| 摘要 |
1,191,984. Comb-line filters. MARCONI CO. Ltd. 29 April, 1969 [29 May, 1968], No. 25779/68. Heading H1W. Attenuation peaks at either or both limits of the pass-band of a comb-line or interdigital filter are provided by appropriately tuned, shunt resonators coupled to the input, output or intermediate resonators of the filter. As shown, two such resonators 86, 87 are parallel-coupled to the output resonator 5 and one such resonator 85 is end-coupled to the input resonator 1. Resonators 1 and 5 provide impedance transformation in known fashion. |
