Soontai Tech Co., Ltd.
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- a trusted partner, provide the better choice for you.
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    Certificate TW12/11128



Low Pass Filter


* Class A RFI Shielding

* Low Loss

* High Rejection

* Excellent Return Loss

* Flat Passband

* High Stability

* DC Power Pass

* Excellent Mechanical Structure

* Precision Connector Thread

* Exquisite Plating Quality

* Waterproof (alternative)

* Patented Housing
Satellite-IF Low Pass Filter

This low pass filter series is primarily designed for use in satellite receiving systems to pass satellite-IF frequency and filter out unwanted frequencies or interference frequencies (eg, high-band satellite signals, WiFi, 802.11, Bluetooth, etc.).

Soontai's low pass filters provide many features (see below).

1. 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 accroding to your specifications.

For more filter information please see the filter profile technical notes in our Tech Support.

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

Model Pass Band Model Pass Band
LPF - 1450 5 - 1450 MHz LPF - 1750 5 - 1750 MHz
LPF - 1800 5 - 1800 MHz LPF - 2150 5 - 2150 MHz
  Electrical Curve ( LPF-1750 )

Insertion Loss  |  Return Loss
Fig 1

Insertion Loss  |  Return Loss
Fig 2
  General Specifications
  Item LPF - 1750 LPF - 1750B
 DC Power Pass DC 30V / 500mA (max) Blocked
  Impedance 75 ohm
  Pass Band 5 - 1750MHz
  Insertion Loss 0.5dB (typ)  / 2.5dB (max)
 Return Loss 20dB (typ)  / 12dB (min)
 Stop Band 2 - 3GHz
  Rejection 55dB (typ)  / 50dB (min)
  Dimensions (incl. M/F connectors) 21(¢) x 57 mm
  Net Weight 48g
 * Specifications may be change depending on the model or customer's requirement.


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