Patent application number | Description | Published |
20090201104 | ACOUSTIC WAVE DEVICE, DUPLEXER, COMMUNICATION MODULE, AND COMMUNICATION APPARATUS - An acoustic wave device includes a ladder-type filter in which resonators are connected in a ladder configuration. In the acoustic wave device, series-connected resonators are connected in a parallel line in the ladder-type filter, and the resonators connected in the parallel line have mutually different resonance frequencies. | 08-13-2009 |
20090267707 | ELASTIC WAVE DEVICE - An elastic wave device is described which includes a piezoelectric substrate, comb-shaped electrodes having teeth electrodes that are disposed so as to face each other on the piezoelectric substrate, a non-overlapping area in which the teeth electrodes of the comb-shaped electrodes do not overlap each other, and a overlapping area in which the teeth electrodes overlap each other and the velocity of sound is higher than that in the non-overlapping area. | 10-29-2009 |
20090273408 | FILTER DUPLEXER AND COMMUNICATION DEVICE - A filter has a filter section that is provided with a balanced input terminal including a terminal | 11-05-2009 |
20100109800 | DUPLEXER, COMMUNICATION MODULE, AND COMMUNICATION DEVICE - A duplexer of the present invention includes a reception filter ( | 05-06-2010 |
20100109801 | ACOUSTIC WAVE FILTER, DUPLEXER, COMMUNICATION MODULE, AND COMMUNICATION APPARATUS - In an acoustic wave filter, a notch resonator is connected in series (or parallel) with a plurality of acoustic wave resonators connected in a ladder shape. The notch resonator has a main resonant frequency that is substantially equal to a sub-resonant frequency of the acoustic wave resonators. With this configuration, the occurrence of sub-resonant responses in filter characteristics can be suppressed, resulting in an improvement in communication characteristics. | 05-06-2010 |
20100134203 | FILTER AND ANTENNA DUPLEXER - There is provided a filter including a first resonator, a second resonator in which an excitation efficiency is reduced more than the first resonator, and an inductor connected in parallel with the second resonator. | 06-03-2010 |
20100148626 | ACOUSTIC WAVE DEVICE, COMMUNICATION MODULE, AND COMMUNICATION APPARATUS - An acoustic wave device of the present application includes a piezoelectric substrate ( | 06-17-2010 |
20100148886 | DUPLEXER, MODULE INCLUDING A DUPLEXER AND COMMUNICATION APPARATUS - A duplexer includes a common terminal, receiving filters, a transmitting filter, and a hybrid having four terminals (terminals | 06-17-2010 |
20100150075 | FILTER, DEMULTIPLEXER, AND MODULE INCLUDING DEMULTIPLEXER, COMMUNICATION APPARATUS - A demultiplexer has a common terminal, a transmission terminal, and a reception terminal, and furthermore includes a transmission filter connected between the common terminal and the transmission terminal, a reception filter connected between the common terminal and the reception terminal, and a phase shift circuit connected in series to the reception filter connected between the common terminal and the reception terminal. A node on the line from the phase shift circuit to the common terminal or the transmission terminal, and a node on the line from the phase shift circuit to the reception terminal are coupled via a reactance. Accordingly, it is possible to fundamentally reduce or eliminate the situation in which transmission signals from the transmission filter arrive at the reception circuit, and improve isolation. | 06-17-2010 |
20100188166 | FILTER, DUPLEXER AND COMMUNICATION MODULE - According to an aspect of the invention, each of a filter, a duplexer and a communication module includes a plurality of series resonators connected to a signal line in series and a plurality of parallel resonators connected to the signal line in parallel. At least two of the plurality of parallel resonators are connected to the signal line between two of the plurality of series resonators in parallel, inductors are respectively connected to the at least two parallel resonators, and the inductors have different inductances from each other. | 07-29-2010 |
20100194494 | HIGH FREQUENCY DEVICE, FILTER, DUPLEXER, COMMUNICATION MODULE, AND COMMUNICATION APPARATUS - In a high frequency device, resonators (IDT capacitors) that function as capacitors are included in a lumped constant balun included in a filter or duplexer, and furthermore, the resonance frequency of the IDT capacitors is set higher than the passband frequency of the filter. This improves the capacitor Q value, thus enabling the realization of a low-loss balance filter. | 08-05-2010 |
20100219906 | ACOUSTIC WAVE DEVICE, DUPLEXER, COMMUNICATION MODULE, COMMUNICATION APPARATUS, AND MANUFACTURING METHOD FOR ACOUSTIC WAVE DEVICE - An acoustic wave device includes a piezoelectric substrate, interdigital electrodes arranged on the piezoelectric substrate, a first dielectric element arranged between the interdigital electrodes, a second dielectric element that covers the interdigital electrodes and the first dielectric element, and an adjustment element that has been formed on the first dielectric element. The adjustment element has been formed from a material whose specific gravity is greater than that of the first dielectric element and that of the second dielectric element. | 09-02-2010 |
20100244979 | DUPLEXER, SUBSTRATE FOR DUPLEXER, AND ELECTRONIC APPARATUS - A duplexer includes a transmit filter connected between a common terminal and a transmission terminal, a receive filter connected between the common terminal and a reception terminal, a capacitor connected in parallel with one of the transmit filter and the receive filter and provided between two terminals of the common terminal, the transmission terminal, and the reception terminal, and a package. The package includes an insulating layer, foot pads that include the common terminal, the transmission terminal and the reception terminal and are formed on one surface of the insulating layer, and interconnections formed on another surface opposite to the one surface of the insulating layer. The capacitor is composed of two capacitor forming units that are connected in parallel with each other and are formed with at least one foot pad of the foot pads and two of the interconnections that overlap with two opposing sides of the at least one food pad respectively. | 09-30-2010 |