MESL Microwave designs and produces a wide range of diplexers, spanning the 6GHz to 38GHz frequency range, to address the point-to-point and point-to-multipoint radios in wireless communication infrastructure. We have E-plane and H-plane waveguide designs, using both co-axial and waveguide.

Customer designs are implemented and simulated on state of the art filter design software, which facilitates the creation of mechanical filter designs from supplied electrical specifications. In addition, MESL is able to design and implement filters using coupled iris elements, metal-insert elements and / or post-coupled elements. Simulation software also aids verification of designs which use more complex filter geometries, such as notch, multi-mode or cross-coupled cavities.

Shown below are some examples of simulated designs.

View: 23GHz diplexer.avi
Desc: 23GHz diplexer showing E-field magnitude animated with phase.

View: 26GHzLPF-fundamental.avi
Desc: 26GHz evanescent mode “ridged waveguide” harmonic filter passing fundamental frequencies

View: 26GHzLPF-harmonic.avi
Desc: 26GHz evanescent mode “ridged waveguide” harmonic filter rejecting harmonic frequencies (short circuit)

Environmental considerations are also taken into account during the design process. We have the capability to design and manufacture diplexers and couplers which are subject to extremes of temperature and weather. All materials in such a design are tested rigorously to demanding customers’ requirements.

Prototypes are crafted within our in-house machine shop before volume production quantities are machined or cast by low cost suppliers situated around the world. Diplexers have been in volume production at MESL since 2000 with a proven track record of high quality and reliability.