Why high gain 0.5W driver amplifier is suitable for Pico cell
With the advancement of LTE technology, pico-cells have become increasingly popular. A pico-cell is a compact base station that can support up to 200 users within a coverage area of 100 to 200 meters. These small cells are particularly useful in large buildings, shopping malls, and high-density areas where network capacity and service quality need to be enhanced. By boosting the capacity of LTE networks, pico-cells improve the stability and reliability of wireless services, ensuring a better user experience. Compared to macro base stations, pico-cells are smaller—about one-third the size of current RRU units—and consume less power. Additionally, compared to femto-cells, which typically cover only 10 meters and support up to 20 users, pico-cells offer greater coverage and support more simultaneous connections.
In Shiqiang's AVAGO product line, the MGA-31689 power amplifier is well-suited for pico-cell applications. It has a 1 dB compression point of 27.6 dBm and an LTE PAR of 8.5 dB. The amplifier meets LTE’s high linearity requirements at 19 dBm output power, making it ideal for achieving high data throughput in LTE networks.
The MGA-31689 also features a gain of 18 dB, and in simulations, it demonstrates balanced performance across all parameters. However, in practical system design, the effective gain is often around 16 dB. Since the transceiver output power usually ranges from -30 dBm to 10 dBm, a 16 dB gain is typically sufficient to meet the system's output requirements.
The simulation results for the MGA-31689 are as follows:
**Figure 1: Simulation Results**
From the simulation data, the gain of the MGA-31689 decreases slightly with increasing frequency in the 1.5 GHz to 3 GHz range. To maintain gain balance, digital attenuation or baseband control can be used in pico-cell products. Furthermore, the S22 parameter (output port VSWR) shows better convergence compared to S11, and its position is closer to the origin, which helps optimize both the output power and linear performance of the power amplifier.
**Figure 2: Simulation Schematic**
The peripheral matching values in the schematic may differ from the datasheet specifications, but they can be fine-tuned based on the actual circuit performance or board design requirements.
The superior performance of the MGA-31689 ensures excellent signal coverage and high-quality transmission for pico-cell systems. In the LTE era, this amplifier supports the growing demand for reliable indoor mobile internet access and other data services. Now, the MGA-31689 has been successfully ordered by Shiqiang. For professional and fast service, please contact Shiqiang's customer hotline at 40088-73266.
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