Wideband zero phase shifter provided with transmission line with negative refractive index

Abstract

The invention relates to a novel wideband zero phase shifter provided with a transmission line with a negative refractive index. The conventional phase shifter is narrow in working frequency band and complicated in structure. The novel wideband zero phase shifter comprises an operational amplifier U1, an operational amplifier U2, an operational amplifier U3, an inductor L1, an inductor L2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a microstrip transmission line TL1, a microstrip transmission line TL2 and an electrolytic capacitor C. The resistors R1 and R2, the amplifier U1 and the inductor L1 form an L1 series inductor; the resistors R5 and R6, the amplifier U3 and the inductor L2 form an L2 series inductor; and the resistors R3 and R4, the amplifier U2 and the capacitor C form a C parallel capacitor, and are connected with the microstrip transmission lines TL1 and TL2 in series to form the zero phase shifter. By the invention, low insertion loss and wide working frequency band can be achieved.

Description

technical field [0001] The invention belongs to the field of microwave radio frequency technology, and relates to a novel broadband zero-degree phase shifter based on a transmission line with a negative refractive index. Background technique [0002] Zero-degree phase shifter is one of the important devices in microwave and radio frequency. At present, zero-degree phase shifter is widely used in microwave and radio frequency equipment such as zero-order resonant antenna and cascaded power splitter, microwave mixing network and phased array antenna. Among them, there are good applications in the fields of satellite communication, microwave, and millimeter wave wireless communication. [0003] There are many forms of practical zero-degree phase shifters at present, some use traditional transmission lines of different lengths to obtain phase difference through each signal transmission arm, and some use low-pass or high-pass filters to form signal transmission arms. These p...

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Problems solved by technology

[0005] The purpose of the present invention is to facilitate the design of more compact and efficient microwave and millimeter-wave integrated circuits, to overcome the shortcomings of existing zero-degree phase shifters such as insufficient operating frequency band, large loss, complex structure, large size, and inconvenient manufacture, and provide A broadband, low insertion loss, compact size, convenient design, and low cost zero-degree phase shifter based on a transmission line with a negative refractive index

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