RF & Microwave Filters

filter design

Specializing in high-performance solutions, the company designs, develops and manufactures RF, microwave filters in the area of emerging applications for both military and commercial markets.
Filters are one of the fundamental building blocks of RF and microwave systems, along with amplifiers, oscillators, mixers, and switches. These important passive components are used to obtain a precise frequency response. Filter design and realization can be challenging for several reasons. No one technology or filter topology is suitable for all applications, mainly due to limitation imposed by the relationship between unloaded Q and volume. We know that your filter requirement is unique and can require a custom package, low insertion loss or critical pass bands for instance. Whether your requirement is an industry standard or completely unique, our technical staff specializes in engineering custom solutions. Utilizing state-of-the-art synthesis and modeling software such as ADS, Momentum, HFSS and Ansoft Designer, each filter solution is designed to match superior performance in the smallest footprint possible.

Elliptika has built its reputation on designing the most challenging RF & Microwave filters in the industry and that is why so many RF engineers trust their filter needs to us. We remain on the leading edge of microwave filter design through innovative and R&D programs, working with the best "assembly" network, and by utilizing the most advanced microwave design software available on the market today.


Planar Technology

Filters in planar form can be built using several different topologies and technology process. Various single and multilayer ceramic and soft substrate (PCB) technologies are available to fit your need. We will cover the more common distributed topologies including edge-coupled, hairpin, and interdigital. More recent coupled and cross-coupled loop topologies will also be presented. At lower microwave frequencies a pseudo-lumped approach using printed inductors and capacitors is more space efficient.   

Semi-Lumped Element Technology

Filters are designed by using discrete components like inductances and capacitors with coaxial resonators. This technology gives optimal performance, where the size is critical in RF band.

Semi-Planar/Semi-volumic technology

Substrate integrated waveguide (SIW) is an new form of transmission line

Non-Planar Technology / Volumic

When higher unloaded Q is required, we often turn to cavity combline, waveguide, or coaxial dielectric resonator filters.  Meeting customer requirements often requires additional transmission zeros in the stopbands, which are realized using various types of cross-couplings. Some applications also call for these high performance filters to be diplexed or multiplexed.         

Switchable, Tunable Filters

Switch filter designs can be from 2 to 6 independent channels that can be switched, utilizing pin diode, varactor switch topology or MEMS


The different kind of filter functions : Bandpass, Lowpass, Highpass, Band Reject, Diplexers, Triplexers, Multiplexers, biband...


Let us help you design the best filter to meet your unique specifications. We design the best filter to fit your needs