11 microwave spike events were observed with the 2.6--3.8 GHz solar radiospectrometer of Beijing Astronomical Observatory. The spikes have shortdurations (tens of ms) and weak flux densities (< 500 sfu), similar to the previous reports. Their degrees of polarization span over a large range, some spikes have frequency drifts as high as several GHz/s. Time delays of 8 ms or more are found between the twopolarizationsof some spikes, and drastic variations in the degree of polarization withthe frequency, even reversal of the polarizations, are found.%利用北京天文台2.6--3.8 GHz频谱仪的观测资料,找到11个微波尖峰辐射事件.尖峰一般具有数十毫秒的寿命,数百个sfu的流量密度和数十至数百MHz的带宽,这与以前的报道类似. 尖峰的偏振度各式各样,有的尖峰还有数千MHz/s的频率漂移. 某些尖峰在二个偏振态之间有8毫秒的时间延迟(最大延迟可达16毫秒).另外,还发现了尖峰的偏振度随频率剧烈变化的偏振反转现象.
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