Antenna Radio Wave Absorbing Part for Capacitive Coupling
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Solution Overview
Problem
Capacitive coupling between antenna elements and transmission lines leads to signal attenuation and deteriorated antenna reception characteristics when antenna elements are arranged close to electrical signal transmission lines, such as audio and power sources.
Innovation Solution
Incorporating a radio wave absorbing and attenuating part with magnetic material characteristics between the antenna element and transmission lines to absorb and attenuate radio waves, thereby suppressing capacitive coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna element is arranged close to transmission lines to reduce device size and improve integration, then device compactness is improved, but capacitive coupling occurs causing signal attenuation and deteriorated antenna reception characteristics
Solution Approach 1:
A radio wave absorbing member is introduced as an intermediary component between the antenna element and the transmission lines. This member absorbs radio waves and prevents capacitive coupling while allowing the antenna element to maintain close proximity to transmission lines for compact device design. The absorbing member acts as a mediator that enables both compact integration and reliable antenna reception.
Solution Approach 2:
The radio wave absorbing member is strategically positioned only in the specific region where capacitive coupling occurs between the antenna element and transmission lines. This localized approach addresses the coupling problem at the critical interface without requiring global redesign of the entire device structure, enabling compact design while maintaining reception characteristics.
2Device complexity
If transmission lines are arranged adjacently to save space, then device integration is improved, but capacitive coupling causes signal attenuation and harmful electromagnetic interference
Solution Approach 1:
The radio wave absorbing member serves as a mediator placed between adjacently arranged transmission lines and the antenna element. It absorbs electromagnetic energy and prevents harmful capacitive coupling while allowing the transmission lines to remain closely integrated. This resolves the conflict between high integration and elimination of harmful electromagnetic interference.
Solution Approach 2:
The radio wave absorbing member converts the harmful electromagnetic energy and capacitive coupling effects into absorbed energy that does not interfere with signal transmission. By placing the absorbing member in the coupling region, the harmful electromagnetic fields are transformed into absorbed energy, eliminating interference while maintaining compact adjacent arrangement of transmission lines.
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
This configuration effectively prevents capacitive coupling, maintaining satisfactory antenna reception characteristics by isolating the antenna element from adjacent transmission lines.
Implementation Method 1
a radio wave absorbing and attenuating part having characteristics to absorb and attenuate a radio wave of a frequency band received by the antenna element
Data Source
Figure 1A~1B
Figure 2
Figure 3A~3B
AI summary
There is provided an antenna including an antenna element that has a prescribed length and detects a line of electric force, a transmission line that transmits an electrical signal, and a radio wave absorbing and attenuating part that has characteristics to absorb and attenuate a radio wave of a frequency band received by the antenna element and is arranged at least between the antenna element and the transmission line.