Diplexer – 803683

This Diplexer utilizes two ports that allows two different types of filters to fit into one package. The most common topology we use, typically involves a High Pass and Lowpass combination. For this particular low frequency diplexer, we were able to maintain our simulated design on the test bench.

This particular Diplexer provides a lowpass passband between 663 and 915 MHz with low Insertion Loss and consistent Return Loss. The lowpass channel also contains a solid 50 dB of isolation from the high pass and carries out this isolation through 12.81 GHz. Our high pass portion maintains low loss through the passband of 1130 to 12810 MHz while keeping a consistent VSWR through the same passband. The opposing isolation from the lowpass is set to 60 dB and maintained through the extended rejection out to 12810 MHz. With our wide range of diplexers that we have been able to achieve here at Bree Engineering this particular low frequency diplexer displays our ability to maintain performance over wide bands. Although, different specifications will different responses Bree Engineering is ready to tackle the task of various Diplexer designs.

As with all of our Filters here at Bree Engineering the design is custom and tailored to the specifications of our clients. For every custom specification provided to us we are willing to provide simulations and expected performances of the desired filter. We are always striving to do our best to design, build and tune filters of any type.


Please see the attached Filter Test Data for the performance of the filter.

Package Size: 1.00 x 1.00 x 0.40 Inches

Configuration: SMA-F Connectors

Insertion Loss:

Channel 1: <1.00 dBa 663 MHz – 915 MHz

Channel 2: <1.70 dBa 1130 MHz – 6000 MHz

Channel 2: <1.00 dBa 6000 MHz – 12810 MHz

Return Loss:

Channel 1: >17 dB 663 MHz – 915 MHz

Channel 2: <17 dB 1130 MHz – 6000 MHz

Channel 2: <15 dB 6000 MHz – 12810 MHz


Channel 1: >50 dBc 1130 MHz – 3660 MHz

Channel 1: >40 dBc 3660 MHz – 12810 MHz

Channel 2: >60 dBc 663 MHz – 915 MHz