Power amps target Wi-Fi and WiMAX basestations

Edited by the Electronicstalk editorial team May 23, 2005

Microwave Technology has released two high linearity power amplifier (PA) products for 802.11 Wi-Fi and emerging 802.16 WiMAX basestation applications.

Microwave Technology has released two high linearity power amplifier (PA) products for 802.11 Wi-Fi and emerging 802.16 WiMAX basestation applications.

The first PA is the WPS-495922-02, which operates over a 4.9 to 5.9GHz bandwidth with 11dB gain and 32dBm output power at 1dB compression point.

Based on MwT's proprietary high linearity MESFET technology, the PA achieves superior error vector magnitude (EVM) performance of 2.5% at 26dBm output power level under WiMAX test signal (256 carriers and 64 QAM with 2/3 coding factor).

The EVM performance also includes 1.6% of accumulated errors from the modulator and driver stages.

The adjacent channel power ratio (ACPR) is less than -40dBc at 25dBm average output power and the third-order intercept point, IP3, is as high as 47dBm at 22dBm output power per tone.

WPS-495922-02 is pre-matched to 50ohm for easy cascading.

The PA is biased at 7.5V drain voltage and about 600mA direct current.

The WPS-495922-02 is packaged in MwT 02 package, a low-cost, surface-mount LLC package.

The package is lead-free and has a proprietary copper alloy based pallet for good thermal conductivity.

The second part is the WPS 2527LD5-98, which operates over a 2.5 to 2.7GHz band with 10dB gain and 37dBm output power at 1dB compression point.

The LDMOS based PA achieves high efficiency of 40% and superior EVM performance of 2.5% at 33dBm output power level under WiMAX test signal (256 carriers and 64 QAM with 2/3 coding factor).

The ACPR is less than -40dBc at 33dBm average output power and the third-order intercept point, IP3, is 50dBm at 33-dBm output power per tone.

WPS-2527LD5-98 is prematched to 50ohm with input and output load impedance then greater 10ohm.

The PA is biased with 26V of drain voltage and 100mA of quiescent direct current.

WPS-2527LD5-98 is packaged in an industry-standard metal flange package with excellent heatsinking properties.

Both devices are available from MRC Components.