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Aperiodic capacity loaded phase shifter

A capacitive loading, non-periodic technology, applied to circuits, electrical components, waveguide devices, etc., can solve the problems of increased overall reflection of the phase shifter, increased loss of the phase shifter, etc., to achieve low insertion loss, good impedance matching, Large effect of controllable phase shift

Inactive Publication Date: 2008-12-10
EAST CHINA NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is known from the theory of radio frequency or microwave circuits that the inhomogeneity introduced by each BST capacitor periodically loaded on the transmission line will introduce additional reflections, which will increase the overall reflection of the phase shifter, resulting in the phase shifter being connected to its input terminal. Increased loss due to mismatch with the microwave circuit on the output
From the point of view that the matching performance between the phase shifter and the microwave circuit connected to it needs to be improved, it is not the best technical solution to periodically load the transmission line section of the phase shifter with capacitance

Method used

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Embodiment 1

[0025] One of the phase shifters of embodiment 1 aperiodic capacitive loading, its structural schematic diagram is shown in figure 2 .

[0026] In this embodiment, sapphire is used as the substrate 20, and the microwave transmission line 40 is constructed on the substrate 20. The microwave transmission line 40 is a coplanar waveguide transmission line, and the microwave transmission line 40 includes a central signal line 7, a loading capacitor 2, a first grounding line 3, a second The ground wire 5, the input end 1 and the output end 4, the central signal line 7 is located between the first ground wire 3 and the second ground wire 5, and the two ends of the central signal line 7 are respectively the input end 1 and the output end 4, n The loading capacitors 2 with different capacitances are evenly arranged between the central signal line 7 and the grounding lines 3 and 5 of the microwave transmission line 40, and the loading capacitor 2 and the central signal line 7 are conne...

Embodiment 3

[0033] Embodiment 3 The second phase shifter of aperiodic capacitive loading, its structural schematic diagram is shown in image 3 .

[0034] In this embodiment, sapphire is used as the substrate 20, and the microwave transmission line 40 is constructed on the substrate 20. The microwave transmission line 40 is a coplanar waveguide transmission line, and the microwave transmission line 40 includes a central signal line 7, a loading capacitor 2, a first grounding line 3, a second The ground wire 5, the input end 1 and the output end 4, the central signal line 7 is located between the first ground wire 3 and the second ground wire 5, and the two ends of the central signal line 7 are respectively the input end 1 and the output end 4, n Loading capacitors 2 with the same capacitance are unevenly arranged between the central signal line 7 and the first grounding line 3 and the second grounding line 5. As far as the loading position is concerned, its capacitance is an optimized va...

Embodiment 5

[0041] Embodiment 5 The phase shifter with aperiodic capacitive loading is the third.

[0042] In this embodiment, sapphire is used as the substrate 20, and the microwave transmission line 40 is constructed on the substrate 20. The microwave transmission line 40 is a coplanar waveguide transmission line, and the microwave transmission line 40 includes a central signal line 7, a loading capacitor 2, a first grounding line 3, a second The ground wire 5, the input end 1 and the output end 4, the central signal line 7 is located between the first ground wire 3 and the second ground wire 5, and the two ends of the central signal line 7 are respectively the input end 1 and the output end 4, n The loading capacitors 2 with different capacitances are unevenly arranged between the central signal line 7 and the grounding lines 3, 5, and any one of the n loading capacitors 2 is relative to its loading position on the central signal line 7, Its capacitance is an optimized value, and the l...

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Abstract

Base on traditional periodic capacity loaded phase shifter, load capacities in aperiodic mode are loaded on microwave transmission line: load capacities with different capacitance quantity are arranged on central signal line of microwave transmission line uniformly; load capacities with identical capacitance quantity are arranged on central signal line of microwave transmission line unevenly, or load capacities with different capacitance quantity are arranged on central signal line of microwave transmission line unevenly. The said load capacity is BST voltage controlled capacity or MEMS voltage controlled capacity. Advantages of the disclosed shifter are: capacitance quantity of any capacitance in the shifter is in optimal value; the shifter is matched to input end and output end of microwave circuit well; it is small reflection, low insertion loss, and large controllable quantity of phase shift when microwave signal passes through the disclosed phase shifter.

Description

technical field [0001] The invention relates to a non-periodically capacitively loaded phase shifter, in particular to a non-periodically capacitively loaded transmission phase shifter suitable for phased array antenna arrays. Background technique [0002] The phase shifter is the core component of a large number of applications in phased array radar, satellite communication, mobile communication and other equipment. Its operating frequency band and insertion loss directly affect the anti-interference ability and sensitivity of these equipment, as well as the volume, weight and cost of the equipment. , so the study of broadband, low insertion loss phase shifter is of great significance in military and civilian communications, radar and other fields. MEMS phase shifters and BST phase shifters have the advantages of small size, light weight, short control time, low insertion loss, and large loadable power, and have great development and application prospects. MEMS is the Engl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P9/00H01Q3/30
Inventor 朱守正贺联星周颖娟张伟伟廖斌
Owner EAST CHINA NORMAL UNIV
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