BAR90 PIN Diode Switch WLAN WiMax 2G5

BAR9 0-0 2 LRH
PI N Diod e Switch us ing BAR9 0 fo r
2.4 - 2. 5 GHz W LAN/Wi M AX
Applic atio ns
Technic al Rep ort T R 137
Revision: Version 1.0
Date: 29.07.2009
RF and Protecti on Devi c es
Edition 29.07.2009
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2009 Infineon Technologies AG
All Rights Reserved.
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Technical Report TR137
PIN Diode Switch using BAR90 for 2.4 - 2.5 GHz WLAN/WiMAX Applications
TR137
Revision History: 29.07.2009
Previous Revision:
Page
Technical Report
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29.07.2009
Technical Report TR137
PIN Diode Switch using BAR90 for 2.4 - 2.5 GHz WLAN/WiMAX Applications
1
Overview
Device :
BAR90-02LRHRH
Application:
PIN Diode Switch using BAR90 for 2.4 - 2.5 GHz WLAN/WiMAX
Applications
PCB Marking: BAR90 Pin diode switch 2.45GHz
2
Description
This Technical Report presents the measurement results of the PIN-diode switch for
2.4 – 2.5 GHz WLAN and WiMAX applications.
This PIN-diode switch uses two BAR90-02LRH diodes in the TSLP2 package. We
obtain an insertion loss of 0.6dB/0.9dB (referred to Table 1) in either Tx mode and Rx mode.
However, the isolation provided by the switch with TSLP2 package is at least -23.9dB (results
observed in the Rx-ANT mode between the Tx port and the Rx port).
The Input and output of the BAR90-02LRH PIN diode switch are matched to 50Ω with
a minimum return loss of -14.9dB in the Tx-ANT mode and -16.8dB in the Rx-ANT mode.
The Actual BAR90-02LRH Pin diode switch presents a very good linearity. By inserting
an input power of 15dBm, the Output IP3 is better than 45dBm. The input compression point
at 0.1dB is located at more than 30dBm.
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Technical Report TR137
PIN Diode Switch using BAR90 for 2.4 - 2.5 GHz WLAN/WiMAX Applications
3
Summary of Measurement Results
Table 1
Summary of Measurement Results for the BAR90 in TSLP2
Parameter
Symbol
Value
Unit
Frequency Range
Freq
2.4-2.5
GHz
DC Voltage
Vcc
0
3.3
V
DC Current
Icc
0
9
mA
ANT-RX
ANT-TX
Mode
Insertion Loss
IR
0.6
0.9
dB
Isolation Tx/Rx
ISTX
23.9
29.7
dB
Isolation Rx/ANT
ISRA
30.3
dB
Isolation Tx/ANT
ISTA
24.4
Return Loss Rx
RLRX
16.8
0.26
dB
Return Loss Tx
RLTX
0.12
14.9
dB
Return Loss ANT
RLA
17.3
17.2
dB
Output IP3
Oip3
Intermodulation
Distance IMD3
IMD3
Input 0.1dB
Compression
Ip0.1dB
Table 2
Note/Test Condition
Please refer to Table 3
dB
> 45
dBm
> 80
dBc
> 30
Measured @ Pin=15dBm
dBm
Summary of Switching characteristics Results for the BAR90 in TSLP2
(Measured @ Pin=15dBm)
Parameter
Symbol
Value
Unit
Note/Test Condition
Setting Time
Tson
75
ns
ANT-RX to ANT-TX
Setting Time
Tsoff
280
ns
ANT-TX to ANT-RX
Rise Time
Tron
165
ns
ANT-RX to ANT-TX
Fall Time
Tfoff
90
ns
ANT-TX to ANT-RX
Note:
Setting Time: Response delay after DC power supply Vdd switches on/off.
Rise/Fall Time: Transition time of RF power change from 10% to 90% or vise versa.
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PIN Diode Switch using BAR90 for 2.4 - 2.5 GHz WLAN/WiMAX Applications
4
Schematics
4.1
Schematic of the switch 2.45GHz using BAR90 TSLP2 package
Figure 4-1: Schematic of the PIN Diode Switch using BAR90-02LRH (TSLP2)
Table 3
Bill-of-Materials
Symbol
Value
Unit
Size
Manufacturer
C1
2.7
pF
0402
Various
Comment
Input Matching for Tx port
C2
1
nF
0402
Various
HF ground
C3
1.7
pF
0402
Various
Output/Input Matching for Antenna
C4
1.9
pF
0402
Various
Resonance circuit @2.45GHz
C5
2.2
pF
0402
Various
Output Matching for Rx port
L1
56
nH
0402
Murata LQG15HS
DC Feed for Diodes
L2
24
nH
0402
Murata LQG15HS
R1
180
Ω
0402
Various
Resonance [email protected]/ can be replaced
by a jumper for worse [email protected] mode
DC Bias
R2
270
Ω
0402
Various
TX1
5
mm
0402
Mircrostrip Line
Rf track length improved for better Isolation
Diode Voltage settings
TX2
8
mm
0402
Mircrostrip Line
RF track length improved for ANT Matching
TX3
9
mm
0402
Mircrostrip Line
λ/4 track improved for better results
D1
0402
Infineon Technologies Silicon PIN diode BAR90-02LRH(TSLP2)
D2
0402
Infineon Technologies Silicon PIN diode BAR90-02LRH(TSLP2)
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PIN Diode Switch using BAR90 for 2.4 - 2.5 GHz WLAN/WiMAX Applications
5
Measured Graphs
5.1
Measurement for ANT-RX Mode
Port Return Loss
0
2450 MHz
-0.1227 dB
-10
2450 MHz
-16.76 dB
-20
RX
2450 MHz
-17.29 dB
-30
TX
-40
ANT
-50
2000
2200
2400
2600
Frequency (MHz)
2800
3000
Figure 5-1: Port return loss of the BAR90-02LRH PIN diode switch for ANT-RX mode
RX->ANT
Port Transmission and Isolation
0
TX->ANT
2450 MHz
-0.6007 dB
-10
TX->RX
2450 MHz
-23.91 dB
-20
-30
-40
2000
2450 MHz
-24.38 dB
2200
2400
2600
Frequency (MHz)
2800
3000
Figure 5-2: Transmission/Isolation of the BAR90-02LRH PIN diode switch for ANT-RX mode.
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PIN Diode Switch using BAR90 for 2.4 - 2.5 GHz WLAN/WiMAX Applications
5.1.1
Measurement for ANT-TX Mode :
Port Return Loss
0
-10
2450 MHz
-0.2633 dB
2450 MHz
-14.89 dB
-20
RX
2450 MHz
-17.21 dB
-30
TX
-40
ANT
-50
2000
2200
2400
2600
Frequency (MHz)
2800
3000
Figure 5-3: Port return loss the BAR90-02LRH PIN diode switch for ANT-TX mode
RX->ANT
Port Transmission and Isolation
0
TX->ANT
2450 MHz
-0.8945 dB
-10
TX->RX
2450 MHz
-29.65 dB
-20
-30
2450 MHz
-30.25 dB
-40
2000
2200
2400
2600
Frequency (MHz)
2800
3000
Figure 5-4: Transmission/Isolation of the BAR90-02LRH PIN diode switch for ANT-TX mode.
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PIN Diode Switch using BAR90 for 2.4 - 2.5 GHz WLAN/WiMAX Applications
Figure 5-5: ANT-RX to ANT-TX switching time of the BAR90-02LRH PIN diode switch.
Figure 5-5: ANT-TX to ANT-RX switching time of the BAR90-02LRH PIN diode switch.
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PIN Diode Switch using BAR90 for 2.4 - 2.5 GHz WLAN/WiMAX Applications
6
Evaluation Board and layout Information
Figure 6-1: Layout of the BAR90-02LRH PIN diode Switch
Figure 6-2: PCB informaton of the BAR90-02LRH PIN diode Switch
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Published by Infineon Technologies AG
TR137