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: A radiation array group for a dual-beam antenna includes a first radiation array and a second radiation array. The first radiation array is configured to form a first beam. The second radiation array is configured to form a second beam. Either one of the first radiation array and the second radiation array includes at least two radiating element rows. Each radiating element row of the at least two radiating element rows includes two radiating elements. The at least two radiating element rows are not always aligned with each other.

Abstract: A hybrid network antenna includes a reflection plate, a low frequency antenna array, and a dual-beam antenna array. The reflection plate includes a flat member and bending members formed by bending the two ends of the flat member. The low frequency antenna array is arranged on the flat member. The dual-beam antenna array include beam antenna sub-arrays located on both sides of the low frequency antenna array. The beam antenna sub-array on each side of the low frequency array includes a plurality of first high frequency radiating element arrays disposed in intervals along the width direction of the reflection plate. The plurality of high frequency radiating element arrays of each beam antenna sub-array are arranged on the reflection plate in different planes or a common plane.

Abstract: A dual-beam feed network includes a first power dividing circuit, a second power dividing circuit, and a third power dividing circuit. The first power dividing circuit is configured to convert a beam signal of a first channel into a plurality of first signals, input one first signal into a third power dividing circuit, and respectively input each remaining first signal to a corresponding antenna radiation unit. The second power dividing circuit is configured to convert a beam signal of a second channel into a plurality of second signals, input one second signal into the third power dividing circuit, and respectively input each remaining second signal to a corresponding antenna radiation unit. The third power dividing circuit is configured to couple and input the received first signal and the received second signal to a shared antenna radiation unit.

Abstract: A display device and a driving method therefor and a manufacturing method thereof. The display device includes: a liquid crystal cell (1); a first polarizer (2) positioned at a light incident side of the liquid crystal cell (1); and a reflective polarization structure (3) positioned at one side of the liquid crystal cell (1) away from the first polarizer (2). The reflective polarization structure (3) is configured to absorb light having a polarization direction parallel to a transmission axis direction of the first polarizer (2), and to reflect light having a polarization direction perpendicular to the transmission axis direction of the first polarizer (2).

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: A hybrid network antenna includes a reflection plate, a low frequency antenna array, and a dual-beam antenna array. The reflection plate includes a flat member and bending members formed by bending the two ends of the flat member. The low frequency antenna array is arranged on the flat member. The dual-beam antenna array include beam antenna sub-arrays located on both sides of the low frequency antenna array. The beam antenna sub-array on each side of the low frequency array includes a plurality of first high frequency radiating element arrays disposed in intervals along the width direction of the reflection plate. The plurality of high frequency radiating element arrays of each beam antenna sub-array are arranged on the reflection plate in different planes or a common plane.

Abstract: The present disclosure relates to a display panel, a color film substrate, and a manufacturing method thereof, and relates to the field of display technology. The color film substrate includes a substrate, a light-shielding layer, a filter layer, a transparent flat layer, and a spacer layer. The filter layer covers first areas of the light-shielding layer. The transparent flat layer has a flat area and a recessed area, where the flat area covers the filter layer and the recessed area covers second area of the light-shielding layer. The spacer layer includes a first spacer in the flat area and a second spacer in the recessed area, and a thickness of the first spacer and a thickness of the second spacer are the same.

Abstract: A vehicle body structure and a rail train with the vehicle body. The vehicle body structure includes a vehicle body, an air duct and a maintenance portion, wherein the air duct is provided at the bottom of the vehicle body, the air duct has a maintenance port, the maintenance portion is connected to the air duct and located at the maintenance port, and the maintenance portion has an opening position for opening the maintenance port and a closing position for closing the maintenance port. By operating a maintenance portion on an air duct at the bottom of a vehicle body, a maintenance port of the air duct is at an opened or closing position, in order to detect or repair the interior of the air duct, thus prolonging the life of the air duct of the vehicle body structure and improving the reliability.