Abstract
Filters occupy important acts in several Radio Frequency microwave applications. Several applications such as wireless communications still challenge RF/microwave filters with strict requirements such as smaller size, higher performance, lighter weight, and lower cost. Microstrip Filters for RF/Microwave Applications offers a unique and comprehensive treatment of RF/microwave filters based on the microstrip structure. One of the most common methods in designing microwave filters is using of parallel-coupled microstrip. In this paper simulate and fabricate by using Ansoft Designer a two resonator microstrip band-pass filter suitable for Wi-Fi applications. The results of simulation were quite good.
Highlights
Filters occupy important acts in several Radio Frequency microwave applications
Filter design: In this part the filter design will be explained, simulate, fabricate and testing a coupled line band-pass filter that be suitable for Wi-Fi applications with 100MHz bandwidth
For instance its copper thickness in datasheet is considered around 18 microns in some parts it was more than 70microns so that it reached CNC machine surface cleaning limitation and can not be removed by machine
Summary
Filters occupy important acts in several Radio Frequency microwave applications. It is used to separate or combine different frequencies. The traditional design of parallel-coupled line filters, suffers from the spurious response at twice of the design frequency, which degrades pass band symmetry and deteriorates rejection levels in upper stop-band. The equalization can be achieved by using capacitor compensation, suspended substrates, corrugated coupled lines and an overlay dielectric. Both of [3,4] used parallel-coupled microstrip filters and considered one of the best and common approaches for implementing a planar filter. The band pass filter with suppression of spurious responses has been designed by using a flat dielectric overlay. Our objective is to design a filter with a uniform overlay dielectric, so that each stage is suppressing the spurious responses
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