Inductance Adjustment Block for High-Frequency Ridge Coupler
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Solution Overview
Problem
Conventional high frequency connection structures using ridge couplers experience characteristic degradation when handling signals outside the operating band due to ground inductance, which affects the performance of high frequency circuits.
Innovation Solution
A high frequency connection structure that includes a waveguide with a ridge structure, an inductance adjustment structure between the ridge structure and the transmission line, and a wire connecting the ridge structure to the transmission line, allowing for adjustment of ground inductance and reducing its impact on the circuit characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a ridge coupler is used to connect waveguide and transmission line, then connection loss is reduced, but ground inductance causes characteristic degradation when handling signals outside the operating band
Solution Approach 1:
The patent extracts the harmful ground inductance from the connection structure by introducing a grounding structure that provides an alternative low-inductance path to ground, thereby removing the detrimental effect of ground inductance on signals outside the operating band while preserving the low connection loss benefit of the ridge coupler
Solution Approach 2:
The patent introduces a grounding structure as an intermediary element between the ridge coupler and the transmission line. This grounding structure acts as a mediator that provides a controlled impedance path to ground, eliminating the harmful effects of ground inductance while maintaining the effective coupling between waveguide and transmission line
2Device complexity
If ground inductance is present in the ridge coupler connection, then circuit simplicity is maintained, but characteristic degradation occurs when handling signals outside the operating band
Solution Approach 1:
The grounding structure serves multiple functions simultaneously: it provides a low-inductance ground path for signals outside the operating band, maintains proper impedance matching within the operating band, and preserves the simplicity of the ridge coupler connection. This multi-functionality allows the structure to handle both in-band and out-of-band signals effectively without requiring complex additional components
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed structure effectively suppresses characteristic degradation of high frequency circuits by adjusting ground inductance, enabling reliable operation even when signals are outside the operating band of the ridge coupler, thus maintaining circuit performance.
Implementation Method 1
an inductance adjustment structure which is provided between the ridge structure and the transmission line and which adjusts ground inductance that is created due to a connection between the ridge structure and the waveguide
Implementation Method 2
A mode of electromagnetic waves that propagate through the waveguide is gradually converted by such a metal block into a propagation mode of electromagnetic waves that propagate over a high frequency circuit
Data Source
AI summary
A high frequency connection structure includes: a waveguide; a ridge coupler constituted by a conductor formed inside one end of the waveguide; a transmission line adjacent to the one end of the waveguide; an inductance adjustment structure which is provided between the ridge coupler and the transmission line and which adjusts ground inductance that is created due to a connection between the ridge coupler and the waveguide; and a wire which connects one end of the ridge coupler on a side of the transmission line and one end of the transmission line with each other.