A waveguide t-type hybrid junction based on ferroelectric materials and its design method

Abstract

The invention discloses a ferroelectric material based waveguide T type mixed junction. The junction comprises a first input waveguide, a second input waveguide, and an output wave guide arranged vertical to the first and second input waveguides, phase shift of 180 degree exists between the first input waveguide and the second input waveguide, a path from the first input waveguide to the output waveguide and a path from the second input waveguide to the output waveguide are provided with ferroelectric rectangular substrate units respectively, and each ferroelectric rectangular substrate unit comprises multiple ferroelectric rectangular substrates that are arranged periodically along the wave input direction. According to the invention, the ferroelectric material is used in the waveguide T type junction, and the whole waveguide structure is simple and easy to process; the sizes of the ferroelectric interdigital substrates and the distance between the substrates in periodical arrangement are adjusted to realize phase shift of 180 degree; the DC offset voltage of the ferroelectric material is adjusted to realize flexible phase change of input waves; and thus, performance of a millimeter wave phased-array radar communication system is improved.

Description

technical field [0001] The invention relates to the field of microwave circuits, in particular to a ferroelectric material-based waveguide T-type hybrid junction used in a millimeter-wave frequency band wireless transceiver system. Background technique [0002] Traditional frequency bands cannot meet the needs of applications such as high-speed, broadband, and small-caliber terminals. There is an increasing need for satellite communication systems that work in higher frequency bands, have larger bandwidths and higher spectral efficiency. The traditional waveguide T-type power divider has the advantages of high operating frequency, wide frequency band, low insertion loss and easy processing, but the isolation between the two ports is only about 6dB, and the port phase cannot be changed at will. In the phased array radar transceiver system Use is very limited. [0003] Around 2005, foreign countries conducted some research on the phase change in the waveguide. For example, t...

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Problems solved by technology

The traditional waveguide T-type power divider has the advantages of high operating frequency, wide frequency band, low insertion loss and easy processing, but the isolation between the two ports is only about 6dB, and the port phase cannot be changed at will. In the phased array radar transceiver system very limited use

[0003] Around 2005, foreign countries conducted some research on the phase change in the waveguide. For example, the research team at the University of California, Los Angeles used double-negative materials in the waveguide and achieved some results, but the phase could not be flexibly adjusted according to the design requirements.

At present, domestic research in this area is still in its infancy, and no relevant research results have been reported.

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