CN201976071U - Front-end amplifier of wireless communication receiver - Google Patents
Front-end amplifier of wireless communication receiver Download PDFInfo
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- CN201976071U CN201976071U CN2011201105939U CN201120110593U CN201976071U CN 201976071 U CN201976071 U CN 201976071U CN 2011201105939 U CN2011201105939 U CN 2011201105939U CN 201120110593 U CN201120110593 U CN 201120110593U CN 201976071 U CN201976071 U CN 201976071U
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Abstract
The utility model provides a front-end amplifier of a wireless communication receiver, which comprises a front-end input transformer, a first group of common-base amplification circuits, a second group of common-base amplification circuits and a rear-end output transformer. The first secondary output end and the second secondary output end of the front-end input transformer are respectively connected with the first primary input end and the second primary input end of the rear-end output transformer; the input ends of the first group of common-base amplification circuits are connected with the first primary output end of the rear-end output transformer, and the output ends of the first group of common-base amplification circuits are connected with the first secondary input end of the rear-end output transformer; the input ends of the second group of common-base amplification circuits are connected with the second secondary output end of the rear-end output transformer, and the output ends of the second group of common-base amplification circuits are connected with the second secondary input end of the rear-end output transformer; and the first secondary output end of the rear-end output transformer is connected with a direct-current power supply (direct-current bias), and the second secondary output end of the rear-end output transformer is externally connected with a lower-level circuit. The utility model has the advantages that the front-end amplifier of the wireless communication receiver has an ultra-low noise factor, a wide dynamic range and the like.
Description
Technical field
The utility model relates to the analogue amplifier field, particularly is used for the amplifier of radio communication receiving front-end.
Background technology
The low noise amplifier technology, be widely used in the receiving front-end of radio communication, in order to overcome the various weak of wireless communication procedure middle and long distance signal, receiving front-end in radio communication, often need signal is amplified, just can enter into the next stage circuit and handle, because LNA has lower noise and higher gain, make it improve the sensitivity of whole receiving system, strengthened communication efficiency.But along with the continuous fast development of radio communication, the variation of application and electromagnetic environment complicated, traditional low noise amplifier can not satisfy our present requirement, and it might produce fatal influence to whole receiving system.Noise factor is low inadequately, the not high enough of dynamic range will make whole receiver system sensitivity descend; Transmission distortion under the large-signal; Weak signal can't normal transmission under the strong jamming; The intermodulation component of non-linear generation is to the bigger harm of generation of channel.
The utility model content
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art with not enough, provide a kind of rational in infrastructure, simply be used for the amplifier of radio communication receiving front-end, this amplifier has the ultralow and dynamic range advantage of higher of noise factor, on the basis of the volume and weight that does not significantly change traditional amplifier, provide performance index better low noise amplifier, to satisfy the demand of present wireless communication system.
For reaching above-mentioned purpose, the utility model adopts following technical scheme: the amplifier that is used for the radio communication receiving front-end, comprise front end input transformer, middle-end amplifying circuit and rear end output transformer, described middle-end amplifying circuit comprises first group of common-base amplification circuit and second group of common-base amplification circuit; The external external input signal of first primary input terminal source of described front end input transformer, its second primary input terminal ground connection, its first secondary output end connects first primary input terminal of rear end output transformer, and its second subprime output connects second primary input terminal of rear end output transformer; The input of described first group of common-base amplification circuit connects first primary output terminal of rear end output transformer, and its output connects first level input of rear end output transformer; The input of described second group of common-base amplification circuit connects second primary output terminal of rear end output transformer, and its output connects the second subprime input of rear end output transformer; The first secondary output end external direct current power supply (direct current biasing) of described rear end output transformer, its external subordinate of second subprime output circuit.
Described first group of common-base amplification circuit comprises first inductance and several amplifier circuit units in parallel, each amplifier circuit unit includes first electric capacity, first triode, first resistance, first diode, second electric capacity and second resistance, the positive pole of described first electric capacity connects first primary output terminal of rear end output transformer, and its negative pole connects the emitter of first triode; The base stage of first triode connects an end of second resistance, the other end external direct current power supply of second resistance; The collector electrode of first triode connects first level input of rear end output transformer; One end of first resistance connects the emitter of first triode, and the other end connects an end of first inductance, the other end ground connection of first inductance; The positive pole of first diode connects the emitter of first triode, and its negative pole connects the base stage of first triode; The positive pole of described second electric capacity connects the base stage of first triode, its minus earth; The first inductance end that connects of first resistance of each amplifier circuit unit interconnects, and the external direct current power supply end of second resistance of each amplifier circuit unit interconnects; The collector electrode of first triode of each amplifier circuit unit interconnects, and the positive pole of first electric capacity of each amplifier circuit unit interconnects.
Described second group of common-base amplification circuit comprises second inductance and several amplifier circuit units in parallel, each amplifier circuit unit includes the 3rd electric capacity, second triode, the 3rd resistance, second diode, the 4th electric capacity and the 4th resistance, the positive pole of described the 3rd electric capacity connects second primary output terminal of rear end output transformer, and its negative pole connects the emitter of second triode; The base stage of second triode connects an end of the 4th resistance, the other end external direct current power supply of the 4th resistance; The collector electrode of second triode connects the second subprime input of rear end output transformer; One end of the 3rd resistance connects the emitter of second triode, and the other end connects an end of second inductance, the other end ground connection of second inductance; The positive pole of second diode connects the emitter of second triode, and its negative pole connects the base stage of second triode; The positive pole of described the 4th electric capacity connects the base stage of second triode, its minus earth; The second inductance end that connects of the 3rd resistance of each amplifier circuit unit interconnects, and the external direct current power supply end of the 4th resistance of each amplifier circuit unit interconnects; The collector electrode of second triode of each amplifier circuit unit interconnects, and the positive pole of the 3rd electric capacity of each amplifier circuit unit interconnects.
Described first group of common-base amplification circuit, second group of common-base amplification circuit comprise the amplifier circuit unit (number in parallel is decided by actual needs) of a plurality of parallel connections respectively, are preferably the amplifier circuit unit of 2～10 parallel connections.
As a kind of preferred version, described first group of common-base amplification circuit, second group of common-base amplification circuit comprise the amplifier circuit unit of four parallel connections respectively.
Described first triode, second triode are transistor.
Described front end input transformer is non-equilibrium commentaries on classics balancing transformer.
Described rear end output transformer is that balance is changeed balun transformer.
Operation principle of the present utility model: the front end input transformer is converted into the second subprime output output of two-way balanced signal by first secondary output end of front end input transformer, front end input transformer with the non-equilibrium signal of input, and the two-way balanced signal is input to respectively in first group of common-base amplification circuit of two symmetries, second group of common-base amplification circuit through second primary output terminal of first primary output terminal of rear end output transformer, rear end output transformer respectively amplifies.First group of common-base amplification circuit of two symmetries, second group of common-base amplification circuit is formed by connecting by several identical element circuits are parallel, the two-way balanced signal that is input to the middle-end amplifying circuit respectively is divided into four the tunnel, be input to the emitter of first triode (or second triode) of each amplifier circuit unit respectively, export first level input (second subprime input) of rear end output transformer then to through the collector electrode of first triode (or second triode), output signal is synthesized back output on the output transformer of rear end, can regulate output gain by the turn ratio that changes the rear end output transformer, and the impedance matching between realization and the output port, realize the amplification of signal.The common-base amplification circuit of multi-channel parallel improves its dynamic range, and can reduce the power consumption of single tube, the intensifier circuit stability when obtaining ultra-low noise.
This amplifier adopts the symmetrical operation pattern, can its dynamic range of bigger raising, and use this amplifier can realize having the amplifier of ultra-low noise and high dynamic range; Can realize the amplifier of low noise more and high dynamic range; Can also realize than the low noise and the amplifier of high dynamic range more.
Described middle-end amplifying circuit is a multi-channel parallel common base category-A amplifying circuit, adopts the symmetrical operation pattern.
Compared with prior art, the utlity model has following advantage and beneficial effect: amplifier of the present utility model has taken into full account the pluses and minuses of various circuit, compares with existing similar technology, has lower noise factor and higher dynamic range.Noise factor is lower, and is littler to the sensitivity influence of receiving system, can ignore; Higher dynamic range, the equipment that can guarantee is in the undistorted transmission of large-signal; The normal transmission of weak signal under the strong jamming adverse circumstances also can reduce to guarantee proper communication because the intermodulation composition of non-linear generation improves communication quality greatly.
Description of drawings
Fig. 1 is the structured flowchart of the utility model amplifier.
Fig. 2 is the circuit diagram of the utility model amplifier.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Embodiment
As shown in Figure 1, originally be used for the amplifier of radio communication receiving front-end, comprise front end input transformer 13, middle-end amplifying circuit and rear end output transformer 14, described middle-end amplifying circuit comprises first group of common-base amplification circuit and second group of common-base amplification circuit; First primary input terminal, the 1 external external input signal source of described front end input transformer 13, its second primary input terminal, 2 ground connection, its first secondary output end 3 connects first primary input terminal 5 of rear end output transformer 14, and its second subprime output 4 connects second primary input terminal 9 of rear end output transformer 14; The input of described first group of common-base amplification circuit connects first primary output terminal 6 of rear end output transformer 14, and its output connects first level input 7 of rear end output transformer 14; The input of described second group of common-base amplification circuit connects second primary output terminal 10 of rear end output transformer 14, and its output connects the second subprime input 11 of rear end output transformer 14; First secondary output end, 8 external direct current power supplies (the direct current biasing)+12v of described rear end output transformer 14, its second subprime output 12 external subordinate circuit.
As shown in Figure 2, described first group of common-base amplification circuit comprises the amplifier circuit unit of first inductance 17 and four parallel connections, each amplifier circuit unit includes amplifier circuit unit and comprises first electric capacity 15, first triode 20, first resistance 16, first diode 18, second electric capacity 19 and second resistance 21, the negative pole of first primary output terminal, 6, the first electric capacity 15 of the positive pole connection rear end output transformer 14 of first electric capacity 15 connects the emitter of first triode 20; The base stage of first triode 20 is by second resistance, 21 external direct current power supplies+1.9v; The collector electrode of first triode 20 connects first level input 7 of rear end output transformer 14; One end of first resistance 16 connects the emitter of first triode 20, and the other end of first resistance 16 connects 17 times ground of first inductance; The positive pole of first diode 18 connects the emitter of first triode 20; The negative pole of first diode 18 connects the base stage of first triode 20; The positive pole of described second electric capacity 19 connects the base stage of first triode 20, the minus earth of second electric capacity 19; One end of described second resistance 21 connects the base stage of first triode 20, the other end external direct current power supply+1.9v of second resistance 21.The first inductance end that connects of first resistance 16 of each amplifier circuit unit connects mutually, and the dc power supply terminal that connects of second resistance 21 of each amplifier circuit unit connects mutually; The collector electrode of first triode 20 of each amplifier circuit unit interconnects, and the positive pole of first electric capacity 15 of each amplifier circuit unit interconnects.
Described second group of common-base amplification circuit comprises the amplifier circuit unit of second inductance 22 and four parallel connections, as shown in Figure 2, each amplifier circuit unit includes the 3rd electric capacity 24, second triode 27, the 3rd resistance 23, second diode 26, the 4th electric capacity 25 and the 4th resistance 28, the positive pole of the 3rd electric capacity 24 connects second primary output terminal 10 of rear end output transformer 14, the negative pole of the 3rd electric capacity 24 connects the emitter of second triode 27, the base stage of second triode 27 connects DC power supply+1.9v by the 4th resistance 28, and the collector electrode of second triode 27 connects the second subprime input 11 of rear end output transformer 14; One end of the 3rd resistance 23 connects the emitter of second triode 27, and the other end of the 3rd resistance 23 connects 22 times ground of second inductance; The positive pole of second diode 26 connects the emitter of second triode 27, and the negative pole of second diode 26 connects the base stage of second triode 27; The positive pole of described the 4th electric capacity 25 connects the base stage of second triode 27, the minus earth of the 4th electric capacity 25; One end of described the 4th resistance 28 connects the base stage of second triode 27, the other end external direct current power supply+1.9v of the 4th resistance 28; The second inductance end that connects of the 3rd resistance 23 of each amplifier circuit unit interconnects, and the dc power supply terminal that connects of the 4th resistance 28 of each amplifier circuit unit interconnects; The collector electrode of second triode 27 of each amplifier circuit unit interconnects, and the positive pole of the 3rd electric capacity 24 of each amplifier circuit unit interconnects.
Described first triode, second triode are transistor.
Described front end input transformer 13 is non-equilibrium commentaries on classics balancing transformer.
Described rear end output transformer 14 changes balun transformer for balance.
In the present embodiment, the turn ratio of front end input transformer is 4: 4, considers on the shortwave frequency range and uses, and is elite with diplopore magnet ring 2843000202 materials.The non-equilibrium signal of outside input transfers the output of two-way balanced signal to by this transformer, and realizes impedance matching with external input port.Can regulate the gain index by changing this transformer turn ratio.
The middle-end amplifying circuit adopts four tunnel common base category-A amplifying circuits in parallel of symmetry, and the triode in the present embodiment adopts BFP196W.The two-way balanced signal of front end input transformer output respectively is divided into four the tunnel, inputs to the emitter of each triode, exports from collector electrode through triode.The peripheral power supply of triode and resistance provide direct current biasing for transistor.The base capacity of each triode will effectively reduce the noise factor of whole amplifier tube; The electric capacity of emitter plays the effect of stopping direct current.This circuit noise factor of step-down amplifier greatly also improves its dynamic range greatly, reduces the single tube power consumption simultaneously, the stability of boost amplifier.And the symmetrical operation mode that adopts is more favourable to the dynamic range that improves amplifier.
In the present embodiment, the turn ratio of front end input transformer 13 is 4: 4, and the turn ratio of rear end output transformer is 2: 2: 6: 6: 8.Consider and use frequency range, impedance, line capacitance and leakage inductance, use diplopore magnet ring 2861000202 materials.The output after this transformer is synthetic of the two-way balanced signal of middle-end amplifying circuit output, and the impedance matching between realization and the output port can be by the turn ratio resonance-amplifier output gains of this transformer.
When first resistance, when the 3rd resistance is taken as 56 Ω, the parameter of this amplifier is as follows:
| Project | Test index |
| Input, output standing-wave ratio (50 Ω port) | ≤1.12 |
| Gain | +5.6dB |
| Noise factor | ≤1.2dB |
| Output 1dB compression point | ≥28dBm |
| The output second-order intercept point | ≥75.6dBm |
| Export three rank sections | ≥53.6dBm |
The foregoing description is the utility model preferred implementation; but execution mode of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection range of the present utility model.
Claims (7)
1. be used for the amplifier of radio communication receiving front-end, it is characterized in that: comprise front end input transformer, middle-end amplifying circuit and rear end output transformer, described middle-end amplifying circuit comprises first group of common-base amplification circuit and second group of common-base amplification circuit; The external external input signal of first primary input terminal source of described front end input transformer, its second primary input terminal ground connection, its first secondary output end connects first primary input terminal of rear end output transformer, and its second subprime output connects second primary input terminal of rear end output transformer; The input of described first group of common-base amplification circuit connects first primary output terminal of rear end output transformer, and its output connects first level input of rear end output transformer; The input of described second group of common-base amplification circuit connects second primary output terminal of rear end output transformer, and its output connects the second subprime input of rear end output transformer; The first secondary output end external direct current power supply of described rear end output transformer, its external subordinate of second subprime output circuit.
2. the amplifier that is used for the radio communication receiving front-end according to claim 1, it is characterized in that: described first group of common-base amplification circuit comprises first inductance and several amplifier circuit units in parallel, each amplifier circuit unit includes first electric capacity, first triode, first resistance, first diode, second electric capacity and second resistance, the positive pole of described first electric capacity connects first primary output terminal of rear end output transformer, and its negative pole connects the emitter of first triode; The base stage of first triode connects an end of second resistance, the other end external direct current power supply of second resistance; The collector electrode of first triode connects first level input of rear end output transformer; One end of first resistance connects the emitter of first triode, and the other end connects an end of first inductance, the other end ground connection of first inductance; The positive pole of first diode connects the emitter of first triode, and its negative pole connects the base stage of first triode; The positive pole of described second electric capacity connects the base stage of first triode, its minus earth; The first inductance end that connects of first resistance of each amplifier circuit unit interconnects, and the external direct current power supply end of second resistance of each amplifier circuit unit interconnects; The collector electrode of first triode of each amplifier circuit unit interconnects, and the positive pole of first electric capacity of each amplifier circuit unit interconnects.
3. the amplifier that is used for the radio communication receiving front-end according to claim 2, it is characterized in that: described second group of common-base amplification circuit comprises second inductance and several amplifier circuit units in parallel, each amplifier circuit unit includes the 3rd electric capacity, second triode, the 3rd resistance, second diode, the 4th electric capacity and the 4th resistance, the positive pole of described the 3rd electric capacity connects second primary output terminal of rear end output transformer, and its negative pole connects the emitter of second triode; The base stage of second triode connects an end of the 4th resistance, the other end external direct current power supply of the 4th resistance; The collector electrode of second triode connects the second subprime input of rear end output transformer; One end of the 3rd resistance connects the emitter of second triode, and the other end connects an end of second inductance, the other end ground connection of second inductance; The positive pole of second diode connects the emitter of second triode, and its negative pole connects the base stage of second triode; The positive pole of described the 4th electric capacity connects the base stage of second triode, its minus earth; The second inductance end that connects of the 3rd resistance of each amplifier circuit unit interconnects, and the external direct current power supply end of the 4th resistance of each amplifier circuit unit interconnects; The collector electrode of second triode of each amplifier circuit unit interconnects, and the positive pole of the 3rd electric capacity of each amplifier circuit unit interconnects.
4. the amplifier that is used for the radio communication receiving front-end according to claim 3 is characterized in that: described first group of common-base amplification circuit, second group of common-base amplification circuit comprise the amplifier circuit unit of 2～10 parallel connections respectively.
5. the amplifier that is used for the radio communication receiving front-end according to claim 3 is characterized in that: described first triode, second triode are transistor.
6. the amplifier that is used for the radio communication receiving front-end according to claim 3 is characterized in that: described front end input transformer is non-equilibrium commentaries on classics balancing transformer.
7. the amplifier that is used for the radio communication receiving front-end according to claim 3 is characterized in that: described rear end output transformer is that balance is changeed balun transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201105939U CN201976071U (en) | 2011-04-15 | 2011-04-15 | Front-end amplifier of wireless communication receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201105939U CN201976071U (en) | 2011-04-15 | 2011-04-15 | Front-end amplifier of wireless communication receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201976071U true CN201976071U (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201105939U Expired - Lifetime CN201976071U (en) | 2011-04-15 | 2011-04-15 | Front-end amplifier of wireless communication receiver |
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| Country | Link |
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| CN (1) | CN201976071U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258883A (en) * | 2021-06-09 | 2021-08-13 | 四川斯艾普电子科技有限公司 | Device and method for extracting weak signal and suppressing strong interference signal |
| CN113346848A (en) * | 2021-06-18 | 2021-09-03 | 中国电子科技集团公司第二十四研究所 | HBT (heterojunction bipolar transistor) process-based high-three-order intermodulation point medium-power radio-frequency amplification circuit |
-
2011
- 2011-04-15 CN CN2011201105939U patent/CN201976071U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258883A (en) * | 2021-06-09 | 2021-08-13 | 四川斯艾普电子科技有限公司 | Device and method for extracting weak signal and suppressing strong interference signal |
| CN113346848A (en) * | 2021-06-18 | 2021-09-03 | 中国电子科技集团公司第二十四研究所 | HBT (heterojunction bipolar transistor) process-based high-three-order intermodulation point medium-power radio-frequency amplification circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110914 |