Non-reciprocal phased-array antenna unit, antenna and control method

Abstract

The invention provides a non-reciprocal phased-array antenna unit, an antenna and a control method. The non-reciprocal phased-array antenna unit comprises a top layer and a bottom layer which are printed at two sides of a dielectric substrate respectively, wherein the top layer comprises a feed network and a resonance patch which is connected with the feed network into a whole; the feed network comprises a first feed point, a second feed point, a third feed point and a fourth feed point which are arranged at different positions of the feed network respectively, and the feed network is used forfeeding in radio frequency signals; the bottom layer comprises four modulation signal circuits, each modulation signal circuit comprises a coplanar waveguide, and the coplanar waveguides are used forfeeding in low-frequency modulation signals; each feed point of the feed network is communicated with one modulation signal circuit, and the low-frequency modulation signal fed by the coplanar waveguide of each modulation signal circuit is used for being loaded to the corresponding feeding point. According to the invention, non-reciprocity of polarization and a directional diagram can be realizedunder the condition of no magnetic material bias.

Description

technical field [0001] The invention relates to the field of phased array antennas, in particular to a non-reciprocal phased array antenna unit, an antenna and a control method. Background technique [0002] The phased array antenna can realize beam scanning by controlling the phase of the radio frequency signal supplied to each antenna element. Limited by time-reversal symmetry, the traditional phased array antenna has the same transmit pattern and receive pattern, and the polarization in the transmit state is the same as that in the receive state. [0003] People often rely on magnetic materials such as ferrite and external permanent magnets to realize the non-reciprocal transmission of electromagnetic waves, and design non-reciprocal devices such as isolators and circulators. However, magnetic materials are not compatible with integrated circuits, so it is difficult to realize the integration of devices. At the same time, the external permanent magnets make these devices...

AI Technical Summary

Problems solved by technology

However, magnetic materials are not compatible with integrated circuits, making it difficult to integrate devices. At the same time, the addition of permanent magnets makes these devices have the disadvantages of large volume and high loss.

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