Bandpass Filters
Trilithic Cavity Bandpass Filters exhibit lower losses and narrower bandwidths than most coaxial filters.
The series CH and CR filters cover a frequency range from 30 MHz to 3,000 MHz. Percent 3 dB bandwidth ranges from 0.2% to 3%. The CR series uses 1 /4 wavelength resonant structures while the CH series uses a helical coil design to achieve lower frequency operation.
Units are available with two through six sections providing a Chebyshev response with low insertion loss. VSWR is less than 1.5:1. Each unit is housed in a high "Q" sturdy aluminum case. Cavities are iris coupled and shielded to minimize RF leakage.
| CH - Filters |  |
Helical Cavity | 30 to 400 MHz | 0.2% to 3% | See Page 50 | Large | Very Low |
| CR - Filters |  |
1 /4 Wave Cavity | 400 to 3,000 MHz | 0.2% to 3% | See Page 50 | Large | Very Low |
Download Cavity Filter Catalog Pages
The combline style of filter offers the systems designer an extremely low insertion loss filter in the medium to wide bandwidth ranges. Typical losses are less than 1 dB for most designs with bandwidths of 5% or more.
| CC - Filters |  |
1 /4 Wave Cavity | 300 to 18,000 MHz | 0.2% to 60% | See Page 52 | Small to Large | Very Low |
Download - Combline Cavity Filter Catalog Pages
Trilithic Tubular Bandpass Filters are a low ripple Chebyshev design and are available with 2 thru 12 sections in frequency ranges from 25 to 6,000 MHz with relative band-widths from 2% to 50%.
Six different sizes and frequency ranges allow for the selection of an optimal design for each requirement. Almost any type of input or output connection is available as a standard item.
BE Series
1 1/4 " Diameter
Mounting hardware available. See Mounting Options.
| Specifications | Standard | Special |
|---|---|---|
|
Electrical |
||
| Center Frequency MHz | 40 to 600 | 25 to 1,000 |
| Number of Sections | 3 to 8 | 9 to 12 |
| Nominal Impedance | 50 Ohms | 50/75 Ohms |
| Maximum VSWR | 1.5:1 | 1.2:1 |
| Percent 3 dB BW | 3-40% | 1-70% |
| Maximum Input Power (Average Watts to 10,000 ft.) | See (1) Below | See (1) Below |
| Maximum Input Power (Peak Watts to 10,000 ft.) | See (1) Below | See (1) Below |
| Environmental | ||
| Shock | 15 G's | 75 G's |
| Vibration | 5 G's | 30 G's |
| Relative Humidity | 90% | 100% |
| Altitude | Unlimited | Unlimited |
| Operating Temperature | -20 to 50 C | -55 to 125 C |
| Non-operating Temperature | -54 to 70 C | -55 to 150 C |
| Mechanical | ||
| Approximate Weight | 1.5 Oz./ln. | 1.5 Oz./ln. |
(1) Dependent upon center frequency and percent bandwidth. Please consult factory for rated power.
Download Tubular/Coaxial Filter Catalog Pages
BD Series
3/4" Diameter
Mounting hardware available. See Mounting Options.
| Specifications | Standard | Special |
|---|---|---|
|
Electrical |
||
| Center Frequency MHz | 80 to 1,000 | 40 to 1,700 |
| Number of Sections | 3 to 8 | 9 to 12 |
| Nominal Impedance | 50 Ohms | 50/75 Ohms |
| Maximum VSWR | 1.5:1 | 1.2:1 |
| Percent 3 dB BW | 3-40% | 1-70% |
| Maximum Input Power (Average Watts to 10,000 ft.) | See (1) Below | See (1) Below |
| Maximum Input Power (Peak Watts to 10,000 ft.) | See (1) Below | See (1) Below |
| Environmental | ||
| Shock | 15 G's | 75 G's |
| Vibration | 5 G's | 30 G's |
| Relative Humidity | 90% | 100% |
| Altitude | Unlimited | Unlimited |
| Operating Temperature | -20 to 50 C | -55 to 125 C |
| Non-operating Temperature | -54 to 70 C | -55 to 150 C |
| Mechanical | ||
| Approximate Weight | 1 Oz./ln. | 1 Oz./ln. |
(1) Dependent upon center frequency and percent bandwidth. Please consult factory for rated power.
Download Tubular/Coaxial Filter Catalog Pages
BC Series
1/2" Diameter
Mounting hardware available. See Mounting Options.
| Specifications | Standard | Special |
|---|---|---|
|
Electrical |
||
| Center Frequency MHz | 100 to 2,000 | 60 to 3,000 |
| Number of Sections | 3 to 8 | 9 to 12 |
| Nominal Impedance | 50 Ohms | 50/75 Ohms |
| Maximum VSWR | 1.5:1 | 1.2:1 |
| Percent 3 dB BW | 3-40% | 1-70% |
| Maximum Input Power (Average Watts to 10,000 ft.) | See (1) Below | See (1) Below |
| Maximum Input Power (Peak Watts to 10,000 ft.) | See (1) Below | See (1) Below |
| Environmental | ||
| Shock | 15 G's | 75 G's |
| Vibration | 5 G's | 30 G's |
| Relative Humidity | 90% | 100% |
| Altitude | Unlimited | Unlimited |
| Operating Temperature | -20 to 50 C | -55 to 125 C |
| Non-operating Temperature | -54 to 70 C | -55 to 150 C |
| Mechanical | ||
| Approximate Weight | .75 Oz./ln. | .75 Oz./ln. |
(1) Dependent upon center frequency and percent bandwidth. Please consult factory for rated power.
Download Tubular/Coaxial Filter Catalog Pages
BBA Series
1/4" Diameter
Mounting hardware available. See Mounting Options.
| Specifications | Standard | Special |
|---|---|---|
|
Electrical |
||
| Center Frequency MHz | 400 to 4,000 | 200 to 6,000 |
| Number of Sections | 3 to 6 | 7 to 8 |
| Nominal Impedance | 50 Ohms | 50 Ohms |
| Maximum VSWR | 1.5:1 | 1.2:1 |
| Percent 3 dB BW | 3-40% | 1-70% |
| Maximum Input Power (Average Watts to 10,000 ft.) | See (1) Below | See (1) Below |
| Maximum Input Power (Peak Watts to 10,000 ft.) | See (1) Below | See (1) Below |
| Environmental | ||
| Shock | 15 G's | 75 G's |
| Vibration | 5 G's | 30 G's |
| Relative Humidity | 90% | 100% |
| Altitude | Unlimited | Unlimited |
| Operating Temperature | -20 to 50 C | -55 to 125 C |
| Non-operating Temperature | -54 to 70 C | -55 to 150 C |
| Mechanical | ||
| Approximate Weight | .375 Oz./ln. | .375 Oz./ln. |
(1) Dependent upon center frequency and percent bandwidth. Please consult factory for rated power.
Download Tubular/Coaxial Filter Catalog Pages
Click on the link above to go to the Ultraminature LC Filters page
For other RF / Microwave Filters from Trilithic click on the links below.