Abstract:

The importance of filter structures in RF/microwave applications is quite high. These filters are frequently used in microwave systems, especially in satellite and mobile communication systems. Generally, in devices such as oscillators and mixers; to block unwanted signals, band-stop filters are added to the structures. One of the WLAN applications, IEEE 802.11b has a maximum raw speed of 11Mbit/s and is used to connect the same devices in the original standard. Devices operating in the IEEE 802.11b standard experience interference from other devices (microwave ovens, bluetooth devices, cordless phones) operating at 2.45 GHz. As the main goal of this study; in order to prevent this interference, band-stop filter circuit design with single/three open stubs were carried out at the frequency of 2.45 GHz. Thanks to the realized band-stop filter designs; unwanted signals are filtered and the desired signals are transmitted successfully.

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