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. 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). 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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 3 / 11 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. Technical Report 4 / 11 29.07.2009 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. Technical Report 5 / 11 29.07.2009 Technical Report TR137 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 isolation@TX-ANT 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) Technical Report 6 / 11 29.07.2009 Technical Report TR137 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. Technical Report 7 / 11 29.07.2009 Technical Report TR137 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. Technical Report 8 / 11 29.07.2009 Technical Report TR137 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. Technical Report 9 / 11 29.07.2009 Technical Report TR137 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 Technical Report 10 / 11 29.07.2009 w w w . i n f i n e o n . c o m Published by Infineon Technologies AG TR137