CN201976093U - Four-frequency range GSM (Global System for Mobile Communications) receiving and transmitting device and wireless terminal - Google Patents
Four-frequency range GSM (Global System for Mobile Communications) receiving and transmitting device and wireless terminal Download PDFInfo
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- CN201976093U CN201976093U CN2010206657599U CN201020665759U CN201976093U CN 201976093 U CN201976093 U CN 201976093U CN 2010206657599 U CN2010206657599 U CN 2010206657599U CN 201020665759 U CN201020665759 U CN 201020665759U CN 201976093 U CN201976093 U CN 201976093U
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- 238000010295 mobile communication Methods 0.000 title abstract description 4
- 238000010897 surface acoustic wave method Methods 0.000 claims description 25
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- 238000013461 design Methods 0.000 description 5
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- 230000005540 biological transmission Effects 0.000 description 3
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- 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
- H04B1/0053—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 with common antenna for more than one band
- H04B1/006—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 with common antenna for more than one band using switches for selecting the desired band
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Abstract
The utility model discloses a four-frequency range GSM (Global System for Mobile Communications) receiving and transmitting device and a wireless terminal. The GSM receiving and transmitting device comprises an antenna, a double-frequency antenna switch, two radio-frequency integrated devices and a radio-frequency receiving and transmitting device with two receiving channels, wherein the double-frequency antenna switch is connected with the antenna and the two radio-frequency integrated devices respectively; the input ends of the two radio-frequency integrated devices are respectively connected to two receiving frequency-range channels corresponding to the double-frequency antenna switch, wherein each radio-frequency integrated device is a device integrating a single-pole double-throw switch and filters corresponding to two frequency ranges; and each receiving channel is respectively connected with the output end of one radio-frequency integrated device. With the technical scheme, the GSM receiving and transmitting device can reduce the layout wiring difficulty and furthest reduces the hardware cost of a four-frequency GSM scheme.
Description
Technical Field
The utility model relates to the field of communications, particularly, relate to a four frequency channel global system for Mobile Communication (GSM for short) transceiver and wireless terminal.
Background
Due to the popularization of terminal products such as GSM mobile phones and the like and the advantage of low cost, the market share is high, and the low-end mobile phones which are common at present are basically GSM dual-frequency mobile phones, which is because the design of the GSM four-frequency mobile phones brings high cost at present.
At present, a four-band GSM mobile phone needs to use a single-pole six-throw antenna switch, a radio frequency Power Amplifier (PA) with a four-frequency transmission function and a port, and a Surface Acoustic Wave (SAW) filter is respectively matched on four frequency bands, and finally enters radio frequency Transceiver chips (RF transceivers) of four receiving channels (GSM900/GSM1800/GSM850/GSM 1900). See in particular fig. 1 and 2.
Fig. 1 is a hardware architecture diagram of a quad-band transmitter and receiver in the related art. Fig. 2 is a diagram of a logic control configuration of the conventional quad-band transmitter and receiver shown in fig. 1. As can be seen from fig. 2, the transmitter has two transmission lines and four reception lines, so that the antenna switch is single-pole six-throw, and six states are required, i.e., the antenna switch has six logic states. And the receiver also needs four sets of differential pairs to complete the reception of the four frequency bands. Therefore, it can be concluded that the scheme of fig. 1 causes the antenna switch to have many states, and the number of pins of the transmitter and the receiver is also many, which not only increases the hardware cost of the transmitter and the receiver, but also causes the difficulty of routing the lines due to the many pins and lines for transmitting and receiving.
SUMMERY OF THE UTILITY MODEL
The pin to four frequency GSM transmitters and receivers among the correlation technique is more, leads to the overall arrangement to walk the difficulty and the hardware cost increase scheduling problem of line, the utility model provides a four frequency channel GSM transceiver and wireless terminal to solve at least one of above-mentioned problem.
According to an aspect of the utility model, a four frequency channel GSM transceiver is provided.
According to the utility model discloses a four frequency channel GSM send-receiver device except including: the antenna, transceiver device still include: the dual-frequency antenna switch is respectively connected with the antenna and the two radio frequency integrated devices; the input ends of the two radio frequency integrated devices are respectively connected to the two receiving frequency band channels corresponding to the double-frequency antenna switch, wherein each radio frequency integrated device is a device integrating a single-pole double-throw switch and a filter corresponding to the two frequency bands; and the radio frequency transceiver chip is provided with two receiving channels, wherein each receiving channel is respectively connected with the output end of one radio frequency integrated device.
Further, the above-mentioned radio frequency integrated device includes: the single-pole double-throw switch is connected to a receiving frequency band channel corresponding to the double-frequency antenna switch; the input end of the first single-frequency band surface acoustic wave SAW filter is connected with the first end of the single-pole double-throw switch; and the input end of the second single-band SAW filter is connected with the second end of the single-pole double-throw switch.
Further, the above-mentioned radio frequency integrated device includes: the single-pole double-throw switch is connected to a receiving frequency band channel corresponding to the double-frequency antenna switch; and the input end of the double-frequency band SAW filter is connected with the single-pole double-throw switch.
Furthermore, filters corresponding to two frequency bands in one radio frequency integrated device are high-frequency band filters, wherein the frequency band corresponding to the high-frequency band filters is higher than a preset threshold value; and the filters corresponding to the two frequency bands in the other radio frequency integrated device are low-frequency band filters, wherein the frequency band corresponding to the low-frequency band filter is lower than a preset threshold value.
Further, the rf transceiver chip includes: a low-frequency LNA and a high-frequency LNA; the high-frequency band filter is connected with the high-frequency LNA through a receiving channel of the radio frequency transceiving chip; the low-frequency band filter is connected with the low-frequency LNA through the other receiving channel of the radio frequency transceiving chip.
Further, the frequency bands corresponding to the high-frequency band filter are a GSM1800 frequency band and a GSM1900 frequency band; the frequency bands corresponding to the low-frequency band filter are a GSM850 frequency band and a GSM900 frequency band.
Further, the transceiver device further includes: the radio frequency power amplifier is positioned on a transmitting channel between the dual-frequency antenna switch and the radio frequency transceiving chip; the dual-frequency antenna switch and the radio frequency power amplifier are integrated in a radio frequency transmitting module.
Furthermore, the antenna is a passive device with a four-frequency transceiving function.
According to the utility model discloses an on the other hand, the utility model also provides a wireless terminal.
According to the utility model discloses a wireless terminal includes aforementioned any kind of four frequency channels GSM transceiver.
Through the utility model discloses, adopt dual-frenquency antenna switch and radio frequency integrated device to select suitable SAW filter to realize the four frequently schemes of GSM, it is more to have solved the pin of four frequently GSM transmitters and receivers among the correlation technique, leads to the overall arrangement to walk the difficulty of line and hardware cost increase scheduling problem, and then can reduce the overall arrangement and walk the difficulty of line, reduces the hardware cost of four frequently GSM schemes to the at utmost.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
FIG. 1 is a block diagram of a hardware design architecture for a quad-band transmitter and receiver in the related art;
FIG. 2 is a diagram of a quad-band transmit and receiver logic control configuration shown in FIG. 1;
fig. 3 is a hardware design architecture diagram of a four-band GSM transceiver according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a radio frequency integrated device integrated with a high-band filter according to a preferred embodiment of the present invention;
fig. 5 is a schematic structural diagram of a radio frequency integrated device integrated with a low band filter according to a preferred embodiment of the present invention;
fig. 6 is a diagram of a logic control configuration of a quad-band GSM transceiver according to a preferred embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
According to the embodiment of the utility model provides a four frequency channel GSM transceiver is provided.
Fig. 3 is a hardware design architecture diagram of a four-band GSM transceiver according to an embodiment of the present invention. As shown in fig. 3, the quad-band GSM transceiver apparatus includes: the antenna 1, further includes: a dual-frequency antenna switch 3, two radio frequency integrated devices 4 and 5, and a radio frequency transceiver chip 6 with two receive channels. Wherein,
the double-frequency antenna switch 3 is respectively connected with the antenna 1 and two radio frequency integrated devices 4 and 5, wherein each radio frequency integrated device is a device integrating a single-pole double-throw switch and filters corresponding to two frequency bands;
the input ends of the two radio frequency integrated devices 4 and 5 are respectively connected to two receiving frequency channel corresponding to the double-frequency antenna switch;
and the radio frequency transceiver chip 6 is provided with two receiving channels, wherein each receiving channel is respectively connected with the output end of one radio frequency integrated device.
In the device, a double-frequency antenna switch (for example, a single-pole four-throw switch) and two single-pole double-throw switches are adopted to select a proper filter to realize the GSM four-frequency scheme, so that the problems of difficulty in layout and wiring, increase of hardware cost and the like caused by more pins of a four-frequency GSM transmitter and receiver in the related technology are solved, the difficulty in layout and wiring can be further reduced, and the hardware cost of the four-frequency GSM scheme is reduced to the maximum extent.
The antenna may be a passive device having a four-frequency transceiving function.
Wherein, the four-band GSM transceiver device may further include: and the radio frequency power amplifier is positioned on a transmitting channel between the dual-frequency antenna switch and the radio frequency transceiver chip, and in the specific implementation process, the dual-frequency antenna switch 3 and the radio frequency power amplifier 2 can be integrated in a radio frequency transmitting module or can be independently arranged.
Preferably, the components integrated in the radio frequency integrated device include, but are not limited to:
the single-pole double-throw switch is connected to a receiving frequency band channel corresponding to the double-frequency antenna switch;
the input end of the first single-frequency band SAW filter is connected with the first end of the single-pole double-throw switch;
and the input end of the second single-band SAW filter is connected with the second end of the single-pole double-throw switch.
Preferably, the components integrated in the radio frequency integrated device include, but are not limited to:
the single-pole double-throw switch is connected to a receiving frequency band channel corresponding to the double-frequency antenna switch;
and the input end of the double-frequency band SAW filter is connected with the single-pole double-throw switch.
In the implementation process, a single-pole double-throw switch and two single-band SAW filters can be integrated into the radio frequency integrated device, and a single-pole double-throw switch and a double-band SAW filter can also be integrated into the radio frequency integrated device. The filter can be switched between two frequency bands by switching the single-pole double-throw switch.
Preferably, the two frequency bands described above may be set one as a high frequency band and the other as a low frequency band.
That is, the filters corresponding to the two frequency bands in one of the two rf integrated devices may be set as high-band filters, where the frequency band corresponding to the high-band filter is higher than a predetermined threshold; the filters corresponding to the two frequency bands in the other one of the two rf integrated devices may be low-band filters, wherein the frequency band corresponding to the low-band filter is lower than a predetermined threshold.
The frequency bands corresponding to the high-frequency band filter are usually a GSM1800 frequency band and a GSM1900 frequency band, which can be specifically referred to fig. 4. The frequency bands corresponding to the low-band filter are generally a GSM850 frequency band and a GSM900 frequency band, and refer to fig. 5 specifically.
Fig. 4 illustrates the rf integrated device integrated with the high-band filter shown in fig. 3, which integrates a dual-band SAW filter with switch selection, and which is composed of a single-pole double-throw switch, a GSM1800/GSM1900 dual-band SAW filter chip and a matching circuit for combining the differential output thereof, and the electrical characteristics thereof should also meet the limit requirement of the frequency response of the previous basic.
Fig. 5 illustrates the rf integrated device integrated with the low band filter, the selective dual band SAW filter with switch shown in fig. 3, which is composed of a single pole double throw switch, a GSM850/GSM900 two band common SAW filter chip and a matching circuit combining its differential output, and its electrical characteristics should meet the previous limit requirement of the fundamental frequency response.
Preferably, the radio frequency transceiver chip includes but is not limited to: a low-frequency LNA and a high-frequency LNA; the high-frequency band filter can be connected with the high-frequency LNA through a receiving channel of the radio frequency transceiving chip; the low-frequency band filter is connected with the low-frequency LNA through the other receiving channel of the radio frequency transceiving chip.
In the preferred implementation process, a single-pole double-throw switch can be added on a low-frequency receiving channel to select GSM850 and GSM900, so that the signals enter different SAW filters, and the differential output channels of the two SAW filters are merged and then enter a low-frequency LNA of a radio frequency transceiver chip for the next processing; a single-pole double-throw switch is also added on a high-frequency receiving channel to select GSM1800 and GSM1900 so as to enter different SAW filters, and the differential output channels of the SAW filters are merged and then enter a radio-frequency transceiving chip high-frequency LNA for further processing.
The above preferred embodiment is described below in connection with the example of fig. 6.
Fig. 6 is a diagram of a logic control configuration of a quad-band GSM transceiver according to an embodiment of the present invention. As shown in fig. 6, the quad-band GSM transceiver apparatus includes: the antenna 1 and the radio frequency Power Amplifier (PA)2 may further include: the antenna comprises a single-pole four-throw double-frequency antenna switch 3, two radio frequency integrated devices 4 and 5 and a radio frequency transceiving chip 6 with two receiving channels.
The single-pole four-throw double-frequency antenna switch 3 is respectively connected with the antenna, the radio frequency power amplifier and the two radio frequency integrated devices;
the input ends of two rf integrated devices 4 and 5 are respectively connected to two receiving frequency channels corresponding to the dual-band antenna switch, wherein the first rf integrated device 4 is a device integrating a single-pole double-throw switch and two single-frequency filters (GSM850 filter and GSM900 filter), and the second rf integrated device 5 is a device integrating a single-pole double-throw switch and two single-frequency filters (GSM 1800 filter and GSM1900 filter). As can be seen from fig. 6, the single-pole double-throw switch is integrated at the front end of the single-frequency filter, so that the four-frequency functional requirement is conveniently realized through the processing, and the layout and routing are more simplified;
and the radio frequency transceiver chip 6 is provided with two receiving channels, wherein each receiving channel is respectively connected with the output end of one radio frequency integrated device.
It should be noted that, as shown in fig. 6, a transmission channel of the radio frequency transceiver chip is connected to the PA2, and the radio frequency transceiver chip sends out a signal through the PA and the antenna, which may be referred to in the related art specifically, and is not described herein again.
Furthermore, two novel radio frequency integrated devices are added on the receiving channels of the single-pole four-throw double-frequency antenna switch and the radio frequency transceiver chip, so that the frequency band can be selected. Specifically, a single-pole double-throw switch in a radio frequency integrated device on a low-frequency receiving channel selects GSM850 and GSM900, so that the signals enter different SAW filters in the radio frequency integrated device, and differential output channels of the SAW filters are merged and then enter a low-frequency LNA of a radio frequency transceiving chip for next processing; the single-pole double-throw switch in the radio frequency integrated device on the high-frequency receiving channel selects GSM1800 and GSM1900, so that the signals enter different SAW filters in the radio frequency integrated device, and the differential output channels of the signals are merged and then enter a radio frequency receiving and transmitting chip high-frequency LNA for further processing.
According to the embodiment of the utility model provides a, still provide a wireless terminal, this wireless terminal includes but not limited to above-mentioned four frequency channel GSM transceiver. The four-band GSM transceiver can refer to the descriptions in fig. 3 to fig. 6, and details are not repeated here.
In summary, with the help of the present invention, a novel rf integrated device in a four-band GSM transceiver device is adopted, so that a GSM four-band scheme can be easily implemented. The novel radio frequency integrated device selects an accurate SAW filter receiving channel by means of proper logic control, realizes strict filtering processing before entering a radio frequency transceiver chip, and ensures that the receiving performance of a terminal meets the design requirements. In the aspect of circuit implementation, the layout and the routing are simplified, and precious space is strived for increasing integration requirements.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and optionally they may be implemented by program code executable by a computing device, such that they may be stored in a memory device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that shown or described herein, or separately fabricated as individual integrated circuit modules, or multiple ones of them fabricated as a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A four-band GSM transceiver device comprises: an antenna, wherein the transceiver further comprises:
the dual-frequency antenna switch is respectively connected with the antenna and the two radio frequency integrated devices;
the input ends of the two radio frequency integrated devices are respectively connected to the two receiving frequency band channels corresponding to the double-frequency antenna switch, wherein each radio frequency integrated device is a device integrating a single-pole double-throw switch and filters corresponding to the two frequency bands;
and the radio frequency transceiver chip is provided with two receiving channels, wherein each receiving channel is respectively connected with the output end of one radio frequency integrated device.
2. The transceiver apparatus of claim 1, wherein the rf integrated device comprises:
the single-pole double-throw switch is connected to a receiving frequency band channel corresponding to the double-frequency antenna switch;
the input end of the first single-frequency band surface acoustic wave SAW filter is connected with the first end of the single-pole double-throw switch;
and the input end of the second single-band SAW filter is connected with the second end of the single-pole double-throw switch.
3. The transceiver apparatus of claim 1, wherein the rf integrated device comprises:
the single-pole double-throw switch is connected to a receiving frequency band channel corresponding to the double-frequency antenna switch;
and the input end of the double-frequency band SAW filter is connected with the single-pole double-throw switch.
4. Transceiver device according to claim 1,
the filters corresponding to the two frequency bands in one radio frequency integrated device are high-frequency band filters, wherein the frequency band corresponding to the high-frequency band filter is higher than a preset threshold value;
and the filters corresponding to the two frequency bands in the other radio frequency integrated device are low-frequency band filters, wherein the frequency band corresponding to the low-frequency band filter is lower than the preset threshold value.
5. The transceiver device of claim 4, wherein the RF transceiver chip comprises: a low-frequency LNA and a high-frequency LNA;
the high-frequency band filter is connected with the high-frequency LNA through one receiving channel of the radio frequency transceiving chip;
and the low-frequency band filter is connected with the low-frequency LNA through the other receiving channel of the radio frequency transceiving chip.
6. Transceiver device according to claim 4,
the frequency bands corresponding to the high-frequency band filter are a GSM1800 frequency band and a GSM1900 frequency band;
the frequency bands corresponding to the low-frequency filter are a GSM850 frequency band and a GSM900 frequency band.
7. Transceiver device according to claim 1,
the transceiver device further includes: the radio frequency power amplifier is positioned on a transmitting channel between the dual-frequency antenna switch and the radio frequency transceiving chip;
the dual-frequency antenna switch and the radio frequency power amplifier are integrated in a radio frequency transmitting module.
8. The transceiver of claim 1, wherein the antenna is a passive device with four-frequency transceiving function.
9. A wireless terminal, characterized in that it comprises a quad band GSM transceiver apparatus as claimed in any one of claims 1 to 8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206657599U CN201976093U (en) | 2010-12-17 | 2010-12-17 | Four-frequency range GSM (Global System for Mobile Communications) receiving and transmitting device and wireless terminal |
| PCT/CN2011/071463 WO2012079309A1 (en) | 2010-12-17 | 2011-03-02 | Quad-band global system for mobile communicaiton (gsm) transceiving device and wireless terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206657599U CN201976093U (en) | 2010-12-17 | 2010-12-17 | Four-frequency range GSM (Global System for Mobile Communications) receiving and transmitting device and wireless terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201976093U true CN201976093U (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206657599U Expired - Fee Related CN201976093U (en) | 2010-12-17 | 2010-12-17 | Four-frequency range GSM (Global System for Mobile Communications) receiving and transmitting device and wireless terminal |
Country Status (2)
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| CN (1) | CN201976093U (en) |
| WO (1) | WO2012079309A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332929A (en) * | 2011-09-23 | 2012-01-25 | 中兴通讯股份有限公司 | Dual-mode radio frequency module, dual-mode radio frequency sending and receiving method and user terminal |
| JP2018061280A (en) * | 2012-09-03 | 2018-04-12 | 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． | Apparatus and method for selecting frequency band |
| CN111262597A (en) * | 2020-01-17 | 2020-06-09 | 深圳市普威技术有限公司 | Novel radio frequency device, radio frequency device control method and wireless equipment |
| CN111934708A (en) * | 2020-08-04 | 2020-11-13 | 西安博瑞集信电子科技有限公司 | Signal processing module applied to radio frequency transceiving link |
| CN112968710A (en) * | 2019-12-13 | 2021-06-15 | 航天信息股份有限公司 | Multi-band radio frequency circuit |
| CN113055042A (en) * | 2021-03-09 | 2021-06-29 | 维沃移动通信有限公司 | Radio frequency circuit and electronic device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI112561B (en) * | 1999-06-10 | 2003-12-15 | Nokia Corp | Transmitter / receiver for transmitting and receiving an RF signal in at least two frequency ranges |
| CN201018628Y (en) * | 2007-01-19 | 2008-02-06 | 英华达(上海)电子有限公司 | Dual-mode intelligent mobile phone |
| CN102439789B (en) * | 2008-12-24 | 2014-08-06 | 豪沃基金有限责任公司 | RF front-end module and antenna system |
| CN101882941A (en) * | 2010-07-07 | 2010-11-10 | 中兴通讯股份有限公司 | Device and equipment for quadruple-frequency transceiving of global mobile communication system |
-
2010
- 2010-12-17 CN CN2010206657599U patent/CN201976093U/en not_active Expired - Fee Related
-
2011
- 2011-03-02 WO PCT/CN2011/071463 patent/WO2012079309A1/en active Application Filing
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332929A (en) * | 2011-09-23 | 2012-01-25 | 中兴通讯股份有限公司 | Dual-mode radio frequency module, dual-mode radio frequency sending and receiving method and user terminal |
| WO2012152034A1 (en) * | 2011-09-23 | 2012-11-15 | 中兴通讯股份有限公司 | Dual-mode radio frequency module, dual-mode radio frequency transmitting and receiving method and user terminal |
| CN102332929B (en) * | 2011-09-23 | 2016-08-03 | 中兴通讯股份有限公司 | Dual-mode radio frequency module, dual-mode radio frequency sending, receiving method and user terminal |
| JP2018061280A (en) * | 2012-09-03 | 2018-04-12 | 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． | Apparatus and method for selecting frequency band |
| US10367474B2 (en) | 2012-09-03 | 2019-07-30 | Samsung Electronics Co., Ltd. | Apparatus and method for selecting frequency band |
| US10756705B2 (en) | 2012-09-03 | 2020-08-25 | Samsung Electronics Co., Ltd. | Apparatus and method for selecting frequency band |
| US11258430B2 (en) | 2012-09-03 | 2022-02-22 | Samsung Electronics Co., Ltd. | Apparatus and method for selecting frequency band |
| CN112968710A (en) * | 2019-12-13 | 2021-06-15 | 航天信息股份有限公司 | Multi-band radio frequency circuit |
| CN111262597A (en) * | 2020-01-17 | 2020-06-09 | 深圳市普威技术有限公司 | Novel radio frequency device, radio frequency device control method and wireless equipment |
| CN111934708A (en) * | 2020-08-04 | 2020-11-13 | 西安博瑞集信电子科技有限公司 | Signal processing module applied to radio frequency transceiving link |
| CN113055042A (en) * | 2021-03-09 | 2021-06-29 | 维沃移动通信有限公司 | Radio frequency circuit and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012079309A1 (en) | 2012-06-21 |
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