GaN vs GaAs-Difference between GaN and GaAs
The table-1 below compares GaN vs GaAs and describes difference between GaN and GaAs materials.
|Full form||Gallium Nitride||Gallium Arsenide|
|Power Density (Output)||4 to 8 Wattt/mm||0.5 to 1.5 Watt/mm|
|Operating Voltage||28 to 48 Volt||5 to 20 Volt|
|Breakdown voltage||> 100 Volt||20 to 40 Volt|
|Current (Maximum)||About 1 Ampere/mm||About 0.5 Ampere/mm|
|Thermal Conductivity||390 (z), 490 (SiC)||47|
|Radiation Resistant performance||Better||Lesser|
Following are the derivations from Table-1 above.
➨GaN has higher breakdown voltage as well as higher power densities in comparison to GaAs and Si.
➨GaN is better in radiation resistant compare to GaAs and hence used in space applications.
➨GaN ideal for smaller devices due to high power densities due to reduction capacitance value.
➨With GaN high impedances and wider bandwidths can be achieved.
➨GaN results into smaller size and lesser cost.
➨GaN based devices require less cooling and are light in weight.
GaN Power Amplifier vs GaAs Power Amplifier - Difference between GaN Power Amplifier and GaAs Power Amplifier
The table-2 below compares GaN Power Amplifier vs GaAs Power Amplifier mentions difference between GaN Power Amplifier and GaAs Power Amplifier.
|Parameter||GaN Power Amplifier||GaAs Power Amplifier|
|Spectral Regrowth for 400W SSPA Ku band frequency for operating power of 55 dBm||-30.3 dBc||-28.6 dBc|
|TOI (Third Order Intermodulation) with operating power of 52 dBm||-31.63 dBc||-27.50 dBc|
|AM/PM Conversion||1.5o/dB (at 55dBm operating power), 0.5o/dB (at 52dBm operating power)||2.5o/dB (at 55dBm operating power), 1.0o/dB (at 52dBm operating power)|
|Volume||29 dm3||142 dm3|
|Energy consumption||2200 Watt||3500 Watt|
Following are the derivations from Table-2 above. The results are derived from research conducted by Advantech Wireless Inc.
For more information one can reach Website www.advantechwireless.com.
➨GaN power amplifier(SSPA) perform better by 2dB compare to GaAs power amplifier(400W SSPA Ku band).
➨TOI performance of GaN is better by approx. 1 dB compare to GaAs SSPA of same specification.
➨AM/PM is better i.e. less distortion for GaN Power Amplifier compare to GaAs Power Amplifier.
➨Weight, Volume (i.e. size) and energy consumption of GaN power amplifier is far better compare to GaAs power amplifier.
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