Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
?
EE Times-Asia > RF/Microwave
?
?
RF/Microwave??

Pre-driver PAs power cellular base stations

Posted: 21 Mar 2005 ?? ?Print Version ?Bookmark and Share

Keywords:rf micro devices? rfmd? gallium arsenide heterojunction bipolar transistor? gaas hbt? pre-driver power amplifier?

paCE="7" ALIGN="RIGHT">

RF Micro Devices Inc. (RFMD) announced two new gallium arsenide heterojunction bipolar transistor (GaAs HBT) pre-driver power amplifiers (PAs) for cellular base station applications. The half-watt rf3807 and two-watt rf3809 single-stage devices operate across CDMA, GSM, DCS, PCS and UMTS frequencies and are designed to lower the total cost of implementation for manufacturers of cellular base stations.

The RF3807 and RF3809 feature high linearity (better than 42dBm, UMTS), high power-added efficiency (better than 40 percent, P1dB) and broadband (450MHz to 2,200MHz) performance, providing functionality for a variety of wireless applications.

When operating in the UMTS frequency band, the RF3807 driver amplifier provides 28.5dBm output power at 1dB compression (OP1dB), 40 percent power efficiency at OP1dB, a 42dBm output third-order intercept point [OIP3]), and 14.5dB gain under linear operation. The RF3807 obtains -60dBc adjacent channel power ratio (ACPR) at 17dBm output power (test condition: ACPR measured at 5MHz offset, W-CDMA modulation, 64 channel base station forward link).

When operating in the UMTS frequency band, the RF3809 driver amplifier provides 33.5dBm OP1dB, 43 percent power efficiency at OP1dB, 43dBm OIP3 and 10.5-dB gain under linear operation. The RF3809 obtains -60dBc ACPR at 20dBm output power (test condition: ACPR measured at 5MHz offset, WCDMA modulation, 64 channel base station forward link).

The plastic-packaged RF3807 and RF3809 GaAs HBT pre-driver power amplifiers are designed to deliver a low-cost multiband (450MHz to 2,200MHz) option for applications with power output requirements that are less than two-watts (P1dB). For applications requiring driver amplifiers with power output requirements that are greater than two-watts (P1dB), the company offers the RF3800 series.

The RF3807 and RF3809 are priced at $4.07 in quantities of 10,000 units. Currently being sampled, volume production to begin Q2 2005.

- Janine Love
eeProductCenter




Article Comments - Pre-driver PAs power cellular base s...
Comments:??
*? You can enter [0] more charecters.
*Verify code:
?
?
Webinars

Seminars

Visit Asia Webinars to learn about the latest in technology and get practical design tips.

?
?
Back to Top