Compact Antenna Using Nested Metal Wire and Grounding Tube
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Solution Overview
Problem
Existing antennas for wireless communication devices face challenges in achieving a broad bandwidth while maintaining a compact size, which limits their integration into portable devices.
Innovation Solution
A compact antenna design utilizing a metal wire, insulation layer, metal weave, grounding metal tube, and protection layer, optimized to minimize size while maximizing radiating efficiency and pattern, using a conventional cable wire as the main radiator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna size is minimized for integration into portable devices, then the bandwidth and radiating efficiency deteriorate
Solution Approach 1:
The patent implements a nested structure where the metal wire is covered by insulation layer, which is then covered by metal weave, and finally by grounding metal tube. This multi-layer nesting allows the antenna to maintain a compact form factor while incorporating multiple functional elements that collectively provide broad bandwidth and efficient radiation without increasing overall size
Solution Approach 2:
The antenna is segmented into distinct functional layers: the metal wire for signal transmission, insulation layer for electrical isolation, metal weave for additional radiation and shielding, and grounding metal tube for reference potential. Each segment contributes specifically to bandwidth or efficiency, allowing the compact structure to achieve performance equivalent to larger conventional antennas
2Volume of moving object
If the antenna size is minimized for integration into portable devices, then the radiating efficiency deteriorates
Solution Approach 1:
The patent employs a composite structure combining different materials with complementary properties: conductive metal wire for primary radiation, dielectric insulation layer for field confinement, conductive metal weave for additional radiation pathways and shielding, and grounding metal tube for reference potential. This composite approach enables efficient radiation from multiple sources within a compact volume, overcoming the radiating efficiency limitations of small single-material antennas
3Ease of manufacture
If conventional cable wire is used as main radiator, then adapter blocks are needed which cause power loss
Solution Approach 1:
The patent extracts and eliminates the adapter block component from the conventional cable wire antenna structure. By designing the metal wire, metal weave, and grounding metal tube to directly interface with the feed line and ground plane, the structure achieves proper impedance matching and grounding without requiring separate adapter blocks, thereby eliminating the associated power losses while maintaining ease of manufacture
Data Source
AI summary
A compact antenna for transmitting or receiving a radio frequency signal includes a metal wire extending from a first location to a second location, an insulation layer extending from the first location to a third location, for covering a portion of the metal wire from the first location to the third location, a metal weave extending from the first location to a fourth location, for covering a portion of the insulation layer from the first location to the fourth location, and a grounding metal tube extending from a fifth location to the third location, for covering a portion of the metal weave from the fifth location to the fourth location, and covering a portion of the insulation layer from the fourth location to the third location.