Tunable Filters TRIZ Cases

A switch matrix and multiplex passive filter route RF signals through acoustic resonator blocks to widen spectrum coverage without losing selectivity.

Negative-capacitance tuning cancels resonator current and capacitance, improving RF rejection across frequency ranges without structural changes.

Switchable filter subsections raise out-of-band attenuation only when interference appears, limiting insertion loss, space, and power use.

A tapered IDT period and parallel capacitors improve right-side band attenuation in a surface acoustic wave filter.

A shiftable acoustic filter passband aligns TX and RX channels in UNII-4/5 bands to cut self-interference and preserve throughput.

A switched parallel resonator raises frequency shift while preserving passband width in acoustic wave filters for dual-band RF front ends.

Multiple switched acoustic resonator units create a continuous wide tuning range without the size and cost of traditional tunable wireless filters.

Switching among acoustic resonators with different base frequencies broadens tunable filter band coverage while preserving attenuation and low insertion loss.

A magnetostrictive film in the SAW path enables wide-range RF tuning with low insertion loss, avoiding bulky or complex filter banks.

Multiple switched acoustic resonators broaden tunable filter frequency range while keeping the filter compact for wireless systems.

Using Love waves, variable capacitance, and band-extension inductance, this filter widens tuning range while keeping low loss and steep response.