Typical Circuit of RF used in Handset 2022213

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Typical Circuit of RF used in Handset 手机射频部分典型电路分析 2022/2/13 RF DBTEL 1

Typical Circuit of RF used in Handset 手机射频部分典型电路分析 2022/2/13 RF DBTEL 1

2022/2/13 RF DBTEL 3

2022/2/13 RF DBTEL 3

Outline 收发器(Transceiver) 锁相环(PLL) 功率控制环路(APC) 收发双 器(Diplexer) 衰减网络(Attenuation) 匹配网络(Matching) 滤波网络(Filter) 平衡网络(Balance) 其它 2022/2/13 RF DBTEL

Outline 收发器(Transceiver) 锁相环(PLL) 功率控制环路(APC) 收发双 器(Diplexer) 衰减网络(Attenuation) 匹配网络(Matching) 滤波网络(Filter) 平衡网络(Balance) 其它 2022/2/13 RF DBTEL 4

2022/2/13 RF DBTEL 返回 7

2022/2/13 RF DBTEL 返回 7

PLL Block Diagram 返回 2022/2/13 RF DBTEL 10

PLL Block Diagram 返回 2022/2/13 RF DBTEL 10

基本构成电路分析 鉴相器(Phase Detector) 电荷泵——环路低通滤波器 (Charge Pump——Loop Filter ) 压控振荡器(Voltage Controlled Oscillator) 分频器(DIV) 2022/2/13 RF

基本构成电路分析 鉴相器(Phase Detector) 电荷泵——环路低通滤波器 (Charge Pump——Loop Filter ) 压控振荡器(Voltage Controlled Oscillator) 分频器(DIV) 2022/2/13 RF DBTEL 13

环路低通滤波器(Low Pass Filter) phase detector VCO Rz Cp R 4 Cz To important the

环路低通滤波器(Low Pass Filter) phase detector VCO Rz Cp R 4 Cz To important the transient characteristics To further reduce the phase noise of the charge pump The loop can track better a change in input frequency 2022/2/13 RF DBTEL 16

VCO的选择要素 High spectral purity Linear voltage-frequency transfer characteristic Good frequency stability to temperature Frequency

VCO的选择要素 High spectral purity Linear voltage-frequency transfer characteristic Good frequency stability to temperature Frequency deviation capability >>the max. PLL capture range Time response Low power consumption and Output level Output harmonic level and tuning sensitivity Phase noise 详见TXVCO Data Sheet RXVCO Data Sheet 2022/2/13 RF DBTEL 返回 19

返回 2022/2/13 RF DBTEL 22

返回 2022/2/13 RF DBTEL 22

Directional Coupler Insertion Loss O/P Po I/P PI Coupli ng O/P PC PI :

Directional Coupler Insertion Loss O/P Po I/P PI Coupli ng O/P PC PI : Input power PO: Output power PC: Coupling power PI*: Incident Power in wrong direction PC*: Coupling power when incident power in wrong direction 2022/2/13 RF DBTEL 27

0 d. Bm=1 m. W 10 d. Bm=10 m. W 30 d. Bm=1 W

0 d. Bm=1 m. W 10 d. Bm=10 m. W 30 d. Bm=1 W 2022/2/13 d. B------功率比 12 d. B---16 9 d. B---8 6 d. B---4 3 d. B---2 0 d. B---1 -3 d. B---1/2=0. 5 -6 d. B---1/4=0. 25 -9 d. B---1/8=0. 125 -12 d. B---1/16=0. 0625 -15 d. B---1/32=0. 03125 -18 d. B---1/64=0. 015625 RF DBTEL 返 回 30

参数计算方法 Coupling= Insertion Loss= Isolation= Directivity=Coupling-Isolation>0 2022/2/13 RF DBTEL 31

参数计算方法 Coupling= Insertion Loss= Isolation= Directivity=Coupling-Isolation>0 2022/2/13 RF DBTEL 31

计算举例(全用对数计算) PI : 0 d. Bm Coupling=-20 d. Bm PC : 20 d. Bm

计算举例(全用对数计算) PI : 0 d. Bm Coupling=-20 d. Bm PC : 20 d. Bm Insertion Loss= -1 d. Bm PO : -1 d. Bm Isolation= -40 d. Bm PI* : 0 d. Bm Directivity= Coupling- Isolation PC* : -40 d. Bm =20 d. Bm 2022/2/13 RF DBTEL 32

收发双 器的特性参数(TX/RX) Frequency Range (MHz) Insertion Loss (d. B) Attenuation(d. B) V. S. W.

收发双 器的特性参数(TX/RX) Frequency Range (MHz) Insertion Loss (d. B) Attenuation(d. B) V. S. W. R. Isolation (d. B) Harmonics 2 xfo, 3 xfo (d. Bc) Power Capacity (d. Bm) 详见LMC 33 -07 A 0524 A Data Sheet 2022/2/13 RF DBTEL 返回 38

衰减网络的应用 返回 2022/2/13 RF DBTEL 43

衰减网络的应用 返回 2022/2/13 RF DBTEL 43

天线匹配的举例 返回 2022/2/13 RF DBTEL 45

天线匹配的举例 返回 2022/2/13 RF DBTEL 45

平衡网络(Balance) Balance电路构成: UI 分别经过低通、高通得到反相的UO 1 、UO 2 L R s UI C C L

平衡网络(Balance) Balance电路构成: UI 分别经过低通、高通得到反相的UO 1 、UO 2 L R s UI C C L 2022/2/13 RF DBTEL UO 1 Rdiff Rs UO 2 Rs:特性阻抗 Rdiff :输入阻抗 57

差模、共模在Balance系统上的传输 差模(Differential Mode) A I/P O/P B I/P O/P C B的传输量为A的一半 共模(Common Mode) I/P

差模、共模在Balance系统上的传输 差模(Differential Mode) A I/P O/P B I/P O/P C B的传输量为A的一半 共模(Common Mode) I/P O/P 返回 2022/2/13 RF DBTEL 59

Reference 《射频锁相环》 《分频器》 《高速电路板设计技术》 RF Circuit Fundamentals Transmission Line/Smith Chart Data Sheet: UAA 3535、TXVCO、RXVCO、PA-BGY

Reference 《射频锁相环》 《分频器》 《高速电路板设计技术》 RF Circuit Fundamentals Transmission Line/Smith Chart Data Sheet: UAA 3535、TXVCO、RXVCO、PA-BGY 280、 PCF 5078、 LMC 33 -07 A 0524 A、lc 03 c 、 lc 66 e、LDC 10 B 140 J 1747 返回 2022/2/13 RF DBTEL 65