针对无线通信应用的射频功率放大器,提出了一种新颖的温度补偿电路。应用该温度补偿电路,设计了一款基于In Ga P/Ga As HBT工艺的两级F类功率放大器。该功率放大器采用了带温度补偿特性的有源偏置电路,能有效地提高线性度,补偿温度引起...针对无线通信应用的射频功率放大器,提出了一种新颖的温度补偿电路。应用该温度补偿电路,设计了一款基于In Ga P/Ga As HBT工艺的两级F类功率放大器。该功率放大器采用了带温度补偿特性的有源偏置电路,能有效地提高线性度,补偿温度引起的性能偏差;输出匹配网络采用F类功率放大器谐波理论而设计。在1 920~1 980 MHz频段和电源电压3.4 V条件下,测得常温状态该功率放大器增益为27 d B;输出功率在28 d Bm时功率附加效率达到42%,邻信道功率比为?36 d Bc;在?20℃~80℃之间功率附加效率和邻信道功率比基本不变。展开更多
针对LTE应用的射频功率放大器,提出了一种结构简单的改善功率放大器性能的方法,并应用该方法设计了一个基于In Ga P/Ga As HBT工艺的两级F类功率放大器。该功率放大器采用了三阶交调失真消除技术、级间谐波抑制网络和带温度补偿特性的...针对LTE应用的射频功率放大器,提出了一种结构简单的改善功率放大器性能的方法,并应用该方法设计了一个基于In Ga P/Ga As HBT工艺的两级F类功率放大器。该功率放大器采用了三阶交调失真消除技术、级间谐波抑制网络和带温度补偿特性的有源偏置电路以达到高线性度。此外,输出采用F类功率放大器谐波理论以获得高效率。该功放在工作电压为3.4 V,频率2.35 GHz处,分别使用连续波信号和10 MHz LTE调制信号输入测得:增益为27.5 d B,1 d B压缩点为30 d Bm,最高效率点达到46%;平均输出功率为28 d Bm时,无线接入邻道泄漏率为-38.4d Bc,功率附加效率为38%。展开更多
Abstract An f-coloring of a graph G is an edge-coloring of G such that each color appears at each vertex v ∈ V（G） at most f（v） times. The f-core of G is the subgraph of G induced by the vertices v of degree d（v...Abstract An f-coloring of a graph G is an edge-coloring of G such that each color appears at each vertex v ∈ V（G） at most f（v） times. The f-core of G is the subgraph of G induced by the vertices v of degree d（v） = f（v）maxv∈y（G）{ [d（v）/f（v）l}. In this paper, we find some necessary conditions for a simple graph, whose f-core has maximum degree two, to be of class 2 for f-colorings.展开更多
A broadband class-F power amplifier for an S-band handset device is integrated on a 330.82 mm^3 die using an In Ga /GaAs HBT process. With LC serial harmonic traps immersed into the broadband output matching circuit, ...A broadband class-F power amplifier for an S-band handset device is integrated on a 330.82 mm^3 die using an In Ga /GaAs HBT process. With LC serial harmonic traps immersed into the broadband output matching circuit, good harmonic suppression performance can be achieved. A pure resistive impedance of the matching circuit, but near zero at second and infinite at third harmonic frequency, which enhances the efficiency, is obtained across 1.8–2.5 GHz. Tested with a continuous wave（CW） signal, the PA delivers an output power of 34 dBm and achieves a PAE of 57% at 2 GHz. In addition, excellent harmonic suppression levels of less than –53 dBc across the second to fifth harmonic are obtained.展开更多
基于0.5μm Ga As PHEMT工艺,设计一款能应用于2.4 GHz ISM频段的WLAN 802.11b/g协议功率放大器。输出级采用负载线匹配的设计方法,并嵌入了对奇次谐波回收,偶次谐波抑制的网络,使之工作在F类,整机获得了较高附加效率。提出一种匹配计...基于0.5μm Ga As PHEMT工艺,设计一款能应用于2.4 GHz ISM频段的WLAN 802.11b/g协议功率放大器。输出级采用负载线匹配的设计方法,并嵌入了对奇次谐波回收,偶次谐波抑制的网络,使之工作在F类,整机获得了较高附加效率。提出一种匹配计算方法与电路结构,兼顾输出功率和效率最大化,可对功率输出级进行优化匹配设计。该功放工作电压为5 V,仿真结果表明:在2.4 GHz频段内,1 d B压缩点时的输出功率为31.7 d Bm,输出效率为51.8%,功率增益大于35 d B,对高阶偶次谐波抑制大于47 d B,对低阶奇次谐波进行了回收,获得了高效率。展开更多
微波功率传输是实现空间太阳能电站的关键技术之一,本文给出了2.45GHz高效Ga N F类功率放大器的设计。仿真得到该功放功率附加效率为78.8%,输出功率40.3d Bm,该结果预示了其在相关领域的应用。最终对放大器电路进行了测试,实测得到放大...微波功率传输是实现空间太阳能电站的关键技术之一,本文给出了2.45GHz高效Ga N F类功率放大器的设计。仿真得到该功放功率附加效率为78.8%,输出功率40.3d Bm,该结果预示了其在相关领域的应用。最终对放大器电路进行了测试,实测得到放大器在2.45GHz工作频点上漏极效率为67.3%,饱和输出功率38.2d Bm,增益8d B。展开更多
文摘针对无线通信应用的射频功率放大器,提出了一种新颖的温度补偿电路。应用该温度补偿电路,设计了一款基于In Ga P/Ga As HBT工艺的两级F类功率放大器。该功率放大器采用了带温度补偿特性的有源偏置电路,能有效地提高线性度,补偿温度引起的性能偏差;输出匹配网络采用F类功率放大器谐波理论而设计。在1 920~1 980 MHz频段和电源电压3.4 V条件下,测得常温状态该功率放大器增益为27 d B;输出功率在28 d Bm时功率附加效率达到42%,邻信道功率比为?36 d Bc;在?20℃~80℃之间功率附加效率和邻信道功率比基本不变。
文摘针对LTE应用的射频功率放大器,提出了一种结构简单的改善功率放大器性能的方法,并应用该方法设计了一个基于In Ga P/Ga As HBT工艺的两级F类功率放大器。该功率放大器采用了三阶交调失真消除技术、级间谐波抑制网络和带温度补偿特性的有源偏置电路以达到高线性度。此外,输出采用F类功率放大器谐波理论以获得高效率。该功放在工作电压为3.4 V,频率2.35 GHz处,分别使用连续波信号和10 MHz LTE调制信号输入测得:增益为27.5 d B,1 d B压缩点为30 d Bm,最高效率点达到46%;平均输出功率为28 d Bm时,无线接入邻道泄漏率为-38.4d Bc,功率附加效率为38%。
基金Supported by National Natural Science Foundation of China(Grant Nos.10901097,11001055)Tianyuan Youth Foundation of Mathematics(Grant No.10926099)+1 种基金Natural Science Foundation of Shandong(Grant No.ZR2010AQ003)Shandong Province Higher Educational Science and Technology Program(Grant No.G13LI04)of China
文摘Abstract An f-coloring of a graph G is an edge-coloring of G such that each color appears at each vertex v ∈ V（G） at most f（v） times. The f-core of G is the subgraph of G induced by the vertices v of degree d（v） = f（v）maxv∈y（G）{ [d（v）/f（v）l}. In this paper, we find some necessary conditions for a simple graph, whose f-core has maximum degree two, to be of class 2 for f-colorings.
文摘A broadband class-F power amplifier for an S-band handset device is integrated on a 330.82 mm^3 die using an In Ga /GaAs HBT process. With LC serial harmonic traps immersed into the broadband output matching circuit, good harmonic suppression performance can be achieved. A pure resistive impedance of the matching circuit, but near zero at second and infinite at third harmonic frequency, which enhances the efficiency, is obtained across 1.8–2.5 GHz. Tested with a continuous wave（CW） signal, the PA delivers an output power of 34 dBm and achieves a PAE of 57% at 2 GHz. In addition, excellent harmonic suppression levels of less than –53 dBc across the second to fifth harmonic are obtained.
文摘基于0.5μm Ga As PHEMT工艺,设计一款能应用于2.4 GHz ISM频段的WLAN 802.11b/g协议功率放大器。输出级采用负载线匹配的设计方法,并嵌入了对奇次谐波回收,偶次谐波抑制的网络,使之工作在F类,整机获得了较高附加效率。提出一种匹配计算方法与电路结构,兼顾输出功率和效率最大化,可对功率输出级进行优化匹配设计。该功放工作电压为5 V,仿真结果表明:在2.4 GHz频段内,1 d B压缩点时的输出功率为31.7 d Bm,输出效率为51.8%,功率增益大于35 d B,对高阶偶次谐波抑制大于47 d B,对低阶奇次谐波进行了回收,获得了高效率。
