Amplitude phase error correction system and method for transmitting channel of phased-array antenna

A phased array antenna and transmission channel technology, applied in transmitter monitoring and other directions, can solve problems such as error correction, achieve good correction accuracy, and achieve simple engineering effects

Inactive Publication Date: 2015-04-08
CHONGQING UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a uniform circular array phased array antenna transmission channel amplitude and phase error correction system and method that can not only be realized by simple engineering but also can obtain higher correction accuracy, and solve the problem of uniform circular array phased array antenna transmission channel amplitude and phase error correction. error correction problem

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  • Amplitude phase error correction system and method for transmitting channel of phased-array antenna

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Embodiment Construction

[0028] A uniform circular array phased array antenna consisting of N array elements and their corresponding channels, N transmitting array elements are evenly arranged on a circle, and the center array element is an auxiliary receiving channel array element, such as figure 1 shown. The block diagram of the phased array antenna transmission structure is as follows: figure 2 As shown, the transmitter generates the transmission signal and radiates to free space from the array elements after passing through the D / A and RF front-end. Because the signal transmitted by the phased array antenna is a narrowband signal, within the entire signal bandwidth, the amplitude gain and phase error between channels can be approximated to not change with frequency. Therefore, it is not necessary to consider the signals of different frequencies separately when correcting, and they are all approximately considered to occur at the center frequency, so as long as an amplitude error factor A is intr...

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Abstract

The invention discloses an amplitude phase error correction system and an amplitude phase error correction method for a transmitting channel of a phased-array antenna. The amplitude phase error correction system comprises a correction signal source, a rotary selector switch, a to-be-corrected transmitting channel, an auxiliary receiving channel and a correction coefficient calculating module. When the amplitude phase error correction is carried out on an n transmitting channel, a correction signal source transmits a correction signal y (k), and the auxiliary receiving channel receives a signal yn (k) at the same time. A correction coefficient calculating module calculates a correction weight signal wn through the signal yn (k) and a reference signal yref (k) in such a way of adopting a minimum mean square self-adaptive filtering algorithm. According to the method and system provided by the invention, the methods engineering can be realized simply, and the correction accuracy is higher, therefore the system and the method can be applied to the field of the amplitude phase error correction of a uniform circular array phased-array antenna.

Description

technical field [0001] The invention relates to the field of phased array antenna correction, in particular to a phased array antenna transmitting channel amplitude and phase error correction system and method. Background technique [0002] The phased array antenna is an antenna array composed of many identical antenna elements and corresponding RF front-ends. Each channel contains a number of microwave components, such as radiating antenna units, phase shifters, electronically adjustable attenuators, power amplifiers, frequency converters, low-noise Amplifiers, filters, limiters, etc. Due to the inconsistency of the components in the production process of the phased array antenna, there are tolerances in the manufacture and assembly of the equipment, which makes the amplitude and phase of the corresponding channel of each array element of the antenna appear larger errors, that is, the channel amplitude and phase error. In addition, due to changes in the use environment, ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/12
Inventor 曾浩周建文杨清昆崔悦琪幸倩刘玲
Owner CHONGQING UNIV
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