EP1885021B1 - Monopolantenne mit erweiterter Bandbreite und tragbares Kommunikationsendgerät mit derselben - Google Patents

Monopolantenne mit erweiterter Bandbreite und tragbares Kommunikationsendgerät mit derselben Download PDF

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Publication number
EP1885021B1
EP1885021B1 EP06126716A EP06126716A EP1885021B1 EP 1885021 B1 EP1885021 B1 EP 1885021B1 EP 06126716 A EP06126716 A EP 06126716A EP 06126716 A EP06126716 A EP 06126716A EP 1885021 B1 EP1885021 B1 EP 1885021B1
Authority
EP
European Patent Office
Prior art keywords
monopole antenna
radiating unit
ground
unit
mobile 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.)
Not-in-force
Application number
EP06126716A
Other languages
English (en)
French (fr)
Other versions
EP1885021A1 (de
Inventor
Wee-Sang Park
Se-Hyun Park
Young-Eil Kim
Jae-Hee Kim
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.)
Samsung Electronics Co Ltd
Samsung Electro Mechanics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Samsung Electro Mechanics 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 Samsung Electronics Co Ltd, Samsung Electro Mechanics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP1885021A1 publication Critical patent/EP1885021A1/de
Application granted granted Critical
Publication of EP1885021B1 publication Critical patent/EP1885021B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/08—Means for collapsing antennas or parts thereof
    • H01Q1/085—Flexible aerials; Whip aerials with a resilient base
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H01Q1/244—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas extendable from a housing along a given path
    • 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/40—Element having extended radiating surface

Definitions

  • the present invention relates to a monopole antenna with an expanded bandwidth and a mobile communication terminal having the same. More particularly, the present invention relates to a monopole antenna with an expanded bandwidth which can provide various services without an additional antenna, by expanding an operating frequency bandwidth by using a supplementary structure, and a mobile communication terminal having the same.
  • an RFID system and mobile communication are combined to provide new technology and service called mobile RFID (mRFID).
  • mRFID mobile RFID
  • an electronic tag, a reader, an antenna and a processing module are mounted on the mobile communication terminal, for reading information from another electronic tag and providing a useful information service to a user, or transmitting information of the mobile communication terminal to another device through the electronic tag in the mobile communication terminal.
  • An RFID antenna for the mRFID technology transmits and receives radio signals of 908.5 to 914MHz band, but an antenna for communication of the mobile communication terminal transmits and receives radio signals of 800MHz band.
  • DMB digital multimedia broadcasting
  • DVD-H digital video broadcasting-handhelds
  • the DMB service or the DVB-H service is a new concept mobile multimedia broadcasting service combining communication and broadcasting.
  • the user can watch a low frequency band broadcast through the wireless terminal.
  • a ground wave DMB service uses a frequency band of 176 to 212MHz, and a satellite DMB service uses an S-band of 2.630 to 2.655GHz, which is higher than the frequency band of the ground wave DMB service.
  • the DVB-H service based on digital video broadcasting-terrestrial which is a digital TV broadcasting standard developed and mainly used in Europe uses a frequency band of 400 to 800MHz.
  • antennas for transmitting and receiving radio signals for each service must be installed in the mobile communication terminal.
  • a mobile communication antenna for transmitting and receiving mobile communication radio signals for communication which is an intrinsic function of the mobile communication terminal
  • a service antenna for transmitting and receiving radio signals for each service are mounted on the mobile communication terminal.
  • European patent application EP 1482646 A2 discloses a portable terminal having a tuner for changing an antenna radiation pattern.
  • the tuner is formed at a predetermined distance of an antenna fitted to the main body of the portable terminal to change the current distribution of the main body, and the antenna radiation pattern as a consequence.
  • an antenna of a mobile communication terminal having a broad operating frequency band to transmit and receive both mobile communication radio signals and service radio signals.
  • the antenna mounted on a small-sized device such as the mobile communication terminal is seriously affected by the surrounding environment and sensitive to a frequency. It is thus difficult to attain the broadband of the antenna.
  • a monopole antenna with an expanded bandwidth according to claim 1.
  • the invention thus provides a monopole antenna with an expanded bandwidth which can provide various services without an additional antenna, by expanding an operating frequency bandwidth by using a supplementary structure.
  • the invention also provides a mobile communication terminal having the same.
  • the invention thus addresses the above disadvantages and other disadvantages not described above. Also, the present invention is not required to overcome the disadvantages described above, and an exemplary embodiment of the present invention may not overcome any of the problems described above.
  • the radiation inducing unit includes a pair of induction strips formed along the first side of the ground and disposed in parallel with each other.
  • the pair of induction strips preferably each comprise first connecting units formed on first ends opposite to the radiating unit in a lengthwise direction, the first connecting units connected with each other.
  • the pair of induction strips may each comprise second connecting units formed on second ends adjacent to the radiating unit in a lengthwise direction, the second connecting units connected with each other.
  • the first connecting units are extended to contact with the ground.
  • the radiating unit can be a whip antenna, and the second ends of the induction strips are then extended to the radiating unit and spaced apart from the radiating unit at a predetermined interval.
  • the current flow may be formed on the ground in the lengthwise direction of the radiation inducing unit, and an additional operating frequency is generated in a second antenna operation mode by the current formed on the ground and the current flowing through the radiating unit.
  • the operating frequency of the second antenna operation mode is preferably formed adjacent to that of an existing first antenna operation mode.
  • the pair of induction strips can be made of a rectangular conductor plate extended to one direction, or a conductor wire.
  • the total length of the pair of induction strips is about ⁇ /4.
  • the radiating unit can be supplied with power between each induction strip and the ground.
  • the invention also provides a mobile communication terminal having a monopole antenna as claimed in claim 10.
  • the casing preferably includes a front casing and a rear casing, and the radiation inducing unit is formed on the inner circumferences of the front casing and the rear casing.
  • the radiation inducing unit coated on the side of the casing preferably contacts a ground-formed circuit board.
  • a monopole antenna with an expanded bandwidth and a mobile communication terminal having the same will now be described in detail with reference to the accompanying drawings.
  • FIG. 1 is a perspective view illustrating a monopole antenna according to an exemplary embodiment of the present invention
  • FIG. 2 is an enlarged perspective view illustrating part of the monopole antenna of FIG. 1 .
  • the monopole antenna includes a radiating unit 10, a ground 30 and a radiation inducing unit 20.
  • the radiating unit 10 which radiates electromagnetic waves of a preset frequency band is a bar-shaped whip antenna.
  • the radiating unit 10 is supplied with power through a power feeding point 11 formed between the radiation inducing unit 20 and the ground 30.
  • the ground 30 is incorporated with a circuit board mounted on a mobile communication terminal.
  • the radiating unit 10 is connected to one side of the top end of the ground 30.
  • the ground 30 is formed in a rectangular plate shape having a length larger than a width by the shape of the circuit board.
  • the radiation inducing unit 20 is formed along the width direction of the ground 30, and includes a pair of induction strips 25 disposed in parallel with each other at a predetermined interval.
  • each of the induction strips 25 is made of a long band-shaped conductor plate, and extended from one side end to the other side end of the ground 30.
  • the pair of induction strips 25 are mounted on the top end of the ground 30 to be isolated from the ground 30 at a predetermined interval.
  • the side ends of the induction strips 25 facing the radiating unit 10 are connected by a first connecting unit 27.
  • the first connecting unit 27 is downwardly extended to be coupled to the ground 30. That is, each induction strip 25 is electrically coupled to the ground 30.
  • the radiation inducing unit 20 must not contact the radiating unit 10. Accordingly, the interval between the induction strips 25 is larger than the thickness of the radiating unit 10, and the induction strips 25 are disposed to be isolated from the radiating unit 10 at a predetermined interval.
  • the induction strips 25 of the radiation inducing unit 20 are formed in a band shape, but can be made of a metal wire formed along the width direction of the ground 30.
  • the induction strips 25 of the radiation inducing unit 20 are connected merely by the first connecting unit 27.
  • a second connecting unit 28 can be formed to connect the ends of the induction strips 25 adjacent to the radiating unit 10.
  • the radiation inducing unit 20 forms a closed loop by the induction strips 25, the first connecting unit 27 and the second connecting unit 28.
  • the length W of the radiation inducing unit 20 is about ⁇ /4, which is adjusted to vary an operating frequency.
  • each induction strip 25 of the radiation inducing unit 20 the current flows from the radiating unit side 10 to the first connecting unit side 27, and reaches the ground 30 through the first connecting unit 27. Therefore, in the ground 30, the current flows in '3' direction.
  • the current flows in '2' and '1' directions of FIG. 1 .
  • the current flow forms a first antenna operation mode which is an existing antenna operation mode. Accordingly, as shown in the conventional art of the graph of FIG. 5 , the general monopole antenna has one operating frequency.
  • the current 3 forms a second antenna operation mode with the current 1.
  • the first antenna operation mode formed by the current 2 and the current 1 and the second antenna operation mode formed by the current 3 and the current 1 are adjacent to each other, namely, when the operating frequency bands generated by the first and second antenna operation modes are adjacent to each other, the two operating frequencies are connected to expand the whole operating frequency bandwidth.
  • the broadband operating frequencies having two poles are formed.
  • the first pole region is formed by the first antenna operation mode and the operating frequency is generated in 900MHz band which is a general mobile communication frequency band
  • the second pole region is formed by the second antenna operation mode and the operating frequency is generated in 1.2GHz band adjacent to 900MHz band.
  • the operating frequency band corresponding to the second pole can be moved by adjusting the length and width of each induction strip 25 of the radiation inducing unit 20. Therefore, various services can be provided through one monopole antenna by expanding the operating frequency bandwidth of the monopole antenna.
  • FIG. 6 is a view illustrating radiation patterns in the first antenna operation mode of the monopole antenna according to exemplary embodiments of the present invention.
  • the radiation patterns of the first antenna operation mode formed in 900MHz band are omnidirectional, which is a characteristic of the general monopole antenna.
  • FIG. 7 is a view illustrating radiation patterns in the second antenna operation mode of the monopole antenna according to exemplary embodiments of the present invention.
  • the radiation patterns of the second antenna operation mode formed in 1.2GHz band are omnidirectional.
  • the monopole antenna since the monopole antenna has the omnidirectional characteristic required in the mobile communication terminal, it is applicable to the mobile communication terminal.
  • the radiation inducing unit 20 is mounted as a shaped structure.
  • a radiation inducing unit 70 can be formed by coating a conductive paint on an inside surface of a casing 50 of a mobile communication terminal.
  • FIG. 4 shows the casing 50 mounted on the rear surface.
  • the conductive paint is coated in a band shape on the top end of the rear casing 50 along the circumference of the rear casing 50.
  • a conductive paint is coated in a band shape on a front casing (not shown).
  • the conductive paint is downwardly coated on one side of the rear casing 50.
  • the downwardly-extended part contacts a ground 80 formed on a circuit board, thereby forming the radiation inducing unit 70 operated as described above.
  • the radiation inducing unit 70 When the paint is not coated on the side of the casing 50 adjacent to a radiating unit 60, the radiation inducing unit 70 is formed with a ⁇ -shaped section, and when the paint is coated on the side of the casing 50 adjacent to the radiating unit 60, the radiation inducing unit 70 is formed in a closed loop shape.
  • the monopole antenna generates the additional antenna operation mode besides the existing antenna operation mode, by forming the radiation inducing unit 20 or 70 in the simple structure shape or by using the conductive paint. Since the existing antenna operation mode and the additional antenna operation mode are adjacent to each other, the operating frequency bandwidth of the monopole antenna is expanded.
  • the monopole antenna As the bandwidth of the monopole antenna is expanded, the monopole antenna is less sensitive to variations of the surrounding environment, thereby improving reliability. Moreover, the monopole antenna can provide services included in the expanded bandwidth.
  • various services can be provided through one antenna by expanding the operating frequency bandwidth.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Claims (12)

  1. Monopolantenne, die Folgendes umfasst:
    eine Abstrahlungseinheit (10) zum Abstrahlen von elektromagnetischen Wellen und
    eine Erdung (30), wobei die Abstrahlungseinheit (10) mit einer Seite des oberen Endabschnittes der Erdung verbunden ist, wobei die eine Seite gegenüberliegende Seitenenden hat, und
    eine Strahlungsinduktionseinheit (20), die mit der Erdung (30) verbunden ist und ein Paar von Induktionsstreifen (25, 70) umfasst, wobei sich jeder Induktionsstreifen zwischen den gegenüberliegenden Seitenenden auf dem oberen Endabschnitt der Erdung in einem vorbestimmten Abstand erstreckt, wobei die Induktionsstreifen zu der Abstrahlungseinheit zeigen und parallel zueinander in einem vorbestimmten Abstand angeordnet sind, der größer ist als die Dicke der Abstrahlungseinheit (10) derart, dass sich die Induktionsstreifen, die zu der Abstrahlungseinheit zeigen, auf gegenüberliegenden Seiten der Abstrahlungseinheit befinden und von der Abstrahlungseinheit isoliert sind.
  2. Monopolantenne nach Anspruch 1, wobei das Paar von Induktionsstreifen (25, 70) jeweils erste Verbindungseinheiten (27) umfasst, die an ersten Enden gegenüber der Abstrahlungseinheit (10) in einer Längsrichtung geformt sind, wobei die ersten Verbindungseinheiten miteinander verbunden sind.
  3. Monopolantenne nach Anspruch 2, wobei die ersten Verbindungseinheiten (27) so ausgedehnt sind, dass sie einen Kontakt mit der Erdung (30) herstellen.
  4. Monopolantenne nach Anspruch 1, wobei das Paar von Induktionsstreifen (25, 70) jeweils zweite Verbindungseinheiten (28) umfasst, die an zweiten Enden angrenzend an die Abstrahlungseinheit (10) in einer Längsrichtung geformt sind, wobei die zweiten Verbindungseinheiten miteinander verbunden sind.
  5. Monopolantenne nach Anspruch 1, wobei das Paar von Induktionsstreifen (25) aus einer rechteckigen Leitertafel hergestellt ist, die zu einer Richtung ausgedehnt ist.
  6. Monopolantenne nach Anspruch 1, wobei das Paar von Induktionsstreifen (25) aus einem Leiterdraht hergestellt ist.
  7. Monopolantenne nach einem der Ansprüche 1 bis 6, wobei die Gesamtlänge des Paares von Induktionsstreifen (25) etwa λ/4 beträgt.
  8. Monopolantenne nach einem der Ansprüche 1 bis 7, wobei die Abstrahlungseinheit (10) zwischen jedem Induktionsstreifen (25, 70) und der Erdung (30) mit Strom versorgt wird.
  9. Monopolantenne nach Anspruch 4, wobei die Abstrahlungseinheit (10) eine Peitschenantenne ist und die zweiten Enden der Induktionsstreifen (25) bis zu der Abstrahlungseinheit (10) ausgedehnt und in einem vorbestimmten Abstand von der Abstrahlungseinheit angeordnet sind.
  10. Mobiles Kommunikationsendgerät, das eine Monopolantenne hat, wobei es Folgendes umfasst:
    eine Monopolantenne nach einem der vorhergehenden Ansprüche, wobei die Strahlungsinduktionseinheit (20) geformt ist durch das Auftragen einer leitfähigen Farbe (70) längs einer Innenfläche eines Gehäuses (50) des Endgerätes in der Längsrichtung der Abstrahlungseinheit (10) und mit der Erdung (30) verbunden ist.
  11. Mobiles Kommunikationsendgerät nach Anspruch 10, wobei das Gehäuse (70) ein vorderes Gehäuse und ein hinteres Gehäuse umfasst und die Strahlungsinduktionseinheit (20) auf den Innenumfängen des vorderen Gehäuses und des hinteren Gehäuses geformt ist.
  12. Mobiles Kommunikationsendgerät nach Anspruch 10 oder 11, wobei die auf der Seite des Gehäuses aufgetragene Strahlungsinduktionseinheit (20) einen Kontakt mit einer als Erdung geformten Leiterplatte herstellt.
EP06126716A 2006-07-26 2006-12-20 Monopolantenne mit erweiterter Bandbreite und tragbares Kommunikationsendgerät mit derselben Not-in-force EP1885021B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020060070262A KR100842081B1 (ko) 2006-07-26 2006-07-26 대역폭이 증가된 모노폴 안테나 및 이를 구비한 이동통신단말기

Publications (2)

Publication Number Publication Date
EP1885021A1 EP1885021A1 (de) 2008-02-06
EP1885021B1 true EP1885021B1 (de) 2012-05-30

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ID=38567057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06126716A Not-in-force EP1885021B1 (de) 2006-07-26 2006-12-20 Monopolantenne mit erweiterter Bandbreite und tragbares Kommunikationsendgerät mit derselben

Country Status (2)

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EP (1) EP1885021B1 (de)
KR (1) KR100842081B1 (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2257838B (en) * 1991-07-13 1995-06-14 Technophone Ltd Retractable antenna
US5300936A (en) 1992-09-30 1994-04-05 Loral Aerospace Corp. Multiple band antenna
SE508365C2 (sv) * 1996-11-04 1998-09-28 Ericsson Telefon Ab L M Radiotelefon med hög antenneffektivitet
JP3821039B2 (ja) 2002-04-09 2006-09-13 株式会社デンソー アンテナ装置
JP2006510321A (ja) * 2002-12-22 2006-03-23 フラクタス・ソシエダッド・アノニマ 移動通信デバイス用のマルチバンド・モノポール・アンテナ
US7280856B2 (en) * 2003-05-24 2007-10-09 Samsung Electronics Co., Ltd. Portable terminal having tuner for changing radiation pattern
US7277058B2 (en) * 2004-12-30 2007-10-02 Motorola, Inc. Wireless communication device antenna for improved communication with a satellite

Also Published As

Publication number Publication date
KR100842081B1 (ko) 2008-06-30
KR20080010152A (ko) 2008-01-30
EP1885021A1 (de) 2008-02-06

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