Custom RF Filters 0.1 Mhz to 40 Ghz

The passive components available in the Bree Engineering custom product lines include a broad range of both performance characteristics and unique applications. Filters cover the 0.1 Mhz to 40 Ghz range in Lowpass, Highpass, Bandpass, Bandstop and Multiplexing. 1% to multi-octave 3dB bandwiths are available. These filters can be configured in a number of formats to realize very simple to highly complex filter schemes. While Bree Engineering specializes in surface mount products these same designs can be packaged in more traditional pin outs and connectorized versions. Bree Engineering is capable of providing distributed element type filters, comblines and interdigitals.

Bree Engineering can efficiently design and produce drop-in replacements providing a competitive alternative source. contact our sales team for details.
Our products are available in any Configuration, contact our sales team for details.




RF Diplexer


This Diplexer is an example of the custom RF Filter Diplexers that we are able to design and manufacture at Bree Engineering.


RF Triplexer

One of Bree Engineering’s Triplexers, with female SMA connectors out from channels 1, 2, and 3 along with a Type-N Female common input.

RF Diplexer


This RF Diplexer is an example of the custom RF Filter Diplexers that we are able to design and manufacture at Bree Engineering.


RF Diplexer

One of Bree Engineering’s RF Diplexer, with female SMA connectors out. This particular Diplexer also works out to 25 GHz.

High pass filter 2-18 GHz

This filter suppresses signals below 1.65 GHz by more than 40 dB, and passes signals from 2.0 GHz to 18.0 GHz with less than 1.0 dB if insertion loss and typically more than 17 dB of return loss in the passband. This filter is available from stock.


Non-Reflective Filter

With typical performance of a six-section filter this unique design utilizes internal circuitry to absorb all mismatch well into the extended passband.

Broadband Multiplexer


This is a diplexer and is part of a series of Broadband Multiplexers offered by Bree Engineering.


Combline Filter

Bree Engineering’s 7 section high Q filter at 1.7 GHz

2042.5 MHz Telemetry Bandpass Filter

This filter passes 1900 MHz to 2185 MHz with 14.0 dB minimum return loss in the passband. The surface mount package size is 1.5 X 0.3 X 0.2 inches. (Other configurations are available.)


High Power Lowpass Filter

Bree Engineering’s 13 element elliptic low-pass filter. Its construction allows for handling 120 watts CW power.

GPS Switched Filter

These multi-channel switched filter banks cover from 100MHz up to 8 GHz and are now in production. We offer customizable multi-channel, TTL Controlled Switched Filter Banks that use a +5 volt DC bias and a 0V/+5V control logic (3.3vdc optional). Units are available 2 or more channels, and using any of the filters currently manufactured by Bree Engineering, with custom band breaks as required. Typical switching speed is 10 – 200 µsec. Rejection up to 70dBc.


Miniature Combline Cavity Filter

This cavity filter combines high performance with a small foot print.

Data Link Filter

A series of miniature filters includes a surface mount data link transmitter cleanup filter.


Asymmetrical Filter Bank

800097 – 800099
This bank of three filters utilizes a non-symmetrical skirt selectivity response to minimize size and costs while maximizing specialized custom requirements.

Low Profile Surface Mount LC Filter

Bree Engineering’s 5 section high performance lumped element filter designed into a low profile SMT package.


High Power Band Splitter

A series of high power filters includes a diplexer capable of splitting the UHF and GPS bands while handling 50 watts of contiguous power.

LC Multichannel Transceiver

Bree Engineering model number 800825 is one in a series of 4 filters.


High Power Bias T

Bree Engineering part number 800105 is a three port biased T capable of handling over 1,000 watts dc and 10 watts of RF power.

GPS Diplexer

A diplexer for the GPS bands of L1 and L2.


Image Reject Combline Filter

Bree Engineering model number 800552 is a 4 section high Q combline filter at 1.4 GHz.

GPS Diplex Band Splitter

A series of filters includes a surface mount package with a common input to high pass and low pass filters.


Ultra High Q Lumped Element Filter

Bree Engineering part number 800150 is used as the IF discriminator filter in a High Probability Tracking Radar (HPTR).

High pass / Lowpass Diplexer

A family of elliptic function diplexers optimized for extended 50 ohm match.


High Pass Filter

A Series of high pass filters includes a broadband image cleanup filter.

Broadband Filter Bank

800300 – 800302
This bank of three filters utilizes a broadband filter synthesis technique to realize highly selective filtering for the 1.7 GHz IF band.


Clean up High Pass Filter

A series of high pass filters includes a broad band image cleanup filter.

PCB Mounted LC Filter

Bree Engineering’s 4 section high performance lumped element filter at 700 MHz.


Clean up Lowpass Filter

A Lowpass filter in a coaxial package for interface outside the system package.

Surface Mount LC Filter with Leads

Bree Engineering’s high density surface mount filter featuring gull wing lead pins for input, output and grounding.


Bandreject Cellular/PCS Test Station Cleanup Filter

This series of bandreject filters far exceeds the applications original needs. The passbands of interest are the cellular at 700 to 894 MHz and the PCS at 1850 to 2000 MHz.