Dual-feed antenna with cross-connected grooves for compact dual-band operation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional dual-band antennas require additional switching circuits, increasing costs and reducing performance, and their large size limits their use in compact wireless communication devices.
Innovation Solution
A dual-feed antenna design with a substrate featuring two antenna units and a microstrip transmission line, eliminating the need for external switching circuits and utilizing a small metal plate for grounding, allowing simultaneous operation in low and high frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-feed dual-band antenna structure is used, then the antenna can operate in dual frequency bands, but additional switching circuits or duplex circuits are required which increase product costs and reduce antenna performance
Solution Approach 1:
The antenna is divided into two independent antenna units, each with its own feed point and grounding unit. The first antenna unit handles one frequency band while the second antenna unit handles the other frequency band, allowing simultaneous dual-band operation without requiring switching circuits or duplex circuits.
Solution Approach 2:
The patent utilizes the substrate thickness dimension by forming grounding units on opposite surfaces of the substrate. The first grounding unit is on the first surface while the second grounding unit is on the second surface, allowing compact integration of dual-band functionality without increasing planar footprint.
2Device complexity
If prior art dual-feed dual-band antenna structures are used, then additional circuits are eliminated, but a large grounding area is required which increases manufacturing outlay and complexity
Solution Approach 1:
The patent utilizes the substrate thickness dimension by forming grounding units on opposite surfaces of the substrate. The first grounding unit is on the first surface while the second grounding unit is on the second surface, allowing compact integration of dual-band functionality without increasing planar footprint.
Solution Approach 2:
The two antenna units are integrated within a single substrate structure, with each unit consisting of a radiating unit and a grounding unit. The compact design nests both complete antenna systems within a small form factor, eliminating the need for large grounding areas while maintaining dual-feed dual-band operation.
3Stability of the object's composition
If a large grounding area is used to support the antenna, then the antenna structure is stable, but the volume of the antenna becomes large preventing widespread use in wireless communication products
Solution Approach 1:
The patent utilizes the substrate thickness dimension by forming grounding units on opposite surfaces of the substrate. The first grounding unit is on the first surface while the second grounding unit is on the second surface, allowing compact integration of dual-band functionality without increasing planar footprint.
Solution Approach 2:
The antenna structure integrates multiple functional elements (radiating units, grounding units, and substrate) into a composite structure. The substrate serves as both the mechanical support and the integration platform for both antenna units, providing structural stability while maintaining compact volume.
Data Source
AI summary
The invention relates to a dual-feed antenna. The dual-feed antenna includes a substrate, a first antenna unit and a second antenna unit. The second antenna unit includes a second radiating unit and a second grounding unit. The second radiating unit includes a second radiator which has a first groove. The first groove has a first bottom and a pair of first arms. The second grounding unit includes a first sub-grounding-area and a second sub-grounding-area. The second sub-grounding-area has a second groove which includes a second bottom and a pair of second arms. The first sub-grounding-area is cross-wise connected with the second sub-grounding-area at the bottom of the groove, and the second arms symmetrically distribute to both sides of the first sub-grounding-area, and the first groove has an opening direction opposite to the opening direction of the second groove.