1. Determine the filter specifications, such as center frequency, bandwidth, and attenuation level.
2. Choose a suitable filter topology that meets the specifications. In this case, a quasi-elliptic filter topology is chosen due to its sharp cutoff characteristics.
3. Use ADS (Advanced Design System) software to design the filter. ADS is a powerful simulation tool that allows for accurate modeling of microwave circuits.
4. Choose a microstrip substrate material and thickness for the filter. This will affect the impedance of the microstrip lines and the overall size of the filter.
5. Determine the dimensions of the microstrip lines and resonators based on the desired center frequency and bandwidth of the filter.
6. Simulate the filter in ADS to optimize its performance and ensure that it meets the desired specifications.
7. Once the design is finalized, create a layout for the filter using ADS Layout software or another layout tool.
8. The layout should be designed to match the attached picture as closely as possible.