Abstract: An antenna includes an antenna element array configured to form a dual beam and including at least three antenna elements and a feed network including a first signal input terminal configured to input a first beam signal for forming a first beam, a second signal input terminal configured to input a second beam signal for forming a second beam, a third signal input terminal configured to input a third beam signal for forming a third beam, and a diplexer including a first input terminal, a second input terminal, and an output terminal. The diplexer is electrically connected to at least one antenna element in the antenna element array through the output terminal and configured to process a signal associated with a dual-beam signal and a signal associated with the third beam signal working in a different frequency band from the dual-beam signal, to obtain a combined signal.

Abstract: A dual-beam antenna includes an element array and a feed network. The element array includes a first element set and a second element set. The first element set includes at least three first elements arranged in a row. The second element set includes at least three second elements arranged in a row. The at least three first elements of the first element set and the at least three second elements of the second element set are independent of each other. The feed network includes a first feed network and a second feed network. The first feed network includes a first cable set and a first power divider. The second feed network includes a second cable set and a second power divider.

Abstract: A feed network includes a first power divider, a delay line, a 90° electric bridge and a second power divider. The first power divider converts an input signal of the feed network into a first signal and a second signal, transmits the first signal to the delay line, and transmits the second signal to the 90° electric bridge directly. The delay line changes a phase of the first signal and transmits the first signal to the 90° electric bridge. The 90° electric bridge converts the received first signal and the received second signal into two signals having a same phase but different amplitudes, transmits one of the two signals to the second power divider, and outputs the other one of the two signals to a first radiator directly. The second power divider outputs the one of the two signals to a second radiator.

Abstract: The invention discloses an antenna feed structure and a base station antenna. The base station antenna comprises a plane reflector and at least one antenna feed structure installed thereat. The antenna feed structure comprises a radiator, an antenna feed balun and an antenna feed board. The antenna feed balun comprises one end connected to the radiator, and another end passing through the antenna feed board to connect the ground. In operation, an excitation signal is transferred from the antenna feed board via the antenna feed balun to the radiator. The present invention can be utilized to enhance the performance of antenna radiation, and improve an antenna cross polarization ratio, facilitating an increase in an antenna gain, increasing the base station coverage and optimizing the electrical characteristics of an antenna.