Application Note 2 NJG1126 W-LAN/WiMAX Application 2. 2.6GHz BAND APPLICATION 2-1 SUMMARY The characteristics of 2.6GHz band have evaluated as follows. The evaluation circuit structure and measured data are reviewed. 2-2-1 MEASURED DATA1 (DC) General conditions: VDD=VINV=2.85V, Ta=+25oC, Zs=Zl=50Ω Parameter Symbol Conditions Measurement Unit data Operating Voltage VDD 2.85 V Inverter Voltage VINV 2.85 V Control Voltage (High) VCTL(H) 1.85 V Control Voltage (Low) VCTL(L) 0 V Operating current IDD1 RF OFF, VCTL=1.85V 2.63 mA Operating current IDD2 RF OFF, VCTL=0V 0.03 uA Inverter current IINV1 RF OFF, VCTL=1.85V 98.1 uA Inverter current IINV2 RF OFF, VCTL=0V 18.1 uA Control current ICTL RF OFF, VCTL=1.85V 4.5 uA 1 Application Note 2 NJG1126 2-2-2 MEASURED DATA2 (LNA HIGH GAIN MODE) General conditions: VDD=VINV=2.7V, VCTL=1.85V, fRF=2585MHz, Ta=+25oC, Zs=Zl=50Ω with application circuit Measurement Parameter Symbol Conditions Unit data Operating current IDD Small signal gain Gain Noise figure Pin at 1dB compression point Input 3rd order intercept point NF RF OFF Exclude PCB/Connector losses (0.11dB) P-1dB(IN) IIP3 f1=fRF, f2=fRF+100kHz, Pin=-32dBm 2.47 mA 15.3 dB 1.65 dB -9.7 dBm +2.4 dBm RF Input port VSWR VSWRi 1.95 RF Output port VSWR VSWRo 1.53 2-2-3 MEASURED DATA3 (LNA LOW GAIN MODE) General conditions: VDD=VINV=2.7V, VCTL=0V, fRF=2585MHz, Ta=+25oC, Zs=Zl=50Ω with application circuit Measurement Parameter Symbol Conditions data Small signal gain Noise figure Pin at 1dB compression point Input 3rd order intercept point Gain NF Exclude PCB/Connector losses (0.11dB) P-1dB(IN) IIP3 f1=fRF, f2=fRF+100kHz, Pin=-16dBm Unit -7.0 dB 7.0 dB +11.0 dBm +14.8 dBm RF Input port VSWR VSWRi 1.12 RF Output port VSWR VSWRo 1.38 2 Application Note 2 NJG1126 2-3 APPLICATION CIRCUIT (Top View) RF IN L2 1.5nH 4 GND RFIN 5 C1 5pF L4 8.2nH RFOUT RF OUT 3 L3 6.2nH L1 3nH VDD=2.7V GND GND 6 2 C2 1000pF Bias Circuit VCTL=0V or 1.85V VCTL 7 Logic Circuit VINV VINV=2.7V 1 C3 1000pF 8 GND 1 Pin INDEX 2-4 PCB DESIGN (Top View) Parts List Parts ID L1~L4 VDD C1~C3 Comment TAIYO-YUDEN (HK1005 Series) MURATA (GRM15 Series) C2 RF IN L3 L1 L2 L4 C1 RF OUT C3 VCTL VINV PCB (FR-4): t=0.2mm MICROSTRIP LINE WIDTH =0.4mm (Z0=50Ω) PCB SIZE=17.0mm x 17.0mm 3 Application Note 2 NJG1126 2-5-1 TYPICAL CHARACTERISTICS (LNA HIGH GAIN MODE) Condition: Ta=+25oC, VDD=VINV=2.7V, VCTL=1.85V, Zs=Zl=50Ω NJG1126HB6 @High Gain Gain, IDD vs. Pin NJG1126HB6 @High Gain Pout vs. Pin (f=2585MHz) (f=2585MHz) 10 20 5 18 7 6 Gain -5 -10 -15 P-1dB(IN)=-9.7dBm -10 0 12 3 10 2 P-1dB(IN)=-9.7dBm 6 -40 10 0 -30 -20 -40 -60 12 22 10 8 OIP3 18 6 16 4 14 2 IIP3 12 IM3 IIP3=+2.4dBm -30 24 20 OIP3 (dBm) Pout, IM3 (dBm) Pout -80 -20 -10 10 0 8 2.56 10 2.57 2.58 2.6 2.61 -4 2.62 NJG1126HB6 @High Gain k factor vs. frequency (f=2.5~2.7GHz) (f=50M~20GHz) 20 (Exclude PCB, Connector Losses) 3.5 3 15 2.5 k factor Noise Figure (dB) 2.59 frequency (GHz) NJG1126HB6 @High Gain NF vs. frequency 2 0 -2 Pin (dBm) 4 10 (f1=2.56~2.62GHz, f2=f1+100kHz, Pin=-32dBm) (f1=2585MHz, f2=f1+100kHz) -20 -100 -40 0 NJG1126HB6 @High Gain OIP3, IIP3 vs. frequency NJG1126HB6 @High Gain Pout, IM3 vs. Pin 0 -10 Pin (dBm) Pin (dBm) 20 1 IIP3 (dBm) -20 4 IDD 8 -20 -30 14 IDD (mA) Gain (dB) Pout (dBm) Pout -25 -40 5 16 0 NF 1.5 1 10 5 0.5 0 2.5 0 2.55 2.6 frequency (GHz) 2.65 2.7 0 5 10 15 20 frequency (GHz) 4 Application Note 2 NJG1126 2-5-2 TYPICAL CHARACTERISTICS (LNA HIGH GAIN MODE) Condition: Ta=+25oC, VDD=VINV=2.7V, VCTL=1.85V, Zs=Zl=50Ω S11, S22 S21, S12 VSWR Zin, Zout S11, S22 (f=50MHz ~ 20GHz) S21, S12 (f=50MHz ~ 20GHz) 5 Application Note 2 NJG1126 2-5-3 TYPICAL CHARACTERISTICS (LNA LOW GAIN MODE) Condition: Ta=+25oC, VDD=VINV=2.7V, VCTL=0V, Zs=Zl=50Ω NJG1126HB6 @Low Gain Pout vs. Pin (f=2585MHz) (f=2585MHz) -4 -6 -10 -8 40 -10 30 Pout -20 -30 -50 -40 50 Gain IDD -12 P-1dB(IN)=+11.0dBm -30 -20 -10 0 -14 10 -20 -10 0 (f1=2585MHz, f2=f1+100kHz) (f1=2.56~2.62GHz, f2=f1+100kHz, Pin=-16dBm) 0 10 OIP3 (dBm) 12 Pout -40 -60 24 22 OIP3 8 20 6 18 4 16 2 IIP3 IM3 IIP3=+14.8dBm -30 -20 -10 0 10 0 -2 2.56 20 14 12 2.57 2.58 Pin (dBm) 2.59 2.6 2.61 10 2.62 frequency (GHz) NJG1126HB6 @Low Gain NF vs. frequency NJG1126HB6 @Low Gain k factor vs. frequency (f=2.5~2.7GHz) (f=50M~20GHz) 12 20 (Exclude PCB, Connector Losses) 11 10 15 9 k factor Noise Figure (dB) 20 NJG1126HB6 @Low Gain OIP3, IIP3 vs. frequency 20 -100 -40 10 Pin (dBm) NJG1126HB6 @Low Gain Pout, IM3 vs. Pin -80 10 0 -30 Pin (dBm) -20 20 P-1dB(IN)=+11.0dBm -16 -40 20 IDD (uA) Gain (dB) 0 -40 Pout, IM3 (dBm) 60 IIP3 (dBm) 10 Pout (dBm) NJG1126HB6 @Low Gain Gain, IDD vs. Pin 8 NF 7 6 10 5 5 4 2.5 0 2.55 2.6 frequency (GHz) 2.65 2.7 0 5 10 15 20 frequency (GHz) 6 Application Note 2 NJG1126 2-5-4 TYPICAL CHARACTERISTICS (LNA LOW GAIN MODE) Condition: Ta=+25oC, VDD=VINV=2.7V, VCTL=0V, Zs=Zl=50Ω S11, S22 S21, S12 VSWR Zin, Zout S11, S22 (f=50MHz ~ 20GHz) S21, S12 (f=50MHz ~ 20GHz) 7