A. V. Labyntsev1, D. V. Kharlanov2, N. E. Ponomarev3, A. N. Sarzhanov4
1 Southern Federal University (Taganrog, Russia)
2–4 Krasnodar Higher Military School named after Army General S.M. Shtemenko (Krasnodar, Russia)

The development of the theory of microstrip filters designing currently does not lose its relevance. One of the ways to improve the electrical characteristics of bandpass filters is introduction of new additional elements into the resonator, which allows for resonance at higher frequencies and at the same time increase the selectivity of the filter. Such elements are a pair of metallized holes in this work. They are located along the axis of the resonator in the center at a small distance from each other.

The purpose of this work is to describe a mathematical model of a microstrip filter. This model is the basis for the development of a synthesis technique and an algorithm for designing a filter consisting of two three-section resonators.

As a result, resonance conditions and matching conditions have been obtained. Their satisfaction during an iterative purposeful process allows you to find all the geometric dimensions of the filter. It has been shown that the resonance conditions must be fulfilled for the 4-pole to which the transition from the filter is carried out, and the matching conditions must be satisfied for the corresponding 8-pole.

Labyntsev A.V., Kharlanov D.V., Ponomarev N.E., Sarzhanov A.N. Bandpass microstrip filter from two three-section resonators. Antennas. 2022. № 6. P. 69–78. DOI: https://doi.org/10.18127/j03209601-202206-06 (in Russian)

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