014-08-13 Harris Corp A radio communication apparatus having improved resistance to common mode noise
GB2477289A (en) * 2010-01-27 2011-08-03 Sarantel Ltd Dielectrically loaded antenna and radio communication apparatus
WO2011092498A1 (fr) * 2010-01-27 2011-08-04 Sarantel Limited Antenne chargée de façon diélectrique et appareil de radiocommunication
GB2491282A (en) * 2010-01-27 2012-11-28 Sarantel Ltd A dielectrically loaded antenna and radio communication apparatus
JP2013518498A (ja) * 2010-01-27 2013-05-20 サランテル リミテッド 誘電体装荷アンテナ及び無線通信装置
US8599101B2 (en) 2010-01-27 2013-12-03 Sarantel Limited Dielectrically loaded antenna and radio communication apparatus
GB2477290B (en) * 2010-01-27 2014-04-09 Harris Corp A dielectrically loaded antenna and radio communication apparatus
US8736513B2 (en) 2010-01-27 2014-05-27 Sarantel Limited Dielectrically loaded antenna and radio communication apparatus
GB2477290A (en) * 2010-01-27 2011-08-03 Sarantel Ltd Dielectrically loaded antenna and radio communication apparatus
GB2491282B (en) * 2010-01-27 2014-12-03 Harris Corp A dielectrically loaded antenna and a method of manufacture thereof
US9112273B2 (en) 2012-01-13 2015-08-18 Harris Corporation Antenna assembly
GB2503930A (en) * 2012-07-13 2014-01-15 Harris Corp Dielectrically loaded antenna with PCB feeder structure and mounting tabs, mounted to RF PCB
US9306273B2 (en) 2012-12-06 2016-04-05 Harris Corporation Multifilar antenna

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