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Phase response characteristics of multiband filters, as well as diplexers, with different amplitude response characteristic approximations based on high-pass and low-pass filters are studied. An absolute diplexer phase reaches the maximum at the frequency when LPF and HPF amplitude response characteristics intersect. The phase maximum value depends on juncture bandwidth and channel isolation.
The new filters and diplexers for satellite radio navigation system based on low and high pass filter are presented. Each filter has the broad stopband and low signal power losses in the passband. Location of the bands is chosen to cover the GPS and GLONASS ranges L1 and L2 and provide resolution between each other. In the article the plots characteristics of diplexers and filters transmission gain...