bandstop filter การใช้

• Multiple bandstop filters can always be expressed in terms of a multiple bandpass filter.
• Bandstop filters can be regarded as a combination of a lowpass and a highpass filter.
• In fact, in some treatments, the bandstop filter is considered to be a type of multiple passband filter having two passbands.
• Where \ lambda _ g is the wavelength corresponding to the central rejection frequency of the bandstop filter, measured-of course-in the microstrip line material.
• The dual circuit of the bandstop filter can be obtained simply equating the reflection coefficient of the bandstop FSS to the transmission coefficient of the bandpass FSS to obtain ( if we use L 1, C 1 for the bandstop patch FSS and L 2, C 2 for the bandpass mesh FSS ):