title: Ð ÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ñ Ð¼Ð¸ÐºÑÐ¾Ð¿Ð¾Ð»Ð¾ÑÐºÐ¾Ð²ÑÑ Ð¿Ð¾Ð»Ð¾ÑÐ¾Ð²ÑÑ ÑÐ¸Ð»ÑÑÑÐ¾Ð² Ñ ÑÐ¸ÑÑÐµÐ¼Ð¾Ð¹ ÑÐ»ÐµÐºÑÑÐ¾Ð½Ð½Ð¾Ð¹ Ð¿Ð¾Ð´ÑÑÑÐ¾Ð¹ÐºÐ¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Realization of a microstrip bandpass filter with electronic tuning system
Creators: name: ÐÐ°ÑÐ¿Ð¾Ð²Ð°, ÐÐ¸ÐºÑÐ¾ÑÐ¸Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2021
Subjects: Ð¤Ð¸Ð»ÑÑÑÑ ÑÐ»ÐµÐºÑÑÐ¸ÑÐµÑÐºÐ¸Ðµ Ð¿Ð¾Ð»Ð¾ÑÐ¾Ð²ÑÐµ
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description: The subject of the graduate qualification work is âRealization of a microstrip bandpass filter with an electronic tuning systemâ. The given work is devoted to the development of a microstrip bandpass filter with an electronic tuning system. In this master's thesis the structure of a microstrip filter based on parallel-coupled half-wavelength resonators was calculated. Characteristics of the filter are as follow: a center frequency of 1450 MHz, bandwidth of 80 MHz, attenuation in the stopband of more than 40 dB, losses and ripples in the passband of less than 2,5 dB and 0.02 dB, respectively. Furthermore, the analysis of the components for the implementation of the filter and the electronic tuning system was carried out, as a result of which a varactor diode was chosen as a tuning element. The possibility of using digital capacitors was also considered. The circuit with a symmetrical capacitive load was simulated using the SPICE-model of the selected elements to take into account parasitic phenomena arising from the connection of real elements. The paper also presents an optimization procedure of a microstrip tunable filter. As a result of the work, a bandpass filter was obtained with a tuning range from 1111 to 1350 MHz with 80 MHz bandwidth, attenuation in the stopband of more than 40 dB and losses in the passband of less than 7 dB and less than 2,8 dB for the lower and upper limits of the tuning range, respectively.