RFHIC Introduces High Efficiency GaN Pallet Amp
New GaN solution for LTE/WCDMA RRH with variable output power optimized for DPD interlocking. March
11, 2010 - RFHIC Corporation, manufacturer of active RF & MW components and hybrids with a heavy focus on GaN
technology, has released GaN pallet amplifier for LTE/WCDMA RRH system,
RTP-21010. This amplifier, when combined with DPD, produces over 40% efficiency at whole frequency band of
2100 MHz~2180 MHz, 45 dB gain and 10 W at LTE/WCDMA 4channel at 28 V. This amplifier has been developed based on
internally matched GaN on SiC device and Doherty technology.
RTP-21010 has built-in DC/DC function, isolator, coupler, thermo pad and connectors all within 2.4 in(w) * 4.5
in(L) * 0.86 in(H) physical size. This small amplifier produces different output power according to input voltage,
10W@28V, 16 W@36 V, 20 W@47 V.
Samuel Cho, Chief Technical Officer, RFHIC Corporation, commented: "The Doherty amplifiers based on LDMOS showing
irregular efficiency at 80 MHz bandwidth have to have various models that correspond various systems due to
different requirement on ACPR when power level is lower than 10. Besides, LDMOS have low efficiency about 20%~24%
even with DPD interlocking and the size is big.
RTP-21010 is free from all above problems LDMOS solutions are facing." And he added: "The barrier to
telecommunication market for GaN has been always the cost. RFHIC has endeavored to cut down the cost of GaN
amplifier by taking almost all the processes in RFHIC for GaN transistor with die supplied by Cree, and using most
of RF components for a pallet from RFHIC.
Cost reduction enables GaN solution available for telecom
application RRH, and small size of devices and heat-sink attributes to highly improved efficiency. The
RTP-21010 is applicable to RRH, BTS and Repeater with 80 MHz bandwidth coverage and various outputs from 35
dBm to 40 dBm under condition of LTE/WCDMA 1 channel to 6 channels.