EP1086509B1 - Ensemble antenne et appareil radio - Google Patents

Ensemble antenne et appareil radio Download PDF

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Publication number
EP1086509B1
EP1086509B1 EP99907284A EP99907284A EP1086509B1 EP 1086509 B1 EP1086509 B1 EP 1086509B1 EP 99907284 A EP99907284 A EP 99907284A EP 99907284 A EP99907284 A EP 99907284A EP 1086509 B1 EP1086509 B1 EP 1086509B1
Authority
EP
European Patent Office
Prior art keywords
operating frequency
frequency range
antenna
impedance
reference potential
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.)
Expired - Lifetime
Application number
EP99907284A
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German (de)
English (en)
Other versions
EP1086509A1 (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
Ipcom GmbH and Co KG
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 Ipcom GmbH and Co KG filed Critical Ipcom GmbH and Co KG
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

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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
    • H01Q9/06—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 preamble of independent claim 1 and of a radio device according to the preamble of independent claim 7.
  • a dual-frequency planar inverted-F antenna comprising a radiating element, a plurality of reference potential terminals and a feed terminal, wherein the radiating element in a first operating frequency range at about 1.8 GHz and in a second, different from the first operating frequency range operating frequency range at about 0th 9GHz is resonant, whereby the radiating element is fed via the feed connection optionally with signals in the first operating frequency range or in the second operating frequency range.
  • From the EP 0 687 030 A1 is an antenna arrangement with a radiator element comprising a feed terminal and a reference potential terminal known.
  • a capacitor can be connected via a diode so that the resonance frequency of the antenna arrangement can be changed.
  • the JP 62 279 704 A shows an antenna arrangement for two-frequency operation.
  • the EP 0630 069 A1 shows an inverted F antenna arrangement, which has resonance behavior in two frequency ranges by means of a 7/4 line.
  • the antenna arrangement according to the invention with the features of the independent claim 1 has the advantage that the reference potential terminal is connected via a first impedance to the reference potential of a reference potential surface and in that the first impedance is high-impedance in the first operating frequency range and low-resistance in the second operating frequency range.
  • the frequency-selective termination of the reference potential terminal ensures that the radiating element or the antenna arrangement is resonant both in the first operating frequency range and in the second operating frequency range and radiates well.
  • An advantage is that a second impedance is provided which transforms an output resistance of an antenna network so that it is in each operating frequency ranges at the respective Input resistance of the antenna assembly is adapted to the feed terminal.
  • an impedance match between the output resistance of the antenna network and the input resistance of the antenna array at the feed terminal regardless of the geometry of the antenna arrangement realize, so that one is not determined in the dimensioning of the geometric dimensions of the antenna assembly and can adapt to spatial conditions or space constraints ,
  • the second impedance is formed as a line whose length corresponds to a quarter of the operating wavelengths of the second operating frequency range, wherein the second operating frequency range comprises frequencies which are about half the frequencies of the first operating frequency range. In this way, the second impedance can be realized particularly simple and little effort.
  • the first impedance may be formed as a line whose length is selected so that the impedance of the line in the second operating frequency range is low and in the first operating frequency range high impedance, wherein the second operating frequency range includes frequencies that are about half as large as the frequencies of the first operating frequency range ,
  • the length of the line corresponds to approximately one fourth of the operating wavelengths of the second operating frequency range and the line idles.
  • the line for the second operating frequency range forms a short circuit and for the first operating frequency range, an open circuit between the reference potential terminal and the reference potential.
  • the same advantage is achieved by using a resonant circuit for the first impedance whose resonance frequency lies approximately in the second operating frequency range and thus represents a particularly low impedance in the second operating frequency range, and which is high impedance for frequencies of the first operating frequency range.
  • the first impedance as a semiconductor device, preferably as a PIN diode is formed. 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 terminal and the reference potential terminal of the antenna assembly and the distance between the feed terminal and the reference potential terminal are selected so that the input resistance of the antenna array at the feed terminal for both operating frequency ranges is approximately equal.
  • the input resistance of the antenna array can be easily connected by appropriate geometric dimensioning of the antenna array for both operating frequency ranges without impedance transformation to an antenna network for powering and receiving radio signals, so that components, space and cost savings.
  • radiator element is angled. In this way, the antenna arrangement can be downsized and space saved, without the antenna effect is reduced.
  • Another advantage is that the antenna arrangement is embedded in a material whose dielectric constant is significantly greater than 1. In this way, also a reduction of the antenna and thus a space saving can be achieved without the antenna effect is substantially reduced.
  • an antenna arrangement according to the invention in a radio device according to independent claim 7.
  • Such a radio can be in a simple, low-effort, cost and space-saving manner in two different operating frequency ranges operate without the antenna effect is reduced in the two operating frequency ranges.
  • FIG. 1 shows a first embodiment of a radio with an antenna arrangement
  • Figure 2 shows a second embodiment of a radio with an antenna assembly
  • Figure 3 shows a third embodiment of a radio with an antenna assembly
  • Figure 4 is an angled radiating element
  • Figure 5 is a flowchart for a control of the radio
  • 70 denotes a radio device which may be formed, for example, as a mobile or cordless telephone, a handheld radio, a work radio, or the like.
  • the radio 70 comprises a printed circuit board having a reference potential surface 30 with a reference potential 25.
  • the reference potential area 30 can be extended in part or as in FIG. 1 completely over the printed circuit board.
  • the radio 1 further comprises an antenna assembly 1 with a radiating element 5, which comprises a feed terminal 10 and a reference potential terminal 15 each of approximately equal length perpendicular to the radiator element 5.
  • the reference potential terminal 15 is disposed at one end of the radiator element 5, the other end is free.
  • the feed terminal 10 is disposed in the center of the radiator element 5 and the reference potential terminal 15.
  • the feed terminal 10 may also be between the center of the radiator element 5 and the Center of the radiator element 5 and the reference potential terminal 15 is arranged.
  • the feed terminal 10 may also be disposed between the center of the radiator element 5 and the reference potential terminal 15.
  • the antenna arrangement 1 is resonant in a first operating frequency range of, for example, about 1.8-1.9 GHz and in a second operating frequency range of, for example, about 0.9-1.0 GHz, different from the first operating frequency range and optionally via the feed connection 10 Signals in the first operating frequency range or in the second operating frequency range can be fed.
  • the antenna 80 formed from the radiator element 5, the feed terminal 10 and the reference potential terminal 15 is formed F-shaped, wherein the two crossbars serve as a feed terminal 10 and reference potential terminal 15 and the antenna 80 with an antenna network 75 and connect to the reference potential 25, so that results in an upside down F for the geometric shape of the antenna 80.
  • the two crossbars are thus components of the antenna 80.
  • the antenna 80 is therefore referred to as inverted-F antenna and because of their operability in two different operating frequency ranges as a dual-frequency inverted-F antenna (DF-IFA).
  • DF-IFA dual-frequency inverted-F antenna
  • the antenna 80 is arranged above the reference potential area 30, which forms the antenna counterweight.
  • the reference potential terminal 15 is connected via a first line 20 formed as the first impedance to the reference potential 25 of the reference potential surface 30.
  • the length of the first line 20 is selected so that the impedance of the first line 20 in the second operating frequency range is low-resistance and high impedance in the first operating frequency range, the second Operating frequency range includes frequencies that are about half the frequencies of the first operating frequency range.
  • the length of the first line 20 may correspond to about one quarter of the operating wavelengths of the second operating frequency range when idling.
  • the length of the first Line 20 corresponds to about half of the associated operating wavelengths, wherein the frequency associated with a frequency of the reciprocal of the frequency multiplied by the speed of light results.
  • the described frequency-selective termination of the reference potential terminal 15 through 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 emission properties.
  • the first line 20 is formed for example as a strip, microstrip or coaxial line, the inner conductor is connected to the reference potential terminal 15 and the outer conductor to the reference potential 25.
  • the feed terminal 10 is connected via a second impedance 60 formed as a second impedance to an antenna network 75 to which a controller 85 is connected.
  • the controller 85 is also connected to an input unit 90 having an operating element 95.
  • the second line 60 may also be formed as a strip, microstrip or coaxial line, the inner conductor on the one hand to the feed terminal 10 and on the other hand with the antenna network 75 is connected and whose outer conductor is connected to the reference potential 25.
  • the second line 60 transforms an output resistance of the antenna network 75, so that it is adapted in both operating frequency ranges to the respective input resistance of the antenna arrangement 1 at the feed terminal 10.
  • the input resistance of the antenna arrangement 1 at the feed terminal 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 about a quarter of the operating wavelengths of the second operating frequency range.
  • the output resistance of the antenna network 75 is 50 ⁇ and that the input resistance of the antenna assembly 1 at the feed terminal 10 in the second operating frequency range is 30 ⁇
  • an adjustment is made for an amount of the characteristic impedance of the second line 60 in the second operating frequency range of ⁇ 30 * 50 ⁇ the output resistance of the antenna network 75 to the input resistance of the antenna assembly 1 at the feed terminal 10 in the second operating frequency range.
  • the input resistance of the antenna arrangement 1 at the feed terminal 10 is 50 ⁇ .
  • the output resistance of the antenna network 75 is mapped by 50 ⁇ by the second line 60 to itself and is therefore also connected to the input resistance of the antenna arrangement 1 a Infeed terminal 10 adapted in the first operating frequency range.
  • the geometric dimensions of the antenna 80 are to be chosen so that in the first operating frequency range of Input resistance of the antenna assembly 1 at the feed terminal 10 is 50 ⁇ and in the second operating frequency range is 30 ⁇ .
  • the first line 20 is replaced by a resonant circuit 35 whose resonance frequency is approximately in the second operating frequency range, so that it connects the reference potential terminal 15 low resistance to the reference potential 25 in the second operating frequency range.
  • the resonant circuit 35 connects the reference potential terminal 15 high impedance to the reference potential 25.
  • 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 terminal 10 and the reference potential terminal 15 and the distance 55 between the feed terminal 10 and the reference potential terminal 15 are selected so that the input resistance of the antenna assembly 1 at the feed terminal 10 is approximately the same for both operating frequency ranges , This is achieved, for example, that the length 45 of the radiator element 5 is about 80mm, that the height 50 of the feed terminal 10 and the reference potential terminal 15 is about 15mm and that the distance 55 between the feed terminal 10 and the reference potential terminal 15 is about 15mm, so that, for example, both the first operating frequency range with frequencies between 1.8 GHz and 1.9 GHz and the second operating frequency range with frequencies between 0.9 GHz and 1 GHz, the input resistance of the antenna assembly 1 at the feed terminal 10 is 50 ⁇ each.
  • the first operating frequency range between 1.8 GHz and 1.9 GHz is used, for example, in the German E-network for mobile communications and in accordance with the DECT standard (Digital Enhanced Cordless Telecommunications) for cordless telephony.
  • the second operating frequency range between 0.9 GHz and 1 GHz is used, for example, for mobile telephony according to the GSM standard (Global System for Mobile Communications). Since for both operating frequency ranges the input resistance of the antenna arrangement 1 at the feed terminal 10 is approximately equal and as the output resistance of the antenna network 75 is 50 ⁇ , an impedance transformation between the antenna network 75 and the feed terminal 10 is not required.
  • the radio 70 according to the embodiment of Figure 2 is the same structure as the radio 70 according to the embodiment of Figure 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 resonant circuit 35 is replaced by a PIN diode 40 whose anode is connected to the reference potential terminal 15 and whose cathode 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.
  • the PIN diode 40 can also be Another semiconductor device, such as a conventional pn diode or a transistor can be used, which are to be controlled by the controller 85 accordingly.
  • the PIN diode 40 is switched by a low-level control signal from the controller 85 in a blocking state when the radiator element 5 is fed via the supply terminal 10 with signals whose frequency is in the first operating frequency range, so that in the first operating frequency range, a high-impedance connection of the Reference potential terminal 15 is present with the reference potential 25.
  • the PIN diode 40 is switched by a high-level control signal from the controller 85 in a conductive state when the radiator element 5 is fed via the supply terminal 10 with signals whose frequency is in the second operating frequency range, so that in the second operating frequency range of the reference potential terminal 15 low impedance the reference potential 25 is connected.
  • the material 65 with a dielectric constant that is significantly greater than 1 it is achieved that the geometric dimensions of the antenna 80 can be reduced with little reduction of the antenna effect.
  • a further reduction of the antenna 80 results from bending of 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 length 45b of the angled part 205 of the radiator element 5 and The bend 45a of the non-angled portion 200 of the radiator element 5.
  • the bend is formed approximately at right angles, wherein the angled portion 205 may point in any direction.
  • a particularly advantageous embodiment is obtained by bending downwards, wherein the angled portion 205 is arranged approximately parallel to the feed terminal 10 and the reference potential terminal 15 in the direction of the radio 70 towards.
  • the bend can also be provided perpendicular to the feed terminal 10 and the reference potential terminal 15, wherein the angled portion 205 and the non-angled portion 200 are approximately in a plane, as shown in Figure 4.
  • FIG 5 shows a flow chart for the operation of the controller 85 of the radio device 70.
  • the controller 85 checks whether received signals were transmitted to the antenna network 75 via the antenna 80, which also acts as a receiving antenna, and the feed connection 10, whose frequency is in the first operating frequency range lies. If this is the case, the program branches to a program point 105, otherwise a branch is made 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 feeding via the feed terminal 10.
  • the PIN diode 40 is controlled by the controller 85 driven low level, so that the reference potential terminal 15 is connected to the reference potential 25 high impedance.
  • a branch is made to a program point 110.
  • the controller 85 checks whether the existing radio connection has been terminated, for example via the input unit 90 by a user. If this is the case, then the program part is left, otherwise a branch is made to a program point 115. at Program point 115 will go through a waiting loop. Subsequently, branching back to program point 110.
  • the controller 85 checks whether the user desires to establish a connection in the first operating frequency range by corresponding actuation of the operating element 95. If this is the case, the program branches to program point 105, otherwise a branch is made to a program point 125.
  • the controller 85 checks whether a radio signal whose frequency is in the second operating frequency range has been received via the antenna 80 in the antenna network 75. If this is the case, a branch is made to a program point 130, otherwise a branch is made to a program point 135.
  • the controller 85 causes the antenna network 75 to use a frequency in the second operating frequency range for the transmission of signals via the antenna 80.
  • the controller 85 in this case according to the embodiment of Figure 3 controls the PIN diode 40 with a high level control signal on, so that the PIN diode 40 is switched to the conducting state and the reference potential terminal 15 low impedance connects to the reference potential 25. Subsequently, a branch is made to program point 110.
  • the controller 85 checks whether the user desires to establish a connection in the second operating frequency range by corresponding actuation of the operating element 95. If this is the case, the program branches to program point 130, otherwise the program part is left.
  • the antenna 80 is suitable for operation in two different operating frequency ranges. Due to the small height of the antenna 80, the antenna 80 can be integrated, for example, in 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.

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

Claims (7)

  1. Dispositif d'antenne (1) comportant un élément rayonnant (5) comprenant un raccord d'alimentation (10) et un raccord de potentiel de référence (15), l'élément rayonnant (5) résonnant dans une première plage de fréquences de service et dans une deuxième plage de fréquences de service différente de la première, et pouvant être alimenté en signaux par l'intermédiaire de la prise d'alimentation (10) au choix dans la première plage de fréquences de service ou dans la deuxième plage de fréquences de service, la deuxième plage de fréquences de service comprenant des fréquences qui sont à peu près deux fois moins importantes que les fréquences de la première plage de fréquences de service, dans lequel le raccord de potentiel de référence (15) est relié au potentiel de référence (25) d'une surface de potentiel de référence (30) par l'intermédiaire d'une première impédance (20, 35, 40) cette première impédance (20, 35, 40) étant à haute impédance dans la première plage de fréquences de service et à basse impédance dans la deuxième plage de fréquences de service, la première impédance étant constituée d'un composant semi-conducteur (40), et dans lequel une deuxième impédance (60) est prévue pour transformer une résistance de sortie d'un réseau d'antenne (75) de manière à l'adapter dans les deux plages de fréquence de service, à la résistance d'entrée respective du dispositif d'antenne (1) sur le raccord d'alimentation (10), la deuxième impédance (60) étant en forme de câble dont la longueur correspond approximativement au quart des longueurs d'ondes de service de la deuxième plage de fréquences de service.
  2. Dispositif d'antenne (1) selon la revendication 1,
    caractérisé en ce que
    le composant semi-conducteur (40) est une diode PIN.
  3. Dispositif d'antenne (1) selon la revendication 2,
    caractérisé en ce que
    le composant semi-conducteur (40) est commuté dans un état de blocage lorsque l'élément rayonnant (5) est alimenté en signaux dont la fréquence se situe dans la première plage de fréquences de service,
    et le composant semi-conducteur (40) est commuté dans un état conducteur lorsque l'élément rayonnant (5) est alimenté en signaux dont la fréquence se situe dans la deuxième plage de fréquences de service.
  4. Dispositif d'antenne (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'élément rayonnant (5) est recourbé.
  5. Dispositif d'antenne (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'
    il est noyé dans une matière (65) dont la constante diélectrique est nettement supérieure à un.
  6. Dispositif d'antenne (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'élément rayonnant (5), le raccord d'alimentation (10) et le raccord de potentiel de référence (15) forment une antenne en forme de F inversé.
  7. Appareil radio (70), en particulier téléphone mobile ou sans fil, comportant un dispositif d'antenne (1) selon l'une quelconque des revendications précédentes.
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 EP1086509A1 (fr) 2001-03-28
EP1086509B1 true EP1086509B1 (fr) 2007-07-18

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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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Publication number Publication date
DE19822371B4 (de) 2018-03-08
JP4112178B2 (ja) 2008-07-02
EP1086509A1 (fr) 2001-03-28
JP2002516505A (ja) 2002-06-04
DE59914417D1 (de) 2007-08-30
US6518922B1 (en) 2003-02-11
DE19822371A1 (de) 1999-11-25
WO1999060662A1 (fr) 1999-11-25

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