| 摘要 |
An adaptive antenna relates to satellite navigation equipment. The antenna comprises an antenna array, N-elements of which by means of low-noise amplifiers and vector-modulators are connected with an adder having output, which through a feedback channel by means of transducer is connected to a first intermediate frequency, an amplifier having automatic regulation of a gain by means a control device, a control element and an analog-to-digital converter, a transducer to a second frequency with an analog-to-digital converter. Outputs of low-noise amplifies through a switching device linked with the control device are connected through direct channel: the transducer is connected to the first intermediate frequency, the amplifier having automatic regulation of a gain by means the control device, the control element and the analog-to-digital converter, the transducer to the second intermediate frequency with the analog-to-digital converter. Moreover,it is added a meter for angle of noise arrival, to which a signal from output of the analog-to-digital converter of direct channel is delivered, a corrector for angle of noise arrival, to a first input of the last one a signal from the meter is delivered, to a second input – from the analog-to-digital converter of feedback channel, a calculating machine for weight coefficients connected with the correcting device, a navigation receiver and with the control device, from which a priori information about additional direction of noise muting is delivered, the calculating machine signals being connected with control outputs of vector-modulators though digital-to-analog converters. The technical result is enhancement of adaptive antenna performance due to noise muting in certain and a priori set directions of signal reception, and also due to determination and giving out of noise arrival angles to external users. |
