Title :
New low-loss broadband SAW filter using unidirectional IDTs with U-shaped MSCs
Author :
Hikita, Masayuki ; Kojima, H. ; Tabuchi, T. ; Kinoshita, Yuta
Author_Institution :
Hitachi Ltd., Central Research Laboratory, Kokubunji, Japan
Abstract :
A new low-loss broadband SAW filter is presented. A new configuration using one pair of electrically connected IDTs with an optimum number of fingers, as well as unidirectional IDTs with U-shaped MSCs, is described. Experimental results with bandwidth as wide as 10% and loss as low as 3 dB are achieved. Very accurate computer-aided design of a low-loss filter with MSCs is obtained.
Keywords :
band-pass filters; crystal filters; surface acoustic wave devices; U-shaped MSCs; VHF; bandwidth 10%; computer-aided design; configuration; loss 3 dB; low-loss broadband SAW filter; multistrip couplers; optimum number of fingers; unidirectional IDTs;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840315
