To manage signal purity in communications and test systems, no component is more important than RF filters. To meet the needs of these advanced systems, Mini-Circuits’ suspended substrate stripline filter products offer state-of-the-art performance featuring unique passband, stopband characteristics and outstanding reliability in harsh operating environments. The range of available filter types supports the needs of military, aerospace and commercial systems, including instrument systems, ultra-broadband receivers, laboratory testing, 5G and many other wideband communications systems.

Mini-Circuits’ reflectionless filters are the only commercially available filters that absorb and internally terminate stopband signals rather than reflecting them back up the signal chain. Based on a novel, patented filter topology and produced with Mini-Circuits’ industry-leading MMIC design and manufacturing capability, these devices are a revolutionary solution to a number of unwanted effects related to embedding conventional filters in system designs. Our customers are finding innovative ways to achieve new levels of performance with these revolutionary products. Learn more below, and be sure to check out our full selection to see what they can do for your design!

Jacques and Pierre Curie discovered the piezoelectric effect in 1880-1881, but it would take another century for the predecessor to the modern-day ceramic coaxial resonator-based filter to be designed and described.1 Over the course of that century, and in the decades that followed, advances in materials science and manufacturing technology enabled the primitive ceramics discovered in the 1940s2 to evolve into the compact, temperature-stable, rugged, and complex bandpass filter solutions of the 21st century. Mini-Circuits boasts one of the strongest portfolios of ceramic coaxial resonator filters anywhere in the world, with unparalleled availability to 6 GHz.

RF / microwave filters are essential building blocks of practically every wireless transceiver design. Filters block undesired signals outside the application operating bandwidth while passing in-band signals through to the rest of the signal chain. At a high level, filters can be described by their response, that is, the general shape of the S21 curve in the passband, transition, and stopband. A theoretically ideal filter would have a “brick wall” response, exhibiting 0 dB insertion loss in the passband, infinite rejection beyond the frequency cut-off fc and a transition from the passband to the stopband in 0 Hz