BAR90-02LRH PIN Diode Switch using BAR90 for 2.4-2.5 GHz WLAN/WiMAX Applications Technical Report TR137 Revision: Version 1.0 Date: RF and Protection Devices
Edition Published by Infineon Technologies AG 81726 Munich, Germany 2009 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights of any third party. Information For further information on technology, delivery terms and conditions and prices, please contact the nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements, components may contain dangerous substances. For information on the types in question, please contact the nearest Infineon Technologies Office. Infineon Technologies components may be used in life-support devices or systems only with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered.
TR137 Revision History: Previous Revision: Page Technical Report 3 / 11
1 Overview Device : Application: BAR90-02LRHRH 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. Technical Report 4 / 11
3 Summary of Measurement Results Table 1 Summary of Measurement Results for the BAR90 in TSLP2 Parameter Symbol Value Unit Note/Test Condition Frequency Range Freq 2.4-2.5 GHz DC Voltage Vcc 0 3.3 V DC Current Icc 0 9 ma Please refer to Table 3 Mode ANT-RX ANT-TX Insertion Loss IR 0.6 0.9 db Isolation Tx/Rx IS TX 23.9 29.7 db Isolation Rx/ANT IS RA 30.3 db Isolation Tx/ANT IS TA 24.4 db Return Loss Rx RL RX 16.8 0.26 db Return Loss Tx RL TX 0.12 14.9 db Return Loss ANT RL A 17.3 17.2 db Output IP3 O ip3 > 45 dbm Intermodulation Distance IMD3 Input 0.1dB Compression IMD3 I p0.1db > 80 > 30 dbc dbm Measured @ Pin=15dBm Table 2 Summary of Switching characteristics Results for the BAR90 in TSLP2 (Measured @ Pin=15dBm) Parameter Symbol Value Unit Note/Test Condition Setting Time Ts on 75 ns ANT-RX to ANT-TX Setting Time Ts off 280 ns ANT-TX to ANT-RX Rise Time Tr on 165 ns ANT-RX to ANT-TX Fall Time Tf off 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. Technical Report 5 / 11
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 Comment C1 2.7 pf 0402 Various 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 Resonance circuit@2.45ghz/ can be replaced by a jumper for worse isolation@tx-ant mode R1 180 Ω 0402 Various DC Bias R2 270 Ω 0402 Various Diode Voltage settings TX1 5 mm 0402 Mircrostrip Line Rf track length improved for better Isolation 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) Technical Report 6 / 11
5 Measured Graphs 5.1 Measurement for ANT-RX Mode 0-10 Port Return Loss -0.1227 db -20-30 -40-17.29 db -16.76 db RX TX ANT -50 2000 2200 2400 2600 2800 3000 Frequency (MHz) Figure 5-1: Port return loss of the BAR90-02LRH PIN diode switch for ANT-RX mode 0 Port Transmission and Isolation RX->ANT TX->ANT -10-0.6007 db -23.91 db TX->RX -20-30 -24.38 db -40 2000 2200 2400 2600 2800 3000 Frequency (MHz) Figure 5-2: Transmission/Isolation of the BAR90-02LRH PIN diode switch for ANT-RX mode. Technical Report 7 / 11
5.1.1 Measurement for ANT-TX Mode : 0-10 -14.89 db Port Return Loss -0.2633 db -20-30 -40-17.21 db RX TX ANT -50 2000 2200 2400 2600 2800 3000 Frequency (MHz) Figure 5-3: Port return loss the BAR90-02LRH PIN diode switch for ANT-TX mode 0-10 Port Transmission and Isolation -0.8945 db RX->ANT TX->ANT TX->RX -20-29.65 db -30-30.25 db -40 2000 2200 2400 2600 2800 3000 Frequency (MHz) Figure 5-4: Transmission/Isolation of the BAR90-02LRH PIN diode switch for ANT-TX mode. Technical Report 8 / 11
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. Technical Report 9 / 11
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 Technical Report 10 / 11
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