Terahertz active phased-array antenna

Abstract

The invention discloses a terahertz active phased-array antenna, and aims to provide a terahertz active phased-array antenna capable of correcting dynamic errors in real time. A terahertz antenna array is connected with a wafer-level hybrid circuit and an active feed network in sequence; the active feed network is connected with a wave controller and an artificial neural network of an artificial intelligence library, and is also connected with an emission source through an N-time frequency multiplier, a mixer connected with a receiver terminal, and a local oscillation source connected with themixer through an M-time frequency multiplier; the active feed network acquires a transmitting signal of a terahertz frequency band; the signals are distributed to a terahertz array antenna through the wafer-level hybrid circuit to be subjected to beam forming and beam scanning; the active feed network sends terahertz receiving signals to the frequency mixer, local oscillator signals obtained by the local oscillator source through the M-time frequency multiplier enter the frequency mixer to be subjected to difference frequency mixing with the terahertz receiving signals, difference frequency signals changing along with frequency are obtained and sent to the user receiving terminal, and frequency spectrum type ellipsometry and imaging are completed.

Description

technical field [0001] The invention relates to a terahertz active phased array antenna in the field of electronic technology. Background technique [0002] The terahertz (THz) frequency band is defined as the electromagnetic wave band with a frequency of 0.1THz to 10THz and a wavelength of 0.03mm to 3mm, between microwave and millimeter wave and far infrared, and in the transitional frequency band from electronics to photonics. The characteristics of terahertz are mainly analyzed by electronic methods, while the optical characteristics of terahertz are mainly analyzed by photonic methods. Terahertz radiation has coherence due to its coherence mechanism, and its coherence detection can directly measure the amplitude and phase of the electric field, so the absorption coefficient and refractive index of the sample can be accurately extracted, which improves the accuracy of the measurement. Accuracy. The energy of terahertz radiation is only one tenth of the energy of X-ray p...

AI Technical Summary

Problems solved by technology

Therefore, for terahertz active phased array antennas, how to correct the amplitude / phase errors generated by hardware circuit design and manufacturing, so as to achieve the best performance of terahertz active phased array antennas, has not yet been determined. Program

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