Antenna system and access network device

An antenna system comprising:

• wherein the antenna system comprises a bridge network, wherein the bridge network comprises n bridge modules, a third port of a 1st bridge module in the n bridge modules is connected to a second port of an nth bridge module in the n bridge modules, a third port of an ith bridge module in the n bridge modules is connected to a second port of an (i−1)th bridge module in the n bridge modules;
• and
• an antenna module, wherein the antenna module comprises n antennas, wherein fourth ports of the n bridge modules are respectively connected to the n antennas, wherein i is an integer greater than or equal to 2 and less than or equal to n, and wherein n is an integer greater than or equal to 2;
• wherein the nth bridge module in the n bridge modules performs third weighting processing on a third analog signal input at a third port of the nth bridge module and a fourth analog signal input by an nth antenna in the n antennas to a fourth port of the nth bridge module, to obtain a third component and a fourth component, and the nth bridge module outputs the third component at a first port of the nth bridge module, and inputs, at the second port of the nth bridge module, the fourth component to the third port of the 1st bridge module, to use the fourth component as a third analog signal of the third port of the nth bridge module;
• and
• wherein a jth bridge module in the n bridge modules performs third weighting processing on a third analog signal input at a third port of the jth bridge module and a fourth analog signal input by a jth antenna to a fourth port of the jth bridge module, to obtain a third component and a fourth component, and the jth bridge module outputs the third component at a first port of the jth bridge module, and inputs, at a second port of the jth bridge module, the fourth component to a third port of a (j+1)th bridge module, to use the fourth component as a third analog signal of the third port of the (j+1)th bridge module, wherein j is an integer greater than or equal to 1 and less than n.

An access network device, wherein the access network device includes an antenna system comprising:

• a bridge network comprising n bridge modules wherein a third port of a 1st bridge module in the n bridge modules is connected to a second port of an nth bridge module in the n bridge modules, a third port of an ith bridge module in the n bridge modules is connected to a second port of an (i−1)th bridge module in the n bridge modules;
• and
• an antenna module comprising n antennas, wherein fourth ports of the n bridge modules are respectively connected to the n antennas, wherein i is an integer greater than or equal to 2 and less than or equal to n, and wherein n is an integer greater than or equal to 2;
• wherein the 1st bridge module in the n bridge modules performs first weighting processing on a first analog signal input at a first port of the 1st bridge module and a second analog signal input at a second port of the 1st bridge module, to obtain a first component and a second component, and the 1st bridge module outputs the first component at a fourth port of the 1st bridge module, and inputs, at the third port of the 1st bridge module, the second component to the second port of the nth bridge module in the n bridge modules, to use the second component as a second analog signal of the second port of the nth bridge module;
• and
• a kth bridge module in the n bridge modules performs first weighting processing on a first analog signal input at a first port of the kth bridge module and a second analog signal input at a second port of the kth bridge module, to obtain a first component and a second component, and the kth bridge module outputs the first component at a fourth port of the kth bridge module, and inputs, at a third port of the kth bridge module, the second component to a second port of a (k−1)th bridge module in the n bridge modules, to use the second component as a second analog signal of the second port of the (k−1)th bridge module, wherein k is an integer greater than 1 and less than or equal to n.