The new Airfast™ transistors by freescale are engineered to boost the efficiency, peak power and signal bandwidth of next-generation base stations. The cost-effective, small-configuration of the Airfast RF transistors are designed to help network equipment manufacturers and operators support multiple wireless standards, manage escalating data transmission rates and keep capital and operating costs low.
“The newest additions to Freescale’s Airfast portfolio of RF power solutions deliver substantial leaps forward in linear efficiency and higher power for small cell and macrocell base stations,” said Ritu Favre, vice president and general manager of Freescale’s RF Division. “As the long-time leader in this market and a pioneer in LDMOS technology, Freescale offers customers a broad selection of RF transistors that advance power amplifier performance while reducing cost and design cycles.”
Airfast RF power solutions
The AFT09S282Nis Freescale’s 900 MHz, 28V LDMOS product. The device offers state-of-the-art RF performance from 720-960 MHz and delivers the highest peak power in OMNI plastic over-molded packaging available on the market (490W load pull peak power).
The AFT18S230Sis a 1.8 GHz, 28V RF power LDMOS transistor that delivers a symmetric Doherty efficiency of 45 percent and 17 dB of gain at 8 dB OBO. This represents a level of efficiency typically achieved by more complex and expensive solutions employing asymmetric-only Doherty techniques. The device, when used in asymmetric Doherty PA’s, is designed to deliver even higher-efficiency performance.
The AFT21S230Sis a 2.1 GHz 28V device delivering outstanding efficiency for a 230W-rated RF power LDMOS transistor. Housed in NI-780S-6 packaging for VBW up to 100 MHz, the product is designed for use in either symmetric or asymmetric Doherty applications. In symmetric deployment the product is engineered to deliver 45 percent efficiency at 8 dB OBO and 15.5 dB of gain.
The AFT18HW355Sis an in-package Doherty device for high-power PCS- and DCS-band applications. Delivering 56 dBm of peak power in a single device with efficiency exceeding 48 percent at average power 8 dB OBO, the product offers performance that rivals much more expensive GaN-based solutions. Capable of operating at either 1805-1880 MHz or 1930-1995 MHz, this compact device uses Freescale’s enhanced video bandwidth technology to enable full-band, multi-carrier operation.
To complement the new Airfast devices, Freescale is also announcing a new class of control products called advanced Doherty alignment modules (ADAM) that enables real-time adjustment of phase and amplitude for the optimization of traditional Doherty power amplifiers. The modules are designed to work with Airfast devices to boost overall system performance, including increased power efficiency, output power and linearity across the frequency band.
The MMDS25254H ADAM is a sophisticated gallium arsenide (GaAs) monolithic microwave integrated circuit (MMIC) that allows phase and peaking adjustments from 2300 to 2800 MHz. Product families for 700-1000 MHz and 1800-2200 MHz are also in development.
