Design and implementation of a wide-band band pass filter in suspended stripline

A band-pass filter with 70% bandwidth, effectively functioning as a pseudo-high pass filter has been designed and implemented using suspended strip-line technology. In principle such a filter can easily be fabricated by cascading low pass and high pass filters, but it is difficult to fabricate high pass filters in suspended stripline, and this filter is expected to overcome this difficulty. The filter is fabricated using coupled-line resonators, and broadside-coupled lines are used to realise the required impedance levels