摘要:
The invention relates to a filter chip (1) comprising an interconnection of at least one first resonator (2) operating by means of acoustic bulk waves, to a second resonator (3) operating by means of acoustic bulk waves. The first resonator (2) operating by means of acoustic bulk waves has a first piezoelectric layer (4) that is structured such that the resonance frequency of the first resonator (2) is lower than that of the second resonator (3). The first piezoelectric layer (4) and/or a second piezoelectric layer (7) of the second resonator (3) operating by means of acoustic bulk waves can be structured such that grooves (14) extend in a vertical direction through the first and/or second piezoelectric layer.
摘要:
Disclosed herein is a duplexer device having a plurality of duplexers mounted on a substrate for mounting a duplexer, for achieving an excellent isolation characteristic. The duplexer device includes a substrate for mounting a duplexer, the substrate having a rectangular shape including a first side, a second side neighboring the first side and connected to the first side, a third side facing the second side and neighboring the first side, and a fourth side connected to the second and the third sides and facing the first side, and a plurality of pads being formed on a surface of the substrate; a first duplexer configured to be mounted on the substrate for mounting a duplexer and to include a first antenna terminal, a first transmission terminal and a first reception terminal; and a second duplexer configured to be mounted on the substrate for mounting a duplexer and to include a second antenna terminal, a second transmission terminal and a second reception terminal. The first antenna terminal and the second antenna terminal are electrically connected to pads for an antenna, respectively, which belong to the plurality of pads and are disposed along the first side. The first reception terminal and the second reception terminal are electrically connected to pads for reception, respectively, which belong to the plurality of pads and are disposed along the second side. The first transmission terminal and the second transmission terminal are electrically connected to pads for transmission, respectively, which belong to the plurality of pads and are disposed along the third side.
摘要:
L'invention a pour objet un circuit résonant comprenant une borne d'entrée (Pe) et une borne de sortie (Ps) et au moins : - un groupe de N résonateurs avec N ≥1, ayant la même fréquence de résonance et la même fréquence d'antirésonance ; - un premier et un second éléments d'adaptation d'impédance (Cs, Cp) présentant une réactance non nulle, le premier élément étant en série avec ledit groupe de résonateurs, et le second élément étant en parallèle avec ledit groupe de résonateurs
ledit circuit résonant comprenant : - des premiers moyens de commande dudit groupe de résonateurs permettant de fixer la capacité statique (C 0 ) dudit groupe à une première valeur ; - des second moyens de commande permettant de fixer l'impédance du premier élément et celle du second élément à des secondes valeurs ;
lesdites première et secondes valeurs étant telles que : le triplet de valeurs : capacité statique dudit groupe / impédance du premier élément/ impédance du second élément (C 0 , Cs, Cp) permet de déterminer le triplet de paramètres suivants : o l'impédance caractéristique Z c de l'ensemble constitué par ledit groupe, ledit premier élément d'adaptation d'impédance et ledit second élément d'adaptation ; o la fréquence de résonance ω r dudit ensemble; o la fréquence d'antirésonance ω a dudit ensemble,
pour stabiliser l'impédance dudit circuit à une impédance caractéristique choisie.
摘要:
A duplexer includes an antenna terminal (Ant),a first filter (10) connected to the antenna terminal, and a second filter (20) connected to the antenna terminal. At least one of the first filter and the second filter is a ladder type filter in which a parallel resonator (P1, P2, P1', P2') and multiple series resonators (S1-S4, S1'-S4') are included, one or more first inductors (L1, L1') are respectively connected in parallel with one or more series resonators out of the multiple series resonators. The or one such first inductor (L1, L1') is connected in parallel with one of the multiple series resonators that is arranged closest to the antenna terminal.
摘要:
An acoustic wave device includes an input terminal (Ant); a balun (20) that is connected to the input terminal, converts a signal input from the input terminal into two anti-phase signals (Rx1,Rx2), and outputs the two anti-phase signals; and a filter (30) that is connected to the balun, and outputs the two anti-phase signals input from the balun as balanced output signals. An output impedance of the balun is equal to an input impedance of the filter, and is larger than an output impedance of the filter.