| 摘要 |
<p>This disclosure depicts acoustic surface wave devices adapted for use in a television receiver which include one or more surface wave transducers of the interdigitated comb type comprising periodic arrays of electrically conductive fingers. The duty factor of the fingers of at least one transducer in each of the depicted devices is chosen according to prescribed guidelines to improve or control one or more device performance parameters related to the generation, reception and/or propagation of surface waves, such as wave reflection coefficient, surface wave coupling factor, surface wave velocity, or uniformity in wave reflection coefficient as a function of wave frequency. Novel methods for making such devices are also disclosed.</p> |
