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Bandpass filter is a passive component which is able to select signals inside a specific bandwidth at a certain center frequency and reject signals in another frequency region, especially in frequency regions, which have the potential to interfere the information signals. A bandpass filter must be used in transmitter and receiver to reject undesired signals. This paper presents the design and fabrication of bandpass filter for frequency-modulated continuous wave radar system. A bandpass filter was designed at the operating center frequency of 456 MHz, bandwidth of 60 MHz, 3 dB insertion loss, 1.1 VSWR, 50 ohm impedance. The outcome of this research was a prototype of a 456 MHz bandpass filter and the results of the measurement were approximately similar to the required specifications.
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