Rotating Lens Barrel Antenna for Camera Interference Reduction
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Solution Overview
Problem
Digital cameras face challenges in maximizing antenna performance and maintaining a slim, aesthetic design due to space constraints and interference from metal components, which limits the efficiency of high-frequency band reception and radiation gain.
Innovation Solution
A camera design with a rotatable lens barrel that accommodates antennas, allowing for adjustable resonance frequencies by connecting and disconnecting radiators to implement different frequency bands, thereby optimizing antenna placement and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the antenna is arranged at the lower end of the camera, then the camera structure is simplified, but the frequency bandwidth becomes narrow and radiation gain efficiency is not high
Solution Approach 1:
The patent transitions the antenna arrangement from a two-dimensional planar layout on the camera body to a three-dimensional configuration within the lens barrel. By placing the antenna inside the lens barrel and utilizing the extension/retraction movement of the lens, the patent creates additional spatial dimensions for antenna deployment, enabling better radiation patterns and frequency characteristics while maintaining a compact camera body structure.
2Volume of moving object
If the size of the camera is reduced, then the miniaturization requirement is met, but the antenna length is restricted and cannot be optimized for high frequency band reception
Solution Approach 1:
The patent employs a dynamic antenna structure that changes its effective length and configuration based on the lens barrel extension state. When the lens barrel is extended, the antenna can achieve a longer effective radiating length for optimized high-frequency reception. When the lens barrel is retracted, the antenna folds or reconfigures to maintain a compact form factor, thus dynamically adapting to different operational requirements.
3Adaptability or versatility
If multiple antennas are dispersed and arranged on several regions in the camera, then different frequency bands can be received, but the efficiency of the internal layout is deteriorated and miniaturization is disturbed
Solution Approach 1:
The patent implements a multi-functional antenna system where a single antenna structure within the lens barrel can operate across multiple frequency bands by adjusting its configuration, length, or resonant characteristics. The lens barrel extension mechanism itself serves dual purposes: optical zoom and antenna deployment. This universal approach eliminates the need for multiple separate antennas, simplifying the internal layout while maintaining broad frequency band coverage.
4Strength
If metal components are used in the camera body, then structural strength is improved, but interference with antenna performance occurs
Solution Approach 1:
The patent extracts the antenna from the main camera body structure and relocates it to the lens barrel, which is a separate movable component. This physical separation isolates the antenna from metal components and electromagnetic interference sources in the camera body. The lens barrel acts as an independent antenna housing that can be extended away from the camera body during operation, further reducing interference while maintaining the structural integrity of the main camera body with metal 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
This design enhances radiation gain efficiency, prevents performance deterioration from surrounding influences, and maintains a miniaturized, simple, and aesthetically pleasing camera form factor by allowing easy adjustment of resonance frequencies and efficient antenna arrangement.
Implementation Method 1
a first radiator provided in a predetermined position of a lens barrel of the camera and having a length and a width for receiving a signal from a first wireless communication system
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
An antenna for a camera, comprising a camera having a communication module provided therein, a first radiator provided in a predetermined position of a lens barrel of the camera and having a length and a width for receiving a signal from a first wireless communication system, a power feeding line configured to feed a power from the communication module of the camera to the first radiator, and a ground line configured to ground the first radiator.