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1. WO2010094707 - SAW FILTER

Publication Number WO/2010/094707
Publication Date 26.08.2010
International Application No. PCT/EP2010/051989
International Filing Date 17.02.2010
IPC
H03H 9/64 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
9Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
46Filters
64using surface acoustic waves
CPC
B60C 23/0418
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES TYRE INFLATION; TYRE CHANGING OR REPAIRING; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
23Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
02Signalling devices actuated by tyre pressure
04mounted on the wheel or tyre
0408transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
0418Sharing hardware components like housing, antenna, receiver or signal transmission line with other vehicle systems like keyless entry or brake control units
B60R 25/24
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
25Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
20Means to switch the anti-theft system on or off
24using electronic identifiers containing a code not memorised by the user
G07C 2009/00261
GPHYSICS
07CHECKING-DEVICES
CTIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
9Individual registration on entry or exit
00174Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
00182operated with unidirectional data transmission between data carrier and locks
00261the keyless data carrier having more than one function
G07C 2009/00769
GPHYSICS
07CHECKING-DEVICES
CTIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
9Individual registration on entry or exit
00174Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
00753operated by active electrical keys
00769with data transmission performed by wireless means
G08C 17/02
GPHYSICS
08SIGNALLING
CTRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
17Arrangements for transmitting signals characterised by the use of a wireless electrical link
02using a radio link
H03H 9/02551
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
9Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
02Details
02535of surface acoustic wave devices
02543Characteristics of substrate, e.g. cutting angles
02551of quartz substrates
Applicants
  • EPCOS AG [DE]/[DE] (AllExceptUS)
  • TELGMANN, Thomas [DE]/[DE] (UsOnly)
Inventors
  • TELGMANN, Thomas
Agents
  • EPPING HERMANN FISCHER PATENTANWALTSGESELLSCHAFT MBH
Priority Data
10 2009 009 484.919.02.2009DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) SAW FILTER
(EN) SAW FILTER
(FR) FILTRE SAW
Abstract
(DE)
Zur Filterung zweier nahe beieinander liegender Kanäle des gleichen Frequenzbandes wird vorgeschlagen, ein SAW-Filter mit zwei Passbändern (PB1, PB2) zu verwenden, welches durch entsprechende Verschaltung von vier DMS Spuren (DMS1-DMS4) erhalten werden kann. Die Designparameter der einzelnen DMS Spuren sind so eingestellt, dass sich die je zwei Hauptresonanzen (H1-H6) zweier DMS Spuren zu einem Passband addieren und dass die Nebenresonanzen (N1 -N6) (TF1-TF2) eines aus je zwei DMS Spuren gebildeten Teilfilters phasengleich bei gleicher Frequenz mit den Hauptresonanzen des anderen Teilfilters zusammenfallen.
(EN)
In order to filter two channels of the same frequency band that lie close to each other, a SAW filter that has two passbands (PB1, PB2) and that can be obtained by appropriately connecting four DMS tracks (DMS1-DMS4) is used. The design parameters of the individual DMS tracks are set in such a way that the two main resonances (H1-H6) of each two DMS tracks are added together to form a passband and that the secondary resonances (N1-N6) (TF1-TF2) of a partial filter formed in each case from two DMS tracks coincide, in-phase and at the same frequency, with the main resonances of the other partial filter.
(FR)
Pour le filtrage de deux canaux, voisins l'un de l'autre, de même bande de fréquence, on utilise, conformément à l'invention, un filtre SAW à deux bandes passantes (PB1, PB2) qui peut être obtenu par câblage correspondant de quatre pistes DMS (DMS1-DMS4). Les paramètres de conception des pistes DMS individuelles sont réglés de telle façon que les deux résonances principales (H1-H6) de deux pistes DMS s'additionnent pour former une bande passante, et que les résonances secondaires (N1-N6) (TF1-TF2) d'un filtre partiel formé dans chaque cas à partir de deux pistes DMS, coïncident en phase et à la même fréquence, avec les résonances principales de l'autre filtre partiel.
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