Preparation method of broadband phase adjustable phase shifter based on variable dielectric constant substrate

A dielectric constant and phase shifter technology, applied in circuits, electrical components, waveguide-type devices, etc., can solve the problems of narrow operating bandwidth, small size, low loss, etc., and achieve wide operating bandwidth, low return loss, and cost. reduced effect

Active Publication Date: 2020-07-14
江苏骏成电子科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These designs are faced with a narrow working bandwidth, and cannot use liquid crystals with large dielectric constant changes as substrates. If the dielectric constant changes greatly, the phase shift angle of the same length microstrip line will be large, but the working bandwidth will become smaller, so their Design, in order to achieve the required degree of phase shift, the size is relatively large, which is not conducive to the final antenna array. At the same time, the large size of the phase shifter will bring high insertion loss
These designs cannot meet the requirements of phased antenna arrays with wide frequency band, small size and low loss in the new generation communication system

Method used

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  • Preparation method of broadband phase adjustable phase shifter based on variable dielectric constant substrate
  • Preparation method of broadband phase adjustable phase shifter based on variable dielectric constant substrate
  • Preparation method of broadband phase adjustable phase shifter based on variable dielectric constant substrate

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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, the phase shifter is composed of several suspended strip lines with different widths, the central part is liquid crystal, the dielectric constant can vary from 3.6 to 9.1, and the liquid crystal phase shifter is only 9 mm. S11 (return loss), S21 (insertion loss) and the phase shift angle of the phaser are as follows figure 2 , image 3 and Figure 4 As shown, the phase shifter has a phase shift angle of 166 degrees.

Embodiment 2

[0034] Such as Figure 5 As shown, in the main transmission direction, it is composed of 5 sections of suspended strip lines with different widths (only the length of the first, second, fourth, and fifth sections is very small), and two stub line structures are added at the same time. These stub lines of different widths also serve to increase the bandwidth and adjust the operating frequency. The ranges of S11, S21, and phase shift angles are as follows: Figure 6 , Figure 7 and Figure 8 As shown, the liquid crystal dielectric constant changes from 3.6 to 9.1, its S11, and the working bandwidth is from 8.11GHz to 30GHz, or even higher. The amplitude of S21, the insertion loss is very small, the maximum is only 0.47dB. Phase shift angle range up to 190 degrees.

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Abstract

The invention provides a preparation method of a broadband phase adjustable phase shifter based on a variable dielectric constant base material. The method comprises the steps: solving the optimal solution of the width and the length of a microwave transmission line when the input impedance is close to 50 ohms through the least square method; carrying out optimization simulation according to the obtained length and width, and finally forming a liquid crystal box. The radio frequency phase shifter which is low in cost, wide in working bandwidth and stepless in stepping is prepared by utilizingthe characteristic that the dielectric constant of the liquid crystal is variable, and the radio frequency phase shifter can be applied to phased antenna arrays and other designs needing radio frequency phase shifters.

Description

technical field [0001] The invention relates to the field of radio frequency phase shifters, in particular to a preparation method of a broadband phase adjustable phase shifter based on a variable dielectric constant substrate. Background technique [0002] At present, 5G communication, satellite communication, and future 6G communication all require phased antenna arrays, the key of which is to realize the electronically adjustable electromagnetic beam scanning function. The realization of the electronically adjustable beam scanning function is to assign different electromagnetic wave signal phases to each radiation unit. Therefore, the phase adjustable phase shifter applied to the phased antenna array is the key technology and design of the phased antenna array. [0003] At present, the adjustable phase shifters on the market are generally composed of PIN tubes, varactor diodes, and ferrite devices. These phase shifters generally face the disadvantages of high cost, high i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P11/00
CPCH01P11/00
Inventor 苏治国
Owner 江苏骏成电子科技股份有限公司
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