Introduction
The negation element in Cadence Microwave Office uses a negation technique to de-embed a specified network from an intrinsic network. We will be using this element in combination with Python and Analog Devices ADMV8818-EP to demonstrate how Microwave Office can offer an elegant solution to fully characterize the device. The ADMV8818-EP part from Analog Devices is a MMIC that operates in the 2-18GHz regime and has 64 highpass filters, 64 lowpass filters, and two through lanes to bypass both the high-pass and low-pass filters. With 64 different high-pass filter states and 64 low-pass filter states, this means there are 4096 unique combinations that a customer could potentially be interested in. Using the negation element, only the individual 128 filter states and the double bypass measurements need to be captured in order to reconstruct all 4096 measurements within approximately 0.1 dB accuracy in the passband. The graphic on the right illustrates the different highpass filter and lowpass filter lanes.