Key Specifications. Waveguide Size 1 WR-42 Waveguide Size 2 WR-42 Frequency, Min 17.7 GHz Frequency, Max 23.55 GHz Lowband Min Rejection 65 dB Highband Min Rejection 65 dB. Bandpass Waveguide Filter With WR-42 Interface Operating from 17.7 GHz to 23.55 GHz. Waveguide bandpass filter PE-W42F011 from Pasternack is manufactured with a WR-42 input and is part of a large selection of RF/microwave/millimeter wave waveguide components. WR-42 waveguide bandpass filter is rated for a radio frequency minimum of 17.7 GHz and a frequency maximum of 23.55 GHz as the pass band range. WR42 bandpass waveguide filter is designed for a rejection minimum of 65 dB and constructed to RF industry specs. More details on PE-W42F011 WR-42 band pass wave guide filter can be found on the the waveguide bandpass filter design datasheet specifications up above. WR 42 waveguide bandpass filter from Pasternack is in stock now at our Irvine, CA facility. Our waveguide bandpass filter with WR-42 flanges is part of over 40,000 components for RF, microwave and millimeter wave applications in-stock which are available to ship same day worldwide.