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Tier Trap Filter
 
 
    Features
 
* CE Approved, Class A RFI Shielding

* SMD, High Stability

* High Rejection

* Low Loss

* Excellent Return Loss

* Waterproof (alternative)

* Patented Housing

* Suitable for CATV and
  other communication systems
     
Also Recommended


BRF : Band Reject Filter

More ... : Filter series
Introduction

Tier trap filters have two passbands, one on each side of the reject band. They are used for filtering out some channels in CATV reception systems or for application in other communication systems.

Soontai's tier trap filters have many features (see below).

1. Sharp and deep reject band, provides excellent rejection capabilities to
    clear undesired signal.

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 copper tubes provide the best electromagnetic interference(EMI) protection.

The table below shows popular TTF series filter models.
We can design other models according to your specifications.

For more filter infomation 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 Stop Band Model Stop Band
TTF - 20-42 20 - 42 MHz TTF - 265-279 265 - 279 MHz
TTF - 88-108 88 - 108 MHz TTF - 374-390 374 - 390 MHz
TTF - 112-126 112 - 126 MHz TTF - 415-481 415 - 481 MHz
TTF - 118-174 118 - 174 MHz TTF - 454-470 454 - 470 MHz
TTF - 195-209 195 - 209 MHz TTF - 526-544 526 - 544 MHz
  Electrical Curve ( TTF-118-174 )

Rejection over 50dB
 
Fig 1

Insertion Loss  |  Return Loss
SPAN 1000MHz
Fig 2
  General Specifications
  Item TTF - 118-174
  Impedance 75 ohm
  Frequency Range 5 - 1000MHz
  Insertion Loss (5-102MHz) 0.5dB (typ) / 2.5dB (max)
  Insertion Loss (198-1000MHz) 0.5dB (typ) / 2.5dB (max)
  Return Loss 20dB (typ) / 12dB (min)
  Rejection (118-174MHz) 50dB (min)
  Dimensions (incl. M/F connectors) 21(¢) x 74(L) mm
  Net Weight 52g
 Specifications may be change according to customer's requirements.

 

 
 

SOONTAI  TECH  CO.,  LTD.
No.43, Huangong Rd., Yongkang Dist., Tainan City 710, Taiwan
TEL: 886-6-2016969   FAX: 886-6-2013939   E-mail: soontai@soontai.com