Soontai Tech Co., Ltd.
  Soontai - a worldwide well-known manufacturer of catv filter solutions;
- a trusted partner, provide the better choice for you.
      Home  |  About Us  |  Products   |   News   |  Tech Support  |  Contact Us
Products - by Application -  |  CATV  |  Satellite  |  DOCSIS  |  MoCA  |  HP RF  |   
    - by Function -  
  Band Attenuators
  Cable Assemblies
  Calibration Kits
  DC Blocks
  Diplexers, Triplexers
  Band Equalizers
  > Filters
  Impedance Converters
  Power Inserters
  Splitters, Taps
  Surge Protectors
  Torque Wrenches









































    Registered to ISO 9001
    Certificate TW12/11128



Triple Band Pass Filter


* 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
Triple Band Pass Filter

The TBF (triple band pass filter) contains one or two complete pass band, one low pass band or one high pass band.
Please refer to the graph below.

A common application is to pass two bands of the forward path signals/ channels and return path band.
But it also has other combine of pass bands according to customer's system needs.

The circuit architecture of this triple band pass filter was invented by Soontai.

We can design filters with more than 3 passbands, and even more, and according to your specifications.

Soontai's triple band pass 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.

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.

Model 1st
Pass Band
Pass Band
Pass Band
Reject Band
Reject Band
5-42 MHz 88-120 MHz 515-1000 MHz 55-76 MHz 136-475 MHz
5-42 MHz 400-450 MHz 550-1000 MHz 55-350 MHz 480-510 MHz
10-90 MHz 499-519 MHz 625-645 MHz 95-469 MHz 564-589 MHz
30-117 MHz 170-272 MHz 742-1000 MHz 0.3-22 MHz 128-163 MHz
291-355 MHz 498-562 MHz 762-1000 MHz 5-283 MHz 364-480 MHz
  Electrical Curve ( TBF-5-42/88-120/510-1000 )

Insertion Loss  |  Return Loss
SPAN 1000MHz
Fig 1

Insertion Loss  |  Return Loss
Fig 2
  General Specifications
  Item TBF - 5-42 / 88-120 / 510-1000
  Impedance 75 ohm
  Frequency Range 5 - 1000MHz
  1st Pass Band 5 - 42 MHz
  2nd Pass Band 88 - 120 MHz
  3rd Pass Band 510 - 1000 MHz
  1st Reject Band 55 - 76 MHz
  2nd Reject Band 136 - 475 MHz
  1st Pass Band Insertion Loss 0.5dB (typ)  /  1.6dB (max)
  2nd Pass Band Insertion Loss 1.0dB (typ)  /  2.5dB (max)
  3rd Pass Band Insertion Loss 1.0dB (typ)  /  3.0dB (max)
  1st, 2nd Pass Band Return Loss 20dB (typ)  /  16dB (min)
  3rd Pass Band Return Loss 18dB (typ)  /  14dB (min)
  Reject Band Rejection 50dB (min)
  Dimensions (incl. M/F connectors) 21(¢) x 91(L) mm
  Net Weight 72g
 * Specifications may be change depending on the model or customer's requirement.


(c) Copyright Soontai Tech Co., Ltd.   All Right Reserved.