A Miniaturized Design Method for Low Frequency Microstrip Power Splitter and Coupling Bridge
A technology of microstrip power divider and design method, which is applied in the direction of waveguide devices, electrical components, connecting devices, etc., can solve the problems of limited reduction and large physical size of coupling bridges, and achieve the effect of reducing size and saving area
Active Publication Date: 2016-03-30
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology
Therefore, the physical size of these low-frequency microstrip power splitters and coupling bridges is relatively large
Reducing the size of its microstrip circuit can effectively realize the miniaturization of microwave stand-alone products. The traditional method is to reduce the physical size by winding the serpentine line, but the reduction is limited, and it is easy to generate parasitic coupling
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[0021] The present invention will be further introduced below in conjunction with the accompanying drawings.
[0022] Common microstrip power dividers and coupling bridges mainly include Wilkinson power dividers and branch line coupling bridges. These circuits have fixed-phase low-impedance or high-impedance microstrip lines. The size of the stop microstrip lines is long at low frequencies, and the replacement of these microstrip lines by the present invention can significantly reduce their size.
[0023] Such as figure 1 As shown, the miniaturization design method of a kind of low-frequency microstrip power splitter and coupling bridge of the present invention, comprises steps as follows:
[0024] (1) Extract the parameters of the high-resistance or low-resistance microstrip lines in the low-frequency microstrip power divider and the coupling bridge, and the parameters include characteristic impedance characteristic parameters and phase characteristic parameters; There are ...
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The invention discloses a miniaturization design method of a low-frequency micro-strip power divider and a coupling bridge. The method includes the following steps that parameters of high resistance or low resistance micro-strip lines in the low-frequency micro-strip power divider and the coupling bridge are extracted; the high resistance or low resistance micro-strip lines in the low-frequency micro-strip power divider and the coupling bridge are replaced by special micro-strip structures formed by interdigital capacitors, the high resistance micro-strip lines and port matching micro-strip lines; the extracted phase parameters are divided by phase characteristics of the special micro-strip structures, and then it is determined that which level of the special micro-strip structures are used; the determined one-level or multi-level special micro-strip structures are connected in a cascade mode and used for replacing the original high resistance or low resistance micro-strip lines, and then the novel miniaturized micro-strip power divider and the novel coupling bridge are obtained. The method is suitable for the miniaturization design of the low-frequency micro-strip power divider and the coupling bridge.
Description
technical field [0001] The invention relates to a miniaturized design method for a low-frequency microstrip power divider and a coupling bridge, belonging to the field of microwave design. Background technique [0002] Microstrip power splitters and coupling bridges based on various media are widely used in existing microwave products. These circuits have longer high-impedance or low-impedance microstrip lines at lower frequencies. For example, a 2.4GHz equal-section Wilkinson power splitter designed on a Rogers5880 dielectric substrate has two arms with a physical length of about 22.8mm, which is relatively long. Therefore, the physical size of these low-frequency microstrip power dividers and coupling bridges is relatively large. Reducing the size of its microstrip circuit can effectively realize the miniaturization of microwave stand-alone products. The traditional method is to reduce the physical size by winding the serpentine line, but the reduction is limited, and it...
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IPC IPC(8): H01P5/12
Inventor 李斌赵慧敏张波徐辉王毅
Owner XIAN INSTITUE OF SPACE RADIO TECH