High Linearity Low Noise Amplifier for ISDB-T Application

BF R38 0F
High Lin e arit y Lo w Nois e A m plifier fo r
IS DB -T A pplicati on
Technic al Rep ort T R 1108
Revision: Rev. 1.0
2012-07-17
RF and P r otecti on D evic es
Edition 2012-07-17
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2012 Infineon Technologies AG
All Rights Reserved.
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BFR380F
High Linearity LNA for ISDB-T Application
Technical Report TR1108
Revision History: 2012-07-17
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Technical Report TR1108, Rev. 1.0
3 / 17
2012-07-17
BFR380F
High Linearity LNA for ISDB-T Application
List of Content, Figures and Tables
Table of Content
1
Overview ............................................................................................................................................. 5
2
Summary of Measurement Results .................................................................................................. 5
3
Description .......................................................................................................................................... 6
4
Schematics ......................................................................................................................................... 7
5
Measured Graphs ............................................................................................................................... 8
6
Evaluation Board and Layout Information .................................................................................... 15
7
Authors .............................................................................................................................................. 16
List of Figures
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Schematic Diagram of the used Circuit ................................................................................................ 7
Insertion Power Gain of the 430-770 MHz ISDB-T LNA using BFR380F ............................................ 8
Reverse Isolation of the the 430-770 MHz ISDB-T LNA using BFR380F............................................ 8
Noise Figure of the the 430-770 MHz ISDB-T LNA using BFR380F ................................................... 9
Input 1dB compression point of the ISDB-T LNA using BFR380F at 430MHz .................................... 9
Input 1dB compression point of the ISDB-T LNA using BFR380F at 770MHz .................................. 10
Input Matching of the 430-770 MHz ISDB-T LNA using BFR380F .................................................... 10
Input Matching of the 430-770 MHz ISDB-T LNA using BFR380F (Smith Chart) ............................. 11
Output Matching of the 430-770 MHz ISDB-T LNA using BFR380F ................................................. 11
Output Matching of the 430-770 MHz ISDB-T LNA using BFR380F (Smith Chart) .......................... 12
Wideband Stability K Factor of the 430-770 MHz ISDB-T LNA using BFR380F ............................... 12
Wideband Stability Mu Factor of the 430-770 MHz ISDB-T LNA using BFR380F ............................ 13
rd
Output 3 Order Intercept Point of the ISDB-T LNA using BFR380F at 431MHz ............................. 13
rd
Output 3 Order Intercept Point of the ISDB-T LNA using BFR380F at 768MHz ............................. 14
Photo of the BFR380F circuit on the Evaluation Board (PCB Marking M111118) ............................ 15
PCB Layer Information ....................................................................................................................... 15
List of Tables
Table 1
Table 2
Summary of Measurement Results ...................................................................................................... 5
Bill-of-Materials..................................................................................................................................... 7
Technical Report TR1108, Rev. 1.0
4 / 17
2012-07-17
BFR380F
High Linearity LNA for ISDB-T Application
Overview
1
Overview
Device:
BFR380F
Application:
High Linearity LNA for ISDB-T Application
PCB Marking: M111118 2.0mm EDG
2
Summary of Measurement Results
Table 1
Summary of Measurement Results
Parameter
Symbol
Value
Unit
DC Voltage
Vcc
4.5
V
DC Current
Icc
22.0
mA
Frequency Range
Freq
430
770
MHz
Gain
G
16.1
13.9
dB
Noise Figure
NF
1.6
1.4
dB
RLin
9.9
11.8
dB
RLout
10.8
16.4
dB
IRev
25.2
20.2
dB
Input P1dB
IP1dB
-7.2
-2.9
dBm
Output P1dB
OP1dB
7.9
9.9
dBm
Input IP3
IIP3
10.0
12.9
dBm
Output IP3
OIP3
26.0
26.8
dBm
Input Return Loss
Output Return Loss
Reverse Isolation
Stability
k
Technical Report TR1108, Rev. 1.0
--
>1
5 / 17
Note/Test Condition
SMA and PCB losses substracted
f1=431 MHz, Δf=1 MHz, Pin= -25 dBm
f1=768 MHz, Δf=1 MHz, Pin= -25 dBm
Stability measured from 10MHz to
10GHz
2012-07-17
BFR380F
High Linearity LNA for ISDB-T Application
Description
3
Description
This report presents the measurement results of BFR380F as low noise amplifier for ISDB-T
application.
ISDB-T (Integrated Services Digital Broadcasting) is the Japanese digital video and audio
broadcasting standard. It adopts the frequency range of 430MHz to 770MHz in the UHF
(Ultra-high Frequency) band.
In this application note, the BFR380F is used to design an application circuit with
requirements of Supply voltage Vcc < 5V, Supply current Icc < 25mA, Noise Figure NF < 2
dB, and Input Third Order Intercept Point (IIP3) of +10dBm.
The circuit as shown in Figure 1 has achieved input and output matching of over 10dB, gain
of 13.8-16.0dB, and reverse isolation of >25dB in the 430-770MHz band. The noise figure is
1.4 - 1.6dB. This circuit is unconditionally stable from 10MHz to 10GHz.
At the frequency of 430 MHz, using two tones spaced of 1MHz, the input third intercept point
reaches +10.0dBm. Besides, the measured input 1dB compression point is -7.2 dBm. At the
frequency of 770MHz, the input third intercept point is +12.9dBm, and input 1dB compression
point is -2.9dBm.
Technical Report TR1108, Rev. 1.0
6 / 17
2012-07-17
BFR380F
High Linearity LNA for ISDB-T Application
Schematics
4
Schematics
Figure 1
Schematic Diagram of the used Circuit
Table 2
Symbol
Bill-of-Materials
Value
Unit
Size
Manufacturer
Comment
C1
100
pF
0402
Various
Input DC block, input matching
C2
330
pF
0402
Various
Output DC block, output matching
C3
100
nF
0402
Various
RF decoupling / blocking cap
C4
100
nF
0402
Various
C5
330
pF
0402
Various
RF decoupling / blocking cap
Negative feedback
L1
27
nH
0402
LQG series
Input matching and bias to the Base
L2
24
nH
0402
LQG series
R1
18
kΩ
0402
Various
Output matching and bias to the
Collector
Base biasing
R2
22
Ω
0402
Various
R3
33
Ω
0402
Various
R4
560
Ω
0402
Various
DC biasing
DC biasing (provides DC negative
feedback to stabilize DC operating
point over temperature variation,
transistor hFE variation, etc.)
Negative feedback
Q1
BFR380F
Infineon Technologies
Silicon RF Transistor
Technical Report TR1108, Rev. 1.0
TSFP3
7 / 17
2012-07-17
BFR380F
High Linearity LNA for ISDB-T Application
Measured Graphs
5
Measured Graphs
Insertion Power Gain InBand
20
15
430 MHz
16.1 dB
10
770 MHz
13.9 dB
5
0
100
300
500
700
900
Frequency (MHz)
Figure 2
Insertion Power Gain of the 430-770 MHz ISDB-T LNA using BFR380F
Reverse Isolation
-15
430 MHz
-25.2 dB
-20
770 MHz
-20.2 dB
-25
-30
-35
100
300
500
700
900
Frequency (MHz)
Figure 3
Reverse Isolation of the the 430-770 MHz ISDB-T LNA using BFR380F
Technical Report TR1108, Rev. 1.0
8 / 17
2012-07-17
BFR380F
High Linearity LNA for ISDB-T Application
Measured Graphs
Noise Figure
2.2
2
430 MHz
1.586 dB
NF(dB)
1.8
770 MHz
1.406 dB
1.6
1.4
1.2
1
400
500
600
700
800
900
Frequency (MHz)
Figure 4
Noise Figure of the the 430-770 MHz ISDB-T LNA using BFR380F
Input 1dB Compression Point at 430MHz
20
Gain(dB)
15
-20.0
16.0
-7.2
15.0
10
5
0
-20
-15
-10
-5
0
Pin [dBm]
Figure 5
Input 1dB compression point of the ISDB-T LNA using BFR380F at 430MHz
Technical Report TR1108, Rev. 1.0
9 / 17
2012-07-17
BFR380F
High Linearity LNA for ISDB-T Application
Measured Graphs
Input 1dB Compression Point at 770MHz
20
Gain(dB)
15
-20.0
13.8
10
-2.9
12.8
5
0
-20
-15
-10
-5
0
Pin [dBm]
Figure 6
Input 1dB compression point of the ISDB-T LNA using BFR380F at 770MHz
Input Matching
0
-5
430 MHz
-9.9 dB
770 MHz
-11.8 dB
-10
-15
100
Figure 7
200
300
400
500
600
Frequency (MHz)
700
800
900
Input Matching of the 430-770 MHz ISDB-T LNA using BFR380F
Technical Report TR1108, Rev. 1.0
10 / 17
2012-07-17
BFR380F
High Linearity LNA for ISDB-T Application
Measured Graphs
Swp Max
900MHz
2.
0
0.
6
0.8
1.0
Input Matching Smith
430 MHz
r 0.555834
x 0.234667
3.
0
4.
0
0.
4
5.
0
10.0
5.0
4.0
3.0
2.0
1.0
0.8
0.6
0.4
0
10.0
0
.2
.0
.0
.0
Figure 8
-1.0
-0.8
-0
.6
-2
.0
-3
.4
-4
-0
-5
-0
-10.
2
0.2
0.
770 MHz
r 0.636498
x 0.218373
Swp Min
100MHz
Input Matching of the 430-770 MHz ISDB-T LNA using BFR380F (Smith Chart)
Output Matching
-5
430 MHz
-10.8 dB
-10
770 MHz
-16.4 dB
-15
-20
100
Figure 9
300
500
Frequency (MHz)
700
900
Output Matching of the 430-770 MHz ISDB-T LNA using BFR380F
Technical Report TR1108, Rev. 1.0
11 / 17
2012-07-17
BFR380F
High Linearity LNA for ISDB-T Application
Measured Graphs
Swp Max
900MHz
2.
0
0.
6
0.8
1.0
Output Matching Smith
3.
0
5.
10.0
5.0
4.0
2
0
.2
.0
.0
.0
Figure 10
-1.0
-0.8
-0
.6
-2
.0
-3
.4
-4
-0
-5
-0
0
10.0
3.0
1.0
0.8
0.6
0.4
0.
0.2
4.
770 MHz
r 0.923856
x 0.282355
2.0
4
0
0
-10.
0.
430 MHz
r 0.601818
x 0.236924
Swp Min
100MHz
Output Matching of the 430-770 MHz ISDB-T LNA using BFR380F (Smith Chart)
Stability k Factor
5
4
3
2
2089.2 MHz
1.055
1
0
10
Figure 11
2010
4010
6010
Frequency (MHz)
8010
10000
Wideband Stability K Factor of the 430-770 MHz ISDB-T LNA using BFR380F
Technical Report TR1108, Rev. 1.0
12 / 17
2012-07-17
BFR380F
High Linearity LNA for ISDB-T Application
Measured Graphs
Stability Mu Factor
2
1.5
1
0.5
MU1()
MU2()
0
10
2010
4010
6010
8010
10000
Frequency (MHz)
Figure 12
Wideband Stability Mu Factor of the 430-770 MHz ISDB-T LNA using BFR380F
Output 3rd Order Intercept Point 431MHz
0
431 MHz
-9.3
Power (dBm)
-20
-40
430 MHz
-79.9
-60
-80
-100
429
430
431
432
433
434
Frequency (MHz)
Figure 13
rd
Output 3 Order Intercept Point of the ISDB-T LNA using BFR380F at 431MHz
Technical Report TR1108, Rev. 1.0
13 / 17
2012-07-17
BFR380F
High Linearity LNA for ISDB-T Application
Measured Graphs
Output 3rd Order Intercept Point 768MHz
0
768.0 MHz
-11.5
Power (dBm)
-20
-40
-60
767.0 MHz
-88.0
-80
-100
766
Figure 14
767
768
769
Frequency (MHz)
770
771
rd
Output 3 Order Intercept Point of the ISDB-T LNA using BFR380F at 768MHz
Technical Report TR1108, Rev. 1.0
14 / 17
2012-07-17
BFR380F
High Linearity LNA for ISDB-T Application
Evaluation Board and Layout Information
6
Evaluation Board and Layout Information
Figure 15
Photo of the BFR380F circuit on the Evaluation Board (PCB Marking M111118)
Vias
FR4 Core, 0.2mm
Copper
35µm
Figure 16
FR4 Prepreg,
0.8mm
PCB Layer Information
Technical Report TR1108, Rev. 1.0
15 / 17
2012-07-17
BFR380F
High Linearity LNA for ISDB-T Application
Authors
7
Authors
Xiang Li , Application Engineer of Business Unit “RF and Protection Devices”
Dr. Chih-I Lin, Senior Staff Engineer/Technical Marketing RF of Business Unit “RF and
Protection Devices”
Technical Report TR1108, Rev. 1.0
16 / 17
2012-07-17
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Published by Infineon Technologies AG
TR1108