Patent ID: 6172582
Filing Date: 2001-01-09
Classification: H03H

Abstract:
A method of making an acoustic wave device, said method comprising steps of:providing a substrate for supporting acoustic wave propagation;disposing a first transducer on said substrate, said first transducer for converting electrical energy to acoustic energy and vice versa; anddisposing a first reflector at a first acoustic port of said first transducer, wherein said first reflector includes a first number of reflection elements, wherein said first number includes a first number N.sub.g of reflection elements, said first number N.sub.g chosen in accordance with (2.pi./3)(2.pi..sup.2 +8k.sup.2 -2.pi.(.pi..sup.2+ 8k.sup.2).sup.-0.5 (k.sup.2 /3) .sup.2).sup.-0.5.ltoreq.N.sub.g.ltoreq.(4.pi./3) (2.pi..sup.2 +8k.sup.2 -2.pi.(.pi..sup.2 +8k.sup.2).sup.-0.5 (2k.sup.2 /3).sup.2).sup.-0.5, wherein k.sup.2 is an electromechanical coupling coefficient of said substrate.