Abstract:
This paper deals with the design and fabrication of edge-coupled band pass
filter (BPF) circuit (fifth order) on microwave laminate for 4.5 GHz ± 0.5 GHz
application. The design of filter is realized on a high quality RT/ duroid
laminate having the dielectric constant 10.5 and substrate thickness 1.27
mm. The relevant design specifications, simulation, and test results of the
circuit is described. The numerical calculations and simulations are
performed in Linpar. The Printed Circuit Board (PCB) artwork is prepared in
CorelDraw. A prototype of the design was manufactured and tested on
microwave network analyzer. Some offsets are observed between the
theoretical and practical results, which may be attributed to the wide
tolerance in the dielectric permittivity specified for the RT/ duroid
substrate.
