EP1294050A1 - Inverted-F antenna - Google Patents

Inverted-F antenna Download PDF

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Publication number
EP1294050A1
EP1294050A1 EP01121275A EP01121275A EP1294050A1 EP 1294050 A1 EP1294050 A1 EP 1294050A1 EP 01121275 A EP01121275 A EP 01121275A EP 01121275 A EP01121275 A EP 01121275A EP 1294050 A1 EP1294050 A1 EP 1294050A1
Authority
EP
European Patent Office
Prior art keywords
plane
inverted
antenna
pillar
gap
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.)
Withdrawn
Application number
EP01121275A
Other languages
German (de)
French (fr)
Inventor
Mao Li c/o Z-Com Inc. Science-Bas. Ind.Park Fu
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.)
Z Com Inc
Original Assignee
Z Com Inc
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 Z Com Inc filed Critical Z Com Inc
Priority to EP01121275A priority Critical patent/EP1294050A1/en
Publication of EP1294050A1 publication Critical patent/EP1294050A1/en
Withdrawn legal-status Critical Current

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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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element

Definitions

  • the present invention is related to an inverted-F antenna, and more particularly to an inverted-F antenna utilized in the wireless signal communication domain.
  • the applications of wireless communication are very general in daily life, for example the wireless mobile phones, the wireless modems and the wireless network cards.
  • the wireless devices utilize the RF (Radio Frequency) technique to meet the target of the communication between two clients in real-time.
  • the antenna is an important component in the mechanical design of wireless signal transmission.
  • An antenna is always designed as a metal line or a planar surface having suitable shape for the wavelength of wireless signal. How to improve the inverted-F antenna for avoiding the weak point is the main topic of the present invention.
  • Fig. 1 shows shape structure of the conventional inverted-F antenna.
  • This kind of inverted-F antenna have the obvious advantage in frequency bandwidth comparing to the general antenna, but it is difficult to manufacture due to the structure.
  • the inverted-F antenna consists of four planes 11,12,13,14 and a pillar 15 observing from the shape.
  • the first plane 11 vertically connects to the second plane 12; the second plane 12 vertically connects to the third plane 13; and the third plane 13 vertically connects to the fourth plane 14.
  • the pillar 15 connects to the fourth plane 14 and projects into the second plane 12. That is, one side of the pillar 15 is conductive electrically to the fourth plane 14 and the other side is isolated from the second plane 12.
  • the manufacture of the pillar 15 is complicated. One side of the pillar 15 must first be soldered on the fourth plane 14 and then another side must coat an isolated material from the second plane 12, so the manufacture cost is quite expensive.
  • An object of the present invention is to provide an inverted-F antenna having a new shape for simplifying the manufacture steps.
  • Another object of the present invention is to provide an inverted-F antenna for reducing the cost, but the original properties of inverted-F antenna are reserved.
  • an inverted-F antenna comprises a first plane; a second plane connecting to the first plane and having a gap; a third plane connecting to the second plane on an opposite side of the first plane; a fourth plane connecting to the third plane and having a distance from the first plane on an opposite side of the second plane; and a pillar connecting to a margin of the four plane and projecting to the gap of the second plane for forming the inverted-F antenna.
  • the inverted-F antenna is made of a metal.
  • the metal is a phosphor bronze.
  • the gap is of " " shape.
  • the first plane is parallel to the third plane; the second plane is parallel to the fourth plane; the first plane is vertical to the second plane; and the third plane is vertical to the fourth plane.
  • the pillar is vertical to the fourth plane and the second plane.
  • the inverted-F antenna is connected to a printed circuit board.
  • the printed circuit board has two the inverted-F antennas.
  • the inverted-F antenna is formed in a body.
  • a method for forming an inverted-F antenna comprising steps of providing a prototype of the inverted-F antenna; and forming the inverted-F antenna from the prototype in a method of forming in a body.
  • the inverted-F antenna comprises a first plane; a second plane connecting to the first plane and having a gap; a third plane connecting to the second plane on an opposite side of the first plane; a fourth plane connecting to the third plane and having a distance from the first plane on an opposite side of the second plane; and a pillar connecting to a margin of the four plane and projecting to the gap of the second plane for forming the inverted-F antenna.
  • Fig. 2 showing the antenna structure which includes the first plane 21, the second plane 22, the third plane 23, the fourth plane 24 and the pillar 25.
  • the second plane 22 has a gap 26 for isolating the pillar 25 from the second plane 22. There is a distance d2 between the first plane 21 and the fourth plane 24.
  • One side of the pillar 25 is connected to the margin of the fourth plane 24 and another side of the pillar 25 projects to the gap 26 of the second plane for forming the inverted-F antenna.
  • the gap 26 is in the shape of " ".
  • the inverted-F antenna is made of a metal material such as phosphor bronze.
  • the first plane 21 is parallel to the third plane 23; the second plane 22 is parallel to the fourth plane 24; the first plane 21 is vertical to the second plane 22; and the third plane 23 is vertical to the fourth plane 24.
  • the manufacture steps are simplified because the pillar 25 are connected to the margin of the fourth plane 24.
  • the inverted-F antenna can be easily formed by a mechine process. There is no need for the present invention to use a handwork on soldering the pillar. Due to the steps are simplified, the production cost may be down and the potentiality of the product will be promoted further.
  • Fig. 3 showing the manufacture steps of the inverted-F antenna.
  • a prototype 31 of the inverted-F is provided.
  • the inverted-F antenna may be formed for the prototype 31 by a machine process.
  • FIG. 4 shows the application of the inverted-F antenna.
  • a wireless communication device always needs an antenna.
  • Fig. 4 shows the head 321 of an inverted-F antenna puts forward and another head 321 puts backward.
  • the feature of the present invention is on the pillar 25 design.
  • the pillar 25 is designed on the margin so that the profits on manufacture may be issued.

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  • Waveguide Aerials (AREA)

Abstract

An inverted-F antenna comprises a first plane; a second plane connecting to the first plane and having a gap; a third plane connecting to the second plane on an opposite side of the first plane; a fourth plane connecting to the third plane and having a distance from the first plane on an opposite side of the second plane; and a pillar connecting to a margin of the four plane and projecting to the gap of the second plane for forming the inverted-F antenna.

Description

    FIELD OF THE INVENTION
  • The present invention is related to an inverted-F antenna, and more particularly to an inverted-F antenna utilized in the wireless signal communication domain.
    • BACKGROUND OF THE INVENTION
  • The applications of wireless communication are very general in daily life, for example the wireless mobile phones, the wireless modems and the wireless network cards. The wireless devices utilize the RF (Radio Frequency) technique to meet the target of the communication between two clients in real-time. However, the antenna is an important component in the mechanical design of wireless signal transmission.
  • An antenna is always designed as a metal line or a planar surface having suitable shape for the wavelength of wireless signal. How to improve the inverted-F antenna for avoiding the weak point is the main topic of the present invention.
  • Fig. 1 shows shape structure of the conventional inverted-F antenna. This kind of inverted-F antenna have the obvious advantage in frequency bandwidth comparing to the general antenna, but it is difficult to manufacture due to the structure. The inverted-F antenna consists of four planes 11,12,13,14 and a pillar 15 observing from the shape. The first plane 11 vertically connects to the second plane 12; the second plane 12 vertically connects to the third plane 13; and the third plane 13 vertically connects to the fourth plane 14. There is a distance d1 between the fourth plane 14 and the firth plane 11. The pillar 15 connects to the fourth plane 14 and projects into the second plane 12. That is, one side of the pillar 15 is conductive electrically to the fourth plane 14 and the other side is isolated from the second plane 12. The manufacture of the pillar 15 is complicated. One side of the pillar 15 must first be soldered on the fourth plane 14 and then another side must coat an isolated material from the second plane 12, so the manufacture cost is quite expensive.
    • SUMMARY OF THE INVENTION
  • An object of the present invention is to provide an inverted-F antenna having a new shape for simplifying the manufacture steps.
  • Another object of the present invention is to provide an inverted-F antenna for reducing the cost, but the original properties of inverted-F antenna are reserved.
  • According to the present invention, an inverted-F antenna comprises a first plane; a second plane connecting to the first plane and having a gap; a third plane connecting to the second plane on an opposite side of the first plane; a fourth plane connecting to the third plane and having a distance from the first plane on an opposite side of the second plane; and a pillar connecting to a margin of the four plane and projecting to the gap of the second plane for forming the inverted-F antenna.
  • In accordance with one aspect of the present invention, the inverted-F antenna is made of a metal.
  • In accordance with one aspect of the present invention, the metal is a phosphor bronze.
  • In accordance with one aspect of the present invention, the gap is of "
    Figure 00030001
    " shape.
  • In accordance with one aspect of the present invention, the first plane is parallel to the third plane; the second plane is parallel to the fourth plane; the first plane is vertical to the second plane; and the third plane is vertical to the fourth plane.
  • In accordance with one aspect of the present invention, the pillar is vertical to the fourth plane and the second plane.
  • In accordance with one aspect of the present invention, the inverted-F antenna is connected to a printed circuit board.
  • In accordance with one aspect of the present invention, the printed circuit board has two the inverted-F antennas.
  • In accordance with one aspect of the present invention, the inverted-F antenna is formed in a body.
  • According to the present invention, a method for forming an inverted-F antenna comprising steps of providing a prototype of the inverted-F antenna; and forming the inverted-F antenna from the prototype in a method of forming in a body.
  • In accordance with one aspect of the present invention, the inverted-F antenna comprises a first plane; a second plane connecting to the first plane and having a gap; a third plane connecting to the second plane on an opposite side of the first plane; a fourth plane connecting to the third plane and having a distance from the first plane on an opposite side of the second plane; and
    a pillar connecting to a margin of the four plane and projecting to the gap of the second plane for forming the inverted-F antenna.
  • The present invention may best be understood through the following description with reference to the accompanying drawings, in which:
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • Fig. 1 is a conventional inverted-F antenna structure;
  • Fig. 2 is an inverted-F antenna structure according to the present invention;
  • Fig. 3 is an manufacture method of the inverted-F antenna according to the present invention; and
  • Fig. 4 is the structure that two inverted-F antennas are soldered on a printed circuit board (PCB).
    • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • Please refer to Fig. 2 showing the antenna structure which includes the the first plane 21, the second plane 22, the third plane 23, the fourth plane 24 and the pillar 25. The second plane 22 has a gap 26 for isolating the pillar 25 from the second plane 22. There is a distance d2 between the first plane 21 and the fourth plane 24. One side of the pillar 25 is connected to the margin of the fourth plane 24 and another side of the pillar 25 projects to the gap 26 of the second plane for forming the inverted-F antenna. The gap 26 is in the shape of " ". The inverted-F antenna is made of a metal material such as phosphor bronze. The first plane 21 is parallel to the third plane 23; the second plane 22 is parallel to the fourth plane 24; the first plane 21 is vertical to the second plane 22; and the third plane 23 is vertical to the fourth plane 24.
  • The manufacture steps are simplified because the pillar 25 are connected to the margin of the fourth plane 24. The inverted-F antenna can be easily formed by a mechine process. There is no need for the present invention to use a handwork on soldering the pillar. Due to the steps are simplified, the production cost may be down and the potentiality of the product will be promoted further.
  • Please refer to Fig. 3 showing the manufacture steps of the inverted-F antenna. Firstly, a prototype 31 of the inverted-F is provided. There are a gap 26 and a pillar 25 at the relative positions. The inverted-F antenna may be formed for the prototype 31 by a machine process.
  • Please refer to Fig. 4 showing the application of the inverted-F antenna. A wireless communication device always needs an antenna. There are two inverted-F antennas mounted on the printed circuit board 41. The direction of the antennas may be different. Fig. 4 shows the head 321 of an inverted-F antenna puts forward and another head 321 puts backward.
  • The feature of the present invention is on the pillar 25 design. The pillar 25 is designed on the margin so that the profits on manufacture may be issued.
  • While the invention has been described in terms of what are presently considered to be the most practical and preferred embodiments, it is to be understood that the invention need not be limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.

Claims (11)

  1. An inverted-F antenna comprising :
    a first plane;
    a second plane connecting to said first plane and having a gap;
    a third plane connecting to said second plane on an opposite side of said first plane;
    a fourth plane connecting to said third plane and having a distance from said first plane on an opposite side of said second plane; and
    a pillar connecting to a margin of said four plane and projecting to said gap of said second plane for forming said inverted-F antenna.
  2. An inverted-F antenna according to Claim 1 wherein said inverted-F antenna is made of a metal.
  3. An inverted-F antenna according to Claim 2 wherein said metal is a phosphor bronze.
  4. An inverted-F antenna according to Claim 1 wherein said gap is of "
    Figure 00060001
    " shape.
  5. An inverted-F antenna according to Claim 1 wherein said first plane is parallel to said third plane; said second plane is parallel to said fourth plane; said first plane is vertical to said second plane; and said third plane is vertical to said fourth plane.
  6. An inverted-F antenna according to Claim 1 wherein said pillar is vertical to said fourth plane and said second plane.
  7. An inverted-F antenna according to Claim 1 wherein said inverted-F antenna is connected to a printed circuit board.
  8. An inverted-F antenna according to Claim 7 wherein said printed circuit board has two said inverted-F antennas.
  9. An inverted-F antenna according to Claim 1 wherein said inverted-F antenna is formed in a body.
  10. A method for forming an inverted-F antenna comprising steps of:
    providing a prototype of said inverted-F antenna; and
    forming said inverted-F antenna from said prototype in a method of forming in a body.
  11. A method according to Claim 10 wherein said inverted-F antenna comprises:
    a first plane;
    a second plane connecting to said first plane and having a gap;
    a third plane connecting to said second plane on an opposite side of said first plane;
    a fourth plane connecting to said third plane and having a distance from said first plane on an opposite side of said second plane; and
    a pillar connecting to a margin of said four plane and projecting to said gap of said second plane for forming said inverted-F antenna.
EP01121275A 2001-09-05 2001-09-05 Inverted-F antenna Withdrawn EP1294050A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01121275A EP1294050A1 (en) 2001-09-05 2001-09-05 Inverted-F antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01121275A EP1294050A1 (en) 2001-09-05 2001-09-05 Inverted-F antenna

Publications (1)

Publication Number Publication Date
EP1294050A1 true EP1294050A1 (en) 2003-03-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2031696A1 (en) * 2007-08-31 2009-03-04 Sercomm Corporation Antenna structure and manufacture method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4791423A (en) * 1985-12-03 1988-12-13 Nec Corporation Shorted microstrip antenna with multiple ground planes
WO1991002386A1 (en) * 1989-07-27 1991-02-21 SIEMENS AKTIENGESELLSCHAFT öSTERREICH Transmitting and receiving arrangement for portable appliances
GB2281661A (en) * 1993-09-07 1995-03-08 Motorola Inc Patch antenna having integral probe and methods for constuction thereof
US5550554A (en) * 1993-05-06 1996-08-27 At&T Global Information Solutions Company Antenna apparatus
WO1998044587A1 (en) * 1997-03-31 1998-10-08 Qualcomm Incorporated Increased bandwidth patch antenna
FR2791815A1 (en) * 1999-04-02 2000-10-06 Rene Liger Compact metallic plate UHF antenna, e.g. for small transponders, has folded trihedral structure with horizontal and vertical sections forming ground planes and inclined section acting as radiator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4791423A (en) * 1985-12-03 1988-12-13 Nec Corporation Shorted microstrip antenna with multiple ground planes
WO1991002386A1 (en) * 1989-07-27 1991-02-21 SIEMENS AKTIENGESELLSCHAFT öSTERREICH Transmitting and receiving arrangement for portable appliances
US5550554A (en) * 1993-05-06 1996-08-27 At&T Global Information Solutions Company Antenna apparatus
GB2281661A (en) * 1993-09-07 1995-03-08 Motorola Inc Patch antenna having integral probe and methods for constuction thereof
WO1998044587A1 (en) * 1997-03-31 1998-10-08 Qualcomm Incorporated Increased bandwidth patch antenna
FR2791815A1 (en) * 1999-04-02 2000-10-06 Rene Liger Compact metallic plate UHF antenna, e.g. for small transponders, has folded trihedral structure with horizontal and vertical sections forming ground planes and inclined section acting as radiator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2031696A1 (en) * 2007-08-31 2009-03-04 Sercomm Corporation Antenna structure and manufacture method thereof

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