JPS6234809U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of an electronic scanning antenna showing one embodiment of this invention, Fig. 2 is an explanatory diagram showing an example of the effect of this invention, and Figs. 3 a, b, and c show the amount of phase shift according to this invention. Diagram for explaining the amount of bias, 4th
The figure is a configuration diagram showing a conventional electronic scanning antenna. In the figure, 1 is an antenna element, 2 is a digital phase shifter, 3 is a power feeding section, 4 is a command angle signal, 5 is a beam steering computer, 6 is a phase shift amount calculation section, 7 is a phase shift amount calculation section, and 8 is a Phase shifter control section, 9 CPU, 10 memory, 11 bias addition section,
12 is a bias amount selection section. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A plurality of antenna elements arranged in a row or a plane, a digital phase shifter connected to the antenna element, a power feeding section for distributing power to each of the digital phase shifters, and for scanning a beam. a phase shift amount calculation section that arithmetic calculates each phase shift amount of the digital phase shifter from the command angle signal of the digital phase shifter, and quantizes the calculation result of the phase shift amount calculation section using the phase shift amount of the minimum bit of the digital phase shifter. It has a phase shift amount calculation unit, a phase shifter control unit CPU and memory that sets each digital phase shifter to the phase shift amount quantized by the phase shift amount calculation unit, and the beam is adjusted based on the command angle signal. In an electronic scanning antenna equipped with a beam steering computer for scanning, a digital phase shifter only has one half of the direction in which the beam is scanned in a row or plane based on the phase shift amount calculated by the phase shift calculation section. , the bias adding section applies a larger phase shift bias to the digital phase shifter connected to the antenna element near the edge than to the digital phase shifter connected to the antenna element near the center. and the phase shift amount calculation section, and
Electronic scanning characterized in that a bias amount selection section is added that selects a bias amount of a phase shift amount and controls the bias addition section in order to suppress an error between a command angle and a directivity angle of an antenna beam to a predetermined size. antenna.