Parallel Radiator Antenna Layout for Wideband Miniaturization
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Solution Overview
Problem
Conventional antennas face challenges in achieving both miniaturization and wide frequency band coverage, particularly in devices with multiple communication bands and limited space, such as mobile phones with increasing camera quantities and complex antenna designs.
Innovation Solution
The proposed antenna design features at least two radiators spaced apart in parallel, with a gap of less than or equal to 3 mm, and a phase difference between feed signals ranging from 180°−45° to 180°+45°, allowing for efficient excitation of multiple resonance modes and reducing the size in both length and width directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a serial structure antenna is used to achieve wide frequency band coverage, then the frequency band bandwidth is improved, but the antenna size in the length direction increases
Solution Approach 1:
The patent transitions from a serial arrangement (one-dimensional extension) to a parallel arrangement of radiators, utilizing the width dimension instead. Multiple radiators are positioned parallel to each other with small gaps, exciting multiple resonance modes simultaneously to achieve wide frequency band coverage without extending the antenna length.
Solution Approach 2:
The patent changes the spatial arrangement parameter from serial to parallel configuration, and controls the gap parameter between radiators to be small (less than or equal to 3 mm). This parameter change enables the excitation of multiple resonance modes in the same operating frequency band, achieving wide bandwidth while maintaining compact size.
2Length of moving object
If multiple radiators are arranged in parallel with small gap, then the antenna size is reduced, but it becomes difficult to excite multiple resonance modes for wide frequency band coverage
Solution Approach 1:
The antenna is segmented into multiple independent radiators (first radiator and second radiator) that are spaced apart in parallel. Each radiator can be independently fed and can resonate at different frequencies, allowing multiple resonance modes to be excited simultaneously while maintaining a compact overall structure with small gap between segments.
Solution Approach 2:
The parallel radiator structure serves multiple functions: it reduces antenna size while simultaneously enabling wide frequency band coverage through multiple resonance modes. The small gap between radiators creates coupling effects that enhance the multi-resonance capability, making the antenna structure universally applicable for compact wideband applications.
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 efficiency bandwidth while significantly reducing the antenna's size, facilitating better layout options in electronic devices and supporting multiple antennas without increasing length, thus addressing the miniaturization and frequency band coverage challenges.
Implementation Method 1
a plurality of modes of the antenna in a same operating frequency band can be excited to form wide frequency band bandwidth
Data Source
AI summary
In accordance with an embodiment, an antenna includes at least two radiators. The at least two radiators include a first radiator and a second radiator that are spaced apart in parallel, and a first end of the first radiator is disposed closer to a first end of the second radiator than a second end of the first radiator. Both the first radiator and the second radiator are connected to a feed point.