Patent ID: 8786493
Filing Date: 2014-07-22
Classification: H01Q

Abstract:
1. An antenna system, comprising a transceiver (TRX) array module, an antenna element array module, a feeding network module and a Butler matrix module, wherein the TRX array module comprises a plurality of active TRX submodules and is configured to generate transmission signals that have undergone digital beam forming which make a beam, output from the antenna element array module, have an adjustable tilt, wherein the number of the active TRX submodules is M×N, where M is the number of the active TRX submodules in the horizontal direction, N is the number of the active TRX submodules in the vertical direction, M and N are positive integers greater than or equal to 2; the antenna element array module comprises a plurality of antenna elements and is configured to transmit the transmission signals, wherein the number of the antenna elements is A×B, where A is the number of elements in the horizontal direction, B is the number of elements in the vertical direction, A≧M, B≧N, and A and B are positive integers greater than or equal to 2; the feeding network module is configured to form a vertical beam characteristic of the antenna element array module before the antenna element array module transmits the transmission signals; and the Butler matrix module is configured to form a horizontal beam characteristic of the antenna element array module before the antenna element array module transmits the transmission signals; wherein the TRX array module comprising the M×N active TRX submodules connects to the antenna element array module comprising the M×N antenna elements through the feeding network module and the Butler matrix module; and wherein a connection among the modules in the antenna system comprises that: the TRX array module is configured to send the transmission signals to an input port of the Butler matrix module; the Butler matrix module is configured to generate first signals through processing the transmission signals and to send the first signals to an input port of the feeding network module through an output port of the Butler matrix module; and the feeding network module is configured to generate second signals through processing the first signals and to send the second signals to the antenna element array module through an output port of the feeding network module; and wherein the Butler matrix module comprises a first input port, a second input port and a first output port to a fourth output port, and comprises a third 180 degrees power splitter and a fourth 180 degrees power splitter, wherein the first input port and the second input port of the Butler matrix module are respectively connected to a first input port of the third 180 degrees power splitter and a first input port of the fourth 180 degrees power splitter; a first output port and a second output port of the third 180 degrees power splitter are respectively connected to the first output port and the third output port of the Butler matrix module; a first output port and a second output port of the fourth 180 degrees power splitter are respectively connected to the second output port and the fourth output port of the Butler matrix module; and signals being input into the first input port of the Butler matrix module comprise a first transmission signal and a second transmission signal with 90 degrees phase shifting, and signals being input into the second input port of the Butler matrix module comprise the second transmission signal and the first transmission signal with 90 degrees phase shifting, and signals being output from the first output port to the fourth output port of the Butler matrix module are the first signals respectively corresponding to the input signals.