Let fp1 and fp2 be the passband and fs1 and fs2 the stopband frequencies of the channel filters corresponding to two standards of operation respectively. |
Microstrip transmission lines with an electromagnetic bandgap structure exhibit stopband and slow-wave characteristics, which can be used as stop band or low-pass filters. |
The crystals were expected to have a stopband centering at around 4 m, which was verified in testing. |
As shown, the LHM and RHM can be identified and the passbands are observed, separated by a finite stopband. |