钹式水听器体积小，灵敏度高，但是接收的性能不够稳定，接收频带比较窄。

The cymbal hydrophone has small volume and high sensitivity, but its reception performance is not stable enough, with narrow receiving frequency band.

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单个天线的工作频带覆盖了例如由无线电系统所使用的频率范围或者只是该频率范围内的发射频带或接收频带。

The operating band of an individual antenna covers e. g. the frequency range used by a radio system or only the transmitting or receiving band in that range.

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MIMO系统在发送端和接收端利用多个天线同时在相同的频带内传输信号，使得信道容量得到很大的增加。

The MIMO systems use multiple antennas at both the transmitter and receiver to transmit signal in the same frequency band at the same time can significantly increase the channel capacity.

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