A Highly Linear 17 to 24 GHz SMT Power Amplifier
Introduction to a new surface-mount technology-packaged power amplifier for wireless communications applications
A new surface-mount technology (SMT)-packaged power amplifier has been introduced for wireless communications applications, including millimeter-wave point-to-point radio, local multipoint distribution services (LMDS), satellite communications (SATCOM) and very small aperture terminal (VSAT) use.
The model XP1000P1 GaAs MMIC surface-mount power amplifier is a two-stage amplifier optimized for linear output operation over the 17 to 24 GHz frequency range that features an output third-order intercept point of +36 dBm and a small-signal gain of 18 dB.
Using a 0.15 mm gate length GaAs pseudomorphic high electron mobility transistor (PHEMT) device model technology, the chip has been specifically designed to provide excellent linearity for applications utilizing high index modulation schemes. Figure 1 shows the XP1000P1 device's typical gain vs. frequency.
The device is supplied in a surface-mount leadless chip carrier compatible with high volume SMT processing and includes an on-chip temperature-compensated output power detector and excellent input/output return loss. Figure 2 shows the amplifier's return loss vs. frequency.
The device's recommended supply voltage is +5.5 V DC and supply current is 430 mA. Maximum gate bias is +0.3 V DC and maximum input power is +9.0 dBm.
Operating temperature is -55° to +75°C and storage temperature is -65° to +165°C. Table 1 lists the XP1000P1 amplifier's electrical characteristics at an ambient temperature of 25°C.
The XP1000P1 device has a broadband response that closely matches die performance with good thermal conductivity, providing a reliable SMT power amplifier. The SMT package permits assembly using standard SMT processes with no specialized die attach or wire bonding requirements, thus leading to a more rugged assembly for tuning and testing.
Engineering samples of the XP1000P1 device are available in limited quantities from stock and production quantities are available on order within eight weeks. Additional information may be obtained from the company's Web site and technical support is available from the company's application engineers at the number below.
Mimix Broadband Inc.,
Webster, TX (281) 526-0536,
Circle No. 300