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    Registered to ISO 9001
    Certificate TW12/11128
 
         

 

 

Band Reject Filter

 
 

Features
 
* Class A RFI Shielding

* Support DOCSIS 3.1

* Low Loss

* High Rejection

* Excellent Return Loss

* Flat Pass Band

* High Stability

* Excellent Mechanical Structure

* Precision Connector Thread

* Exquisite Plating Quality

* Good Weather Resistance

* Waterproof (alternative)

* Patented Housing
 
Band Reject Filter
 
Introduction

The band reject filters, or called band stop filters, are typically designed to pass the CATV return path (eg 5-42MHz, 5-65MHz, etc.) and UHF band signals and reject all other CATV channels (eg 55-500MHz, 85-450MHz, etc.).

This circuit structure of wide stop band filter is a invented by Soontai.

This means that the rejection band can have a width of 100 MHz, 500 MHz or higher.

Therefore, it is possible to design different reject band width according to the needs of the customer system.

Soontai's band reject filters provide many features (see below).

1. Wide and deep reject band, provides excellent rejection capabilities to clear undesired signal,
    rejection better than 50dB.

2. Lowest insertion loss, signal-through-loss reduced to a minimum.

3. Excellent return loss, good impedance match reduces signal loss to keep the signal clean. (see figure)

4. Dual layer brass tubes provide the best radio frequency interference (RFI) / electromagnetic interference (EMI) protection.

We can design other models according to your specifications.

For more filter products, please see our filter category.

To learn more filter types please see the filter profile technical notes in our Tech Support.

Custom filters or more details on inquires, please refer to Custom Filters.

  Items
Model Reject Band 1st Pass Band 2nd Pass Band
BRF-55-500 55 - 500 MHz 5 - 42 MHz 550 - 1000 MHz
BRF-55-550 55 - 550 MHz 5 - 42 MHz 600 - 1000 MHz
BRF-70-500 70 - 500 MHz 5 - 55 MHz 550 - 1000 MHz
BRF-85-350 85 - 350 MHz 5 - 65 MHz 400 - 1000 MHz
BRF-85-620 85 - 620 MHz 5 - 65 MHz 659 - 1000 MHz
BRF-222-526 222 - 526 MHz 5 - 215 MHz 552 - 1000 MHz
BRF-245-356 245 - 356 MHz 5 - 230 MHz 380 - 1000 MHz
BRF-330-522 330 - 522 MHz 5 - 300 MHz 552 - 1000 MHz
  Electrical Curve ( BRF-55-550 )

Insertion loss  |  Return Loss
SPAN 1000MHz
Fig 1

Insertion Loss  |  Return Loss
Close Up 5 - 42MHz
Fig 2
  General Specifications
  Item BRF-55-550
  Impedance 75 ohm
  Frequency Range 5 - 1000MHz
  Insertion Loss ( 5 - 42MHz ) 0.5dB (typ) / 2.0dB (max)
  Insertion Loss ( 600 - 1000MHz ) 0.6dB (typ) / 2.5dB (max)
  Return Loss 20dB (typ) / 14dB (min)
  Rejection ( 55 - 550MHz ) 50dB (min)
  Dimensions (incl. M/F connectors) 21(¢) x 57(L) mm
  Net Weight 48g
 * Specifications may be change depending on the model or customer's requirement.

 

 
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