400MHz low-pass filter, RF coaxial LC, LPF, SMA interface

Product Description

This product is a 5th-order parallel Chebyshev type low-pass filter with a passband (< 400MHz) insertion loss of less than 1.5dB. Relying on our excellent production and manufacturing process, the insertion loss of this filter can still be greater than 30dB when the high-end frequency extends to 2.5GHz, and the high-end frequency has no abnormal fluctuations. The performance index is far better than other products processed using PCB bare boards. It is dedicated to strongly suppressing secondary, tertiary harmonic, and clutter frequency signals in 300-400MHz small and medium power transmission systems. Our store can also design and customize filters of other frequencies according to customer requirements.

Model: FLP-400

Impedance: 50 Ohms

Interpolation Loss: < = 1.5 dB @400 MHz

～ 30 dB @ 800 MHz( 400 x 2)

> 40 dB @ 1200 MHz ( 400 x 3)

> 30 dB @ 1 ~ 2.5 GHz

Maximum load capacity: 3 W (35 dBm)

Frequency response chart:

Circuit Pattern:

Interface: SMA-M, SMA-F

Exterior size:

Pros & Cons

Pros

5th-order Chebyshev design provides sharp cutoff and low passband insertion loss
High attenuation of over 30dB at 2.5GHz for effective high-frequency signal blocking
SMA coaxial interface for easy, secure RF connections
Strict manufacturing standards ensure consistent high quality

Cons

Not compatible with RF systems operating above 400MHz without additional filtering
No included mounting hardware or installation guides
No custom frequency configuration options available
No official brand name listed, so some users may prefer certified industrial RF components

Common Questions

What type of filter is this product, and what is its cutoff frequency?

This is a 5th-order parallel Chebyshev type low-pass RF filter with a passband cutoff frequency below 400MHz.

What insertion loss can be expected in the passband, and how much attenuation is provided at high frequencies?

Passband insertion loss is less than 1.5dB, and attenuation at frequencies up to 2.5GHz is greater than 30dB.

What interface type does this RF filter use?

This filter features an SMA coaxial interface for secure, reliable RF connections.

What are the primary uses for this low-pass filter?

It is used to block high-frequency RF signals above 400MHz, ideal for radio, communication, and RF circuit filtering applications.

Is this product new, and where is it sourced from?

This is a new, high-quality RF filter sourced from Mainland China with no harmful high-concern chemicals.

Specifications

Product Description

Pros & Cons

Pros

Cons

Common Questions