Back to results
US 6,060,960 AGranted
Duplexer comprising a SAW filter disposed on a multi-layer substrate
AssigneeMurata Manufacturing Co., Ltd.
InventorsKoji Tanaka, Norio Nakajima
Life of this patent
Estimating the term…
Abstract
A duplexer includes a high-frequency switch, an LC filter serving as a low-pass filter, and an SAW filter serving as a band-pass filter. The high-frequency switch includes diodes, capacitors, and transmission lines. The LC filter includes capacitors and transmission lines. The high-frequency switch and LC filter are built into a multi-layer ceramic substrate, while the diodes of the high-frequency switch and the SAW filter are mounted on the substrate. The substrate is made of a low-temperature-baked ceramic material.
Claims11
A duplexer comprising:
- a multi-layer substrate comprising a plurality of laminated, cofired dielectric layers;
- at least one high-frequency switch comprising a diode mounted on said multi-layer substrate and a transmission line and a capacitor within said multi-layer substrate, said transmission line and said capacitor each being formed by respective conductors on a plurality of said layers;
- and
- at least one SAW filter disposed on said multi-layer substrate;
- wherein said high-frequency switch and said SAW filter are interconnected by conductors on respective layers within said multi-layer substrate.
2 more elements
A duplexer comprising:
- a multi-layer substrate comprising a plurality of laminated, cofired dielectric layers;
- at least one high-frequency switch comprising a diode mounted on said multi-layer substrate and a transmission line and a capacitor within said multi-layer substrate, said transmission line and said capacitor each being formed by respective conductors on a plurality of said layers;
- at least one SAW filter disposed on said multi-layer substrate;
- and
- at least one LC filter comprising a transmission line and a capacitor each formed by respective conductors on a plurality of layers within said multi-layer substrate;
- wherein said LC filter, said high-frequency switch and said SAW filter are interconnected by conductors on respective layers within said multilayer substrate.
3 more elements
Dependencies are inferred from the claim text.