PATENT CLAIM ANALYSIS

Application Number: 15763008
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-03
Patent Classification: ["333", "194000"]

Abstract:
The aim according to the invention is to suppress a disturbing SH mode in a ladder-type filter. This aim is achieved in that the resonance frequency of the series resonator responsible therefor is moved and, at the same time, the pole zero distance of the series resonator is reduced by parallel connection with a capacitor. The antiresonance of the series resonator and therefore also the passband thus remain unchanged.

Claim (Index 9):
Method for shifting a disturbing SH mode in a SAW filter constructed on a lithium niobate substrate and using Raleigh waves,\n a) in which in a first step the filter is designed using SAW resonators, b) wherein a series branch, which is connected between the filter input and output and in which series resonators (RS) are arranged, and n parallel branches, which are connected in parallel to the series branch and connected to a fixed potential and in each of which a parallel resonator is arranged, are provided, c) in which the first series resonator(s) which have disturbing SH modes in the range of the passband or passband edge are identified, d) in which a first capacitor configured as an interdigital structure is in each case provided and connected in parallel to these first series resonators so that its pole zero distance is reduced in comparison with the remaining series resonators, e) in which the finger period of these first series resonators is reduced until the anti-resonance once again settles in the range of the right-hand passband edge of the filter, f) in which the value of the capacitor reducing the pole zero distance is at least dimensioned high enough that, according to method step e), the frequency of the SH mode dependent on the resonance frequency of the resonator is shifted toward a frequency above the passband edge.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 90.0
- Lexical Diversity: 1.54167
- Patent Class: 333.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15762995', '15347452', '13880044', '10493662', '11500486']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8516211530958532
- 35 USC 102 Novelty (BERT): 0.5333663079155205
- Combined Prediction Score: 0.8197956685778199
- Mean Citation Score: 268.718974
- Max Citation Score: 354.70157
- Similarity Product: 257.63199183448967

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test