“…The rapid progression of millimeter‐wave communication and radar systems has promoted the development of advanced microwave dielectric ceramic components, such as dielectric resonators, filters, antennas, substrates, etc., capable of delivering exceptional performance at elevated operating frequencies
1–3 . Since low polarization at high frequencies benefits reduced noise and inductive crosstalk and decreased signal transmission delay in dielectrics (
), materials with a low dielectric constant ( ε r ) have garnered significant attention and research efforts in recent years
4,5 . In addition, attaining superior frequency selective characteristics and temperature stability requires a large quality factor ( Q × f ) and a near‐zero temperature coefficient of resonance frequency ( τ f )
6–9 …”