New high-performance and low-loss SAW filters used in ultra-wideband cellular radio systems
作者： M. Hikita , T. Tabuchi , N. Shibagaki , T. Akagi , Y. Ishida
DOI: 10.1109/ULTSYM.1991.234158
关键词: Frequency response 、 Transmitter 、 Electronic engineering 、 Electrical engineering 、 Band-pass filter 、 Amplifier 、 Insertion loss 、 Wideband 、 Prototype filter 、 Ultra-wideband 、 Radio receiver 、 Surface acoustic wave 、 Computer science
摘要: Several new technologies are reported for the design of high-performance and low-loss surface acoustic wave (SAW) filters used in ultra-wideband cellular radios. Among them, configurations wideband bandpass applicable as receiver have been developed. These allow 3- or 4-dB insertion loss sharp-cutoff frequency responses. New structures band-rejection transmitter final stage also Their use results low 1.4 dB well high-power characteristics. A SAW front-end module constructed with filters, a low-noise amplifier, single balanced mixer is described. >
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