CN103378870A - Communication device and radio frequency equalizer - Google Patents
Communication device and radio frequency equalizer Download PDFInfo
- Publication number
- CN103378870A CN103378870A CN2012101264328A CN201210126432A CN103378870A CN 103378870 A CN103378870 A CN 103378870A CN 2012101264328 A CN2012101264328 A CN 2012101264328A CN 201210126432 A CN201210126432 A CN 201210126432A CN 103378870 A CN103378870 A CN 103378870A
- Authority
- CN
- China
- Prior art keywords
- coupled
- resistance
- inductance
- radio frequency
- electric capacity
- 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.)
- Granted
Links
Images
Landscapes
- Transmitters (AREA)
- Transceivers (AREA)
Abstract
A radio frequency equalizer comprises a first resistor, a second resistor, a first capacitor, a first inductor, a first switch, a second switch, a second capacitor, a second inductor and a third switch, wherein the first resistor is coupled to an input end, the second resistor, the first capacitor and the first inductor are coupled between the first resistor and an output end, the first switch is coupled to the input end, the first capacitor and the first inductor, the second switch, the second capacitor and the second inductor are coupled to the output end, the first capacitor and the first inductor, and the third switch is coupled to the first resistor, the second resistor, the second capacitor and the second inductor. The first switch selectively enables the first capacitor or the first inductor to be coupled to the input end according to a control signal. The second switch selectively enables the first capacitor or the first inductor to be coupled to the output end according to the control signal. The third switch selectively enables the second capacitor or the second inductor to be coupled to a connection point of the first resistor and the second resistor according to the control signal.
Description
Technical field
The invention relates to a kind of radio frequency equalizer, particularly about a kind of radio frequency equalizer that compensates the radiofrequency signal power flatness.
Background technology
Because mobile communcations system is in recent years progress, it can provide in the mode that is not subject to the user position various Communications service, for example: voice service, data, services and Video service.General mobile communcations system is multiple access system, meaning can supply simultaneously this system of multidigit user access and dispose suitable wireless network resource to the user, and its employed multiple access technology includes: global system for mobile communications (Global System for Mobile communications, GSM), CDMA access system (Code Division Multiple Access, CDMA), WCDMA access system (Wideband Code Division Multiple Access, WCDMA), and Long Term Evolution (Long Term Evolution, LTE) technology etc.In addition, the reinforcement platemaking technology of advanced Long Term Evolution (LTE Advanced) for going out according to Long Term Evolution (LTE) standard evolution.
In order to make a device for mobile communication can support multiple different mechanics of communication (for example, above-mentioned GSM, CDMA, WCDMA, LTE etc.), multi-modal device for mobile communication design becomes the market mainstream gradually.Because the employed frequency band of each mechanics of communication is not quite similar, therefore multi-modal device for mobile communication must be supported enough wide frequency band range, for example, is extended to the frequency band range of 3 gigahertzs (GHz) by 0.7 gigahertz (GHz).
Yet, because the characteristic of the electronic component in the device for mobile communication, so that under identical input power, device for mobile communication may be not quite similar for the radiofrequency signal power output after treatment of different frequency bands, and cause the uneven phenomenon of power of radiofrequency signal.Fig. 1 a shows the radiofrequency signal power output with respect to a curve of frequency, and this increases the example that successively decreases for the radiofrequency signal power output along with frequency.Fig. 1 b shows the radiofrequency signal power output with respect to another curve of frequency, and this is the example that the radiofrequency signal power output increases progressively along with the frequency increase, and wherein power increment all is one of uneven phenomenons of power output of radiofrequency signal with successively decreasing.
For the uneven phenomenon of the power output that solves radiofrequency signal, the present invention proposes a kind of radio frequency equalizer, but the power output flatness of its effective compensation radiofrequency signal.
Summary of the invention
According to one embodiment of the invention, a kind of communication device comprises radio frequency transceiver, radio frequency equalizer, power amplifier and duplexer.Radio frequency transceiver is in order to produce a plurality of radiofrequency signals according to a plurality of fundamental frequency signals.The radio frequency equalizer is coupled to radio frequency transceiver, in order to received RF signal, and produces a plurality of balanced radiofrequency signals of crossing according to a control signal, and wherein the corresponding frequency response of radio frequency equalizer is responsive control signal and being adjusted.Power amplifier is coupled to the radio frequency equalizer, the radiofrequency signal of crossing in order to receive equilibrium, and amplify the balanced radiofrequency signal of crossing to produce the radiofrequency signal of a plurality of amplifications.Duplexer is coupled to power amplifier, and in order to receiving the radiofrequency signal amplified, and the radiofrequency signal that will amplify is sent to an antenna.
According to another embodiment of the present invention, a kind of radio frequency equalizer, in order to receive a plurality of radiofrequency signals, and produce a plurality of balanced radiofrequency signals of crossing according to a control signal, comprise the first resistance, the second resistance, the first electric capacity, the first inductance, the first switch, second switch, the second electric capacity, the second inductance and the 3rd switch.The first resistance is coupled to an input.The second resistance is coupled between the first resistance and the output.The first switch is coupled to input, the first electric capacity and the first inductance, in order to according to the control signal selectivity the first electric capacity or the first inductance are coupled to input.Second switch is coupled to output, the first electric capacity and the first inductance, in order to according to the control signal selectivity the first electric capacity or the first inductance are coupled to output.The 3rd switch is coupled to the first resistance, the second resistance, the second electric capacity and the second inductance, in order to the second electric capacity or the second inductance are coupled to a tie point of the first resistance and the second resistance according to the control signal selectivity.
Description of drawings
Fig. 1 a shows that the radiofrequency signal power output is with respect to a curve of frequency.
Fig. 1 b shows that the radiofrequency signal power output is with respect to another curve of frequency.
Fig. 2 shows according to the described communication device calcspar of one embodiment of the invention.
Fig. 3 shows described according to another embodiment of the present invention communication device calcspar.
Fig. 4 shows according to the described radio frequency equalizer of one embodiment of the invention figure.
Fig. 5 a shows according to the equivalent circuit diagram of the described radio frequency equalizer of one embodiment of the invention when control signal has the first state.
Fig. 5 b shows according to the described radio frequency equalizer frequency response of one embodiment of the invention curve.
Fig. 6 a shows according to the equivalent circuit diagram of the described radio frequency equalizer of one embodiment of the invention when control signal has the second state.
Fig. 6 b shows described according to another embodiment of the present invention radio frequency equalizer frequency response curve.
Fig. 7 shows according to the power of the radiofrequency signal of the described amplification via being exported by power amplifier after the compensation of radio frequency equalizer of one embodiment of the invention curve with respect to frequency.
[main element label declaration]
200,300～communication device; 210,310～fundamental frequency signal processing unit;
220,320～radio frequency transceiver; 230,430,530,630～radio frequency equalizer;
240～power amplifier; 250～directional coupler;
260～duplexer; 270～antenna;
280,380～power detector; 290～load;
501,502,601,602～curve; C1, C2～electric capacity;
Ctrl～control signal; IN～input;
L1, L2～inductance; N1～tie point;
OUT～output; R1, R2～resistance;
RX～receiving port; S1, S2, S3～switch;
TX～delivery port.
Embodiment
For manufacturing of the present invention, method of operation, target and advantage can be become apparent, several preferred embodiments cited below particularly, and cooperate appended graphicly, be described in detail below:
Embodiment:
Fig. 2 shows according to the described communication device calcspar of one embodiment of the invention.Communication device 200 can comprise fundamental frequency signal processing unit 210, radio frequency transceiver 220, radio frequency equalizer 230, power amplifier 240, directional coupler 250, duplexer 260 and antenna 270 at least.Fundamental frequency signal processing unit 210 is in order to process and to produce fundamental frequency signal.Fundamental frequency signal processing unit 210 can comprise that a plurality of hardware units are to carry out the fundamental frequency signal processing, comprise analog digital conversion (analog to digital conversion, ADC)/digital-to-analogue conversion (digital to analog conversion, DAC), gain (gain) adjustment, modulation and demodulation and coding/decoding etc.Fundamental frequency signal processing unit 210 can also comprise transmitting a delivery port TX of up link (uplink) signal, and in order to a receiving port RX of receiving downlink (downlink) signal.
Radio frequency transceiver 220 is in order to process radiofrequency signal, but the radiofrequency signal of its receiving downlink, and radiofrequency signal is converted to fundamental frequency signal further processes to transfer to fundamental frequency signal processing unit 210, or from the fundamental frequency signal of fundamental frequency signal processing unit 210 receiving uplinks, and fundamental frequency signal is converted to radiofrequency signal to transmit.Radio frequency transceiver 220 also can comprise that a plurality of hardware units are to carry out above-mentioned radio frequency conversion, for instance, radio frequency transceiver 220 can comprise a frequency mixer (mixer), in order to fundamental frequency signal is multiplied by a carrier wave that vibrates in the employed tranmitting frequency of mobile communcations system, wherein tranmitting frequency can be employed 900 megahertzes of GSM, 1800 megahertzes or 1900 megahertzes, or employed 900 megahertzes of UMTS, 1900 megahertzes or 2100 megahertzes, or employed 900 megahertzes of LTE, 2100 megahertzes or 2600 megahertzes, or decide on the standard of other radio access technology.
Duplexer 260 is coupled to power amplifier 240 by directional coupler 250, and in order to receiving the radiofrequency signal amplified, and the radiofrequency signal that will amplify is sent to antenna 270.The radiofrequency signal of amplifying is sent in the air by antenna at last.In the signal of down link was processed, duplexer 260 was from antenna 270 receiving downlink radiofrequency signals, and the signal that receives was sent to the receiving port RX of radio frequency transceiver 220.
According to one embodiment of the invention, power detector 280 is in order to detecting the power of the radiofrequency signal amplified, and according to the power generation control signal Ctrl of the radiofrequency signal of amplifying.But it should be noted that power detector 280 implementations be one independently the device, perhaps be integrated in as shown in Figure 2 in the radio frequency transceiver 220, the present invention is not limited to any execution mode.In addition, in power detector 280 is integrated in radio frequency transceiver 220, power detector 280 can be equally one independently the device or can be implemented by the element (for example, a processor) of radio frequency transceiver 220 inside, the present invention is not limited to any execution mode.
According to another embodiment of the present invention, power detector also can be integrated in the fundamental frequency signal processing unit.Fig. 3 shows described according to another embodiment of the present invention communication device calcspar.Communication device 300 can comprise fundamental frequency signal processing unit 310, radio frequency transceiver 320, radio frequency equalizer 230, power amplifier 240, directional coupler 250, duplexer 260 and antenna 270 at least.The introduction of fundamental frequency signal processing unit 310, radio frequency transceiver 320, radio frequency equalizer 230, power amplifier 240, directional coupler 250, duplexer 260 and antenna 270 can be with reference to the related description of Fig. 2, and repeats no more in this.
In this embodiment, power detector 380 is integrated in the fundamental frequency signal processing unit 310.Power detector 380 can be equally one independently the device or can be implemented by the element (for example, a processor) of fundamental frequency signal processing unit 310 inside, the present invention is not limited to any execution mode.It should be noted that, in this embodiment, the radiofrequency signal that a part of being fed back by directional coupler 250 was amplified can directly be sent to power detector 380 rate of doing works and detect, or do the frequency reducing conversion via radio frequency transceiver 320 first, be resent to power detector 380 rate of doing works and detect, and the present invention is not limited to any execution mode.
According to one embodiment of the invention, power detector 280/380 is mainly in order to the power that detects the radiofrequency signal of the amplifying flatness with respect to a curve of frequency.For example, power detector 280/380 (for example can record different frequency bands, the employed different transmission bands of different communication technologies or the employed different transmission bands of same mechanics of communication or other) the watt level of radiofrequency signal after amplifying via power amplifier 240, with the power of the radiofrequency signal that obtains the amplifying curve (for example, the curve shown in Fig. 1 a and the 1b figure) with respect to frequency.After obtaining the curve of power with respect to frequency, power detector 280/380 can be further judges according to this curve whether increasing or decreasing is adjusted the frequency response of radio frequency equalizer 230 with the control signal Ctrl that produces correspondence along with the frequency increase for the power of the radiofrequency signal of amplifying.
Fig. 4 shows according to the described radio frequency equalizer of one embodiment of the invention figure.Radio frequency equalizer 430 can comprise resistance R 1 and R2, capacitor C 1 and C2, inductance L 1 and L2 and switch S 1, S2 and S3.Resistance R 1 and R2 coupled in series are between the input IN and output OUT of radio frequency equalizer 430.Switch S 1 is coupled between input IN, capacitor C 1 and the inductance L 1 of radio frequency equalizer 430, in order to according to control signal Ctrl selectivity the one of capacitor C 1 or inductance L 1 is coupled to input IN.Switch S 2 is coupled between output OUT, capacitor C 1 and the inductance L 1 of radio frequency equalizer 430, in order to according to control signal Ctrl selectivity the one of capacitor C 1 or inductance L 1 is coupled to output OUT.Therefore, the different conditions of responsive control signal Ctrl, the one of capacitor C 1 and inductance L 1 will and resistance R 1 and R2 coupled in parallel between input IN and output OUT.Similarly, switch S 3 is coupled between resistance R 1 and R2, capacitor C 2 and the inductance L 2, in order to capacitor C 2 or inductance L 2 are coupled to the tie point N1 of resistance R 1 and R2 according to control signal Ctrl selectivity.
According to one embodiment of the invention, when power detector 280/380 judges that the power of the radiofrequency signal of amplifying successively decreases along with the frequency increase (for example, shown in the curve of Fig. 1 a), can produce and (for example have the first state, one logic-high state or a logic low state) control signal Ctrl, in order to the handover operation of control switch S1, S2 and S3, so obtain the equivalent circuit diagram of the radio frequency equalizer shown in Fig. 5 a-.
Shown in Fig. 5 a, when control signal Ctrl had the first state, the equivalent electric circuit of radio frequency equalizer 530 comprised resistance R 1 and R2, capacitor C 1 and inductance L 2.Capacitor C 1 and resistance R 1 and R2 coupled in parallel are between input IN and output OUT, and inductance L 2 is coupled between the tie point N1 and an end points (for example a, earth point) of resistance R 1 and R2.It should be noted that this moment, inductance L 1 was electrically insulated with input IN and output OUT, and capacitor C 2 is electrically insulated with resistance R 1 and R2.
Fig. 5 b shows according to the described radio frequency equalizer frequency response of one embodiment of the invention curve.Frequency response curve shown in Fig. 5 b is the corresponding frequency response curve of equivalent electric circuit of the radio frequency equalizer shown in Fig. 5 a.As shown in the figure, the corresponding frequency response of the equivalent electric circuit of radio frequency equalizer 530 is insertion loss along with the frequency of radiofrequency signal increases a curve that reduces, therefore, the power that detects the radiofrequency signal of amplifying when power detector 280/380 increases along with frequency and when reducing, control signal Ctrl can be set as and have the first state, in order to the uneven phenomenon of power output by radio frequency equalizer 230 compensation radiofrequency signals.
It should be noted that the capacitance of capacitor C 1 and the inductance value of inductance L 2 can adjust along with the slope size of required frequency response, to reach best compensation effect.According to one embodiment of the invention, when the inductance value of the capacitance of capacitor C 1 and inductance L 2 more hour, a slope of the corresponding frequency response of radio frequency equalizer is larger.For example, shown in Fig. 5 b, the capacitance of frequency response curve 502 corresponding capacitor C 1 and the inductance value of inductance L 2 are less than the capacitance of frequency response curve 501 corresponding capacitor C 1 and the inductance value of inductance L 2.
According to another embodiment of the present invention, when power detector 280/380 judges that the power of the radiofrequency signal of amplifying increases progressively along with the frequency increase (for example, shown in the curve of Fig. 1 b), can produce and (for example have the second state, one logic low state or a logic-high state) control signal Ctrl, in order to the handover operation of control switch S1, S2 and S3, so obtain the equivalent circuit diagram of the radio frequency equalizer shown in Fig. 6 a-.
Shown in Fig. 6 a, when control signal Ctrl had the second state, the equivalent electric circuit of radio frequency equalizer 630 comprised resistance R 1 and R2, capacitor C 2 and inductance L 1.Inductance L 1 and resistance R 1 and R2 coupled in parallel are between input IN and output OUT, and capacitor C 2 is coupled between the tie point N1 and an end points (for example a, earth point) of resistance R 1 and R2.It should be noted that this moment, capacitor C 1 was electrically insulated with input IN and output OUT, and inductance L 2 is electrically insulated with resistance R 1 and R2.
Fig. 6 b shows described according to another embodiment of the present invention radio frequency equalizer frequency response curve.Frequency response curve shown in Fig. 6 b is the corresponding frequency response of equivalent electric circuit of the radio frequency equalizer shown in Fig. 6 a.As shown in the figure, the corresponding frequency response of the equivalent electric circuit of radio frequency equalizer 630 is insertion loss along with the curve that the frequency of radiofrequency signal increases, therefore, the power that detects the radiofrequency signal of amplifying when power detector 280/380 increases along with frequency and when increasing progressively, control signal Ctrl can be set as and have the second state, in order to the uneven phenomenon of power output by radio frequency equalizer 230 compensation radiofrequency signals.
It should be noted that the capacitance of capacitor C 2 and the inductance value of inductance L 1 can adjust along with the slope size of required frequency response, to reach best compensation effect.According to one embodiment of the invention, when the inductance value of the capacitance of capacitor C 2 and inductance L 1 was larger, a slope of the corresponding frequency response of radio frequency equalizer was larger.For example, shown in Fig. 6 b, the capacitance of frequency response curve 602 corresponding capacitor C 2 and the inductance value of inductance L 1 are greater than the capacitance of frequency response curve 601 corresponding capacitor C 2 and the inductance value of inductance L 1.
Fig. 7 shows according to one embodiment of the invention describedly via after the compensation of radio frequency equalizer, and the power of the radiofrequency signal of the amplification of being exported by power amplifier is with respect to a curve of frequency.As shown in the figure, compared to Fig. 1 a and Fig. 1 b, in embodiments of the invention, adjust the corresponding frequency response of radio frequency equalizer by control signal Ctrl, so that the power of the radiofrequency signal of amplifying can effectively be increased with respect to the flatness of the curve of frequency, therefore solved the uneven phenomenon of power output of radiofrequency signal.
Do not hint the order of the step that precedence between any priority, order of priority, each element or method are performed in the claim in order to the use of the ordinal numbers such as " first ", " second " of modified elements, " the 3rd " itself, and only with making a check mark to distinguish the have same names different elements of (having different ordinal numbers).
Though the present invention discloses as above with preferred embodiment; so it is not to limit scope of the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the claim scope person of defining.
Claims (15)
1. communication device comprises:
One radio frequency transceiver is in order to produce a plurality of radiofrequency signals according to a plurality of fundamental frequency signals;
One radio frequency equalizer is coupled to this radio frequency transceiver, in order to these a plurality of radiofrequency signals of reception, and according to a plurality of balanced radiofrequency signals of crossing of control signal generation;
One power amplifier is coupled to this radio frequency equalizer, the radiofrequency signals of crossing in order to receive this a plurality of equilibriums, and amplify these a plurality of balanced radiofrequency signals of crossing to produce the radiofrequency signal of a plurality of amplifications; And
One duplexer is coupled to this power amplifier, and in order to receiving the radiofrequency signal of these a plurality of amplifications, and radiofrequency signal that will these a plurality of amplifications is sent to an antenna,
Wherein the corresponding frequency response of this radio frequency equalizer is response this control signal and being adjusted.
2. communication device according to claim 1 also comprises:
One power detector in order to the power of the radiofrequency signal that detects these a plurality of amplifications, and produces this control signal according to the power of the radiofrequency signal of these a plurality of amplifications; And
One directional coupler is coupled between this power amplifier and this duplexer, in order to the radio frequency signal feedback of this a plurality of amplifications of a part to this power detector.
3. communication device according to claim 2, wherein this power detector is contained in this radio frequency transceiver.
4. communication device according to claim 2 also comprises:
One fundamental frequency signal processing unit, in order to process and to produce these a plurality of fundamental frequency signals, wherein this power detector is contained in this fundamental frequency signal processing unit.
5. communication device according to claim 1, wherein this radio frequency equalizer comprises:
One first resistance is coupled to an input;
One second resistance is coupled between this first resistance and the output;
One first electric capacity;
One first inductance;
One first switch is coupled to this input, this first electric capacity and this first inductance, in order to according to this control signal selectivity this first electric capacity or this first inductance are coupled to this input;
One second switch is coupled to this output, this first electric capacity and this first inductance, in order to according to this control signal selectivity this first electric capacity or this first inductance are coupled to this output;
One second electric capacity;
One second inductance; And
One the 3rd switch is coupled to this first resistance, this second resistance, this second electric capacity and this second inductance, in order to this second electric capacity or this second inductance are coupled to a tie point of this first resistance and this second resistance according to this control signal selectivity.
6. communication device according to claim 5 is wherein got over hour when a capacitance of this first electric capacity and an inductance value of this second inductance, and a slope of corresponding this frequency response of this radio frequency equalizer is larger.
7. communication device according to claim 5, wherein when a capacitance of an inductance value of this first inductance and this second electric capacity was larger, a slope of corresponding this frequency response of this radio frequency equalizer was larger.
8. communication device according to claim 2, the power that wherein detects the radiofrequency signal of these a plurality of amplifications when this power detector increase along with the frequency of the radiofrequency signal of these a plurality of amplifications and when reducing, this radio frequency equalizer has an equivalent circuit and comprises:
One first resistance is coupled to an input;
One second resistance is coupled between this first resistance and the output;
One electric capacity is coupled between this input and this output; And
One inductance is coupled between the tie point and an end points of this first resistance and this second resistance.
9. communication device according to claim 2, the power that wherein detects the radiofrequency signal of these a plurality of amplifications when this power detector increase along with the frequency of the radiofrequency signal of these a plurality of amplifications and when increasing, this radio frequency equalizer has an equivalent circuit and comprises:
One first resistance is coupled to an input;
One second resistance is coupled between this first resistance and the output;
One inductance is coupled between this input and this output; And
One electric capacity is coupled between the tie point and an end points of this first resistance and this second resistance.
10. communication device according to claim 2, wherein this power detector produces this control signal adjusting corresponding this frequency response of this radio frequency equalizer, in order to the power of the radiofrequency signal that increases these a plurality of amplifications flatness with respect to a curve of the frequency of the radiofrequency signal of these a plurality of amplifications.
11. a radio frequency equalizer in order to receiving a plurality of radiofrequency signals, and produces a plurality of balanced radiofrequency signals of crossing according to a control signal, comprising:
One first resistance is coupled to an input;
One second resistance is coupled between this first resistance and the output;
One first electric capacity;
One first inductance;
One first switch is coupled to this input, this first electric capacity and this first inductance, in order to according to this control signal selectivity this first electric capacity or this first inductance are coupled to this input;
One second switch is coupled to this output, this first electric capacity and this first inductance, in order to according to this control signal selectivity this first electric capacity or this first inductance are coupled to this output;
One second electric capacity;
One second inductance; And
One the 3rd switch is coupled to this first resistance, this second resistance, this second electric capacity and this second inductance, in order to this second electric capacity or this second inductance are coupled to a tie point of this first resistance and this second resistance according to this control signal selectivity.
12. radio frequency equalizer according to claim 11, wherein when this control signal has first state, this first electric capacity is coupled between this input and this output, this first inductance and this input and this output are electrically insulated, this second inductance is coupled between the tie point and an end points of this first resistance and this second resistance, and this second electric capacity and this first resistance and this second resistance are electrically insulated.
13. radio frequency equalizer according to claim 11, wherein when this control signal has second state, this first inductance is coupled between this input and this output, this first electric capacity and this input and this output are electrically insulated, this second electric capacity is coupled between the tie point and an end points of this first resistance and this second resistance, and this second inductance and this first resistance and this second resistance are electrically insulated.
14. radio frequency equalizer according to claim 11 is wherein got over hour when a capacitance of this first electric capacity and an inductance value of this second inductance, a slope of the corresponding frequency response of this radio frequency equalizer is larger.
15. radio frequency equalizer according to claim 11, wherein when a capacitance of an inductance value of this first inductance and this second electric capacity was larger, a slope of the corresponding frequency response of this radio frequency equalizer was larger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210126432.8A CN103378870B (en) | 2012-04-26 | 2012-04-26 | Communication device and radio frequency equalizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210126432.8A CN103378870B (en) | 2012-04-26 | 2012-04-26 | Communication device and radio frequency equalizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103378870A true CN103378870A (en) | 2013-10-30 |
| CN103378870B CN103378870B (en) | 2015-08-05 |
Family
ID=49463480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210126432.8A Active CN103378870B (en) | 2012-04-26 | 2012-04-26 | Communication device and radio frequency equalizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103378870B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016177161A1 (en) * | 2015-07-10 | 2016-11-10 | 中兴通讯股份有限公司 | Downlink carrier flatness compensation method and device |
| WO2021227274A1 (en) * | 2020-05-11 | 2021-11-18 | 锐石创芯（深圳）科技有限公司 | Capacitor switching chip and radio-frequency power amplification circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1656766A (en) * | 2002-07-15 | 2005-08-17 | 诺基亚公司 | Self-adaptive pre-equalizing method and apparatus |
| WO2006013753A1 (en) * | 2004-08-06 | 2006-02-09 | Murata Manufacturing Co., Ltd. | High frequency composite component |
| CN101374285A (en) * | 2008-10-15 | 2009-02-25 | 耿直 | Common transmit-receive transmission system and method for base station |
| EP2337289A1 (en) * | 2009-12-18 | 2011-06-22 | Nxp B.V. | RF receiver |
| CN102427390A (en) * | 2011-11-15 | 2012-04-25 | 福建星海通信科技有限公司 | Internal and external communication equipment of closed metal cabin, system and method |
-
2012
- 2012-04-26 CN CN201210126432.8A patent/CN103378870B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1656766A (en) * | 2002-07-15 | 2005-08-17 | 诺基亚公司 | Self-adaptive pre-equalizing method and apparatus |
| WO2006013753A1 (en) * | 2004-08-06 | 2006-02-09 | Murata Manufacturing Co., Ltd. | High frequency composite component |
| CN101374285A (en) * | 2008-10-15 | 2009-02-25 | 耿直 | Common transmit-receive transmission system and method for base station |
| EP2337289A1 (en) * | 2009-12-18 | 2011-06-22 | Nxp B.V. | RF receiver |
| CN102427390A (en) * | 2011-11-15 | 2012-04-25 | 福建星海通信科技有限公司 | Internal and external communication equipment of closed metal cabin, system and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016177161A1 (en) * | 2015-07-10 | 2016-11-10 | 中兴通讯股份有限公司 | Downlink carrier flatness compensation method and device |
| WO2021227274A1 (en) * | 2020-05-11 | 2021-11-18 | 锐石创芯（深圳）科技有限公司 | Capacitor switching chip and radio-frequency power amplification circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103378870B (en) | 2015-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109525257B (en) | Transmitter apparatus and transceiver apparatus | |
| CN102694566B (en) | For the system and method for the antenna in tuning Wireless Telecom Equipment | |
| JP5059944B2 (en) | Dual band radio frequency transmitter | |
| US10587296B2 (en) | Adjustable gain devices and methods for use therewith | |
| EP2667515B1 (en) | Electronic devices, methods, and computer program products for making a change to an antenna element based on a power level of a transmission power amplifier | |
| EP3105859B1 (en) | Mode-based antenna tuning | |
| CN102833884A (en) | Dual-mode mobile communication terminal | |
| CN102457240A (en) | Gain control in a shared RF front-end path for different standards that use the same frequency band | |
| US9014245B2 (en) | Method and apparatus for compensating for phase shift in a communication device | |
| CN103378870B (en) | Communication device and radio frequency equalizer | |
| TWI462537B (en) | Communication apparatus and radio frequency equalizer | |
| US12136939B2 (en) | Receiver with distributed attenuators | |
| CN110661543B (en) | Mobile phone device, radio frequency transceiver circuit and impedance adjusting device | |
| US11165165B2 (en) | Antenna system, base station, and communications system | |
| EP4304084A1 (en) | Load modulated radio-frequency amplifier with digital predistortion | |
| US12149382B2 (en) | Wireless circuitry with narrowband error vector magnitude (EVM) estimator | |
| EP4401307A1 (en) | Methods and techniques to achieve target phase shift over wide frequency band in the input of doherty power amplifiers | |
| EP4148994A1 (en) | Amplifier circuitry with gain adjustments and input matching | |
| US20240146338A1 (en) | Load Modulated Radio-frequency Amplifier with Extended Tuning Range | |
| CN117375537A (en) | Load modulated radio frequency amplifier with digital predistortion | |
| CN117081619A (en) | High pass power combiner with coupled inductive elements | |
| CN118353381A (en) | Method and technique for achieving target phase shift over a wide frequency band in an input of a doherty power amplifier | |
| CN116979907A (en) | Radio frequency amplifier with load response estimation | |
| CN203466809U (en) | Mobile-phone transmitting and receiving circuit | |
| CN104796097A (en) | Concurrent transmission and reception |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |