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With today’s increasingly crowded frequency spectrum, it is becoming imperative that one transmission source remain isolated from other nearby transmission sources. A key component in keeping everyone off of each others toes is an ultra-narrowband notch or bandpass filter.
In most RF and Microwave applications desired signals must be transmitted with minimum loss, while unwanted frequencies need to be strongly attenuated. For most applications, notch or band-pass filters provide adequate protection. While in other cases, a high-pass, or a low-pass filter may be utilized. Occasionally, however, there are interfering frequencies which are particularly close in and strong that need to be eliminated. In these instances, an extremely narrow band high performance notch or bandpass filter is required.
This paper will explore the advantages of selecting one of the four filter types mentioned above, and the benefits of using each choice.
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