Microwave Passive Devices

A company is developing a compact microwave bandpass filter for 5G base stations. The device must: Operate in the 3.5 GHz frequency band with low insertion loss Reject out-of-band signals effectively Integrate with planar PCB technology for easy assembly Maintain performance over a temperature range of -40°C to +85°C 1.Recommend whether to use a microstrip line design or a substrate-integrated waveguide (SIW) approach for this filter. 2.Justify your choice by discussing at least four relevant factors (insertion loss, size, fabrication cost, Q-factor, etc.). 3.Which substrate material family (ceramic-based or polymer-based) would you prefer and why?