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Adjustable metamaterial phase shifter based on active device

A technology of active devices and metamaterials, applied in the direction of waveguide devices, electrical components, circuits, etc., can solve the problems that the working frequency cannot be adjusted, limit the application of metamaterial structures, etc., and achieve the effect of compact structure

Inactive Publication Date: 2018-09-11
DONGHUA UNIV
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Problems solved by technology

[0004] Due to the limitation of the dispersion and dissipation of the metamaterial itself, the metamaterial can only work in a narrow frequency range in actual experiments; in addition, the cells of the metamaterial are mostly fixed structures, and parameters such as operating frequency cannot be adjusted, which limits the performance of metamaterials. application of structure

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  • Adjustable metamaterial phase shifter based on active device
  • Adjustable metamaterial phase shifter based on active device
  • Adjustable metamaterial phase shifter based on active device

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Embodiment Construction

[0020] In order to make the present invention more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

[0021] The basis of the phased array system (applicable to radar, communication and other systems) is to be able to achieve phase shifting of microwave and millimeter wave signals, thereby realizing antenna beam scanning. The basic idea of ​​using the metamaterial unit to realize the phased array system is: firstly, according to the beam scanning requirements of the phased array antenna, assign the amplitude modulation and phase modulation parameters of the antenna radiation unit; then use the microstrip line embedded with the metamaterial configuration to optimize the Material voltage tuning parameters, so as to meet the requirements of the phased array antenna, the basic block diagram is as follows figure 1 as shown, figure 1 Among them, n represents the number of phased array radiation elements, k 0 Indicates the amplitude we...

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Abstract

The invention relates to an adjustable metamaterial phase shifter based on an active device. The adjustable metamaterial phase shifter comprises a metamaterial unit for realizing a negative refractiveindex, and a series capacitor and a parallel inductor on a metamaterial unit transmission line; the overall phase shift value is a combination of the metamaterial unit and a phase shift unit composedof a capacitive inductor. The invention is a compact microwave and millimeter wave band phase shifter realized by an active device. The phase shifter can realize negative phase shifting characteristics without going through the entire cycle, and can be applied to phased array radars and communication systems. Moreover, the phase shifter does not use the method that the conventional phase shiftersset different propagation paths to generate a phase shift through switches, and the structure is more compact.

Description

technical field [0001] The invention relates to an adjustable metamaterial phase shifter implemented based on active devices and applied in the microwave and millimeter wave fields. Background technique [0002] The signal phase shifter in the microwave and millimeter wave fields is a necessary component in the field of phased array radar and phased array communication. The common methods to achieve phase shifting through circuits include the use of hybrid integrated phase shifting circuits or monolithic integrated phase shifting chips. The phase shifter can be divided into two methods: digital and analog. The digital phase shifter realizes the transmission path of different electrical lengths through the switch, so as to realize different delay characteristics and generate different phase delays; the analog method generally first converts the signal It is divided into two orthogonal signals, each of which is subjected to a certain amplitude modulation, and finally the final...

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Application Information

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IPC IPC(8): H01P1/18H01P1/185
CPCH01P1/18H01P1/185
Inventor 崔恒荣刘旭阳刘钊朱芸桢刘涛赵敏
Owner DONGHUA UNIV
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