| PRODUCTS - BANDPASS FILTERS |
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 Bandpass Filter / Band Reject Filter Products
Bandpass filter and band reject filter products
for different customer specified applications
 |  | Shown below are examples of PROCOM band pass filters and band reject filters including Notch and cavity types.
More products are available in the PDF Product Catalogue. | | SEE ALSO: |
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Customized band pass filter and band reject filter design are available on demand, please contact us for further information.
BPF 2/3 Bandpass Filter for the 160 MHz Band
The BPF 2/3 is a 3-helical resonator bandpass filter with aperture-coupling between the resonators.
This filter can be used as a preselector to protect a receiver against interference from transmissions out of the passband, or it can be used to reduce spurious output from a transmitter with up to 50 watt output power.
The filter can be tuned within the entire 144-175 MHz band. It is designed with very small dimensions owing to the use of helical resonators. Careful design and choice of materials ensure reliable operation over a wide temperature range.
The housing is made of extruded aluminium, the chassis of steel, and teflon insulation has been used in the coaxial cables and in the connectors. The bandpass filter is black vinyl coated to prevent corrosion.
Download PDF file for further details and specifications about the BPF 2/3 bandpass filter.
 Please notice, more products are available in the PDF Product Catalogue.
BPF 2/…-200 Bandpass Cavity Filter series for the 150 MHz Band
High power base station band pass filters for the 140-175 MHz range.
The design with large ø200 mm cavities means a high Q, resulting in a very narrow passband. The large dimensions also mean a high power rating.
Unloaded Q of a single cavity is approx. 7000. High frequency stability on temperature and power.
19” mounting brackets are available as an option.
Download PDF file for further details and specifications about the BPF 2/...-200 bandpass filter.
Please notice, more products are available in the PDF Product Catalogue.
BPF 70/…-125 Bandpass Cavity Filter series for the 450 MHz Band
High power base station band pass filters for the 400-470 MHz range.
The design with large ø125 mm cavities means a high Q, resulting in a very narrow passband. The large dimensions also mean a high power rating.
Unloaded Q of a single cavity is approx. 4500. High frequency stability on temperature and power.
19” mounting brackets are available as an option.
Download PDF file for further details and specifications about the BPF 70/...-125 bandpass filter.
Please notice, more products are available in the PDF Product Catalogue.
BRF 2/3 Band Reject Filter (Notch) for the 160 MHz Band
The BRF 2/3 is a 3-cavity notch band reject filter using helical resonators.
This filter rejects a narrow band of frequencies in the 2 m band and passes all others in the range 0-430 MHz.
The filter can be applied both in connection with transmitters and receivers to attenuate interfering signals which cause cross modulation effects. The filter can be employed as a single component or it can function as an integrated part of a complete multicoupling system.
The BRF 2/3 can be tuned within the complete 144-175 MHz band. Careful design and choice of materials ensure reliable operation over a wide temperature range.
The housing is made of extruded aluminium, the chassis of passivated steel, and teflon insulation has been applied in the coaxial cables and in the connectors. The filter is black vinyl coated to prevent corrosion.
Download PDF file for further details and specifications about the BRF 2/3 bandreject filter.
Please notice, more products are available in the PDF Product Catalogue.
BRF 4/…-250 Cavity Band Reject Filter series for the 80 MHz Band
This high power base station cavity band reject filter series are designed for the 66–88 MHz range.
The design with large ø250 mm cavities means a high Q, resulting in a very narrow notch bandwidth. The large dimensions also mean a high power rating.
Unloaded Q of a single cavity is approx. 8000. High frequency stability on temperature and power.
19” mounting brackets are available as an option.
Download PDF file for further details and specifications about the BRF 4/...-250 cavity band reject filter.
Please notice, more products are available in the PDF Product Catalogue.
BPBR 2/3 / BRBP 2/3 Band Pass – Band Reject Filters for the 160 MHz Band
The BPBR 2/3… and the BRBP 2/3… are 3-cavity pass-reject filters, which pass one frequency or frequency band and reject another in immediate vicinity of the pass frequency.
The filters are delivered in two basic models: The BPBR-types have the reject range on the high side of the pass frequency and the BRBP-types have the reject range situated on the low side of the pass frequency.
These filter types can be used to protect a receiver against interference from a nearby transmitter. The filters are tuned to reject the interfering signal. Pass-reject-type filters are applied when the spacing between the utility signal and the interfering signal is so small, that the slope steepness of normal band-pass filters or notch filters are not sufficient enough to provide adequate rejection.
These filters are primarily intended to pass and reject two single frequencies, but the filters can also be tuned to pass and reject several single frequencies or to having a certain pass and reject port bandwidth. In these cases, factory-tuning is recommended.
Both the BPBR 2/3… and the BRBP 2/3… are delivered in a high-band and a low-band version tunable within 136-154 and 152-175 MHz, respectively. These models are again divided into submodels, each dedicated to work with a certain spacing between the pass frequency and the reject frequency.
The filter has very small physical dimensions owing to the use of high-Q, temperature compensated helical resonators The housing is made of extruded aluminium, the chassis of passivated steel, and teflon insulation has been applied in the rigid coaxial cables and in the connectors. The filter is black vinyl coated to prevent corrosion.
Download PDF file for further details and specifications about the BPBR 2/3 / BRBP 2/3 bandpass / band reject filter.
Please notice, more products are available in the PDF Product Catalogue.
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