LAS FORMAS DE PARTICIPACION
H) DELITO CONEXO
Total Component Count = 9 Inductors = 2 (LQP03T) Resistors = 3
PCB = BFR843EL3 M130129
Layer spacing (top RF to internal ground plane): 0.2 mm All passives are “0201“ case size
Inductors: LQP03T
Figure 5 Schematic Diagram of the Application Circuit
Table 11 Bill-of-Materials
Symbol Value Unit Size Manufacturer Comment
C1 15 pF 0201 Various Input DC block & input matching
C2 10 pF 0201 Various Output DC block & output matching
C3 1 nF 0201 Various RF decoupling / blocking cap
C4 33 pF 0201 Various RF decoupling & output matching
L1 15 nH 0201 LQP03T Input matching & Base biasing
L2 12 nH 0201 LQP03T Output matching & Collector biasing
R1 100 Ω 0201 Various
DC biasing (provides DC negative feedback to stabilize DC operating point over temperature variation, transistor hFE variation, etc.)
R2 39 kΩ 0201 Various DC biasing
R3 10 Ω 0201 Various Output matching
Q1 TSLP-3-9 Infineon Technologies BFR843EL3 SiGe:C Heterojunction
Bipolar RF Transistor
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Measurement Graphs
4 Measurement Graphs
500 1000 1500 2000 2500 3000 3500 4000
Frequency (MHz)
Figure 6 Power Gain of the 700 – 3800 MHz Broad-Band LTE LNA with BFR843EL3
500 1000 1500 2000 2500 3000 3500 4000
Frequency (MHz)
Figure 7 Reverse Isolation of the 700 – 3800 MHz Broad-Band LTE LNA with BFR843EL3
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Measurement Graphs
700 1400 2100 2800 3500 3800
Frequency (MHz)
Figure 8 Noise Figure of the 700 – 3800 MHz Broad-Band LTE LNA with BFR843EL3
500 1000 1500 2000 2500 3000 3500 4000
Frequency (MHz)
Figure 9 Input Matching of the 700 – 3800 MHz Broad-Band LTE LNA with BFR843EL3
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Measurement Graphs
x -0.416638 2620 MHz r 0.90913
Figure 10 Input Matching of the 700 – 3800 MHz Broad-Band LTE LNA with BFR843EL3 (Smith Chart)
500 1000 1500 2000 2500 3000 3500 4000
Frequency (MHz)
Figure 11 Output Matching of the 700 – 3800 MHz Broad-Band LTE LNA with BFR843EL3
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Measurement Graphs
Figure 12 Output Matching of the 700 – 3800 MHz Broad-Band LTE LNA with BFR843EL3 (Smith Chart)
0 2000 4000 6000 8000 10000
Frequency (MHz)
Figure 13 Stability K Factor of the Broad-Band LTE LNA with BFR843EL3
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Measurement Graphs
100 2100 4100 6100 8100 10000
Frequency (MHz)
Stability Mu Factor
0 1 2 3 4 5
Mu2 factor Mu1 factor
Figure 14 Stability Mu Factor of the Broad-Band LTE LNA with BFR843EL3
-35 -30 -25 -20 -15 -10
Pin (dBm)
Input 1dB Compression Point_806MHz
0 5 10 15 20 25
Gain(dB)
-34.9 dBm 20.76 dB
-19.5 dBm 19.76 dB
Figure 15 Input 1dB Compression Point of the Broad-Band LTE LNA with BFR843EL3 (Measured at 806 MHz)
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Measurement Graphs
-35 -30 -25 -20 -15 -10
Pin (dBm)
Input 1dB Compression Point_1503MHz
0 5 10 15 20 25
Gain(dB)
-35 dBm 19.33 dB
-16.8 dBm 18.33 dB
Figure 16 Input 1dB Compression Point of Broad-Band LTE LNA with BFR843EL3 (Measured at 1503 MHz)
-35 -30 -25 -20 -15 -10
Pin (dBm)
Input 1dB Compression Point_1900MHz
0 5 10 15 20 25
Gain(dB)
-35 dBm
18.22 dB
-16.4 dBm17.22 dB
Figure 17 Input Input 1dB Compression Point of the Broad-Band LTE LNA with BFR843EL3 (Measured at 1900 MHz)
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Measurement Graphs
-35 -30 -25 -20 -15 -10
Pin (dBm)
Input 1dB Compression Point_2140MHz
0 5 10 15 20 25
Gain(dB)
-16.4 dBm 16.59 dB -35 dBm
17.59 dB
Figure 18 Input 1dB Compression Point of the Broad-Band LTE LNA with BFR843EL3 (Measured at 2140 MHz)
-35 -30 -25 -20 -15 -10
Pin (dBm)
Input 1dB Compression Point_2620MHz
0 5 10 15 20 25
Gain(dB)
-15.4 dBm 15.36 dB -35 dBm
16.36 dB
Figure 19 Input 1dB Compression Point of the Broad-Band LTE LNA with BFR843EL3 (Measured at 2620 MHz)
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Measurement Graphs
-35 -30 -25 -20 -15 -10
Pin (dBm)
Input 1dB Compression Point_3500MHz
0 5 10 15 20 25
Gain(dB)
-14.1 dBm 13.45 dB
-35 dBm 14.45 dB
Figure 20 Input 1dB Compression Point of the Broad-Band LTE LNA with BFR843EL3 (Measured at 3500 MHz)
-35 -30 -25 -20 -15 -10
Pin (dBm)
Input 1dB Compression Point_3700MHz
0 5 10 15 20 25
Gain(dB)
-13.7 dBm 13.06 dB -35 dBm
14.06 dB
Figure 21 Input 1dB Compression Point of the Broad-Band LTE LNA with BFR843EL3 (Measured at 3700 MHz)
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Measurement Graphs
804 805 806 807 808 809
Frequency (MHz)
Output 3rd Order Intercept Point_806MHz
-100
Figure 22 Output 3rd Order Intercept Point of the Broad-Band LTE LNA with BFR843EL3 at 806 MHz (LNA input power = -30 dBm)
1501 1502 1503 1504 1505 1506
Frequency (MHz)
Output 3rd Order Intercept Point_1503MHz
-100
Figure 23 Output 3rd Order Intercept Point of the Broad-Band LTE LNA with BFR843EL3 at 1503 MHz (LNA input power = -30 dBm)
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Measurement Graphs
1898 1899 1900 1901 1902 1903
Frequency (MHz)
Output 3rd Order Intercept Point_1900MHz
-100
Figure 24 Output 3rd Order Intercept Point of the Broad-Band LTE LNA with BFR843EL3 at 1900 MHz (LNA input power = -30 dBm)
2138 2139 2140 2141 2142 2143
Frequency (MHz)
Output 3rd Order Intercept Point_2140MHz
-100
Figure 25 Output 3rd Order Intercept Point of the Broad-Band LTE LNA with BFR843EL3 at 2140 MHz (LNA input power = -30 dBm)
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Measurement Graphs
2618 2619 2620 2621 2622 2623
Frequency (MHz)
Output 3rd Order Intercept Point_2620MHz
-100
Figure 26 Output 3rd Order Intercept Point of the Broad-Band LTE LNA with BFR843EL3 at 2620 MHz (LNA input power = -30 dBm)
3498 3499 3500 3501 3502 3503
Frequency (MHz)
Output 3rd Order Intercept Point_3500MHz
-100
Figure 27 Output 3rd Order Intercept Point of the Broad-Band LTE LNA with BFR843EL3 at 3500 MHz (LNA input power = -30 dBm)
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Measurement Graphs
3698 3699 3700 3701 3702 3703
Frequency (MHz)
Output 3rd Order Intercept Point_3700MHz
-100 -80 -60 -40 -20 0
Power (dBm)
3700 MHz -16.1
3699 MHz -77
3701 MHz -16.1
3702 MHz -77.7
Figure 28 Output 3rd Order Intercept Point of the Broad-Band LTE LNA with BFR843EL3 at 3700 MHz (LNA input power = -30 dBm)
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Evaluation Board and Layout Information
5 Evaluation Board and Layout Information
Figure 29 Photo Picture of Evaluation Board for 700 – 3800 MHz Broad-Band LTE LNA with BFR843EL3
Figure 30 Zoom-In of Photo Picture
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Evaluation Board and Layout Information
0.2 mm
0.1mm
B C
E
BFR843EL3
Figure 31 Layout Proposal for RF Grounding of the 700 – 3800 MHz Broad-Band LTE LNA with BFR843EL3
Figure 32 PCB Layer Information Copper
35µm
FR4 Core, 0.2mm
FR4 Prepreg, 0.8mm Vias
BFR843EL3 Broad-Band LNA for 700 - 3800 MHz LTE Applications
Authors
6 Authors
Bingqing Dai, Internship Student of Application Engineering of Business Unit “RF and Protection Devices”
Shamsuddin Ahmed, Application Engineer of Business Unit “RF and Protection Devices”
w w w . i n f i n e o n . c o m
Published by Infineon Technologies AG AN328