An apparatus for multiplexing a plurality of antenna elements, the apparatus comprising more than one path, wherein each path comprises an antenna element, a filter and a duplexer, and the antenna element is one of a plurality of the antenna elements which are included in an antenna, wherein in the each path: the antenna element is connected to the filter and the duplexer, and a suppression band of the filter comprises a bandpass band of the duplexer; the antenna element is configured to receive signals to be sent to the filter or duplexer, and/or transmit signals sent from the filter or duplexer; the filter is configured to filter the signals sent by the antenna element and the duplexer and/or the signals to be sent to the antenna element and the duplexer to make signals of a first band pass through; the duplexer is configured to filter the signals sent by the antenna element and the filter and/or the signals to be sent to the antenna element and the filter to make signals of a second band pass through; and the first band is located on a non-suppression band of the filter, and the second band is located on the bandpass band of the duplexer; and wherein the apparatus further comprises in each path a combiner, wherein: one end of the combiner is connected to filters in the more than one path; and the combiner is configured to: receive signals sent by the filters in the more than one path, combine the received signals and send the combined signals to a receiving and transmitting channel connectable to the combiner; and/or receive the signals to be sent to the filters in the more than one path from the receiving and transmitting channel, split the received signals, and send the signals to the filters in the more than one path; wherein the apparatus further comprises: a receiving channel and a power amplifier, wherein: the receiving channel is connected to the duplexer and is configured to receive signals sent by the duplexer, and the power amplifier is connected to the duplexer and is configured to perform power amplification on the signals to be sent to the duplexer. the antenna element is connected to the filter and the duplexer, and a suppression band of the filter comprises a bandpass band of the duplexer; the antenna element is configured to receive signals to be sent to the filter or duplexer, and/or transmit signals sent from the filter or duplexer; the filter is configured to filter the signals sent by the antenna element and the duplexer and/or the signals to be sent to the antenna element and the duplexer to make signals of a first band pass through; the duplexer is configured to filter the signals sent by the antenna element and the filter and/or the signals to be sent to the antenna element and the filter to make signals of a second band pass through; and the first band is located on a non-suppression band of the filter, and the second band is located on the bandpass band of the duplexer; and wherein the apparatus further comprises in each path a combiner, wherein: one end of the combiner is connected to filters in the more than one path; and the combiner is configured to: receive signals sent by the filters in the more than one path, combine the received signals and send the combined signals to a receiving and transmitting channel connectable to the combiner; and/or receive the signals to be sent to the filters in the more than one path from the receiving and transmitting channel, split the received signals, and send the signals to the filters in the more than one path; wherein the apparatus further comprises: one end of the combiner is connected to filters in the more than one path; and the combiner is configured to: receive signals sent by the filters in the more than one path, combine the received signals and send the combined signals to a receiving and transmitting channel connectable to the combiner; and/or receive the signals to be sent to the filters in the more than one path from the receiving and transmitting channel, split the received signals, and send the signals to the filters in the more than one path; wherein the apparatus further comprises: a receiving channel and a power amplifier, wherein: the receiving channel is connected to the duplexer and is configured to receive signals sent by the duplexer, and the power amplifier is connected to the duplexer and is configured to perform power amplification on the signals to be sent to the duplexer.