SOONTAI - CATV Band Reject Filter, CATV Band Stop Filter (CE Approved / High Q Series)

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Band Reject Filter

Features

* Class A RFI Shielding

* Support DOCSIS 3.1

* Low Loss

* High Rejection

* Excellent Return Loss

* Flat Passband

* High Stability

* Excellent Mechanical Structure

* Precision Connector Thread

* Exquisite Plating Quality

* Good Weather Resistance

* Waterproof (alternative)

* Patented Housing

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 more.

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.