Electronics Weekly
Performance is focused on optimizing the PA for a 5V supply voltage that minimizes power consumption to allow for systems that use digital pre-distortion to achieve the highest linear output power and leading edge throughput for the RF chain. This is done across a wide bandwidth enabling operation in all channels from UNII 1-3 (5.125 to 5.925 GHz).
A coupler with RF output is integrated for DPD feedback training. For power control a broadrange, constant slope voltage logarithmic power detector is provided for application feedback. The QPF4557 integrates a 5 GHz power amplifier (PA), single pole two throw switch (SP2T), coupler structure and bypassable low noise amplifier (LNA) into a single device.
Key Features
- 5170 – 5895 MHz
- PSAT = +32 dBm
- Optimized for +5 V Operation
- DC Power = 1.7 W at +24 dBm
- 33 dB Tx Gain
- 1.6 dB Noise Figure
- 14.5 dB Rx Gain & 7 dB Bypass Loss
- 25 dB 2.4 GHz Rejection on Rx Path
- Integrated RF Coupler & DC Logarithmic Power Detector
