Bird - The RF Experts
Bandpass Cavity Filters
Cavity Filters
Bandpass Cavity Filters

Bandpass Cavity Filters
The Bandpass cavity passes one narrow band of frequencies and attenuates all others with increasing attenuation above and below the pass frequency. It is equivalent to a parallel-tuned circuit and is most often used for general transmitter spurious clean-up or a sharpening of a single receiver front end selectivity with or without amplification.

TX RX bandpass cavities (4", 6", 8” and 10") have adjustable selectivity characteristics (rotatable loops) to allow a trade-off between insertion loss (0.5--3.0 dB) and selectivity. Maximum power handling is typically determined by insertion loss setting.

T-Pass Cavity Filters are a variation of the Bandpass cavity used for our expandable multicoupler applications. Its general characteristics are nearly identical to a bandpass cavity but the output loop has a pair of N-connectors so it can easily be coupled to other channels.

Cavity Filters
Bandpass Cavity Filters
Check up to five products to compare
Item No
Item Name
Frequency Range
Max Power per Cavity
Interface Specs Ω
Bandpass Cavity Filters
108-136 MHz
270 W, per cavity @ 0.5 dB IL
60W, per cavity @ 3.0 dB IL
50
Bandpass Cavity Filters
132-150 MHz
270 W, per cavity @ 0.5 dB IL
60W, per cavity @ 3.0 dB IL
50
144-174 MHz, Bandpass Cavity Filters
144-174 MHz
270 W, per cavity @ 0.5 dB IL (100 W - Model: 11-37-09)
60W, per cavity @ 3.0 dB IL (N/A - Model: 11-37-09)
50
225-400 MHz, Bandpass Cavity Filter
225-400
100 W, per cavity @ 0.5 dB IL
100 W, per cavity @ 3.0 dB IL
50
406-420 MHz, Bandpass Cavity Filters
406-420 MHz
270 W, per cavity @ 0.5 dB IL
60W, per cavity @ 3.0 dB IL
50
470-512 MHz, Bandpass Cavity Filters
470-512 MHz
270 W, per cavity @ 0.5 dB IL (100 W - Model: 11-69-09)
60 W, per cavity @ 3.0 dB IL (N/A - Model: 11-69-09)
50
450-470 MHz, Bandpass Cavity Filters
450-470 MHz
270 W, per cavity @ 0.5 dB IL (100 W - Model 11-70-09)
60W, per cavity @ 3.0 dB IL (N/A - Model 11-70-09)
50
746-869 MHz, Bandpass Cavity Filters
746-869 MHz
270 W, per cavity @ 0.5 dB IL
60W, per cavity @ 3.0 dB IL
50
806-821 MHz, Bandpass Cavity Filters
806-821 MHz
270 W, per cavity @ 0.5 dB IL
60W, per cavity @ 3.0 dB IL
50
851-866 MHz, Bandpass Cavity Filters
851-866 MHz
270 W, per cavity @ 0.5 dB IL
60W, per cavity @ 3.0 dB IL
50
806-960 MHz, Bandpass Cavity Filters
806-960 MHz
270 W, per cavity @ 0.5 dB IL
60W, per cavity @ 3.0 dB IL
50
806-960 MHz, Bandpass Cavity Filters
806-960 MHz
100 W, per cavity @ 0.5 dB IL
N/A, per cavity @ 3.0 dB IL
50