CN105811894A - Equalizing network for broadband radio frequency amplifier, broadband radio frequency amplifier and adjusting method - Google Patents
Equalizing network for broadband radio frequency amplifier, broadband radio frequency amplifier and adjusting method Download PDFInfo
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- CN105811894A CN105811894A CN201610107314.0A CN201610107314A CN105811894A CN 105811894 A CN105811894 A CN 105811894A CN 201610107314 A CN201610107314 A CN 201610107314A CN 105811894 A CN105811894 A CN 105811894A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/42—Modifications of amplifiers to extend the bandwidth
- H03F1/48—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
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Abstract
The invention discloses an equalizing network for a broadband radio frequency amplifier, the broadband radio frequency amplifier and an adjusting method. The equalizing network for the broadband radio frequency amplifier mainly comprises a series LC resonant network, a T-shaped resistance attenuation network and a parallel LC resonant network. The equalizing network is applied to the broadband radio frequency amplifier, radio frequency signals are input from the radio-frequency input end of the equalizing network, high-frequency resonant signals are output from the radio-frequency output end of the equalizing network through a series LC resonant network branch circuit, low-frequency signals outside resonant frequency points are attenuated through the T-shaped resistance attenuation network, a parallel LC resonant network branch circuit is put at the grounding branch circuit end in the T-shaped resistance attenuation network, and attenuation of the high-frequency resonant signals is inhibited. According to the equalizing network, due to the resonant frequency-selecting characteristic of series LC and parallel LC, changing of the amplitude of different-frequency signals is caused, amplitude equalizing control is achieved, and the design of the broadband radio frequency amplifier is achieved in cooperation with an amplifier tube core.
Description
Technical field
The invention mainly relates to the equalising network of a kind of wideband radio frequency amplifier, it is adaptable to the application of wideband radio frequency amplifier.
Background technology
Radiofrequency signal in the process of transmission it is possible that amplitude distortion and phase-shift distortion.In order to ensure the quality of transmission, distortion size should be restricted.It is corrected typically by equalising network.The network being generally used to correction amplitude distortion is called gainequalizer (also referred to as power equalizer, attenuation equalizer or amplitude equalizer), and the network being used for correcting phase-shift distortion is called phase shift equalizer.
The frequency response of the gain of usual broadband amplifier tube core is decline trend, it is therefore necessary to improve its frequency response, promotes its gain flatness.
Gainequalizer and broadband amplifier tube core integrated supports the use that there is not been reported.Both support the use the complexity that can reduce system module design, and can promote bandwidth and the gain performance index of wideband radio frequency amplifier.
Summary of the invention
In order to realize wideband gain flatness coincidence amplifier, the present invention proposes the equalising network of a kind of wideband radio frequency amplifier and wideband radio frequency amplifier and control method.
A kind of equalising network of wideband radio frequency amplifier, this equalising network includes series LC resonant network, T-shaped resistance decrement network and parallel LC resonance network, between the rf inputs mouth RF_IN and the radio frequency output port RF_OUT that are connected to equalising network of described series LC resonant network；Described T-shaped resistance decrement network is connected between RF input port RF_IN and the radio frequency output port RF_OUT of equalising network, and resistance decrement branch of a network end is connected with parallel LC resonance network input port；Described parallel LC resonance network is connected between T-shaped resistance decrement branch of a network and ground；
Described series LC resonant network includes inductance and the electric capacity of series LC resonant network；Wherein inductance one end of series LC resonant network connects the rf inputs mouth RF_IN of described equalising network, and the other end connects the electric capacity of series LC resonant network；Wherein electric capacity one end of series LC resonant network connects the inductance of series LC resonant network, and the other end connects the radio frequency output port RF_OUT of described equalising network；
Described T-shaped resistance decrement network includes the first resistance, the second resistance and the 3rd resistance；Wherein first resistance one end connects the rf inputs mouth RF_IN of described equalising network, and the other end is connected between the second resistance and the 3rd resistance；Wherein second resistance one end connects the radio frequency output port RF_OUT of described equalising network, and the other end is connected between the first resistance and the 3rd resistance；Wherein the 3rd resistance one end connects the parallel LC resonance network input port of described equalising network, and the other end is connected between the first resistance and the second resistance；
Described parallel LC resonance network includes the inductance of parallel LC resonance network and the electric capacity of parallel LC resonance network；Wherein inductance one end of parallel LC resonance network connects the T-shaped resistance decrement branch of a network port of described equalising network, and the other end connects ground；Wherein electric capacity one end of parallel LC resonance network connects the T-shaped resistance decrement branch of a network port of described equalising network, and the other end connects ground.
The amplitude fading amount of described equalising network is by the first resistance of T-shaped resistance decrement network, and the resistance adjustment of the second resistance and the 3rd resistance controls.
The selecting frequency characteristic of described equalising network is controlled by the parameter adjustment of the inductance of series LC resonant network and the inductance of electric capacity and parallel LC resonance network and electric capacity.
When described equalising network is applied to X-band, the inductance of series LC resonant network adopts series connection microstrip line, series connection microstrip line includes input series connection microstrip line, output series connection microstrip line, and described input series connection microstrip line, output series connection microstrip line lay respectively at the two ends of the electric capacity of series LC resonant network；Described parallel LC resonance network adopts quarter-wave short circuit minor matters microstrip line to replace the inductance of parallel LC resonance network and the electric capacity of parallel LC resonance network.
A kind of wideband radio frequency amplifier adopting described equalising network.
The amplitude fading amount of described equalising network is by the first resistance of T-shaped resistance decrement network, and the resistance adjustment of the second resistance and the 3rd resistance controls；The selecting frequency characteristic of described equalising network is controlled by the parameter adjustment of the inductance of series LC resonant network and the inductance of electric capacity and parallel LC resonance network and electric capacity, described equalising network series LC resonant network resonance is at front end frequency, parallel LC resonance network also resonance is at this frequency simultaneously, thus the decay of front end signal reduces as far as possible, other band signals are then decayed by T-shaped attenuation network, namely along with the increase of frequency, the equalising network of the positive slope that attenuation reduces, and the gain frequency of amplifier is rung and is changed for negative slope, thus realizing the consistent change of wideband gain flatness.
The beneficial effects of the present invention is: the first, the amplitude fading amount of described equalising network is by the first resistance of T-shaped resistance decrement network, and the resistance adjustment of the second resistance and the 3rd resistance controls.The second, the selecting frequency characteristic of described equalising network is controlled by the inductance of series LC resonant network and the parameter adjustment of electric capacity and parallel LC resonance net inductive and electric capacity.3rd, described equalising network effectively improves the frequency response of transmission band while can ensureing better input and output standing wave in broadband range, it is achieved the equalising network that broadband flatness is consistent.
Accompanying drawing explanation
Fig. 1 is the structural representation of the equalising network of a kind of wideband radio frequency amplifier；
Fig. 2 is the structural representation of the equalising network embodiment of a kind of X-band wideband radio frequency amplifier；
Fig. 3 is the equalising network embodiment S parameter S21 test result figure of X-band wideband radio frequency amplifier；
Fig. 4 is the equalising network embodiment S parameter S11 test result figure of X-band wideband radio frequency amplifier；
Fig. 5 is the equalising network embodiment S parameter S22 test result figure of X-band wideband radio frequency amplifier；
Description of reference numerals: 1, the inductance of series LC resonant network；2, the electric capacity of series LC resonant network；3, the first resistance of T-shaped resistance decrement network；4, the second resistance of T-shaped resistance decrement network；5, the 3rd resistance of T-shaped resistance decrement network；6, the inductance of parallel LC resonance network；7, the electric capacity of parallel LC resonance network；8, input series connection microstrip line；9, output series connection microstrip line；10, quarter-wave short circuit minor matters microstrip line.
Specific embodiments
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As it is shown in figure 1, the equalising network of a kind of wideband radio frequency amplifier, it includes series LC resonant network, T-shaped resistance decrement network and parallel LC resonance network.Described equalising network includes inductance 1 and the electric capacity 2 of series resonant network；T-shaped resistance decrement network the first resistance 3, the second resistance 4 and the 3rd resistance 5；The inductance 6 of parallel LC resonance network and electric capacity 7.
Between the rf inputs mouth RF_IN and the radio frequency output port RF_OUT that are connected to equalising network of described series LC resonant network；Described T-shaped resistance decrement network is connected between RF input port RF_IN and the radio frequency output port RF_OUT of equalising network, and resistance decrement branch of a network end is connected with parallel LC resonance network input port；Described parallel LC resonance network is connected between T-shaped resistance decrement branch of a network and ground.
Described series LC resonant network includes inductance 1 and electric capacity 2；Wherein inductance 1 one end connects the rf inputs mouth RF_IN of described equalising network, and the other end connects electric capacity 2；Wherein electric capacity 2 one end connects inductance 1, and the other end connects the radio frequency output port RF_OUT of described equalising network.
Described T-shaped resistance decrement network includes the first resistance 3, the second resistance 4 and the 3rd resistance 5；Wherein first resistance 3 one end connects the rf inputs mouth RF_IN of described equalising network, and the other end is connected between the second resistance 4 and the 3rd resistance 5；Wherein second resistance 4 one end connects the radio frequency output port RF_OUT of described equalising network, and the other end is connected between the first resistance 3 and the 3rd resistance 5；Wherein the 3rd resistance 5 one end connects the parallel LC resonance network input port of described equalising network, and the other end is connected between the first resistance 3 and the second resistance 4.
Described parallel LC resonance network includes inductance 6 and electric capacity 7；Wherein inductance 6 one end connects the T-shaped resistance decrement branch of a network port of described equalising network, and the other end connects ground；Wherein electric capacity 2 one end connects the T-shaped resistance decrement branch of a network port of described equalising network, and the other end connects ground；
The amplitude fading amount of described equalising network is by the first resistance 3 of T-shaped resistance decrement network, and the resistance adjustment of the second resistance 4 and the 3rd resistance 5 controls.
The selecting frequency characteristic of described equalising network is controlled with the inductance 6 of parallel LC resonance network and the parameter adjustment of electric capacity 7 by inductance 1 and the electric capacity 2 of series LC resonant network.
Fig. 2 is the equalising network structure chart of the X-band wideband radio frequency amplifier of the present embodiment, and in the application of X-band, the ghost effect of passive lumped device inductance is obvious, so adopting the mode of microstrip line to realize series connection and series resonant network.In this embodiment, it includes series resonant network, T-shaped resistance decrement network and series resonant network.The equalising network of described embodiment includes series resonant network input series connection microstrip line 8, electric capacity 2 and output series connection microstrip line 9；T-shaped resistance decrement network the first resistance 3, the second resistance 4 and the 3rd resistance 5；Series resonant network quarter-wave short circuit minor matters microstrip line 10.
Between the rf inputs mouth RF_IN and the radio frequency output port RF_OUT that are connected to equalising network of described embodiment series resonant network；The T-shaped resistance decrement network of described embodiment is connected between RF input port RF_IN and the radio frequency output port RF_OUT of equalising network, and resistance decrement branch of a network end is connected with series resonant network input port；Described embodiment series resonant network is connected between T-shaped resistance decrement branch of a network and ground.
Described embodiment series resonant network includes input series connection microstrip line 8, electric capacity 2 and output series connection microstrip line 9；Wherein input series connection microstrip line 8 one end connects the rf inputs mouth RF_IN of described embodiment equalising network, and the other end connects electric capacity 2；Wherein electric capacity 2 one end connects input series connection microstrip line 8, and the other end connects output series connection microstrip line 9；Wherein output series connection microstrip line 9 one end connects electric capacity 2, and the other end connects the radio frequency output port RF_OUT of described embodiment equalising network.
Described embodiment series resonant network includes quarter-wave short circuit minor matters microstrip line 10；Wherein short circuit minor matters microstrip line 10 one end connects the T-shaped resistance decrement branch of a network port of described embodiment equalising network, and the other end connects ground.
The selecting frequency characteristic of described embodiment equalising network is controlled by the parameter adjustment of the input series connection microstrip line 8 of series resonant network, electric capacity 2 and output series connection microstrip line 9 with series resonant network quarter-wave short circuit minor matters microstrip line 10.
Described embodiment equalising network series resonant network resonance is at front end frequency, and series resonant network also resonance is at this frequency simultaneously, thus the decay of front end signal reduces as far as possible, other band signals are then decayed by T-shaped attenuation network.Namely along with the increase of frequency, the equalising network of the positive slope that attenuation reduces.The gain frequency response of usual amplifier changes for negative slope, so both superpositions realize wideband gain flatness and unanimously change.
The equalising network of the X-band wideband radio frequency amplifier of this embodiment, its working frequency range is 8-12GHz, and low-frequency range suppresses, and high band promotes, and this embodiment adopts the IPD technological design of GaAs substrate to complete, and equalising network is of a size of 0.7mmx0.8mm.
A kind of negative slope amplitude small signal S-parameters S21 test curve figure that Fig. 3 provides for this embodiment, this embodiment is in X-band (8 ~ 12GHz) frequency band, and low-frequency range decay is many, and high band decay is few；Attenuation amplitude scope is-1.4dB ~-0.2dB, and amplitude equalization amount is 1.2dB, and pass band insertion loss is 0.2dB.
A kind of negative slope amplitude small signal S-parameters S11 test curve figure that Fig. 4 provides for this embodiment.This embodiment return loss in X-band (8 ~ 12GHz) frequency band has reached below-20dB.
A kind of negative slope amplitude small signal S-parameters S22 test curve figure that Fig. 5 provides for this embodiment.This embodiment return loss in X-band (8 ~ 12GHz) frequency band has reached below-20dB.
Claims (6)
1. the equalising network of a wideband radio frequency amplifier, it is characterized in that: this equalising network includes series LC resonant network, T-shaped resistance decrement network and parallel LC resonance network, between the rf inputs mouth RF_IN and the radio frequency output port RF_OUT that are connected to equalising network of described series LC resonant network；Described T-shaped resistance decrement network is connected between RF input port RF_IN and the radio frequency output port RF_OUT of equalising network, and resistance decrement branch of a network end is connected with parallel LC resonance network input port；Described parallel LC resonance network is connected between T-shaped resistance decrement branch of a network and ground；
Described series LC resonant network includes inductance (1) and the electric capacity (2) of series LC resonant network；Wherein inductance (1) one end of series LC resonant network connects the rf inputs mouth RF_IN of described equalising network, and the other end connects the electric capacity (2) of series LC resonant network；Wherein electric capacity (2) one end of series LC resonant network connects the inductance (1) of series LC resonant network, and the other end connects the radio frequency output port RF_OUT of described equalising network；
Described T-shaped resistance decrement network includes the first resistance (3), the second resistance (4) and the 3rd resistance (5)；Wherein the first resistance (3) one end connects the rf inputs mouth RF_IN of described equalising network, and the other end is connected between the second resistance (4) and the 3rd resistance (5)；Wherein the second resistance (4) one end connects the radio frequency output port RF_OUT of described equalising network, and the other end is connected between the first resistance (3) and the 3rd resistance (5)；Wherein the 3rd resistance (5) one end connects the parallel LC resonance network input port of described equalising network, and the other end is connected between the first resistance (3) and the second resistance (4)；
Described parallel LC resonance network includes the inductance (6) of parallel LC resonance network and the electric capacity (7) of parallel LC resonance network；Wherein inductance (6) one end of parallel LC resonance network connects the T-shaped resistance decrement branch of a network port of described equalising network, and the other end connects ground；Wherein electric capacity (7) one end of parallel LC resonance network connects the T-shaped resistance decrement branch of a network port of described equalising network, and the other end connects ground.
2. the equalising network of wideband radio frequency amplifier according to claim 1, it is characterised in that: the amplitude fading amount of described equalising network is by first resistance (3) of T-shaped resistance decrement network, and the resistance adjustment of the second resistance (4) and the 3rd resistance (5) controls.
3. the equalising network of wideband radio frequency amplifier according to claim 1, it is characterised in that: the selecting frequency characteristic of described equalising network is controlled with the inductance (6) of parallel LC resonance network and the parameter adjustment of electric capacity (7) by inductance (1) and the electric capacity (2) of series LC resonant network.
4. the equalising network of wideband radio frequency amplifier according to claim 1, it is characterized in that: when described equalising network is applied to X-band, the inductance (1) of series LC resonant network adopts series connection microstrip line, series connection microstrip line includes input series connection microstrip line, output series connection microstrip line, and described input series connection microstrip line, output series connection microstrip line lay respectively at the two ends of the electric capacity (2) of series LC resonant network；Described parallel LC resonance network adopts quarter-wave short circuit minor matters microstrip line to replace the inductance (6) of parallel LC resonance network and the electric capacity (7) of parallel LC resonance network.
5. the wideband radio frequency amplifier of the equalising network adopted as described in any one of claim 1-4.
6. the well-balanced adjustment method of the equalising network as described in any one of claim 1-4, it is characterized in that: the amplitude fading amount of described equalising network is by first resistance (3) of T-shaped resistance decrement network, and the resistance adjustment of the second resistance (4) and the 3rd resistance (5) controls；The selecting frequency characteristic of described equalising network is controlled with the inductance (6) of parallel LC resonance network and the parameter adjustment of electric capacity (7) by inductance (1) and the electric capacity (2) of series LC resonant network, described equalising network series LC resonant network resonance is at front end frequency, parallel LC resonance network also resonance is at this frequency simultaneously, thus the decay of front end signal reduces as far as possible, other band signals are then decayed by T-shaped attenuation network, namely along with the increase of frequency, the equalising network of the positive slope that attenuation reduces, and the gain frequency of amplifier is rung and is changed for negative slope, thus realizing the consistent change of wideband gain flatness.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106788311A (en) * | 2016-11-30 | 2017-05-31 | 宇龙计算机通信科技(深圳)有限公司 | A kind of terminal capabilities improves circuit and mobile terminal |
| CN106936404A (en) * | 2017-03-14 | 2017-07-07 | 中国电子科技集团公司第二十四研究所 | High-precision wide band numerical-control attenuator |
| CN107911094A (en) * | 2017-12-11 | 2018-04-13 | 广东黑林通信技术有限公司 | A multifunctional equalizer |
| CN108574537A (en) * | 2018-07-19 | 2018-09-25 | 苏州市高事达信息科技股份有限公司 | A kind of electric adjustable balancing control circuit of photoreceiver |
| CN108631766A (en) * | 2017-03-16 | 2018-10-09 | 英飞凌科技股份有限公司 | Reflection type phase deviator with active device tuning |
| CN109286586A (en) * | 2018-09-26 | 2019-01-29 | 昆明理工大学 | Attenuating equalizer and application |
| CN110247635A (en) * | 2018-03-08 | 2019-09-17 | 住友电工光电子器件创新株式会社 | Variable attenuator |
| CN110890871A (en) * | 2019-11-15 | 2020-03-17 | 中国电子科技集团公司第四十三研究所 | Low-pass filter with small dynamic high out-of-band rejection |
| CN111077815A (en) * | 2019-11-27 | 2020-04-28 | 成都芯通软件有限公司 | Compensation system and method for multi-band HFC (hybrid fiber coaxial) equipment with automatically tunable output level |
| CN111600568A (en) * | 2020-05-29 | 2020-08-28 | 四川博谱微波科技有限公司 | Novel broadband passive equalizer |
| CN111698184A (en) * | 2020-06-03 | 2020-09-22 | 中国电子科技集团公司第三十六研究所 | Broadband equalization circuit with adjustable amplitude-frequency characteristic |
| CN116781026A (en) * | 2023-08-24 | 2023-09-19 | 南京纳特通信电子有限公司 | Low-frequency adjustable equalizer for power amplifier system and smooth adjustment method thereof |
| CN117200727A (en) * | 2023-11-06 | 2023-12-08 | 中国电子科技集团公司第二十九研究所 | Coaxial gain equalization device |
| CN117335766A (en) * | 2023-12-01 | 2024-01-02 | 成都世源频控技术股份有限公司 | Ultra-wideband radio frequency equalizer structure |
| CN118944638A (en) * | 2024-10-12 | 2024-11-12 | 安徽矽磊电子科技有限公司 | A broadband low-loss radio frequency delay circuit, radio frequency chip and electronic device |
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| CN106788311A (en) * | 2016-11-30 | 2017-05-31 | 宇龙计算机通信科技(深圳)有限公司 | A kind of terminal capabilities improves circuit and mobile terminal |
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| CN110247635A (en) * | 2018-03-08 | 2019-09-17 | 住友电工光电子器件创新株式会社 | Variable attenuator |
| CN108574537A (en) * | 2018-07-19 | 2018-09-25 | 苏州市高事达信息科技股份有限公司 | A kind of electric adjustable balancing control circuit of photoreceiver |
| CN109286586A (en) * | 2018-09-26 | 2019-01-29 | 昆明理工大学 | Attenuating equalizer and application |
| CN110890871A (en) * | 2019-11-15 | 2020-03-17 | 中国电子科技集团公司第四十三研究所 | Low-pass filter with small dynamic high out-of-band rejection |
| CN111077815B (en) * | 2019-11-27 | 2021-08-31 | 成都芯通软件有限公司 | Compensation system and method for multi-band HFC (hybrid fiber coaxial) equipment with automatically tunable output level |
| CN111077815A (en) * | 2019-11-27 | 2020-04-28 | 成都芯通软件有限公司 | Compensation system and method for multi-band HFC (hybrid fiber coaxial) equipment with automatically tunable output level |
| CN111600568A (en) * | 2020-05-29 | 2020-08-28 | 四川博谱微波科技有限公司 | Novel broadband passive equalizer |
| CN111698184A (en) * | 2020-06-03 | 2020-09-22 | 中国电子科技集团公司第三十六研究所 | Broadband equalization circuit with adjustable amplitude-frequency characteristic |
| CN111698184B (en) * | 2020-06-03 | 2023-03-24 | 中国电子科技集团公司第三十六研究所 | Broadband equalization circuit with adjustable amplitude-frequency characteristic |
| CN116781026A (en) * | 2023-08-24 | 2023-09-19 | 南京纳特通信电子有限公司 | Low-frequency adjustable equalizer for power amplifier system and smooth adjustment method thereof |
| CN116781026B (en) * | 2023-08-24 | 2023-10-20 | 南京纳特通信电子有限公司 | Low-frequency adjustable equalizer for power amplifier system and smooth adjustment method thereof |
| CN117200727A (en) * | 2023-11-06 | 2023-12-08 | 中国电子科技集团公司第二十九研究所 | Coaxial gain equalization device |
| CN117200727B (en) * | 2023-11-06 | 2024-01-23 | 中国电子科技集团公司第二十九研究所 | Coaxial gain equalization device |
| CN117335766A (en) * | 2023-12-01 | 2024-01-02 | 成都世源频控技术股份有限公司 | Ultra-wideband radio frequency equalizer structure |
| CN117335766B (en) * | 2023-12-01 | 2024-03-26 | 成都世源频控技术股份有限公司 | Ultra-wideband radio frequency equalizer structure |
| CN118944638A (en) * | 2024-10-12 | 2024-11-12 | 安徽矽磊电子科技有限公司 | A broadband low-loss radio frequency delay circuit, radio frequency chip and electronic device |
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Application publication date: 20160727 |