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加拿大“Glenayre”公司推出的自动拨号通信系统,在基地站设备中,除控制终端外,还有若干台收、发信机,而每一台收发信机对应一个信道,信道数的多少,则决定了系统的容量。为了实现多信道同时工作,保持信道间具有一定的隔离度,并减少天线安装和维护费用,因此,采用多信道共用天线方案,即多台收、发信机通过发射机合路器(Transmitter Combiners)、接收机多路耦合器(Receivcr Multicouplers)、双工器(Duplexers)所组成的天馈系统,连接至天线。“Glenayre”公司推出的自动拨号通信系统中,主要选择了Sinclair及Telewave专业公司所生产的天馈系统产品,因此,本文以“Sinclair”150 MHz频道,四信道天馈系统产品为例介绍。当然,其它公司产品,若性能指标接近,接口关系相同,应该同样适用。
Canada “Glenayre ” company launched automatic dial-up communication system, in the base station equipment, in addition to controlling the terminal, there are a number of Taiwan, the transmitter, and each transceiver corresponds to a channel, the number of channels , Then determines the system capacity. In order to achieve multi-channel simultaneous work, to maintain a certain degree of isolation between the channels, and reduce the antenna installation and maintenance costs, therefore, the use of multi-channel antenna scheme that is more than one receiver and transmitter through the transmitter combiner (Transmitter Combiners ), Receiver multi-channel couplers (Receivcr Multicouplers), duplexers (Duplexers) composed of the antenna system, connected to the antenna. “Glenayre ” company launched the automatic dial-up communication system, the main choice of Sinclair and Telewave professional products produced by the antenna system, therefore, this article “Sinclair ” 150 MHz channel, four-channel antenna system products Example introduction. Of course, the other company’s products, if the performance indicators are close, the same interface, should also apply.