Balanced-type strip-shaped dielectric substrate integrated filter

Abstract

A balanced-type strip-shaped dielectric substrate integrated filter includes: a high-k dielectric substrate; and first low-k dielectric substrates, second low-k dielectric substrates and metal grounds are symmetrically stacked on upper and lower surfaces of the high-k dielectric substrate. Compared with an existing balanced-type dielectric filter, a high Q-value strip-shaped dielectric substrate integrated resonator with a packageable characteristic which works in TMmode and employs strip-shaped dielectric blocks with double grooves, combined with air groove structures of upper and lower layers and a packaging substrate is proposed, so that problems that cost is high and self-packaging cannot be realized of the existing balanced-type dielectric filter when being implemented by combining ceramic dielectric with a metal chamber structure can be solved, and thereby a balanced-type strip-shaped dielectric substrate integrated filter with the characteristic of low loss is realized; and meanwhile the filter may have advantages of self-packaging, high integration level and low cost.