Ridge Waveguide Antenna Matching for Miniaturized Arrays
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Solution Overview
Problem
The miniaturization of antenna apparatuses for communication satellites leads to impedance mismatch issues, affecting electrical performance such as voltage standing wave ratio (VSWR) and return loss.
Innovation Solution
The implementation of an impedance matching structure in conjunction with a ridge structure, easily manufactured using additive manufacturing methods, addresses the impedance mismatch problem, enabling miniaturization while maintaining optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the ridge structure is applied in the waveguide to achieve miniaturization, then the antenna apparatus size is reduced, but impedance mismatch occurs affecting VSWR and return loss
Solution Approach 1:
An impedance matching structure is introduced as an intermediary component between the ridge waveguide and the feed network. This matching structure, which may include tuning elements or transformation sections, mediates the impedance transition to eliminate reflections and improve VSWR while preserving the miniaturized configuration.
Solution Approach 2:
The impedance matching is achieved by adjusting geometric parameters of the waveguide structure, such as ridge dimensions, waveguide cross-section, or matching element positions. By optimizing these parameters, the characteristic impedance is transformed to match the feed network, resolving the impedance mismatch caused by miniaturization.
2Adaptability or versatility
If the distance between antenna arrays is reduced to less than half wavelength for beam steering, then beam steering capability is improved, but manufacturing complexity increases
Solution Approach 1:
The antenna array is divided into modular units with standardized impedance matching structures. Each array element can be independently manufactured and then assembled, reducing overall manufacturing complexity while maintaining the required sub-half-wavelength spacing for beam steering functionality.
Data Source
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AI summary
According to the present disclosure, an antenna apparatus which includes a hollow pillar shaped waveguide extending in a first direction and at least one ridge protruding from an inner circumferential surface of the waveguide and extending in the first direction, wherein the ridge has at least one recessed groove formed in the first direction; and an antenna apparatus which includes the waveguide, the ridge and the iris structure protruding from the inner circumferential surface of the waveguide along a plane intersecting the first direction, are provided.