Surface acoustic wave apparatus and communication apparatus
First Claim
Patent Images
1. A surface acoustic wave apparatus comprising:
- a package having external terminals;
a first surface acoustic wave filter including signal terminals and having relatively low pass-band frequencies; and
a second surface acoustic wave filter including signal terminals and having relatively high pass-band frequencies;
whereinthe first and second surface acoustic wave filters are integrated into the package;
one signal, terminal of each of the first and second surface acoustic wave filters is connected to a common terminal;
the signal terminals, disposed at the common terminal sides, of the respective first and second surface acoustic wave filters are connected to different external terminals of the package through different paths that are isolated from each other, and each of the signal terminals is connected by a signal line of an external circuit;
the first and second surface acoustic wave filters are connected to the common terminal through a transmission line outside the package;
the common terminal and the transmission line define a coupling section located outside of the package such that the common terminal and the transmission line are spaced outwardly away from a side surface of the package; and
a matching device is connected in parallel to the first and second surface acoustic wave filters, at the coupling section located outside of and spaced away from the package.
1 Assignment
0 Petitions
Accused Products
Abstract
A surface acoustic wave apparatus includes a first filter and a second filter, which are integrated into one package, and, filter signal terminals of the first and second filters are connected to package signal terminals of the package through different paths which are insulated from each other. A signal line extended from filter signal terminals is connected to one common terminal outside the package. The signal line and the common terminal define a coupling section. An inductance device is connected in parallel to the coupling section as a matching circuit.
11 Citations
20 Claims
-
1. A surface acoustic wave apparatus comprising:
-
a package having external terminals; a first surface acoustic wave filter including signal terminals and having relatively low pass-band frequencies; and a second surface acoustic wave filter including signal terminals and having relatively high pass-band frequencies;
whereinthe first and second surface acoustic wave filters are integrated into the package; one signal, terminal of each of the first and second surface acoustic wave filters is connected to a common terminal; the signal terminals, disposed at the common terminal sides, of the respective first and second surface acoustic wave filters are connected to different external terminals of the package through different paths that are isolated from each other, and each of the signal terminals is connected by a signal line of an external circuit; the first and second surface acoustic wave filters are connected to the common terminal through a transmission line outside the package; the common terminal and the transmission line define a coupling section located outside of the package such that the common terminal and the transmission line are spaced outwardly away from a side surface of the package; and a matching device is connected in parallel to the first and second surface acoustic wave filters, at the coupling section located outside of and spaced away from the package. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 19)
-
-
13. A surface acoustic wave apparatus comprising:
-
a package having external terminals; a bandpass filter including signal terminals and having relatively low pass-band frequencies provided in the package; and a bandpass filter including signal terminals and having relatively high pass-band frequencies provided in the package; wherein a signal terminal of each of the first and second bandpass filters are connected to one another; and at least one of said signal terminals of each of the first and second bandpass filters is connected to a respective different external terminal of the package through different paths Isolated from each other, and each of the signal terminals is connected by a signal line of an external circuit;
whereinthe first and second bandpass filters are connected to a common terminal through a transmission line outside the package; the common terminal and the transmission line define a coupling section located outside of the package such that the common terminal and the transmission line are spaced outwardly away from a side surface of the package; and a matching device is connected in parallel to the first and second bandpass filters at the coupling section located outside of and spaced away from the package. - View Dependent Claims (14, 15, 16, 17, 18, 20)
-
Specification