ＤＲ１声表面波谐振器殷建中目前，在防盗报警、车库大门、轿车自动门领域，无线电遥控得到广泛应用。为了缩小体积，增强发射效率，一般选用３００ＭＨｚ以上的频率。在该频段内，主振级如采用石英晶体，只能多次倍频（因石英晶体一般只能做到７５ＭＨｚ左右），造成发射... DR1 SAW resonator Yin Jianzhong At present, in the burglar alarm, garage door, automatic car door field, radio remote control has been widely used. In order to reduce the volume and enhance the launch efficiency, the general use of more than 300MHz frequency. In the band, the main vibration level, such as the use of quartz crystal, can only multiple frequency (due to quartz crystal generally can only do around 75MHz), resulting in launch ...