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Titolo:
AN ALTERNATIVE METHOD FOR SUPPRESSING UNDESIRED TRANSVERSE-MODES IN LONGITUDINALLY COUPLED SAW RESONATOR FILTERS
Autore:
MARTIN G; WALL B; WEIHNACHT M;
Indirizzi:
INST FESTKORPER & WERKSTOFFORSCH DRESDEN EV D-01171 DRESDEN GERMANY
Titolo Testata:
IEEE transactions on ultrasonics, ferroelectrics, and frequency control
fascicolo: 6, volume: 42, anno: 1995,
pagine: 1099 - 1101
SICI:
0885-3010(1995)42:6<1099:AAMFSU>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Letter
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
12
Recensione:
Indirizzi per estratti:
Citazione:
G. Martin et al., "AN ALTERNATIVE METHOD FOR SUPPRESSING UNDESIRED TRANSVERSE-MODES IN LONGITUDINALLY COUPLED SAW RESONATOR FILTERS", IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 42(6), 1995, pp. 1099-1101

Abstract

As known, perturbing transverse modes arising from the waveguide properties of the interdigital transducers and reflectors can appear in SAW resonator filters. Usually, these undesired modes are suppressed by transducer apodization. This method has the disadvantage of increasingthe transducer impedance, We propose a longitudinally coupled resonator filter, the basic elements of which are able to guide the two slowest waveguide modes alone, but to excite and receive the first mode only, The basic elements are arranged side by side forming the complete filter permitting coupling with each other weak enough to fulfill the filter specification. The suppression of undesired modes by the construction is demonstrated by transmission measurements.

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Documento generato il 01/12/20 alle ore 10:28:57