High-frequency module
First Claim
1. A high-frequency module comprising:
- a filter component including;
a first terminal to which an RF signal is input;
a first filter through which the RF signal input to the first terminal passes;
a second terminal that outputs the RF signal that has passed through the first filter;
a third terminal; and
a first inductor including one end connected to the first filter and another end connected to the third terminal;
a module substrate on which the filter component is mounted; and
a second inductor that is provided, inside the module substrate, directly below the filter component in plan view and includes one end connected to the third terminal and another end connected to ground;
whereinthe first filter includes;
a plurality of series arm resonators that are arranged in a series arm that connects an input terminal and an output terminal of the first filter; and
a plurality of parallel arm resonators that are connected to the series arm;
whereinthe one end connected to the first filter of the first inductor is connected to at least one of the plurality of the parallel arm resonators; and
a first wiring electrode that defines the first inductor and a second wiring electrode that defines the second inductor at least partially overlap in plan view.
1 Assignment
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Accused Products
Abstract
In a high-frequency module, first and second inductors that adjust attenuation characteristics of a first filter of a filter component, are separated from each other such that the first and second inductors readily magnetic field couple with each other. Consequently, an amount of wiring used to define a first wiring electrode inside the filter component is reduced and a number of layers of a package substrate and the profile of the filter component are reduced. Consequently, variations in the attenuation characteristics of the first filter caused by the first wiring electrode electromagnetic-field coupling with another wiring electrode are prevented. The attenuation characteristics of the first filter is easily adjusted and improved by adjusting the inductance value of the second inductor.
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Citations
20 Claims
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1. A high-frequency module comprising:
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a filter component including; a first terminal to which an RF signal is input; a first filter through which the RF signal input to the first terminal passes; a second terminal that outputs the RF signal that has passed through the first filter; a third terminal; and a first inductor including one end connected to the first filter and another end connected to the third terminal; a module substrate on which the filter component is mounted; and a second inductor that is provided, inside the module substrate, directly below the filter component in plan view and includes one end connected to the third terminal and another end connected to ground;
whereinthe first filter includes; a plurality of series arm resonators that are arranged in a series arm that connects an input terminal and an output terminal of the first filter; and a plurality of parallel arm resonators that are connected to the series arm;
whereinthe one end connected to the first filter of the first inductor is connected to at least one of the plurality of the parallel arm resonators; and a first wiring electrode that defines the first inductor and a second wiring electrode that defines the second inductor at least partially overlap in plan view. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification