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公开(公告)号：US20230246597A1
公开(公告)日：2023-08-03
申请号：US18132426
申请日：2023-04-10
发明人： LIYUAN CAI , KAI XUAN , JIASHUAI GUO
CPC分类号： H03F1/0288 , H03F1/42 , H03F3/245 , H03F2200/36 , H03F2200/222 , H03F2200/387 , H03F2200/451
摘要： A broadband Doherty power amplifier is provided, which includes a power divider, a carrier power amplifier circuit, a peak power amplifier circuit, and a load modulation network. The carrier power amplifier circuit includes a carrier input matching circuit, a carrier power amplifier, and a carrier output matching circuit. The peak power amplifier circuit includes a peak input matching circuit, a peak power amplifier and a peak output matching circuit. A resistance value of a system load is ZL. An output impedance of the carrier output matching circuit is Zm and meets Zm=ZL(n+ 1). An output impedance of the peak output matching circuit is Zp and meets Zp ZL(n+1)/n. The load modulation network is configured to set an impedance of a combination point to be ZQ, whose resistance value is ZL. A method of implementing a broadband Doherty power amplifier is further provided.
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公开(公告)号：US10044334B2
公开(公告)日：2018-08-07
申请号：US15853835
申请日：2017-12-24
发明人： Hua Long , Liyang Zhang , Zhenjuan Cheng , Dongjie Tang , Qian Zhao
摘要： A power amplifier gain attenuation circuit includes: a gain attenuation (reduction) circuit configured to receive an input signal, an external drive signal and a bias voltage, and output a secondary input signal after attenuating the input signal depending on the drive signal and bias voltage; an amplifier including: a bias input terminal configured to receive a bias voltage; a signal input terminal configured to receive a secondary input signal, and an output terminal configured to output a gained output signal. The power amplifier gain attenuation circuit can reduce a gain effectively, and the amount of phase jump caused by the attenuation is quite small.
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公开(公告)号：US20180138881A1
公开(公告)日：2018-05-17
申请号：US15853950
申请日：2017-12-25
发明人： Hua LONG , Liyang ZHANG , Zhenjuan CHENG , Dongjie TANG , Qian ZHAO
CPC分类号： H03G3/3042 , H03F1/0211 , H03F1/0261 , H03F1/565 , H03F3/19 , H03F3/195 , H03F3/21 , H03F3/45 , H03F2200/111 , H03F2200/18 , H03F2200/36 , H03F2200/387 , H03F2200/405 , H03F2200/411 , H03F2200/451 , H03F2200/462 , H03G1/0088
摘要： A power amplifier output power control circuit includes a first operational amplifier with a negative input terminal configured to receive a power control signal; a first PMOS transistor with a grid electrode connected to an output terminal of the first operational amplifier, a source electrode connected to an external power source, and a drain electrode grounded via a voltage dividing network; a power amplifier with a power end connected to the drain electrode of the first PMOS transistor, an input terminal configured to access to a signal to be amplified, and an output terminal configured to amplify the signal; and a current sampling circuit configured to produce sampling current after sampling current across the first PMOS transistor and providing a negative feedback signal for the positive input terminal of the first operational amplifier according to the sampling current such that total output power of the power amplifier keeps unchanged.
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公开(公告)号：US09595933B2
公开(公告)日：2017-03-14
申请号：US15139087
申请日：2016-04-26
发明人： Qian Zhao , Liyang Zhang , Hua Long , Zhenjuan Cheng , Dongjie Tang
CPC分类号： H03G3/3042 , H03F1/0211 , H03F1/0261 , H03F1/565 , H03F3/19 , H03F3/195 , H03F3/21 , H03F3/45 , H03F2200/111 , H03F2200/18 , H03F2200/36 , H03F2200/387 , H03F2200/405 , H03F2200/411 , H03F2200/451 , H03F2200/462 , H03G1/0088
摘要： A multi-mode multi-band power amplifier and its circuits are provided. The power amplifier comprises a controller, a wide-band amplifier channel, and a fundamental impedance transformer. The controller receives an external signal and outputs a control signal according to the external signal. The wide-band amplifier channel receives a single-band or a multi-band RF signals through the input terminal, performs power amplification on the RF signals and outputs the RF signals through the output terminal. The fundamental impedance transformer comprises a first segment shared by RF signals in all bands, second segments respectively specific to RF signals in all bands, and a switching circuit controlled by the controller to separate a RF signal which is subject to power amplification to the second segment in a switchable manner for multiplexed outputs. A power amplifier output power control circuit, a gain switching circuit, and a gain attenuation circuit are also provided.
摘要翻译： 提供了多模式多频带功率放大器及其电路。 功率放大器包括控制器，宽带放大器通道和基波阻抗变压器。 控制器接收外部信号，并根据外部信号输出控制信号。 宽带放大器通道通过输入端接收单频带或多频带RF信号，对RF信号进行功率放大，并通过输出端输出RF信号。 基本阻抗变压器包括由所有频带中的RF信号共享的第一段，分别专用于所有频带中的RF信号的第二段，以及由控制器控制的将受功率放大的RF信号分离到第二段的开关电路 以可切换的方式进行多路复用输出。 还提供功率放大器输出功率控制电路，增益切换电路和增益衰减电路。
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公开(公告)号：US11848650B2
公开(公告)日：2023-12-19
申请号：US18132422
申请日：2023-04-10
发明人： Zhiyuan Xie , Yuting Zhao , Jiashuai Guo
CPC分类号： H03F3/21 , H03F1/565 , H03F2200/255 , H03F2200/387
摘要： A differential power amplifier includes an input matching network, a first-stage amplification circuit, a first inter-stage matching network, a second-stage amplification circuit, a second inter-stage matching network, a third-stage amplification circuit, and an output matching network. The first-stage amplification circuit and the second-stage amplification circuit are single-ended input single-ended output circuits. The third-stage amplification circuit is a dual input dual output circuit. The second inter-stage matching network includes a first transformer T1, a first capacitor C1, a second capacitor C2, a first inductor L1, and a second inductor L2. The output matching network includes a second transformer T2. The inter-stage matching networks and the output matching network are realized by the first transformer T1 and the second transformer T2, which reduces an inter-stage matching difficulty, optimizes input return loss and gain, and improves output power.
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公开(公告)号：US11848474B2
公开(公告)日：2023-12-19
申请号：US18353884
申请日：2023-07-18
发明人： Shulun Li , Jiashuai Guo
CPC分类号： H01P3/006 , H01P3/10 , H01P5/1015
摘要： A coplanar waveguide transmission line and a design method thereof are provided. The coplanar waveguide transmission line includes a first dielectric substrate, a center conductor strip, and two ground conductor strips. The first dielectric substrate has a first surface and a second surface opposite to each other. The center conductor strip and the ground conductor strips are stacked and fixed to the first surface. The center conductor strip includes a first segment and a second segment. A width of the first segment is greater than a width of the second segment, so that the first segment and the second segment form a step structure. A rectangular groove recessed toward the second surface is defined in the first surface, and a part of the center conductor strip is stacked and fixed to a side, distal from the second surface, of the rectangular groove to form a defected ground structure.
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7.发明申请公开(公告)号：US20200169224A1
公开(公告)日：2020-05-28
申请号：US16630513
申请日：2017-10-19
发明人： Jiahui ZHOU , Bin HU , Jiashuai GUO , Kai XUAN , Hua LONG
摘要： A circuit structure for improving the harmonic suppression capability of a radio frequency power amplifier includes an output stage unit, a high-order harmonic suppression unit, and a low-order harmonic suppression unit. The output stage unit outputs a signal to be subjected to harmonic suppression; the high-order harmonic suppression unit comprises a first filter capacitor and a back hole, and is used for suppressing fifth or higher harmonics; the output stage unit and the first filter capacitor are connected to the ground in series by means of the back hole; the low-order harmonic suppression unit is connected to the output stage unit to suppress second, third and fourth harmonics. According to the design, the high-harmonic suppression capability of the radio frequency power amplifier is improved.
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公开(公告)号：US20180123539A1
公开(公告)日：2018-05-03
申请号：US15854738
申请日：2017-12-26
发明人： Hua LONG , Liyang ZHANG , Zhenjuan CHENG , Dongjie TANG , Qian ZHAO
CPC分类号： H03G3/3042 , H03F1/0211 , H03F1/0261 , H03F1/565 , H03F3/19 , H03F3/195 , H03F3/21 , H03F3/45 , H03F2200/111 , H03F2200/18 , H03F2200/36 , H03F2200/387 , H03F2200/405 , H03F2200/411 , H03F2200/451 , H03F2200/462 , H03G1/0088
摘要： A multi-mode multi-band power amplifier includes a controller, a wide-band amplifier channel and a fundamental impedance transformer. The controller receives an external signal and outputs a control signal according to the external signal. The wide-band amplifier channel receives single-band or multi-band RF signals through the input terminal, performs power amplification on the RF signals and outputs the RF signals through the output terminal. The fundamental impedance transformer includes a first segment shared by RF signals in all bands, second segments respectively special for RF signals in all bands, and a switching circuit controlled by the controller to separate RF signals subject to power amplification to the second segment in a switchable manner for multiplexed outputs.
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公开(公告)号：US11575352B2
公开(公告)日：2023-02-07
申请号：US16956249
申请日：2018-09-07
发明人： Jiahui Zhou , Bin Hu , Jiashuai Guo , Kai Xuan
摘要： A matching circuit structure for effectively suppressing the low-frequency clutter of a power amplifier of a mobile phone, falling within the technical field of radio frequency Pas is provided. The circuit structure includes an input end, a blocking capacitor, a power amplifier (PA), an output matching network and an output end connected in series; and the matching circuit structure further includes a negative feedback network connected in parallel to a transmission end of the PA; the negative feedback network includes a resonant capacitor, a resonant inductor and a matching inductor; the resonant capacitor and the resonant inductor are connected in parallel to form a frequency selecting network, and the frequency selecting network is connected in series with the matching inductor and to the ground. The matching circuit structure above can be used to effectively suppress the low-frequency clutter of a power amplifier.
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公开(公告)号：US11139783B2
公开(公告)日：2021-10-05
申请号：US16630513
申请日：2017-10-19
发明人： Jiahui Zhou , Bin Hu , Jiashuai Guo , Kai Xuan , Hua Long
摘要： A circuit structure for improving the harmonic suppression capability of a radio frequency power amplifier includes an output stage unit, a high-order harmonic suppression unit, and a low-order harmonic suppression unit. The output stage unit outputs a signal to be subjected to harmonic suppression; the high-order harmonic suppression unit comprises a first filter capacitor and a back hole, and is used for suppressing fifth or higher harmonics; the output stage unit and the first filter capacitor are connected to the ground in series by means of the back hole; the low-order harmonic suppression unit is connected to the output stage unit to suppress second, third and fourth harmonics. According to the design, the high-harmonic suppression capability of the radio frequency power amplifier is improved.
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