Multi-Antenna Reflector Layout With Coupling Capacitor Leakage Suppression
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Solution Overview
Problem
Antenna devices with multiple antennas suffer from signal leakage through the space between adjacent antennas, leading to a degraded front-to-back ratio and compromised radiation performance.
Innovation Solution
Incorporating a coupling capacitor between the first and second antennas to suppress signal leakage by creating a capacitive coupling that reduces the influence of the spacing between the antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are provided separately to improve performance and enable flexible configuration, then antenna performance and configurability are improved, but signal leakage through the space between adjacent antennas occurs, degrading the front-to-back ratio
Solution Approach 1:
A coupling capacitor is introduced as an intermediary component between adjacent antennas. The capacitor couples the antenna elements electrically, creating a capacitive coupling effect that suppresses signal leakage through the spacing between antennas while maintaining the separate physical arrangement for flexible configuration
Solution Approach 2:
The electrical parameters between antenna elements are modified by introducing the coupling capacitor. This changes the impedance and coupling characteristics between adjacent antennas, transforming the harmful signal leakage into a controlled capacitive coupling relationship that improves the front-to-back ratio
2Reliability
If multiple antennas are provided separately to improve performance, then radiation performance is improved, but the front-to-back ratio is degraded due to signal leakage through spacing
Solution Approach 1:
The coupling capacitor serves as a mediator that maintains the beneficial separate antenna arrangement for improved radiation performance while simultaneously suppressing the harmful signal leakage through the spacing between antennas
Solution Approach 2:
The spacing between antennas, which originally causes signal leakage and degrades the front-to-back ratio, is transformed into a beneficial capacitive coupling structure. The coupling capacitor converts the harmful electromagnetic coupling through air into a controlled capacitive relationship that suppresses backward radiation
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 coupling capacitor effectively maintains a high front-to-back ratio for the antenna device, enhancing its radiation performance by minimizing signal leakage.
Implementation Method 1
a coupling capacitor being provided at a spacing between the first antenna and the second antenna
Data Source
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AI summary
The present disclosure relates to an antenna device comprising: a first antenna comprising a first reflecting member configured to reflect at least a portion of a signal radiated by the antenna device; a second antenna comprising a second reflecting member configured to reflect at least a portion of the signal radiated by the antenna device, there is a spacing between the first reflecting member and the second reflecting member; and a coupling capacitor comprising a first polar plate and a second polar plate, the first polar plate is disposed on a side, close to the spacing, of a first reflecting surface of the first reflecting member, and the second polar plate is disposed on a side, close to the spacing, of a second reflecting surface of the second reflecting member.