Novel Broadband and Dual-mode Microstrip Bandpass Filter and Power Divider

Filter plays an important role in communication systems. It is an electronic device that allows signal in certain frequency ranges to go through. In other words, filter helps remove all the unwanted frequency components in a signal. Generally, there are four types of filters: lowpass filter, highpass filter, bandpass filter and bandstop filter. Two filters have been proposed in my project. The first one is a microstrip bandpass filter that is designed and fabricated on the Rogers Duroid 6006 substrate. The second design is a microstrip power divider. Power divider splits an input signal into two equal ones at the output ports. The input and output ports are connected through microstrip line, which is fabricated on a Rogers Duroid 6006 substrate. This project can be divided into three development stages: simulation, fabrication and experiment. High Frequency Structure Simulator (HFSS) has been used to simulate the filter and power divider. A microstrip bandpass filter and power divider will be fabricated based on the HFSS and the frequency responses will be measured by using Vector Network Analyzer (VNA) in laboratory. The measured results of the filter and power divider agree well with the simulated results. Several case studies have been completed on the proposed filter and power divider in order to study the relationship of different parameters on them. Discussions and future work have been proposed after the case studies. The proposed filter and power divider designs should be useful for compact transceiver modules.