Radial Line Power Combiner Impedance Matching
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Solution Overview
Problem
Existing power combiners/dividers face challenges in designing and manufacturing, particularly when dealing with large frequency band widths and high numbers of combining/dividing, due to difficulties in impedance matching and small conductor distances, making it hard to achieve required performance and frequency band width.
Innovation Solution
A power combiner/divider design that includes a body with a radial line and coaxial connectors, with impedance conversion parts provided in multiple stages to the radial line and coaxial lines, allowing for adjustable impedance matching and larger conductor distances, facilitating easier manufacturing and performance realization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If impedance matching is achieved using conventional radial line design, then power combining/dividing function is realized, but manufacturing precision becomes difficult when dealing with large frequency band widths and high numbers of combining/dividing
Solution Approach 1:
The radial line is divided into multiple sections with different characteristic impedances. Each section has a specific impedance value that progressively transforms the impedance from the center connector to the peripheral connectors, enabling precise impedance matching across large frequency bands and high combining/dividing numbers
Solution Approach 2:
Different sections of the radial line are assigned different characteristic impedances according to their specific position and function. The first section has impedance Z1, the second section has impedance Z2, and so on, with each section optimized for its local impedance transformation requirement
2Device complexity
If conventional radial line design is used without segmented impedance conversion, then device complexity is reduced, but manufacturing precision deteriorates due to small conductor distances
Solution Approach 1:
The radial line is segmented into multiple sections with different characteristic impedances. This segmentation allows each section to have optimized conductor dimensions, avoiding the extremely small conductor distances that would result from using a single uniform impedance design
Solution Approach 2:
The characteristic impedance parameter is changed across different sections of the radial line. By varying the impedance from Z1 to Z2 to Z3 etc., the conductor dimensions can be appropriately adjusted in each section, maintaining manufacturable conductor distances while achieving the required overall impedance transformation
Data Source
AI summary
A power combiner/divider W1 which includes: a body portion in which a cavity is formed; a center coaxial connector which is formed on an approximately center portion of the body portion; a plurality of peripheral coaxial connectors 14 which are arranged concentrically about the center coaxial connector 11 and are formed on the body portion; a radial line which is formed in the cavity formed in the body portion; a center coaxial line which has one end thereof connected to the center coaxial connector and the other end thereof connected to a center portion of the radial line; and a peripheral coaxial line which has one end thereof connected to the peripheral coaxial connector and the other end thereof connected to an outer peripheral portion of the radial line, an impedance conversion part is provided to the radial line in one or plural stages.