Soontai Tech Co., Ltd.
  Soontai - a world-wide well-known manufacturer of catv filter solutions;
- a trusted partner, provide the better choice for you.
 
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    SOONTAI TECH CO., LTD.
    Registered to ISO 9001
    Certificate TW12/11128
 
         

 

 

Window 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
 
Window Filter
 
Introduction

The window filter contains one band-pass and one low-pass and / or one high-pass.

A common application is to pass the return path signals and one band of the forward path signals. Or to filter out the return path signal/ low frequency channels and pass a band of forward path and a higher forward path signal/ channels. Please refer to the graph below.

The circuit architecture of this double-passband filter was invented by Soontai.

It can be used to filter out signals/channels in two bands that are unwanted in a CATV receiving system, and can also be applied to other communication systems.

Soontai's window 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 1st Pass Band 2nd Pass Band 1st Stop Band 2nd Stop Band
WF-5-42/103-121 5 - 42 MHz 103 - 121 MHz 50 - 92 MHz 136 - 1000 MHz
WF-5-42/216-260 5 - 42 MHz 216 - 260 MHz 55 - 190 MHz 290 - 1000 MHz
WF-5-65/220-260 5 - 65 MHz 220 - 260 MHz 85 - 195 MHz 290 - 1000 MHz
WF-85-280/750-1000 85 - 280 MHz 750 - 1000 MHz 5 - 65 MHz 310 - 700 MHz
WF-150-220/680-1000 150 - 220 MHz 680 - 1000 MHz 5 - 125 MHz 250 - 640 MHz
  Electrical Curve ( WF-5-42/103-121 )

Insertion Loss and Rejection
SPAN 200MHz
Fig 1

Insertion Loss  |  Return Loss
SPAN 200MHz
Fig 2
  General Specifications
  Item WF - 5-42/103-121
  Impedance 75 ohm
  Frequency Range 5 - 1000MHz
  1st Pass Band 5 - 42 MHz
  2nd Pass Band 103 - 121 MHz
  1st Reject Band 50 - 92 MHz
  2nd Reject Band 136 - 1000 MHz
  Insertion Loss (5-42MHz) 0.5dB (typ) / 2.0dB (max)
  Insertion Loss (103-121MHz) 2.0dB (typ) / 3.0dB (max)
  Return Loss (5-42MHz / 103-121MHz) 20dB (typ) / 14dB (min)
  Rejection (50-92MHz / 136-1000MHz) 55dB (typ) / 50dB (min)
  Dimensions (incl. M/F connectors) 21(¢) x 73(L) mm
  Net Weight 52g
 * Specifications may be change depending on the model or customer's requirement.

 

 
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