The Pi Attenuator has a single series resistor and a shunt to ground on the input and output.
The Reflection Attenuator is typically used as a variable phase shifter.
https://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-reflection-attenuator
The P0286-ND is a hardware platform built around the Altera System-on-CHIP (SoC) FPGA.
The WRL-13764-ND Particle Photon combines a ARM Cortex M3 microcontroller with a Broadcomm WiFi chip in a tiny module calle the P-zero.
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