GB2235855A - Radio-frequency transmitting and receiving circuit uses pin diode switch - Google Patents
Radio-frequency transmitting and receiving circuit uses pin diode switch Download PDFInfo
- Publication number
- GB2235855A GB2235855A GB9017684A GB9017684A GB2235855A GB 2235855 A GB2235855 A GB 2235855A GB 9017684 A GB9017684 A GB 9017684A GB 9017684 A GB9017684 A GB 9017684A GB 2235855 A GB2235855 A GB 2235855A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pin diode
- radio frequency
- transmission
- diode switch
- reception
- 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- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
-
- 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
- H04B1/44—Transmit/receive switching
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
Abstract
Pin diode switch 10 switches a radio frequency signal to antenna 15 in response to a mode selection of reception or transmission a low noise amplifier 11 amplifies with low noise the radio frequency signal from switch 10 to increase reception sensitivity at the receive section and a first band pass filter 13 filters the output radio frequency signal from amplifier 11 to provide a given band characteristic and to remove therefrom an image signal and a spurious signal. A second band pass filter 14 removes unnecessary signals such as a local oscillating signal and harmonic frequencies out of a carrier wave transmission signal supplied from a transmitting end Tx, and power amplifier 12 amplifies the output from filter 14 to increase power of the radio frequency transmission carrier wave. <IMAGE>
Description
RADIO-FREOUENCY TRANSMITIWG AND RECEIVING CIRCUIT FOR
MOBILE TELECOMMQATION SYSTEM
The invention relates to a radio frequency (RF) transmitting and receiving circuit for use in a mobile telecommunication system.
Schematic diagrams of known duplexer telecommunication systems are shown in Figures 1A and 1B of the accompanying diagrammatic drawings, of which
Figure 1A illustrates a single-body type of duplexer and Figure 1B illustrates a twobody type of duplexer, wherein BPFl designates a band pass filter of a receiver section and BPF2 designates a band pass filter of a transmitter section, LNA denotes a low noise amplifier, and PA denotes a power amplifier. These known duplexers could be applied to a concurrent operation of reception and transmission, as well as a separate operation thereof.The above described duplexer systems provide conventional two-way telecommunication through a receiving channel having the band-pass filter (BPF1) and low-noise amplifier (LNA), and a transmitting channel having the power amplifier (PA) and band-pass filter (BPF2), with a receiving end (Rx) and a transmitting end (Tx).
However, such duplexer systems have some drawbacks. First, it is almost impossible to decrease frequencies of the receiver and transmitter below a prescribed range. That is, as the frequencies of the receiver and transmitter become close to each other, isolation between the transmitting section and the receiving section by the band-pass filters becomes less feasible. Secondly, insertion loss in the receiver, which is normally 2 to 3 dB(decibels), results in low reception sensitivity, since it exists in an input stage of the receiver. Lastly, as insertion loss in the transmitter is normally about 3 dB, an excessive output is required in the power amplifier to raise transmitting power at an antenna 15.
Preferred embodiments of the invention aim to provide improved arrangements for radio frequency transmission circuits, capable of improving reception sensitivity and transmitting power, in mobile telecommunication systems where transmitting and receiving operations of the radio frequency signal are not carried out concurrently.
According to a first aspect of the invention, there is provided a radio frequency reception and transmission circuit for use in a mobile telecommunication apparatus, the circuit comprising a pin diode switch for switching a radio frequency signal to and through an antenna in response to selection of reception or transmission mode and for providing isolation between a receive section and a transmit section of the circuit.
Preferably, the circuit further comprises a low noise amplifier coupled with the pin diode switch, for amplifying with low noise radio frequency signals from the pin diode switch, to increase reception sensitivity at the receive section.
Preferably, the circuit further comprises a band pass filter coupled with the low noise amplifier, for filtering radio frequency signals output from the low noise amplifier so as to provide a given band characteristic and to remove therefrom image and spurious signals, and to provide an output to a receiving end.
Preferably, the circuit further comprises a band pass filter coupled with a transmitting end for removing unnecessary signals such as a local oscillating signal and harmonic frequencies out of a carrier wave transmission signal supplied from the transmitting end, so that only a specified frequency range of transmission signal is radiated through the antenna.
Preferably, the circuit further comprises a power amplifier coupled to the pin diode switch, for amplifying the output from the band pass filter that is coupled to the transmitting end, for increasing power of the radio frequency transmission carrier wave.
Preferably, the pin diode switch comprises three pin diodes for isolation between the transmit section and the receive section where frequencies thereof are close to each other.
Preferably, the pin diode switch has an insertion loss not exceeding 1decibel.
Preferably, in use, reception and transmission are not carried out concurrently.
In a second aspect, the invention provides a mobile telecommunication apparatus provided with a reception and transmission circuit as above, according to the first aspect of the invention.
For a better understanding of the invention, and to show how the same may be carried into effect, reference will now be made, by way of example, to Figure 2 of the accompanying diagrammatic drawings, which shows a block diagram of a preferred embodiment of a circuit arrangement according to the invention.
Referring to Figure 2, a pin diode switch 10 switches an RF transmission signal to and through an antenna 15. The pin diode switch is used to maintain enough isolation between a transmit circuit and a receive circuit where frequencies of the transmit and receive circuits are close to each other. The isolation between the transmit and receive circuits is dependent upon the number of the pin diodes used therein. For example, three pin diodes provides about 4edB isolation. Since insertion loss of the pin diode does not exceed, in general, about l-dB, the noise characteristic can be improved by about 2-dB.
A low noise amplifier 11 amplifies the RF signal from the pin diode switch 10 into a low noise signal to increase reception sensitivity at the receiving circuit.
A first band pass filter 13 filters the output RF signal from the low noise amplifier 11 so as to provide a given band characteristic and to remove therefrom image signals and spurious signals, and has an output coupled with a receiving end Rx.
A second band pass filter 14 coupled with a transmitting end Tx removes various unnecessary signal such as local oscillating signal, harmonic frequencies, etc. out of a transmission signal supplied from a transmitter, so that only a specified frequency range of transmission signal is radiated through the antenna. A power amplifier 12 coupled to the pin diode switch amplifies the output from the second band pass filter 14 for increasing the power of the RF transmission carrier wave.
An RF receive signal from the antenna 15 is supplied into the low noise amplifier 11 through the pin diode switch 10 operating in receiving mode and then amplified with low noise. The first band pass filter 13 removes various unnecessary signals from the amplified RF receive signal for adaptation to a given band characteristic to the receiver circuit which is connected via the receiving end Rx.
In transmitting mode, a pin diode of the pin diode switch 10 which is connected to the receiving circuit is turned off, while another pin diode connected to the transmitting circuit is turned on. Therefore, a carrier wave, that is, a transmission signal from the transmitting end Tx with information to be transmitted, passes through the second band pass filter 14 and is amplified into high power at the power amplifier 12. The pin diode switch 10 that operates in transmitting mode switches the amplified carrier wave to the antenna for radiation into the air. To prevent the high power transmission signal from flowing into the low noise amplifier 11, the isolation in the pin diode switch would be preferably 40-dB.
The embodiment of the invention described above achieves considerable improvement, at least by 2-dB, of reception sensitivity and transmission power in a mobile telecommunication system with isolated transmitting and receiving operation, by adopting the pin diode switch at the entrance stage of the transmit and receive circuits.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that modifications in detail may be made without departing from the spirit and scope of the invention.
The reader's attention is directed to all papers and documents which are filed concurrently with or previous to this specification and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.
All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at last some of such features and/or steps are mutually exclusive.
Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
The invention is not restricted to the details of the foregoing embodiment(s).
The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.
Claims (10)
1. A radio frequency reception and transmission circuit for use in a mobile telecommunication apparatus, the circuit comprising a pin diode switch for switching a radio frequency signal to and through an antenna in response to selection of reception or transmission mode and for providing isolation between a receive section and a transmit section of the circuit.
2. A circuit according to Claim 1, further comprising a low noise amplifier coupled with the pin diode switch, for amplifying with low noise radio frequency signals from the pin diode switch, to increase reception sensitivity at the receive section.
3. A circuit according to Claim 2, further comprising a band pass filter coupled with the low noise amplifier, for filtering radio frequency signals output from the low noise amplifier so as to provide a given band characteristic and to remove therefrom image and spurious signals, and to provide an output to a receiving end.
4. A ciruit according to Claim 1, 2 or 3, further comprising a band pass filter coupled with a transmitting end for removing unnecessary signals such as a local oscillating signal and harmonic frequencies out of a carrier wave transmission signal supplied from the transmitting end, so that only a specified frequency range of transmission signal is radiated through the antenna.
5. A circuit according to Claim 4, further comprising a power amplifier coupled to the pin diode switch, for amplifying the output from the band pass filter that is coupled to the transmitting end, for increasing power of the radio frequency transmission carrier wave.
6. A circuit according to any of the preceding claims, wherein the pin diode switch comprises three pin diodes for isolation between the transmit section and the receive section where frequencies thereof are close to each other.
7. A circuit according to any of the preceding claims, wherein the pin diode switch has an insertion loss not exceeding l-decibel.
8. A circuit according to any of the preceding claims, wherein, in use, reception and transmission are not carried out concurrently.
9. A reception and transmission circuit substantially as hereinbefore described with reference to Figure 2 of the accompanying drawings.
10. A mobile telecommunication apparatus provided with a reception and transmission circuit according to any of the preceding claims.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019890011515A KR910005602A (en) | 1989-08-12 | 1989-08-12 | RF transmission / reception circuit of mobile communication equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9017684D0 GB9017684D0 (en) | 1990-09-26 |
| GB2235855A true GB2235855A (en) | 1991-03-13 |
Family
ID=19288886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9017684A Withdrawn GB2235855A (en) | 1989-08-12 | 1990-08-13 | Radio-frequency transmitting and receiving circuit uses pin diode switch |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH0378329A (en) |
| KR (1) | KR910005602A (en) |
| DE (1) | DE4025466A1 (en) |
| GB (1) | GB2235855A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0729239A1 (en) * | 1995-02-24 | 1996-08-28 | Murata Manufacturing Co., Ltd. | Antenna sharing device |
| WO2000019619A1 (en) * | 1998-09-25 | 2000-04-06 | Conexant Systems, Inc. | Device, system and method for low noise radio frequency transmission |
| GB2374203A (en) * | 2001-04-06 | 2002-10-09 | Alexander Dodd | Transmit / receive antenna system with higher receive gain |
| WO2003103156A2 (en) * | 2002-05-16 | 2003-12-11 | Addvalue Technologies Ltd | A radio frequency circuit |
| US7262657B2 (en) | 2005-03-21 | 2007-08-28 | Skyworks Solutions, Inc. | Bias control for reducing amplifier power consumption and maintaining linearity |
| US7446612B2 (en) | 2006-09-08 | 2008-11-04 | Skyworks Solutions, Inc. | Amplifier feedback and bias configuration |
| US7471154B2 (en) | 2006-08-08 | 2008-12-30 | Skyworks Solutions, Inc. | Bias circuit for maintaining high linearity at cutback power conditions |
| US7493097B2 (en) | 2005-07-07 | 2009-02-17 | Skyworks Solutions, Inc. | High dynamic range compact mixer output stage for a wireless receiver |
| US7493093B2 (en) | 2005-04-27 | 2009-02-17 | Skyworks Solutions, Inc. | Switchable power level detector for multi-mode communication device |
| US7696826B2 (en) | 2006-12-04 | 2010-04-13 | Skyworks Solutions, Inc. | Temperature compensation of collector-voltage control RF amplifiers |
| US7729674B2 (en) | 2007-01-09 | 2010-06-01 | Skyworks Solutions, Inc. | Multiband or multimode receiver with shared bias circuit |
| CN108173568A (en) * | 2017-12-11 | 2018-06-15 | 大连昊洋科技发展有限公司 | A kind of Large-power High-Speed radio-frequency receiving-transmitting switching device and method, wireless communication system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04341026A (en) * | 1991-05-17 | 1992-11-27 | Nec Corp | Tdma system radio communication equipment |
| DE19535360A1 (en) * | 1995-09-22 | 1997-03-27 | Siemens Ag | Method for allocating radio resources to several transmission devices of a base station within a radio communication system |
| DE29706463U1 (en) * | 1997-04-11 | 1997-10-02 | Paulus, Patrick Bernhard, 88471 Laupheim | Active module for decoupling transmission u. Receiving antenna |
| KR19990061185A (en) * | 1997-12-31 | 1999-07-26 | 유기범 | Mobile terminal with power saving function when transmitting and receiving data |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2362889A1 (en) * | 1973-12-18 | 1975-06-19 | Standard Elektrik Lorenz Ag | RADIO TRANSMITTER / RECEIVER |
| DE2426506A1 (en) * | 1974-05-31 | 1975-12-04 | Standard Elektrik Lorenz Ag | RADIO TRANSMITTER / RECEIVER |
| GB1579075A (en) * | 1976-08-17 | 1980-11-12 | Licentia Gmbh | Electronic hf switch |
| GB2097226A (en) * | 1981-04-14 | 1982-10-27 | Int Standard Electric Corp | A wide band transmitting/receiving switch |
| US4361905A (en) * | 1980-11-10 | 1982-11-30 | General Electric Company | Arrangement for connecting selected antennas to a radio for transmitting and receiving |
| JPS59135933A (en) * | 1983-01-25 | 1984-08-04 | Matsushita Electric Ind Co Ltd | Antenna switching circuit |
| EP0151014A2 (en) * | 1984-01-27 | 1985-08-07 | Nec Corporation | Radio transceiver including an antenna switching circuit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4931214A (en) * | 1972-07-15 | 1974-03-20 | ||
| JPS5773533A (en) * | 1980-10-24 | 1982-05-08 | Hitachi Denshi Ltd | Antenna switch circuit |
| GB2120905B (en) * | 1982-01-25 | 1986-03-19 | Viking Phone Co Inc | Cordless telephone |
| JPS59221035A (en) * | 1983-05-31 | 1984-12-12 | Yuniden Kk | Radio transmitting and receiving device |
-
1989
- 1989-08-12 KR KR1019890011515A patent/KR910005602A/en not_active Application Discontinuation
-
1990
- 1990-08-08 JP JP2211445A patent/JPH0378329A/en active Pending
- 1990-08-10 DE DE4025466A patent/DE4025466A1/en not_active Ceased
- 1990-08-13 GB GB9017684A patent/GB2235855A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2362889A1 (en) * | 1973-12-18 | 1975-06-19 | Standard Elektrik Lorenz Ag | RADIO TRANSMITTER / RECEIVER |
| DE2426506A1 (en) * | 1974-05-31 | 1975-12-04 | Standard Elektrik Lorenz Ag | RADIO TRANSMITTER / RECEIVER |
| GB1579075A (en) * | 1976-08-17 | 1980-11-12 | Licentia Gmbh | Electronic hf switch |
| US4361905A (en) * | 1980-11-10 | 1982-11-30 | General Electric Company | Arrangement for connecting selected antennas to a radio for transmitting and receiving |
| GB2097226A (en) * | 1981-04-14 | 1982-10-27 | Int Standard Electric Corp | A wide band transmitting/receiving switch |
| JPS59135933A (en) * | 1983-01-25 | 1984-08-04 | Matsushita Electric Ind Co Ltd | Antenna switching circuit |
| EP0151014A2 (en) * | 1984-01-27 | 1985-08-07 | Nec Corporation | Radio transceiver including an antenna switching circuit |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0729239A1 (en) * | 1995-02-24 | 1996-08-28 | Murata Manufacturing Co., Ltd. | Antenna sharing device |
| WO2000019619A1 (en) * | 1998-09-25 | 2000-04-06 | Conexant Systems, Inc. | Device, system and method for low noise radio frequency transmission |
| US6614837B1 (en) | 1998-09-25 | 2003-09-02 | Skyworks Solutions, Inc. | Device system and method for low noise radio frequency transmission |
| GB2374203A (en) * | 2001-04-06 | 2002-10-09 | Alexander Dodd | Transmit / receive antenna system with higher receive gain |
| WO2003103156A2 (en) * | 2002-05-16 | 2003-12-11 | Addvalue Technologies Ltd | A radio frequency circuit |
| WO2003103156A3 (en) * | 2002-05-16 | 2004-10-07 | Addvalue Technologies Ltd | A radio frequency circuit |
| US7262657B2 (en) | 2005-03-21 | 2007-08-28 | Skyworks Solutions, Inc. | Bias control for reducing amplifier power consumption and maintaining linearity |
| US7493093B2 (en) | 2005-04-27 | 2009-02-17 | Skyworks Solutions, Inc. | Switchable power level detector for multi-mode communication device |
| US7493097B2 (en) | 2005-07-07 | 2009-02-17 | Skyworks Solutions, Inc. | High dynamic range compact mixer output stage for a wireless receiver |
| US7471154B2 (en) | 2006-08-08 | 2008-12-30 | Skyworks Solutions, Inc. | Bias circuit for maintaining high linearity at cutback power conditions |
| US7446612B2 (en) | 2006-09-08 | 2008-11-04 | Skyworks Solutions, Inc. | Amplifier feedback and bias configuration |
| US7696826B2 (en) | 2006-12-04 | 2010-04-13 | Skyworks Solutions, Inc. | Temperature compensation of collector-voltage control RF amplifiers |
| US7729674B2 (en) | 2007-01-09 | 2010-06-01 | Skyworks Solutions, Inc. | Multiband or multimode receiver with shared bias circuit |
| CN108173568A (en) * | 2017-12-11 | 2018-06-15 | 大连昊洋科技发展有限公司 | A kind of Large-power High-Speed radio-frequency receiving-transmitting switching device and method, wireless communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| KR910005602A (en) | 1991-03-30 |
| JPH0378329A (en) | 1991-04-03 |
| GB9017684D0 (en) | 1990-09-26 |
| DE4025466A1 (en) | 1991-02-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |