EP1505682A1 - HF-Schaltungsanordnung für mobile Kommunikationsendgeräte - Google Patents
HF-Schaltungsanordnung für mobile Kommunikationsendgeräte Download PDFInfo
- Publication number
- EP1505682A1 EP1505682A1 EP04018540A EP04018540A EP1505682A1 EP 1505682 A1 EP1505682 A1 EP 1505682A1 EP 04018540 A EP04018540 A EP 04018540A EP 04018540 A EP04018540 A EP 04018540A EP 1505682 A1 EP1505682 A1 EP 1505682A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter
- arrangement
- reception
- tunable
- transmission
- 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- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/10—Auxiliary devices for switching or interrupting
- H01P1/15—Auxiliary devices for switching or interrupting by semiconductor devices
Definitions
- the invention relates to an RF circuit arrangement for mobile communication terminals with a reception path, a reception antenna arrangement, a reception filter arrangement, an external to an RF chip low-noise amplifier, one opposite the RF chip internal low-noise amplifier and one between the internal and the external low-noise amplifier receiving intermediate filter arrangement and a transmission path, the a transmitting antenna arrangement, a transmitting filter arrangement, a power amplifier external to the RF chip, an opposite to the RF chip internal preamplifier and a between the preamplifier and the power amplifier comprising transmitting intermediate filter arrangement.
- Communication terminals are for both the receiving and also for the transmission path as so-called RF intermediate filter fixed interstage filters or one filter bank each intended.
- the transmission path is the fixed Interstage filter adapted such that of the RF chip coming, unwanted noise of a transmission signal yet be suppressed in front of the power amplifier.
- the said Noise is mainly due to the IQ modulator of the HF chips.
- the interstage filter associated with the receive path ensures a required blocker suppression and is between the external low-noise amplifier and the RF chip arranged.
- the low noise amplifier compared to the RF chip therefore already receives one for further signal processing processed received signal.
- the two above-mentioned interstage filters, which are used as RF intermediate filters are usually through expensive and space-consuming SAW filters realized (SAW: "Surface Acoustic Wave ").
- the invention is based on the object, an RF circuitry for mobile Provide communication terminals that are suitable for a Use with different mobile radio frequency bands is simplified.
- HF filter is for example from US 2002/0093400 A1 known and provides that electrical varactors through Apply appropriate control voltages customizable Provide passband of a realized RF filter.
- This tunable HF intermediate filter may be preferred Interstage filter of the type described above.
- This RF intermediate filter can, for example, in the receive path of the be arranged mobile communication terminal. His Tunability makes it possible to use the RF circuitry in terms of their reception path to different Adjust carrier frequencies of different mobile radio standards. If the HF intermediate filter in the transmission path of the mobile Communication terminal is arranged, it may be due his tunability to those for each Frequency bands on which broadcast is pertinent Noise requirements are adjusted.
- this is at least one tunable RF intermediate filter both as the receive intermediate filter arrangement as well as the transmit intermediate filter arrangement intended. Because in half-duplex operation the mobile communication terminal either sends or can be achieved by suitable control of the tunable RF inter-filter each an optimal operating condition both for sending as well as for receiving operation to be provided. Especially for half-duplex operation is the RF intermediate filter between a transmit mode and a Reception mode switchable. The switchability of the HF intermediate filter But it can also be an advantage if the RF circuitry in a mobile multimode communication terminal is used. In this case can the tunable RF intermediate filter to multiple receiving or Transmission frequency ranges are adjusted.
- a switch is provided to the at least one tunable RF intermediate filter in the Send path or receive path to integrate.
- the two provided switch for example, from a Control device running on a baseband chip of the mobile Communication terminal can be realized, controlled.
- the receiving filter arrangement and the transmit filter arrangement in each case by a bandpass filter be formed.
- the RF intermediate filter arrangements complement each other the transmit and receive paths and the provided bandpass filters to those already explained respective functions in the send or receive path to ensure the filter elements.
- the be tuned RF intermediate filter narrowband as the respectively provided front-end filter, which the Receive filter arrangement and the transmission filter arrangement form. In this way it is possible for the front-end filters several transmit and several receive bands different mobile standards, while the used selectable HF intermediate filters the selection of a grade relevant transmit / receive band.
- the receive filter arrangement and the transmit filter arrangement can use a common switch with a Antenna arrangement may be connected, which is both the receiving antenna array as well as the transmit antenna arrangement forms. This means that not necessarily for the Transmit and the receive path separate antenna structures to be provided. Rather, one may also apply several mobile standards customizable common Antenna arrangement are chosen, which then both for the Send as well as for the receive path is usable.
- the receive filter arrangement and the transmit filter arrangement can from a common FE filter (FE: "Front End”) be formed, which has a switch with the external low-noise amplifier of the receive path and the external Power amplifier of the transmission path is connectable.
- FE Front End
- This tunable FE filter provides an alternative solution for the both previously discussed bandpass filter.
- the at least one Tunable HF intermediate filter in the transmission path between the Preamp and the power amplifier and a second tunable HF intermediate filter between the external low noise amplifier and the internal low noise Amplifier is provided in the receive path, the Receive filter arrangement and the transmission filter arrangement of a duplexer are formed.
- the duplexer is in this A typical component for full-duplex operation a mobile communication terminal. Because both in the Send as well as in the receive path a tunable HF intermediate filter can, by appropriate control of Passage ranges of these RF intermediate filter between each switched multiple transmit or multiple receive bands become. It is particularly favorable in this context that also the duplexer with regard to its transmission characteristics be tunable for the send and the receive path itself can.
- a common Antenna arrangement for the transmit and the receive path be provided, in which case the duplexer with a Antenna arrangement is connected, which is both the receiving antenna array as well as the transmit antenna arrangement forms.
- the antenna arrangement will then be chosen such that they support a plurality of desired ones Mobile standards is suitable, in particular in terms of their reception and transmission properties leaves.
- HF intermediate filter arrangements both of which are formed by a tunable RF intermediate filter being realized outside the RF chip, wherein ceramic constructions for the implementation of the HF intermediate filter are preferred.
- LTCC Low temperature co-fired ceramic
- the tunable HF intermediate filters provided switches and low-noise amplifier in question.
- an actual front-end circuit in particular the receive filter arrangement and the transmit filter arrangement belong, together with the previously mentioned components in a LTCC process.
- This method Among other things, it also allows integration miniaturized surface wave filter, also called SAW.
- Half duplex GSM, EDGE; Full duplex: UMTS-FDD, CDMA2000, IS136.
- the presented RF circuitry creates the possibility of being tuned Building multi-standard frontends.
- the Conventionally provided SAW filter banks for example replaced by a tunable Fronend filter.
- Any / tunable HF intermediate filters ensure transmission and Receive-side signal requirements by a tunable front-end filter alone can not be achieved can.
- the RF circuit arrangement thus enables a Implementation of an SDR-HF frontend (SDR: "Software defined region ").
- broadband reception and transmission lines be realized by the RF circuitry.
- the Receive filter arrangement and / or the transmission filter arrangement are designed to be tunable.
- the receive filter arrangement and the transmit filter arrangement depending on the application (mobile radio standard) as Bandpass, low pass or high pass filter may be formed.
- a first embodiment of an RF circuit arrangement for a mobile communication terminal is based on the figures 1 and 2 illustrated.
- the RF circuitry has an antenna arrangement 1, which a transmission path and a Receive path of the RF circuitry is common.
- the Antenna arrangement 1 can be via a switch 2 either with a reception filter 3 or a transmission filter 4 connect.
- the reception filter 3 and the transmission filter 4 are each executed as a fixed bandpass filter. It is it can be seen that the RF circuitry for a Half-duplex operation of the mobile communication terminal is designed, because with the help of the switch 2 can be the Antenna arrangement 1 either with the transmitting or Connect the reception path.
- the HF circuit arrangement has a circuit part, which is common to the transmit and receive paths and themselves from a tunable interstage filter 7 as RF intermediate filter and two each on one side of the Interstage filters arranged switches 8, 9 composed.
- the switch 8 is arranged to be the tunable one Interstage filter 7 either with an output of the external low-noise amplifier 5 or with the input of the external Power amplifier 6 can connect, pending of whether the RF circuitry is currently in the transmit or Reception mode is.
- the switch 9 connects the interstage filter 7 either with an input of another low noise amplifier 10 associated with the receive path and internally on an RF chip 11 of the RF circuitry is realized.
- An output signal of the internal low-noise Amplifier 10 is fed to a receiving mixer 12, the down-converts a received signal to a frequency that has a further processing of the received signal in the baseband allows.
- the switch 9 connects the interstage filter 7 with a Output of a preamplifier 13, which on the RF chip 11th is integrated.
- a transmit input signal for the preamplifier 13 is provided by a transmit mixer 14, which is a provided by baseband signal processing Transmission signal for transmission via the antenna arrangement 1 processed, in particular the carrier frequency to be used sets.
- FIG. 1 shows the position of the respective switches 2, 8, 9 for a receiving operation, while the figure 2 the Position of the same switches 2, 8, 9 for a transmission operation illustrated.
- the tunability of the interstage filter 7 allows for a transmit operation and a Reception operation of the RF circuitry respectively provide additional filter properties. That as Bandpass filter implemented tunable interstage filter 7 ensures noise reduction in transmission mode Transmission signal, the associated interference in the first place come from the transmitter-mixer 14. In contrast, that creates tunable interstage filters designed as bandpass filters 7 in the receive mode the required Blocker suppression.
- Control device For switching between transmit mode and receive mode at Support for a half-duplex cellular standard is one not shown here to use control device, the for example, on a baseband chip of the mobile Communication terminal can be realized.
- These Control device actuated during a changeover, for example, from a transmitting to a receiving operation, at the same time the switches 2, 8 and 9, while additionally a Passband of the tunable interstage filter 7 of the transmission band of the half-duplex mobile radio standard to the Receiving band is changed.
- FIG. 3 shows an alternative embodiment of FIG Figures 1 and 2 explained RF circuitry.
- the tunable Filter 15 can be with the help of the switch 2 either with an input of the external low-noise amplifier 5 or with connect to the output of the external power amplifier 6.
- the unspecified explained part of the RF circuit arrangement of Figure 3 is structurally correct with the corresponding part the RF circuit arrangement according to Figures 1 and 2.
- the HF circuit arrangement according to FIG. 3 is also suitable for a Half-duplex operation provided, with a switch between a transmission mode and a reception mode simultaneous control of the switches 2, 8 and 9 and the Passage ranges of tunable filters 15 and 7 requires.
- the tunable filter 15, which also serves as a front-end filter can be designated, thus fulfilling those Filtering tasks, which in the RF circuitry according to the Figures 1 and 2 of the separate filters 3 and 4 have been taken over.
- transmit signals arrive from the RF chip 21 from, more specifically, a preamplifier 22, to a tunable interstage filters running as bandpass filters 23, after which they have a power amplifier 24 and the Pass through duplexer 17 and finally over the Antenna assembly 16 are emitted.
- the RF circuitry shows as in the previously explained Embodiments also a transmit mixer 25 and a Receive mixer 26 on.
- the function of the two interstage filters 19, 23 corresponds to that of the Half duplex operation explained filter 7.
- the HF circuit arrangement which is based on FIG. 5 is different from that of Figure 4 in that the duplexer 17 is tunable by a Duplexer 27 is replaced.
- the tunability of the duplexer 27 allows the RF circuitry to have a plurality of full-duplex cellular standards that may vary by respective transmit and receive bands from each other differ.
- By appropriate control of Passage areas of the tunable duplexer 27 and the Interstage filters 19, 23 can do the required Adjustments are made.
- the transmit front-end filter namely the transmit filter arrangement, serves (4) primarily for the suppression of Harmonics of the transmit signal while the receive front-end filter, namely the receiving filter assembly (3), from their Function primarily from a current reception band remote interference suppressed.
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Abstract
Description
- Figur 1
- eine HF-Schaltungsanordnung für ein mobiles Kommunikationsendgerät in einem Halbduplex-Empfangsbetrieb,
- Figur 2
- die Schaltungsanordnung von Figur 1 für einen Sendebetrieb des mobilen Kommunikationsendgerätes,
- Figur 3
- eine alternative HF-Schaltungsanordnung für einen Halbduplex-Betrieb eines mobilen Kommunikationsendgerätes,
- Figur 4
- eine Schaltungsanordnung für einen Vollduplex-Betrieb eines mobilen Kommunikationsendgerätes und
- Figur 5
- eine zu der Schaltungsanordnung von Figur 4 alternative Schaltungsanordnung für einen Vollduplex-Betrieb eines mobilen Kommunikationsendgerätes.
Claims (11)
- HF-Schaltungsanordnung für mobile Kommunikationsendgeräte mit einem Empfangspfad, der eine Empfangs-Antennenanordnung, eine Empfangs-Filteranordnung (3), einen gegenüber einem HF-Chip (11) externen rauscharmen Verstärker (5), einen gegenüber dem HF-Chip internen rauscharmen Verstärker (10) und eine zwischen dem internen (10) und dem externen Verstärker (5) gelegene Empfangs-Zwischenfilteranordnung aufweist, und einem Sendepfad, der eine Sende-Antennenanordnung, eine Sende-Filteranordnung (4), einen gegenüber dem HF-Chip (11) externen Leistungsverstärker (6), einen gegenüber dem HF-Chip (11) internen Vorverstärker (13) und eine zwischen dem Vorverstärker (13) und dem Leistungsverstärker (6) gelegene Sende-Zwischenfilteranordnung aufweist,
dadurch gekennzeichnet, dass wenigstens eine von der Empfangs-Zwischenfilteranordnung und der Sende-Zwischenfilteranordnung von einem abstimmbaren HF-Zwischenfilter (7) gebildet wird. - HF-Schaltungsanordnung nach Anspruch 1,
dadurch gekennzeichnet, dass das wenigstens eine abstimmbare HF-Zwischenfilter (7) sowohl die Empfangs-Zwischenfilteranordnung als auch die Sende-Zwischenfilteranordnung bildet. - HF-Schaltungsanordnung nach Anspruch 2,
dadurch gekennzeichnet, dass das wenigstens eine HF-Zwischenfilter (7) zwischen einem Sendemodus und einem Empfangsmodus umschaltbar ist. - HF-Schaltungsanordnung nach einem der Ansprüche 2 oder 3,
dadurch gekennzeichnet, dass zu beiden Seiten des wenigstens einen abstimmbaren HF-Zwischenfilters (7) jeweils ein Schalter (8, 9) vorgesehen ist, um das wenigstens eine abstimmbare HF-Zwischenfilter (7) in den Sendepfad oder den Empfangspfad zu integrieren. - HF-Schaltungsanordnung nach einem der Ansprüche 2 bis 4,
dadurch gekennzeichnet, dass die Empfangs-Filteranordnung (3) und die Sende-Filteranordnung (4) jeweils von einem Bandpass-Filter gebildet sind. - HF-Schaltungsanordnung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass die Empfangs-Filteranordnung (3) und die Sende-Filteranordnung (4) über einen gemeinsamen Schalter (2) mit einer Antennenanordnung (1) verbunden sind, welche sowohl die Empfangs-Antennenanordnung als auch die Sende-Antennenanordnung bildet. - HF-Schaltungsanordnung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass die Empfangs-Filteranordnung (3) und die Sende-Filteranordnung (4) von einem gemeinsamen abstimmbarer FE-Filter (15) gebildet sind, das über einen Schalter(2) mit dem externen rauscharmen Verstärker (5) des Empfangspfades und dem externen Leistungsverstärker (6) des Sendepfades verbindbar ist. - HF-Schaltungsanordnung nach Anspruch 1,
dadurch gekennzeichnet, dass das wenigstens eine abstimmbare HF-Zwischenfilter (19) im Sendepfad zwischen dem Vorverstärker (22) und dem Leistungsverstärker (24) vorgesehen ist, ein zweites abstimmbares HF-Zwischenfilter (23) zwischen dem externen rauscharmen Verstärker (18) und dem internen rauscharmen Verstärker (20) im Empfangspfad vorgesehen ist, wobei die Empfangs-Filteranordnung und die Sende-Filteranordnung von einem Duplexer (17) gebildet sind. - HF-Schaltungsanordnung nach Anspruch 8,
dadurch gekennzeichnet, dass der Duplexer (27) abstimmbar ist. - HF-Schaltungsanordnung nach einem der Ansprüche 8 oder 9,
dadurch gekennzeichnet, dass der Duplexer (17, 27) mit einer Antennenanordnung (1) verbunden ist, die sowohl die Empfangs-Antennenanordnung als auch die Sende-Antennenanordnung bildet. - HF-Schaltungsanordnung nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet, dass das abstimmbare HF-Zwischenfilter (7), schmalbandiger ausgeführt ist als eine zugeordnete Filteranordnung von der Empfangs-Filteranordnung (3) und der Sende-Filteranordnung (4).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10336527 | 2003-08-05 | ||
DE10336527 | 2003-08-05 |
Publications (1)
Publication Number | Publication Date |
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EP1505682A1 true EP1505682A1 (de) | 2005-02-09 |
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Application Number | Title | Priority Date | Filing Date |
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EP04018540A Withdrawn EP1505682A1 (de) | 2003-08-05 | 2004-08-05 | HF-Schaltungsanordnung für mobile Kommunikationsendgeräte |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013142527A1 (en) * | 2012-03-19 | 2013-09-26 | Qualcomm Incorporated | Limited q factor tunable front end using tunable circuits and microelectromechanical system (mems) |
CN105049077A (zh) * | 2015-05-28 | 2015-11-11 | 络达科技股份有限公司 | 宽带前端装置及其过滤射频信号的方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6307448B1 (en) * | 1998-08-05 | 2001-10-23 | Murata Manufacturing Co., Ltd. | Frequency-variable-type filter, antenna duplexer, and communication apparatus |
JP2002208873A (ja) * | 2001-01-09 | 2002-07-26 | Hitachi Metals Ltd | アンテナスイッチ積層モジュール複合部品 |
EP1324420A1 (de) * | 1997-05-30 | 2003-07-02 | Murata Manufacturing Co., Ltd. | Dielektrisches Filter,dielektrischer Duplexer und Kommunikationsgerät |
-
2004
- 2004-08-05 EP EP04018540A patent/EP1505682A1/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1324420A1 (de) * | 1997-05-30 | 2003-07-02 | Murata Manufacturing Co., Ltd. | Dielektrisches Filter,dielektrischer Duplexer und Kommunikationsgerät |
US6307448B1 (en) * | 1998-08-05 | 2001-10-23 | Murata Manufacturing Co., Ltd. | Frequency-variable-type filter, antenna duplexer, and communication apparatus |
JP2002208873A (ja) * | 2001-01-09 | 2002-07-26 | Hitachi Metals Ltd | アンテナスイッチ積層モジュール複合部品 |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 11 6 November 2002 (2002-11-06) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013142527A1 (en) * | 2012-03-19 | 2013-09-26 | Qualcomm Incorporated | Limited q factor tunable front end using tunable circuits and microelectromechanical system (mems) |
US8977216B2 (en) | 2012-03-19 | 2015-03-10 | Qualcomm Incorporated | Limited Q factor tunable front end using tunable circuits and microelectromechanical system (MEMS) |
CN105049077A (zh) * | 2015-05-28 | 2015-11-11 | 络达科技股份有限公司 | 宽带前端装置及其过滤射频信号的方法 |
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