Mini-Circuits

Beginning in 1965 and for approximately 50 years, transistor density in integrated circuits followed Moore’s Law. Yet during the last 15 years, active RF electronics have evolved into the RF System-on-a-Chip (RF SoC) and RF System-in-a-Package (RF SiP) approaches, which have led to significant SWaP-C (Size, Weight, Power and Cost) reduction and simultaneously enhanced processing power.

This paper explores the implementation of Mini-Circuits’ BFHK-series high-rejection LTCC filters in a coplanar waveguide (CPW) environment using a novel interposer board and related effects on filter rejection. Real test data from a leading customer’s evaluation of these filters in a channelized housing is presented demonstrating comparable rejection performance to that of stripline implementations in the range of 70 to 90 dB.

Recent debate about potential interference between 5G network equipment operating in C-band frequencies and radar altimeter (RA) receivers onboard commercial aircraft has highlighted the need for high-Q filtering solutions in crowded spectral environments. This paper presents two Mini-Circuits filters fabricated using ceramic resonator and cavity technologies designed specifically to eliminate interference by 5G C-Band emissions when incorporated either within or in line with the RA assembly.