MGA GHz 10W High Efficiency Linear Power Amplifier Product Data Sheet

Transcription

1 Features: 5 db Gain 4 dbm P- 3dB 33 dbm Linear 2.5% EVM (82. 64QAM) 25% Efficiency at 33 dbm Linear Output Power Fully Matched Input and Output for Easy Cascade + 28V Bias Voltage Surface Mount Package with RoHS Compliance MTTF > 85ºC ambient temperature Applications: 82.6d/e WiMax 82.b WLAN Point-To-Point Radio Applications Description: The MGA is a power amplifier with the State-of-the-Art linear power-added-efficiency between 2.4 GHz and 2.7 GHz frequency band. Based on advanced robust GaN device technology, the power-added-efficiency of this power amplifier is as high as 25% when it outputs 2W linear burst power with 2.5% EVM under the 82.6d/e 64QAM modulation schemes. The high efficiency linear power amplifier also has excellent reliability. Ideal applications include the driver and the output power stage of WiMax and WLAN infrastructures and access points. It also can be used for PTP (Point-To-Point) radio applications for this band. Typical RF Performance: Vds=28V,, Icq=8mA, Ta=25 ºC, Z=5 ohm Parameter Units Typical Data Frequency Range MHz Gain (Typ / Min) db 5 / 2 Gain Flatness (Typ / Max) +/-db. /.5 Input Return Loss db 8 Output Return Loss db 8 Output P3dB dbm 4 2.5% EVM dbm 33 Operating Current Range ma 5-4 Thermal Resistance C /W 5

2 Typical RF Performance: Vds=28.V, Icq=8mA, Z=5 ohm, Ta=25 ºC Gain(dB) MGA Gain Gain Freq(GHz) Return Loss(dB) MGA Return Loss Input Freq(GHz) Output 45 MGA Power(dBm) P- P-2 P Freq(GHz)

3 Typical RF Performance (Cont): Vds=28.V, Icq=8mA, Z=5 ohm, Ta=25 ºC MGA EVM and 2.4GHz MGA EVM and 2.7GHz EVM(%) EVM 5 Efficiency Channel Power(dBm) Efficiency(%) EVM(%) EV M 5 Ef f iciency Channel Power(dBm) Efficiency(%)

4 Absolute Maximum Ratings: (Ta= 25 C)* SYMBOL PARAMETERS UNITS ABSOLUTE MAXIMUM Vds Drain-Source Voltage V 5 Id Drain Current ma Ig Gate Current ma Pdiss DC Power Dissipation W 5 Pin max RF Input Power dbm +33 Tch Channel Temperature ºC 75 Tstg Storage Temperature ºC -55 to 5 *Operation of this device above any one of these parameters may cause permanent damage. Typical Scattering Parameters: Vds=28V, Icq=8mA,Z=5 ohm, Ta=25 ºC Freq(GHz) db(s) Ang(S) db(s2) Ang(S2) db(s2) Ang(S2) db(s22) Ang(S22)

5 Mechanical Information: This Package is RoHS compliant

6 Application Circuit: The evaluation board material, shown in Figure A, is Rogers 43 material, 2 mil thick. The RF trace weight is 2 oz. Through holes with a diameter of 2 mils are spread uniformly over the center paddle for thermal relief and ground. Via holes underneath the paddle are back filled with conductive epoxy. It is recommended that via holes be placed nearby the DC bias connector to maintain ground continuity between the top layer and bottom ground planes. Mounting holes near the unit will help secure the board to the chassis, minimize ground current loops and improve thermal conductivity in the absence of sweat soldering the board to the chassis. Figure A Evaluation Board Biasing with quarter-wave stubs at the gate and drain are shown in Figure A. The impedance of the quarter wave structures is cyclical with frequency. A RF short is observed at frequencies that are even multiples of a quarterwavelength and an open-impedance is observed at frequencies that are odd multiples of a quarter-wavelength. A 56 Ohm resistor is added in series to the gate bias. The effective impedance is increased which reduces the risk of oscillations. The 56 ohm resistor is not shown in Figure A. Through holes underneath the package is required to connect the top and bottom grounds and to improve thermal conductivity.

7 Application Notes: carriers, GHz, EVM=2.48% IEEE OFDM Frequency: 2.4 GHz Signal Level Setting: 7.2 dbm Ref. Level / Ext. A tt: 27.2 dbm / 7.2 db Sweep Mode: Continuous Trigger Mode: External Trigger O ffset: - µs Burst Type: OFDM DL Burst Modulation: ALL No Of Data Symbols: /2425 Result Summary No. of Bursts 7 Min Mean Limit Max Limit Unit EVM All Carriers % EVM Data Carriers % EVM Pilot Carriers % IQ Offset % Gain Imbalance % Q uadrature Error Center Frequency Error ± ± 92 Hz Clock Error ± ± 8 ppm Burst Power dbm Crest Factor db RSSI dbm RSSI Standard Deviation.52 db CINR db CINR Standard Deviation 2.97 db Running... Date: 5.DEC.28 :7:39

8 Application Notes (Cont): Typical ACPR response for % EVM, 2.4GHz IEEE OFDM Frequency: 2.4 GHz Signal Level Setting: 8.3 dbm Ref. Level / Ext. A tt: 9.8 dbm / 7.2 db Sweep Mode: C ontinuous Trigger Mode: External Trigger Offset: - µs Burst Type: OFDM DL Burst Modulation: ALL No Of Data Symbols: /2425 Spectrum Emission Mask Tx Channel: Bandwidth 3.5 MHz Power 3.92 dbm Start Freq. Rel. Stop Freq. Rel. RBW Freq. at? to Limit Pwr Abs Pwr Rel? to Limit MHz -7. MHz 3 khz GHz -4.4 dbm db db -7. MHz -3.7 MHz 3 khz GHz dbm db db -3.7 MHz -2.5 MHz 3 khz GHz dbm db -4.2 db -2.5 MHz -.75 MHz 3 khz GHz dbm db db.75 MHz 2.5 MHz 3 khz GHz dbm db db 2.5 MHz 3.7 MHz 3 khz GHz dbm db db 3.7 MHz 7. MHz 3 khz GHz dbm db db 7. MHz 8.75 MHz 3 khz GHz dbm db -5.7 db SpectrumMASK ETSI RBW 3 khz Marker dbm VBW Hz GHz Ref 9.8 dbm Att/EL 2. /. db SWT 5.7 s Sweep of 27 CHECK RESULT Pass Spect Mask dbr PK CLRWR B TRG LVL -33Spect Mask dbr MHz.75 MHz/div MHz Running... Date: 5.DEC.28 :8:3

9 Application Notes (Cont): carriers, GHz, EVM=2.48% IEEE OFDM Frequency: 2.7 GHz Signal Level Setting: 7.5 dbm Ref. Level / Ext. Att: 27.5 dbm / 7.2 db Sweep Mode: Continuous Trigger Mode: External Trigger O ffset: - µs Burst Type: OFDM DL Burst Modulation: ALL No O f Data Symbols: /2425 Result Summary No. of Bursts 7 Min Mean Limit Max Limit Unit EVM All Carriers % EVM Data Carriers % EVM Pilot Carriers % IQ Offset % Gain Imbalance % Q uadrature Error Center Frequency Error ± ± 26 Hz Clock Error.2 -. ± ± 8 ppm Burst Power dbm Crest Factor db RSSI dbm RSSI Standard Deviation.6 db CINR db CINR Standard Deviation 9.8 db Running... Date: 5.DEC.28 ::26

10 Application Notes (Cont): Typical constellation response for % EVM, 2.7GHz IEEE OFDM Frequency: 2.7 GHz Signal Level Setting: 7.5 dbm Ref. Level / Ext. A tt: 27.5 dbm / 7.2 db Sweep Mode: Continuous Trigger Mode: External Trigger O ffset: - µs Burst Type: OFDM DL Burst Modulation: ALL No O f Data Symbols: /2425 Capture Memory No of Samples 8 Time to Capture Buffer Start828. µs Capture Time 2 ms Gate Off Marker dbm Ref 27.5 dbm Att/El 2. / 5. dbburst 7 (7) s ms 2. ms/div 2. ms Constellation vs Symbol Marker Q uadrature Inphase A TRG LVL 7. B Running... Date: 5.DEC.28 :2:5