2.45 GHz Frekasında Optimum Bant Durduran Filtre Tasarımı ve Optimizasyonu

Filtre yapılarının RF/mikrodalga uygulamalarındaki önemi oldukça fazladır. Bant durduran filtreler biyomedikal cihazlarda da sıklıkla kullanılmaktadır. Biyomedikal cihazlarda ölçüm yapılırken havada dolaşan istenmeyen sinyallerin sapmalara neden olmaması için, cihazlara bu frekanstaki sinyalleri durduran filtreler konulmaktadır.WLAN uygulamalarından olan IEEE 802.11b azami 11Mbit/s lik bir ham hıza sahiptir ve orijinal standartta aynı cihazları bağlamak için kullanılmaktadır. IEEE 802.11b standartında çalışan aygıtlar, 2.45 GHz ile çalışan diğer aygıtlardan (mikrodalga fırın, Bluetooth aygıtları, kablosuz telefonlar) dolayı bir parazitlenme yaşamaktadır. Bu çalışmanın ana hedefi; bu girişimlerin engellenmesi amacıyla, 2.45 GHz frekansında bant durduran filtre tasarımı gerçekleştirilmiştir. Gerçekleştirilen bu bant durduran filtre tasarımları sayesinde; istenmeyen sinyaller filtrelenmiş, istenilen sinyallerin başarılı bir şekilde iletilmesi sağlanmıştır.

Anahtar Kelimeler:

İletim Hatları, Mikroşerit Filtre, Optimum Bant Durduran Filtre, ADS

Design and Optimization of Microstrip Optimum Band-Stop Filter at 2.45 GHz

The importance of filter structures in RF/microwave applications is very high. Band-stopping filters are also frequently used in biomedical devices. When measuring biomedical devices, filters that stop signals at this frequency are placed on the devices so that unwanted signals circulating in the air do not cause deviations. IEEE 802.11 b has a maximum speed of 11mbits/s, and is used to connect the same devices to the original standard. IEEE 802.11 b standard devices are experiencing interference due to other devices running at 2.45 GHz (microwave oven, Bluetooth devices, wireless phones). The main objective of this work is; In order to prevent these interferences, band stop filter design at 2.45 GHz frequency was realized. Thanks to the filter designs that stop this band, unwanted signals have been filtered and the desired signals have been successfully transmitted.

Keywords:

Transmission Line, Microstrip Filter, Optimum Band-Stop Filter, ADS,

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