Abstract ▼ AI-Helper

Ultra-compact UHF tunable band-pass filter (BPF) of symmetrical and asymmetrical structure is embedded into multi-layered organic packaging substrate with high dielectric composite film. For embedding the tunable filter circuit into the packaging substrate, it is modified by using a scalable lumped ...

Ultra-compact UHF tunable band-pass filter (BPF) of symmetrical and asymmetrical structure is embedded into multi-layered organic packaging substrate with high dielectric composite film. For embedding the tunable filter circuit into the packaging substrate, it is modified by using a scalable lumped circuit model instead of using magnetically coupled resonant circuit. Since most of conventional TV receiver tuners utilize magnetically coupled circuit, which are composed of several passive components and air core inductors assembled and controlled manually, there are several problems such as large size, difficulty in tuning, and high cost. The fabricated tunable filter is optimally designed to obtain high performances by using high Q spiral stacked inductors, high dielectric SrTiO3 composite metalinsulator- metal (MIM) capacitors, and surface mounted varactor diodes. It exhibited low insertion loss, large tuning range, and tunable frequency range from 500 MHz to 900 MHz. It has extremely compact size and volume of 3.4 x 4.4 x 0.6 mm3, which is the smallest one in the reported tunable filters for TV tuner receivers. These embedded band-pass filters and passive components are accurately modeled and simulated by using 2D (ADS) and 3D EM (HFSS) simulation tools.

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