Double Band Pass 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

Item	DBF - 85-225 / 382-600
Impedance	75 ohm
Frequency Range	5 - 1000MHz
1st Pass Band	85 - 225 MHz
2nd Pass Band	382 - 600 MHz
1st Reject Band	5 - 75 MHz
2nd Reject Band	249 - 355 MHz
3rd Reject Band	640 - 1000 MHz
1st Pass Band Insertion Loss	1.8dB (typ) / 2.5dB (max)
2nd Pass Band Insertion Loss	2.8dB (typ) / 3.5dB (max)
Pass Band Return Loss	20dB (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.

The double band pass filter contains two complete pass bands. Please refer to the graph below.

A common application is to pass two bands of the forward path signals/ channels.

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

We can design filters with more than 3 passbands, and even more. Please refer to our triple band pass filters.

Soontai's double 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.

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.

BACK