Title :
Micro-directional couplers for frequency selection
Author :
Haruvi-Busnach, E. ; Zilberstein, M. ; Croitoru, N. ; Seidman, A.
Author_Institution :
Dept. of Electr. Eng., Tel Aviv Univ., Israel
Abstract :
Big adaptors in SAW devices cause crosstalk. This problem was solved employing directional couplers (DC) made of miniaturized microinterdigital transducers and microacoustic waveguide (WG). They were made by deposition of Al-strips, using microlithographic technology. This enables to avoid dispersion, to increase efficiency, and to integrate several DCs on the same substrate. A coupling of DC of ~25 dB for the DC was obtained and, by depositing between the WGs, horizontal dashed microlines as perturbation, frequency displacement, between transmitting and receiving WGs was obtained
Keywords :
acoustic microwave devices; aluminium; directional couplers; interdigital transducers; lithography; surface acoustic wave couplers; 25 dB; Al; Al-strips; RF input circuits; SAW devices; coupling of DC; crosstalk; directional couplers; dispersion; efficiency; electronic warfare; frequency displacement; frequency selection; horizontal dashed microlines; micro-directional couplers; microacoustic waveguide; microlithographic technology; miniaturized microinterdigital transducers; perturbation; Acoustic transducers; Acoustic waveguides; Acoustic waves; Couplers; Frequency; Scattering; Strips; Surface acoustic wave devices; Surface acoustic waves; Transmitters;
Conference_Titel :
Frequency Control Symposium, 1994. 48th., Proceedings of the 1994 IEEE International
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-1945-1
DOI :
10.1109/FREQ.1994.398314
