EP1518332A1 - Circuit pour un telephone mobile - Google Patents

Circuit pour un telephone mobile

Info

Publication number
EP1518332A1
EP1518332A1 EP03761440A EP03761440A EP1518332A1 EP 1518332 A1 EP1518332 A1 EP 1518332A1 EP 03761440 A EP03761440 A EP 03761440A EP 03761440 A EP03761440 A EP 03761440A EP 1518332 A1 EP1518332 A1 EP 1518332A1
Authority
EP
European Patent Office
Prior art keywords
circuit arrangement
signal line
antenna
band
arrangement according
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Withdrawn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
EP03761440A
Other languages
German (de)
English (en)
Inventor
Christian Block
Torsten Keiler
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.)
TDK Electronics AG
Original Assignee
Epcos AG
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 Epcos AG filed Critical Epcos AG
Publication of EP1518332A1 publication Critical patent/EP1518332A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0483—Transmitters with multiple parallel paths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
    • H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes

Definitions

  • the invention relates to a circuit arrangement for a mobile phone with an antenna, an antenna line and with signal lines.
  • the circuit arrangement also contains bandpass filters and amplifiers.
  • the frequency range used in the transmission branch forms the so-called full band.
  • a full band can range, for example, from 1.85 to 1.91 GHz.
  • the full band is divided into two half bands, the lower half band from 1.85 to 1.88 and the upper half band from 1.88 to 1.91 GHz.
  • two signal lines are provided in the transmission branch. Signals processed in the two signal lines, for example by SAW filters, pass through a switch which switches between the two signal lines to an amplifier common to the two signal lines. From there they are fed to a bandpass filter, which separates the amplifier from an antenna connected to the bandpass filter outside the frequency band used for transmission with a certain blocking attenuation.
  • the known circuit arrangement has the disadvantage that both half-bands of the transmission branch run to the antenna via the same band-pass filter.
  • bandpass filters typically used have an attenuation curve that is not optimal over the entire full band. Rather, the characteristic in the upper area of the full band gradually passes into the flank, which leads to an increase in insertion loss of up to 3.5 dB at the upper edge of the full band. Accordingly, there is the disadvantage that the high attenuation at the edge of the full band must be compensated for by a correspondingly more powerful amplifier. With such an amplifier comes in this is accompanied by increased power consumption, which disadvantageously reduces the operating times of the cell phones which are usually operated with rechargeable batteries.
  • a circuit arrangement for a mobile phone which has a transmission branch.
  • a first signal line for a first frequency band and at least one further signal line for at least one further frequency band are provided in the transmission branch.
  • An antenna line is also provided which is connected to an antenna.
  • the antenna is connected to a switch for contacting the antenna with either one of the signal lines.
  • An amplifier is connected in series with each signal line.
  • a bandpass filter for the corresponding frequency band is connected between each amplifier and the switch.
  • the circuit arrangement has the advantage that there is a separate bandpass filter for each signal line, which can be optimized with regard to the attenuation on this band, which means that very little losses occur in the bandpass filter.
  • This is preferably made possible by the corresponding receiving band being correspondingly further away on the frequency axis.
  • the amplifier can be designed to be relatively weak, which reduces the power consumption of the amplifier and at the same time advantageously increases the operating time of the mobile telephone.
  • a reception branch is also provided which contains a further signal line for a further frequency band.
  • a bandpass filter for the further frequency band is connected in series with the signal line.
  • Circuitry can be connected to the antenna line via a circulator.
  • the bandpass filters of the circuit arrangement are designed as ceramic filters.
  • Such ceramic filters are implemented, for example, as ceramic bodies which have through-bores.
  • the filter function is achieved by coupled, short-circuited lines shielded by an external metallization.
  • the bandpass filters can also be formed in the form of SAW filters.
  • the ceramic filters are connected to a common sheet metal, the sheet metal being located above the ceramic filter.
  • the common plate can also serve as a common ground connection.
  • a passive component for matching the impedances is connected in each signal line between the switch and the bandpass filters.
  • Such passive components can, for example, ⁇ filters or e.g. be a lead.
  • Such passive components for impedance matching can further reduce the losses in the circuit arrangement.
  • a passive component for impedance matching is connected between the isolator and the bandpass filter in the receiving branch.
  • the isolator and the passive components are in one Multi-layer substrate are integrated.
  • the switch can also be mounted on the upper side of the multilayer substrate.
  • LTCC modules can be manufactured in a space-saving manner and contain a large number of different passive components and active components.
  • the amplifiers of the circuit arrangement have a gain Pout / ⁇ in which is less than 26 dB.
  • the bandpass filters are specially adapted to the corresponding frequency range. This can be achieved, for example, by using the filter curve of a bandpass filter, which is suitable in principle for filtering the full band, but which already has a high attenuation at the high-frequency end of the full band, as the basis for the bandpass filter in the circuit arrangement.
  • the bandpass filter for the full band can be used for the lower half band.
  • Figure 1 shows a circuit arrangement in a schematic representation.
  • FIG. 2 shows attenuation curves of bandpass filters as can be used in the circuit arrangement from FIG. 1.
  • Figure 1 shows a circuit arrangement for a mobile phone.
  • a transmission branch 11 and a reception branch 12 are provided.
  • the receiving branch 12 leads to a low-noise amplifier.
  • the transmission branch 11 is connected (not shown in FIG. 1) to a chipset that modulates the useful signals and mixes them up in the respective frequency range of the transmission branch.
  • the transmission branch 11 comprises two signal lines 21, 22, while the reception branch 12 comprises only one signal line 23.
  • the signals coming from a chipset and running in the signal lines 21, 22 are processed in surface wave filters 201, 202. You then come to an amplifier 61, 62, which amplify the voice signals so that they are suitable for sending the signals.
  • bandpass filters 71, 72 are provided, which are each adapted separately for a signal line 21, 22.
  • the insertion loss of the bandpass filter 71, 72 can be advantageously reduced, so that the amplifier 61, 62 can be designed for a smaller output. This reduces both the energy consumption of the circuit arrangement and the space requirement.
  • Amplifiers 61, 62 that are designed for smaller powers take up less space than an amplifier that is designed for large powers.
  • the transmission branch 11 is further connected to an LTCC module 100, that is to say one Multi-layer substrate, on the top of which, for example, a switch 5 is integrated.
  • a switch 5 which optionally connects the antenna line 3 connected to the antenna 4 to the signal line 21 or the signal line 22.
  • passive components 91, 92 which are integrated in the module 100, are provided. These passive components 91, 92 can be, for example, ⁇ filters or a line.
  • the switch 5 can be a GaAs field effect transistor, for example. However, it can also consist of PIN diodes.
  • an insulator 8 can also be provided, which can be integrated into the module 100 by using ferrite materials.
  • the isolator 8 has the task of separating the transmitting branch 11 from the receiving branch 12.
  • a bandpass filter 73 which is connected to the isolator 8 via a passive component 93, is in turn connected in the signal line 23 of the receiving branch 12.
  • the position of the insulator is variable and is not limited to the illustration in FIG. 1.
  • the insulator can also be arranged outside the multilayer module 100.
  • a diplexer into the multilayer module 100, which - seen from the antenna - causes a splitting into the frequency range of the transmission branch and into a lower frequency range.
  • the antenna line is a connection to the diplexer within the multilayer module.
  • the frequency band used in the transmission branch 11, which is also referred to as a full band, can range, for example, from 1.85 to 1.91 GHz.
  • This full band is divided into two Half bands.
  • the first half band is the frequency range fBL, which is shown in FIG. 2 and which ranges from 1.85 GHz to 1.88 GHz.
  • fBL frequency range
  • fB1 which is linked to the signal line 21
  • a bandpass filter can be used which has the filter curve marked with Kl in FIG.
  • the filter curve Kl is characterized by a very low attenuation in the frequency range fBl. If the filter marked in FIG.
  • the filter curve K 1 were used for bandpass filtering in the full band, one would already have a considerable one for the second half band, which encompasses the frequency range fB2, which according to FIG. 2 ranges from 1.88 to 1.91 GHz Attenuation of about 3.5 dB on the right band edge at 1.91 GHz. It is accordingly advantageous, according to FIG. 2, to provide the filter 72 with the filter curve K2, which is shifted to the right by 0.03 GHz on the frequency axis relative to the filter curve K 1.
  • FIG. 2 shows filter curves, the gain D of the filter, measured in dB, being plotted against the frequency, measured in GHz.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

Circuit pour un téléphone mobile, qui comporte une branche émettrice (11) comprenant une première ligne de signaux (21) pour une première bande de fréquence (fB1) et au moins une autre ligne de signaux (22) pour au moins une autre bande de fréquence (fB2). Une antenne (4) est connectée à un commutateur (5) pour la mise en contact sélective de ladite antenne (4) avec l'une des lignes de signaux (21, 22). Un amplificateur (61, 62) est connecté en série sur chaque ligne de signaux (21, 22) et un filtre passe-bande (71, 72) pour la plage de fréquence concernée (fB1, fB2) est connecté en série sur chaque ligne de signaux (21, 22) entre chaque amplificateur (61, 62) et le commutateur (5). La division de la bande totale en deux demi-bandes, un filtre passe-bande étant assigné à chaque demi-bande, permet d'obtenir un duplexeur à bande divisée à faible perte d'insertion.
EP03761440A 2002-06-28 2003-06-27 Circuit pour un telephone mobile Withdrawn EP1518332A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10229153 2002-06-28
DE10229153A DE10229153A1 (de) 2002-06-28 2002-06-28 Schaltungsanordnung für ein Mobiltelefon
PCT/DE2003/002149 WO2004004149A1 (fr) 2002-06-28 2003-06-27 Circuit pour un telephone mobile

Publications (1)

Publication Number Publication Date
EP1518332A1 true EP1518332A1 (fr) 2005-03-30

Family

ID=29795978

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03761440A Withdrawn EP1518332A1 (fr) 2002-06-28 2003-06-27 Circuit pour un telephone mobile

Country Status (5)

Country Link
US (1) US20060116088A1 (fr)
EP (1) EP1518332A1 (fr)
JP (1) JP2005531951A (fr)
DE (1) DE10229153A1 (fr)
WO (1) WO2004004149A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8000274B2 (en) * 2005-04-05 2011-08-16 Samsung Electronics Co., Ltd. Versatile system for transceiver noise reduction in a time-division duplexing wireless network
JP2008011503A (ja) * 2006-05-31 2008-01-17 Matsushita Electric Ind Co Ltd 高周波スイッチ回路、高周波スイッチ装置、及び送信モジュール装置
WO2008103083A1 (fr) * 2007-02-19 2008-08-28 Telefonaktiebolaget Lm Ericsson (Publ) Appareil et procédé pour diriger un signal reçu dans un système d'antenne
CN101555620A (zh) * 2008-04-07 2009-10-14 Axt公司 晶体生长装置及方法
US8107918B2 (en) 2008-04-11 2012-01-31 Zoran Corporation Broadband tuner for very wide signal conversion
JP5170139B2 (ja) 2010-03-23 2013-03-27 株式会社村田製作所 回路モジュール
WO2015053045A1 (fr) * 2013-10-10 2015-04-16 株式会社村田製作所 Circuit frontal à haute fréquence
JP6088025B1 (ja) * 2015-11-11 2017-03-01 ソフトバンク株式会社 通信装置
US10377444B2 (en) * 2017-07-31 2019-08-13 Shimano Inc. Bicycle electric component
WO2022138001A1 (fr) * 2020-12-21 2022-06-30 株式会社村田製作所 Circuit haute fréquence, module haute fréquence et dispositif de communication

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2744212C2 (de) * 1977-09-30 1979-11-08 Siemens Ag, 1000 Berlin Und 8000 Muenchen Duplex-Sende-Empfangseinrichtung
US4980660A (en) * 1986-10-06 1990-12-25 Matsushita Electric Industrial Co., Ltd. Antenna sharing apparatus for switchable transmit/receive filters
FI102121B (fi) * 1995-04-07 1998-10-15 Filtronic Lk Oy Radiotietoliikenteen lähetin/vastaanotin
FI100286B (fi) * 1996-04-01 1997-10-31 Nokia Mobile Phones Ltd Lähetin/vastaanotin RF-signaalin lähettämiseksi ja vastaanottamiseksi kahdella taajuusalueella
US5915212A (en) * 1996-08-29 1999-06-22 Ericsson Inc. System and method for achieving extended radio coverage and additional capacity using extended frequency bands
JP3255054B2 (ja) * 1996-12-10 2002-02-12 富士通株式会社 デジタル携帯電話機
EP0947054B1 (fr) * 1996-12-23 2005-06-08 Telefonaktiebolaget LM Ericsson (publ) Radiotelephone avec antenne separee pour mode veille
DE19704151C1 (de) * 1997-02-04 1998-08-27 Siemens Ag Sende-Empfangs-Umschalteanordnung
US6091939A (en) * 1997-02-18 2000-07-18 Ericsson Inc. Mobile radio transmitter with normal and talk-around frequency bands
US5815804A (en) * 1997-04-17 1998-09-29 Motorola Dual-band filter network
US6216012B1 (en) * 1997-11-07 2001-04-10 Conexant Systems, Inc. Dualband power amplifier control using a single power amplifier controller
US6397077B1 (en) * 1998-05-20 2002-05-28 Conexant Systems, Inc. Wide frequency range couplers and detectors for power detection in multiple frequency band systems
US6304748B1 (en) * 1998-09-23 2001-10-16 Conexant Systems, Inc. Transmitter circuitry for a cellular phone
FR2783654B1 (fr) * 1998-09-23 2006-07-28 Sagem Emetteur-recepteur bibande a double dispositif de rayonnement
WO2000046931A1 (fr) * 1999-02-03 2000-08-10 Siemens Aktiengesellschaft Element coupleur d'antenne integre
US6795690B2 (en) * 1999-10-12 2004-09-21 Qualcomm, Incorporated Full-duplex transceiver with distributed duplexing function
DE19960299A1 (de) * 1999-12-14 2001-06-21 Epcos Ag Duplexer mit verbesserter Sende-/Empfangsbandtrennung
US6643522B1 (en) * 2000-03-27 2003-11-04 Sharp Laboratories Of America, Inc. Method and apparatus providing simultaneous dual mode operations for radios in the shared spectrum
JP3874241B2 (ja) * 2001-07-27 2007-01-31 株式会社ルネサステクノロジ 電子部品および設計方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004004149A1 *

Also Published As

Publication number Publication date
WO2004004149A1 (fr) 2004-01-08
JP2005531951A (ja) 2005-10-20
US20060116088A1 (en) 2006-06-01
DE10229153A1 (de) 2004-02-05

Similar Documents

Publication Publication Date Title
DE102010046677B4 (de) Schaltungsanordnung
DE69817941T2 (de) Hochfrequenzschaltungsanordnung, Eingabeeinheit und Transceiver
EP1114523B1 (fr) Commutateur d'antenne multibande
DE10150159B4 (de) Impedanzanpassungsschaltung für einen Mehrband-Leisungsverstärker
DE102011012927B4 (de) Verstärkermodul
DE10158791B4 (de) Hochfrequenzverstärker und Funkübertragungsvorrichtung
DE102008050743A1 (de) Impedanzanpass-Schaltung zur Anpassung von Planarantennen
DE19719467C2 (de) OFW-Duplexer
DE69308920T2 (de) Dielektrisches Filter, das auf einem Substrat aufgebracht ist, auf dem Eingangs- und Ausgangsstreifenleitungen angeordnet sind.
DE10321247A1 (de) Verlustarmes Sendemodul
EP1518332A1 (fr) Circuit pour un telephone mobile
DE69523041T2 (de) Streifenleitungsfilter, empfänger mit einem streifenleitungsfilter und verfahren zur abstimmung eines derartigen filters
DE202020106896U1 (de) Hochfrequenzmodul und Kommunikationsgerät
DE69931729T2 (de) Funkgerät mit einem dielektrischen Filter
DE4025466A1 (de) Radiofrequenz-sende- und empfangsschaltung fuer ein mobiles telekommunikationssystem
EP2537251B1 (fr) Filtre passe-bande commutable
DE202021101986U1 (de) Hochfrequenzmodul und Kommunikationsgerät
DE112018000598T5 (de) Trap-filter und filterschaltung
WO2000046934A1 (fr) Unite emettrice/receptrice pour une premiere et une seconde frequence d'emission/de reception
WO2004070965A1 (fr) Circuit frontal comportant des resonateurs en couche mince
DE2952793C2 (de) Abstimmbare Empfängereingangsschaltung
DE102009038148B4 (de) Triplexer für ein Multiband-Antennenmodul eines Fahrzeugs
DE68910719T2 (de) Mikrowellensperrfilter in Mikrostreifenausführung.
EP1290805B1 (fr) Appareil de radiotelephonie mobile multibande et circuit d'antennes y relatif
DE3109651C2 (de) Kanalsperrfilter

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20041103

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

RBV Designated contracting states (corrected)

Designated state(s): DE FI FR GB

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20091231