MC-TECH 's MDF Series Waveguide Diplexers are available in major communication frequency band. Existing product offer narrow frequency band to cover common North America point-to-point digital radio frequency band from 18 to 65 GHz. These diplexers consist of two E-plane bandpass filters (BPF) and a circulator. The critical element of E plane BPF is designed by using proprietary simulation tool and fabricated by conventional low cost printed circuit techniques. The diplexers require no tuning, which allows low cost, high volume production. Typical insertion loss is from 1.0 to 2.0 dB depending on the channel bandwidth and isolation. The frequency stability is around -0.4 MHz/°C with low cost aluminum housing. The existing product performance is illustrated below. Other frequency bands are also available upon request.