A new microstrip band-pass filter for UHF range

In this paper a printed filter operating at low end of UHF range is realized by implementation of a band-pass filters configuration with capacitive coupled resonators. The filter operates at central frequency of 380 MHz with 18% wide 3 dB bandwidth. The filter has a shape of a square with the edge length smaller than one eleventh of the wavelength. Filter's design process is described in detail. Measured and predicted results are in very good agreement.