EP1570544A1 - Structure d'antenne pour deux bandes de frequences se chevauchant - Google Patents

Structure d'antenne pour deux bandes de frequences se chevauchant

Info

Publication number
EP1570544A1
EP1570544A1 EP03779707A EP03779707A EP1570544A1 EP 1570544 A1 EP1570544 A1 EP 1570544A1 EP 03779707 A EP03779707 A EP 03779707A EP 03779707 A EP03779707 A EP 03779707A EP 1570544 A1 EP1570544 A1 EP 1570544A1
Authority
EP
European Patent Office
Prior art keywords
antenna structure
antenna
branches
structure according
frequency bands
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Withdrawn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
EP03779707A
Other languages
German (de)
English (en)
Inventor
Sheng-Gen Pan
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.)
Palm Inc
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1570544A1 publication Critical patent/EP1570544A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H01Q5/35—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using two or more simultaneously fed points
    • 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
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • 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 invention relates to an antenna structure in a substantially flat construction with a ground terminal and at least one RF feed terminal, which is designed for use for at least two frequency bands.
  • dual-band antennas are known, which are referred to by the term "dual-band antennas.”
  • Such dual-band antennas are designed to be suitable for radiating and receiving within two remote cellular radio frequency bands, a typical example being one Dual-band antenna that works for the GSM 900 and GSM 1800 standard radio frequency bands, these two frequency bands do not overlap with each other, and the resulting antenna adjustments are concentrated around the relevant center frequencies of the standard mobile radio frequency bands.
  • Antenna has a large reactance near its resonance frequencies.
  • the antenna volume can be increased, resulting in broadband resonances. However, this has the
  • Disadvantage is to provide more space for the antenna volume just within a mobile phone.
  • the invention has the object, an antenna structure of the type mentioned in such a way that it requires a small antenna volume, while the two frequency bands show a suitable overlap.
  • an antenna structure in a substantially flat construction with a ground terminal and at least one RF feed terminal, which is designed for use for at least two frequency bands, wherein the antenna structure from a footer comprising the ground terminal, two antenna branches, in the foot area two spaced RF feed ports are provided and the two antenna branches of the antenna structure are formed such that their respective frequency bands overlap.
  • the broadband nature of the intended antenna structure is due to the fact that two RF feed ports arranged at a distance from one another are provided, whose exact position at the foot point can be adjusted such that a suitable overlap results between the two frequency bands.
  • the actual shape of the antenna branches of the antenna structure can be chosen arbitrarily, it being considered as a boundary condition that the respective antenna branch is suitably designed for a resonant frequency associated with it, which defines its frequency range.
  • the antenna structure can be used as an internal antenna for mobile phones.
  • the antenna structure may be formed as a planar, inverted F-structure (PIFA).
  • the antenna structure is characterized by a particularly low volume when the two antenna branches of the antenna structure are each formed meandering.
  • the antenna branches can be arranged next to each other, so that the two meander-shaped antenna branches each define an associated antenna surface, wherein the resulting two antenna surfaces are at a distance from one another.
  • the two antenna branches may be in the form of a double meander, in which the respective meander of a ⁇ ntennenzweiges engages the meander of the other antenna branch, so that the two antenna branches are substantially parallel to each other.
  • the distance between the two meandering antenna branches may be in the range between 0.5 and 10 mm, which also leads to a volume-saving antenna structure, which is used in mobile phones as an internal antenna structure.
  • the distance between the two RF feed ports may be in the range of 5 to 30 mm with the location of the RF feed ports and their distance from each other and to the ground terminal respectively matched to the desired frequency bands for the two antenna branches.
  • the antenna structure can have an excitation circuit with an HF supply line which is branched to the two RF supply connections. In this way, the same excitation signal is present at both RF supply terminals.
  • the antenna structure is designed for the cellular standard frequency ranges GSM 850 and EGSM 900, the two overlapping frequency ranges yielding a broadband spectrum comprising the two standard frequency ranges.
  • GSM 1800 and EGSM 1900 A design for the mobile radio frequency bands GSM 1800 and EGSM 1900 is also possible, wherein an adaptation of the dimensions of the antenna branches has to be made.
  • FIG. 1 is a schematic overview of a general antenna structure
  • FIG. 2 is a schematic representation of a first embodiment of the antenna structure of FIG. 1;
  • FIG. 3 shows an antenna adaptation of the antenna structure of FIG. 3
  • FIG. 2 shows another embodiment of the antenna structure of FIG. 1 and FIG. 5 shows a further embodiment of the antenna structure of FIG. 1.
  • FIG. 1 shows in a schematic way the general structure of an antenna structure which is designed for radiating and receiving in the range of two mutually adjacent mobile radio frequency ranges.
  • the antenna surface which is occupied by radiation-relevant elements of the antenna structure is generally indicated by the reference symbol "A" in Figure 1.
  • a foot region F of the antenna structure there are two RF supply connections P1, P3, between which a ground connection P2 is provided RF supply ports Pl, P3 are in communication with a connection point S for an RF signal, from which an excitation circuit supply line C branches to the RF supply ports Pl, P3.
  • the distance between the two arranged in the foot area F RF feed points Pl, P3 is in the range between 5 and 30 mm.
  • the distance between the antenna surface A and a base plate (not shown), which is substantially parallel to the antenna surface A, is in the range between 4 and 7 mm.
  • Embodiment of an antenna structure is a known PIFA antenna structure, d. H. the structure shown falls under the above-mentioned generic term.
  • the antenna surface A is concretized in terms of its structure.
  • the antenna structure has two antenna branches ZI, Z2, which are respectively maander-shaped and interlock, so that the external shape of a double meander is formed.
  • This outer shape of the two antenna branches ZI, Z2 leads to a small volume for the antenna structure as a whole.
  • the edge lengths are 3.6 cm (width), 1.8 cm (length) and 0.6 cm (height).
  • the width of the two antenna branches ZI, Z2 is 2 mm, while the distance between the two antenna branches ZI, Z2 is selected to be 4 mm (center to center).
  • the lengths of the two meandering antenna branches ZI, Z2 are 98 mm and 86 mm, with respect to the ground terminal P2. These lengths correspond to a value of lambda / 4 for each of the middle wavelengths of the two associated frequency ranges, one of which relates to the mobile radio standard GSM 850 and the other to the standard mobile radio frequency range EGSM 900.
  • the distance between the RF supply terminal P1 and the ground terminal P2 in the antenna structure of FIG. 2 is 6 mm, while the distance between the RF supply terminal P3 and the ground terminal P2 is 4 mm.
  • the line C which connects the two RF supply ports Pl, P3, has a length of 14 mm.
  • the line C is arranged on the base plate, so that the resulting two ends of the line C via contact springs (not shown) are connected to the RF supply ports Pl, P3.
  • the Contact springs have for the embodiment of Figure 2 has a length of about 6 to 7 mm.
  • the distance between the electromagnetically coupled, meandering antenna branches ZI, Z2 can be in the range of 0.5 to 10 mm. This also applies to the later explained embodiment of an antenna structure according to FIGS. 4 and 5.
  • Figure 3 shows an adaptation of the explained with reference to Figure 2 antenna structure, which is a calculated dependence between a
  • Reflection coefficients Su and a frequency is.
  • the two relevant standard mobile radio frequency ranges for GSM 850 and EGSM 900 are indicated by dashed lines in FIG. 3. It can be seen that the antenna structure of Figure 2 with coupled, meandering, intermeshing antenna branches ZI, Z2 shows a broadband spectrum, the minimum for the reflection coefficient is about 6 dB. Such a frequency response for the
  • Reflection coefficient Su is readily satisfactory for the requirements in the mobile communications sector.
  • FIG. 4 shows a further embodiment of an antenna structure in which the two
  • Antenna branches ZI, Z2 also have a meandering shape, but deviating from the embodiment of Figure 2, are arranged side by side.
  • the antenna structure of Figure 4 requires a little more volume, but can be made easier and easier to set than the
  • the distance between the two antenna branches ZI, Z2 in the antenna structure according to FIG. 4 is between 0.5 and 10 mm, this distance being defined as the smallest distance between the two antenna branches ZI, Z2.
  • the antenna structure of Figure 4 compared to the antenna structure of Figure 2 (3.9 cm 3 ), requires a volume of 4.5 cm 3 , which corresponds to the edge lengths 3.6 cm (width), 2.1 cm (length) and 0.6 cm (height) corresponds.
  • FIG. 5 shows a further antenna structure, which is common to the antenna structures of FIGS. 2 and 4, in that the two RF feed ports P3, Pl are provided at a distance from one another, whereby the line C is also in the same form as in the embodiments according to Figures 2 and 4.
  • the antenna structure also has the two antenna branches ZI, Z2, which vary in their width over their length and are electromagnetically coupled.
  • the embodiments shown here relate to the adjacent standard mobile frequency ranges for GSM 850 and EGSM 900.
  • the exemplary embodiments can be readily transferred to antenna structures which are to have overlapping frequency ranges for the standard mobile radio frequency ranges GSM 1800 and EGSM 1900.

Landscapes

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

Abstract

L'invention concerne une structure d'antenne de conception sensiblement plate, comportant une borne de connexion à la terre (P2) et au moins une borne d'alimentation HF (P1), ladite structure d'antenne étant utilisée pour au moins deux bandes de fréquence. Cette structure d'antenne présente deux branches (Z1, Z2) qui partent d'une zone inférieure (F) comportant la borne de connexion à la terre. Deux bornes d'alimentation HF (P1, P3), disposées à distance l'une de l'autre, sont placées dans la zone inférieure (F). Les deux branches (Z1, Z2) de la structure d'antenne sont conçues de sorte que leurs bandes de fréquences respectives se chevauchent.
EP03779707A 2002-12-12 2003-11-18 Structure d'antenne pour deux bandes de frequences se chevauchant Withdrawn EP1570544A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10258184 2002-12-12
DE10258184A DE10258184A1 (de) 2002-12-12 2002-12-12 Antennenstruktur für zwei überlappende Frequenzbänder
PCT/DE2003/003821 WO2004054036A1 (fr) 2002-12-12 2003-11-18 Structure d'antenne pour deux bandes de frequences se chevauchant

Publications (1)

Publication Number Publication Date
EP1570544A1 true EP1570544A1 (fr) 2005-09-07

Family

ID=32477596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03779707A Withdrawn EP1570544A1 (fr) 2002-12-12 2003-11-18 Structure d'antenne pour deux bandes de frequences se chevauchant

Country Status (4)

Country Link
US (1) US7737909B2 (fr)
EP (1) EP1570544A1 (fr)
DE (1) DE10258184A1 (fr)
WO (1) WO2004054036A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD588116S1 (en) * 2007-09-06 2009-03-10 Advanced Automotive Antennas, S.L. Aerial
US8928532B2 (en) * 2011-03-07 2015-01-06 Shenzhen Aimic Technology Inc. Radiation component of miniature antenna
JP5859139B2 (ja) 2012-10-24 2016-02-10 株式会社ソニー・コンピュータエンタテインメント アンテナ装置及び携帯情報端末
WO2015074248A1 (fr) * 2013-11-22 2015-05-28 华为终端有限公司 Antenne
TWI765743B (zh) * 2021-06-11 2022-05-21 啓碁科技股份有限公司 天線結構

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5589873A (en) 1972-10-05 1974-11-21 Antenna Eng Australia Low-profile antennas low-profile antennas
US4835538A (en) * 1987-01-15 1989-05-30 Ball Corporation Three resonator parasitically coupled microstrip antenna array element
DE4423191B4 (de) * 1994-07-01 2004-05-13 Heinz Prof. Dr.-Ing. Lindenmeier Fensterscheibenantenne mit extremer Bandbreite für Kraftfahrzeuge
JP3296189B2 (ja) * 1996-06-03 2002-06-24 三菱電機株式会社 アンテナ装置
EP0884796A3 (fr) * 1997-06-11 1999-03-24 Matsushita Electric Industrial Co., Ltd. Antenne comprenant de portions courbés ou incurvés
IL135848A0 (en) * 1997-10-28 2001-05-20 Ericsson Telefon Ab L M Multiple band, multiple branch antenna for mobile phone
KR20010023541A (ko) * 1998-07-02 2001-03-26 마츠시타 덴끼 산교 가부시키가이샤 안테나장치 및 통신기 시스템, 디지털 텔레비전방송수신장치
JP3639767B2 (ja) * 1999-06-24 2005-04-20 株式会社村田製作所 表面実装型アンテナおよびそれを用いた通信機
DE10050902A1 (de) * 2000-10-13 2002-04-25 Alcatel Sa Antennenanordnung für Mobiltelefone
EP1376761B1 (fr) * 2001-03-15 2007-11-14 Matsushita Electric Industrial Co., Ltd. Dispositif d'antenne

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2004054036A1 *

Also Published As

Publication number Publication date
DE10258184A1 (de) 2004-07-15
US20060152429A1 (en) 2006-07-13
US7737909B2 (en) 2010-06-15
WO2004054036A1 (fr) 2004-06-24

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