EP1086509A1 - Ensemble antenne et appareil radio - Google Patents

Ensemble antenne et appareil radio

Info

Publication number
EP1086509A1
EP1086509A1 EP99907284A EP99907284A EP1086509A1 EP 1086509 A1 EP1086509 A1 EP 1086509A1 EP 99907284 A EP99907284 A EP 99907284A EP 99907284 A EP99907284 A EP 99907284A EP 1086509 A1 EP1086509 A1 EP 1086509A1
Authority
EP
European Patent Office
Prior art keywords
operating frequency
frequency range
antenna arrangement
reference potential
impedance
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.)
Granted
Application number
EP99907284A
Other languages
German (de)
English (en)
Other versions
EP1086509B1 (fr
Inventor
Markus Hoffmeister
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.)
Ipcom GmbH and Co KG
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1086509A1 publication Critical patent/EP1086509A1/fr
Application granted granted Critical
Publication of EP1086509B1 publication Critical patent/EP1086509B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable
    • 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
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/328—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors between a radiating element and ground
    • 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
    • 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
    • H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means

Definitions

  • the invention is based on an antenna arrangement according to the category of independent claim 1 and on a radio device according to the category of independent claim 14.
  • a dual-frequency planar inverted-F antenna which comprises a radiator element, a plurality of reference potential connections and a feed connection, the radiator element in a first operating frequency range at approximately 1.8 GHz and in a second, different from the first operating frequency range
  • Operating frequency range is resonant at about 0.9 GHz, whereby the radiator element is fed via the feed connection either with signals in the first operating frequency range or in the second operating frequency range.
  • the antenna arrangement according to the invention with the features of independent claim 1 has the advantage that the reference potential connection is connected via a first impedance to the reference potential of a reference potential area and that the first impedance in the first operating frequency range is high impedance and in the second Operating frequency range is low.
  • the frequency-selective termination of the reference potential connection ensures that the radiator element or the antenna arrangement is resonant and radiates well both in the first operating frequency range and in the second operating frequency range. No precautions are required for the radiator element, such as an L-shaped incision to form two radiating sub-elements, so that the outlay for producing the antenna arrangement and the associated costs can be kept low.
  • the first impedance is designed as a line, the length of which is selected so that the impedance of the line is low-resistance in the second operating frequency range and high-resistance in the first operating frequency range, the second operating frequency range comprising frequencies which are approximately half as large as that Frequencies of the first operating frequency range are.
  • the length of the line corresponds to approximately a quarter of the operating wavelengths of the second operating frequency range and the line runs empty.
  • the line forms a short circuit for the second operating frequency range and an open circuit for the first operating frequency range between the reference potential connection and the reference potential.
  • the same advantage is achieved by using a resonance circuit for the first impedance, the resonance frequency of which lies approximately in the second operating frequency range and thus represents a particularly low-impedance impedance in the second operating frequency range, and which is high-impedance for frequencies of the first operating frequency range.
  • the first impedance is designed as a semiconductor component, preferably as a PIN diode. In this way, there is no dependence of the first impedance on the frequencies of the two selected operating frequency ranges and the antenna can be switched electronically between its operating frequencies.
  • Another advantage is that the length of the radiating element, the height of the feed connection and the reference potential connection of the antenna arrangement and the distance between the feed connection and the reference potential connection are selected such that the input resistance of the antenna arrangement at the feed connection is approximately the same for both operating frequency ranges.
  • the input resistance of the antenna arrangement can be easily connected to an antenna network for supplying and receiving radio signals by corresponding geometric dimensioning of the antenna arrangement for both operating frequency ranges without impedance transformation, so that components, space and costs are saved.
  • Another advantage is that a second impedance is provided which transforms an output resistance of an antenna network so that it is in both Operating frequency ranges is adapted to the respective input resistance of the antenna arrangement at the feed connection. In this way, an impedance match between the output resistance of the antenna network and the input resistance of the
  • the second impedance is designed as a line, the length of which corresponds to a quarter of the operating wavelengths of the second operating frequency range, the second operating frequency range
  • Frequencies included which are about half as large as the frequencies of the first operating frequency range. In this way, the second impedance can be implemented particularly easily and with little effort.
  • radiator element is angled. In this way, the antenna arrangement can be downsized and space can be saved without the antenna effect being reduced.
  • the antenna arrangement is embedded in a material whose dielectric constant is significantly greater than 1. In this way, the antenna can also be reduced in size and space can be saved without the antenna effect being significantly reduced.
  • an antenna arrangement according to the invention in a radio device according to independent claim 14 is particularly advantageous operate in a simple, low-cost, cost-saving and space-saving manner in two different operating frequency ranges without the antenna effect being reduced in the two operating frequency ranges.
  • FIG. 1 shows a first embodiment of a radio with an antenna arrangement according to the invention
  • FIG. 2 shows a second embodiment of a radio with an antenna arrangement according to the invention
  • FIG. 3 shows a third embodiment of a radio with an inventive
  • Figure 4 is an angled radiator element and Figure 5 is a flow chart for a control of the radio.
  • 70 denotes a radio which can be designed, for example, as a mobile or cordless telephone, as a handheld radio, company radio, or the like.
  • the radio 70 includes a circuit board, the one
  • the radio device 1 further comprises an antenna arrangement 1 with a radiating element 5, which comprises a feed terminal 10 and a reference potential terminal 15, each approximately the same length, perpendicular to the radiating element 5.
  • the reference potential connection 15 is arranged at one end of the radiator element 5, the other end of which is free.
  • the feed connection 10 is in the Center of the radiator element 5 and the reference potential terminal 15 is arranged.
  • the feed connection 10 can also be arranged between the center of the radiator element 5 and the reference potential connection 15.
  • the antenna arrangement 1 is in a first
  • the antenna 80 formed from the radiator element 5, the feed connection 10 and the reference potential connection 15 is of F-shaped design, the two transverse bars being
  • the antenna 80 is therefore referred to as an inverted-F antenna and, due to its operability in two different operating frequency ranges, as a dual-frequency inverted-F antenna (DF-IFA).
  • DF-IFA dual-frequency inverted-F antenna
  • the reference potential connection 15 is connected via a first impedance designed as a first line 20 to the
  • the length of the first line 20 is chosen so that the impedance of the first line 20 is low-resistance in the second operating frequency range and high-resistance in the first operating frequency range, the second Operating frequency range includes frequencies that are approximately half as large as the frequencies of the first operating frequency range.
  • the length of the first line 20 can correspond to about a quarter of the operating wavelengths of the second operating frequency range if it is idle. This results in a very low-resistance connection of the reference potential connection 15 to the reference potential 25 for the frequencies of the second operating frequency range. In contrast, there is a very high-resistance connection of the frequencies for the first operating frequency range
  • the described frequency-selective termination of the reference potential connection 15 by the first line 20 ensures that the antenna 80 is resonant both in the first and in the second operating frequency range and has good radiation properties.
  • the first line 20 is designed, for example, as a strip, microstrip or coaxial line, the inner conductor of which is connected to the reference potential connection 15 and the outer conductor of which is connected to the reference potential 25.
  • the feed connection 10 is connected via a second impedance designed as a second line 60 to an antenna network 75 to which a controller 85 is connected.
  • the controller 85 is also connected to an input unit 90 which has an operating element 95.
  • the second line 60 can also be designed as a strip, microstrip or coaxial line, the inner conductor of which is connected on the one hand to the feed connection 10 and on the other hand is connected to the antenna network 75 and the outer conductor of which is connected to the reference potential 25.
  • the second line 60 transforms an output resistance of the antenna network 75, so that it is in the two operating frequency ranges at the respective
  • Input resistance of the antenna arrangement 1 at the feed connection 10 is adapted.
  • the input resistance of the antenna arrangement 1 at the feed connection 10 is dependent on the operating frequency used and the geometry of the antenna 80.
  • the length of the second line 60 also corresponds to approximately a quarter of the operating wavelengths of the second operating frequency range. In the event that the output resistance of the antenna network 75 is 50 ⁇ and that the input resistance of the antenna arrangement 1 am
  • Infeed connection 10 in the second operating frequency range is 30 ⁇ , there is an adaptation of the output resistance of the antenna network 75 to the input resistance of the wave resistance of the second line 60 in the second operating frequency range of v30 * 50 ⁇
  • Antenna arrangement 1 at the feed connection 10 in the second operating frequency range In the first operating frequency range, however, the input resistance of the antenna arrangement 1 at the feed connection 10 is 50 ⁇ . Since the length of the second line 60 in the first operating frequency range corresponds to half the operating wavelengths of the first operating frequency range, the output resistance of the antenna network 75 of 50 ⁇ is mapped to itself in the first operating frequency range by the second line 60 and is therefore also related to the input resistance of the
  • Antenna arrangement 1 adapted to the feed connection 10 in the first operating frequency range.
  • the geometrical dimensions of the antenna 80 are to be selected so that in the first operating frequency range Input resistance of the antenna arrangement 1 at the feed connection 10 is 50 ⁇ and 30 ⁇ in the second operating frequency range.
  • the first line 20 is replaced by a resonance circuit 35, the resonance frequency of which lies approximately in the second operating frequency range, so that it connects the reference potential connection 15 to the reference potential 25 in a low-resistance manner in the second operating frequency range.
  • resonance circuit 35 connects reference potential connection 15 to the reference potential 25 in a high-resistance manner. Such a frequency-selective termination of reference potential connection 15 by resonance circuit 35 also achieves that radiator element 5 and antenna 80 both in the first and in the second operating frequency range is resonant and has good radiation properties.
  • the antenna network 75 is connected directly to the feed connection 10 of the antenna 80.
  • the length 45 of the radiator element 5, the height 50 of the feed connection 10 and the reference potential connection 15 and the distance 55 between the feed connection 10 and the reference potential connection 15 are selected such that the input resistance of the antenna arrangement 1 at the feed connection 10 is approximately the same for both operating frequency ranges .
  • the length 45 of the radiating element 5 is approximately 80 mm
  • the height 50 of the feed connection 10 and the reference potential connection 15 is in each case approximately 15 mm
  • the distance 55 between the feed connection 10 and the reference potential connection 15 is approximately 15 mm, so that, for example, both at the first operating frequency range with frequencies between 1.8 GHz and 1.9 GHz and at second operating frequency range with frequencies between 0.9 GHz and IG Hz, the input resistance of the antenna arrangement 1 at the feed connection 10 is 50 ⁇ in each case.
  • the first operating frequency range between 1.8GHz and 1.9GHz is used for example in the E-network in Germany for mobile radio and in accordance with the DECT standard (Digital Enhanced Cordless Telecommunications) for cordless telephony.
  • the second operating frequency range between 0.9GHz and IGHz is used, for example, for mobile telephony in accordance with the GSM standard (Global System for Mobile Communications). Since the input resistance of the antenna arrangement 1 at the feed connection 10 is approximately the same for both operating frequency ranges and the output resistance of the antenna network 75 is 50 ⁇ , an impedance transformation between the antenna network 75 and the feed connection 10 is not necessary.
  • the radio device 70 according to the exemplary embodiment according to FIG. 2 is constructed in exactly the same way as the radio device 70 according to the exemplary embodiment according to FIG. 1.
  • the same geometric dimensions are used for the antenna 80 as in the exemplary embodiment according to FIG. 2, so that no impedance transformation is likewise required between the antenna network 75 and the feed connection 10.
  • the resonance circuit 35 is replaced by a PIN diode 40, the anode of which is connected to the reference potential connection 15 and the cathode of which is connected to the reference potential 25.
  • the controller 85 controls the anode of the PIN diode 40 and that the antenna 80 is embedded in a material 65 whose dielectric constant is significantly greater than 1.
  • a another semiconductor component for example a conventional pn diode or a transistor, which are to be controlled accordingly by the controller 85.
  • the PIN diode 40 is turned into a blocking state by the controller 85 by means of a low-level control signal
  • the PIN diode 40 is switched into a conductive state by the control 85 by a high-level control signal when the radiator element 5 is fed via the feed connection 10 with signals whose frequency is in the second operating frequency range, so that in the second operating frequency range the reference potential connection 15 has a low resistance is connected to the reference potential 25.
  • Dielectric constant which is significantly greater than 1, is achieved in that the geometrical dimensions of the antenna 80 can be reduced with little reduction in the antenna effect.
  • a further downsizing of the antenna 80 results from angling the radiator element 5 according to FIG. 4 at the free end of the radiator element 5.
  • the length of the radiator element 5 is measured as the sum of the lengths 45b of the angled part 205 of the radiator element 5 and the length 45a of the non-angled part 200 of the radiator element 5.
  • the angled portion is approximately rectangular, the angled part 205 can point in any direction.
  • a particularly advantageous embodiment results from angling downwards, the angled part 205 being arranged approximately parallel to the feed connection 10 and to the reference potential connection 15 in the direction of the radio 70.
  • the bend can also be provided perpendicular to the feed connection 10 and to the reference potential connection 15, the angled part 205 and the non-angled part 200 lying approximately in one plane, as shown in FIG.
  • FIG. 5 shows a flowchart for the functioning of the controller 85 of the radio 70.
  • the controller 85 checks whether received signals have been transmitted to the antenna network 75 via the antenna 80, which also acts as a receiving antenna, and whose frequency is in the first operating frequency range lies. If this is the case, the program branches to a program point 105, otherwise the program branches to a program point 120.
  • the controller 85 causes the antenna network 75 to use a frequency in the first operating frequency range for the transmission of signals via the antenna 80 after being fed in via the
  • the PIN diode 40 is driven at low level by the controller 85, so that the reference potential connection 15 is connected to the reference potential 25 in a high-resistance manner.
  • the program then branches to a program point 110.
  • the controller 85 checks whether the existing radio connection has been terminated by a user, for example via the input unit 90. If this is the case, the program part is left, otherwise the program branches to a program point 115. at Program point 115 will go through a waiting loop. The program then branches back to program point 110.
  • the controller 85 checks whether the user wishes to establish a connection in the first operating frequency range by actuating the control element 95 accordingly.
  • controller 85 checks whether a radio signal has been received via antenna 80 in antenna network 75, the frequency of which is in the second operating frequency range. If this is the case, the program branches to a program point 130, otherwise the program branches to a program point 135. At program point 130, the controller 85 causes the antenna network 75 to use a frequency in the second operating frequency range for the transmission of
  • the controller 85 controls the PIN diode 40 with a high-level control signal in accordance with the exemplary embodiment according to FIG. 3, so that the PIN diode 40 is switched over to the conductive state and the reference potential connection 15 also has a low resistance connects the reference potential 25.
  • the program then branches to program point 110.
  • the controller 85 checks whether the user wishes to establish a connection in the second operating frequency range by actuating the control element 95 accordingly. If this is the case, the program branches to program point 130, otherwise the program part is exited.
  • the antenna 80 is suitable for operation in two different operating frequency ranges. Because of the low
  • the antenna 80 can for example be integrated into a handset housing or a flat base station housing.
  • the antenna arrangement 1 is therefore not limited to use with a radio.
  • a length of, for example, 100-200 mm is selected for the reference potential area 30 as a counterweight to the antenna 80 according to the exemplary embodiments described.

Landscapes

  • Waveguide Aerials (AREA)
  • Support Of Aerials (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

Ensemble antenne (1) qui peut fonctionner dans deux gammes de fréquence d'utilisation différentes. Ladite antenne (1) comporte un élément rayonnant (5) doté d'une borne d'alimentation (10) et d'une borne de potentiel de référence (15). L'élément rayonnant (5) est résonant dans une première gamme de fréquence et dans une seconde gamme de fréquence différente de la première et peut être sélectivement alimenté via la borne d'alimentation (10) en signaux appartenant à la première ou à la seconde gamme de fréquence. La borne de potentiel de référence (15) est reliée par une première impédance (20, 35, 40) au potentiel de référence (25) d'une surface (30) de potentiel de référence. La première impédance (20, 35, 40) est fortement résistante dans la première gamme de fréquence d'utilisation et faiblement résistante dans la seconde gamme de fréquence d'utilisation. La présente invention concerne en outre un appareil radio (70) doté d'un ensemble antenne (1) selon la présente invention.
EP99907284A 1998-05-19 1999-01-27 Ensemble antenne et appareil radio Expired - Lifetime EP1086509B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19822371.4A DE19822371B4 (de) 1998-05-19 1998-05-19 Antennenanordnung und Funkgerät
DE19822371 1998-05-19
PCT/DE1999/000199 WO1999060662A1 (fr) 1998-05-19 1999-01-27 Ensemble antenne et appareil radio

Publications (2)

Publication Number Publication Date
EP1086509A1 true EP1086509A1 (fr) 2001-03-28
EP1086509B1 EP1086509B1 (fr) 2007-07-18

Family

ID=7868246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99907284A Expired - Lifetime EP1086509B1 (fr) 1998-05-19 1999-01-27 Ensemble antenne et appareil radio

Country Status (5)

Country Link
US (1) US6518922B1 (fr)
EP (1) EP1086509B1 (fr)
JP (1) JP4112178B2 (fr)
DE (2) DE19822371B4 (fr)
WO (1) WO1999060662A1 (fr)

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GB0013156D0 (en) * 2000-06-01 2000-07-19 Koninkl Philips Electronics Nv Dual band patch antenna
EP1763106B1 (fr) * 2000-11-22 2008-12-31 Panasonic Corporation Antenne incorporée pour un appareil de radiotéléphonie
GB0105441D0 (en) * 2001-03-03 2001-04-25 Koninkl Philips Electronics Nv Antenna arrangement
GB0105440D0 (en) * 2001-03-06 2001-04-25 Koninkl Philips Electronics Nv Antenna arrangement
FR2825518A1 (fr) * 2001-06-01 2002-12-06 Socapex Amphenol Antenne a plaque
US6639564B2 (en) 2002-02-13 2003-10-28 Gregory F. Johnson Device and method of use for reducing hearing aid RF interference
US7265731B2 (en) * 2004-12-29 2007-09-04 Sony Ericsson Mobile Communications Ab Method and apparatus for improving the performance of a multi-band antenna in a wireless terminal
JP4707495B2 (ja) * 2005-08-09 2011-06-22 株式会社東芝 アンテナ装置および無線装置
JP5442392B2 (ja) * 2009-10-28 2014-03-12 京セラ株式会社 携帯端末
CN102158245B (zh) * 2011-01-26 2013-10-02 惠州Tcl移动通信有限公司 一种多频段手机
US9502776B2 (en) * 2012-04-09 2016-11-22 Maxtena Antenna surrounded by metal housing
US20140361941A1 (en) * 2013-06-06 2014-12-11 Qualcomm Incorporated Multi-type antenna
TWI531117B (zh) * 2013-12-26 2016-04-21 宏碁股份有限公司 行動通訊裝置

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JPH02308604A (ja) * 1989-05-23 1990-12-21 Harada Ind Co Ltd 移動通信用平板アンテナ
JPH03228407A (ja) * 1989-12-11 1991-10-09 Nec Corp アンテナおよび該アンテナを用いた携帯用無線機
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FR2709604B1 (fr) * 1993-09-02 1995-10-20 Sat Antenne pour appareil radio portatif.
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Also Published As

Publication number Publication date
JP4112178B2 (ja) 2008-07-02
WO1999060662A1 (fr) 1999-11-25
DE19822371A1 (de) 1999-11-25
JP2002516505A (ja) 2002-06-04
DE19822371B4 (de) 2018-03-08
EP1086509B1 (fr) 2007-07-18
DE59914417D1 (de) 2007-08-30
US6518922B1 (en) 2003-02-11

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