Design of highly selective bandpass filters for communication between two satellites at K band frequency

This paper represents design of Substrate integrated waveguide (SIW) based bandpass filters for the centre frequency of 22.5 GHz and 23.5 GHz for communication between two satellites. A proposed filter has been designed for the transceiver used in communication linking and ranging between two satellites. However, the allotted band for satellites communication is 22.5-23.5GHz so that we have to design very narrowband bandpass filter which isolated two frequencies having bandwidth less than 170 MHz and quality factor is more than 100. Simulation of the proposed structures have been carried out by Ansoft high frequency structural simulator (HFSS) and it shows that the proposed structures having bandwidth is 110MHz and quality factor is 203 which reasonable for isolation. An equivalent LC circuit has been derived of the proposed structure and it is verified by the advanced designing system (ADS).