Single Layer Planar Antenna Ground Plane Feed Line Configuration
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Solution Overview
Problem
Standard planar antennas fail to function correctly with single-layer printed circuits due to the feed line dividing the plane and interfering with the driver integrated circuit, limiting their use in cost-effective, flexible single-layer designs.
Innovation Solution
A single-layer planar antenna design featuring a ground plane and a radiating element on the same substrate, where the radiating element includes a first portion extending parallel to the ground plane and a feed line perpendicular to it, with a second portion coupled to the ground plane between the ends of the first portion, optimizing power transmission and resonance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-layer structure is used for planar antennas, then the antenna can function correctly with ground plane and radiating element, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the ground plane and radiating element onto a single substrate layer, eliminating the need for multiple layers and vias. The feed line is configured to connect to the radiating element without requiring additional layers, thus combining multiple functional layers into one while maintaining antenna performance.
Solution Approach 2:
The patent transitions from a vertical multi-layer configuration to a planar single-layer configuration by redistributing antenna elements and feed lines across the substrate surface. This dimensional rearrangement allows the antenna to maintain its electromagnetic functionality without requiring vertical stacking of layers.
2Reliability
If a multi-layer structure with vias is used, then the antenna can be connected to ground plane, but the manufacturing precision and fabrication complexity increase
Solution Approach 1:
The patent extracts and eliminates the via structures from the antenna design by implementing a single-layer configuration. The ground connection is achieved through planar trace connections on the same substrate layer, removing the need for precise via hole alignment and drilling operations.
3Ease of manufacture
If the feed line is placed in conventional positions, then the antenna can be connected, but it divides the plane and causes parasitic coupling with driver integrated circuit
Solution Approach 1:
The patent employs an asymmetric feed line configuration where the feed line connects to the radiating element at a specific offset position rather than symmetrically. This asymmetric placement allows the feed line to route around the driver integrated circuit area, avoiding parasitic coupling while maintaining single-layer manufacturing simplicity.
Solution Approach 2:
The patent introduces a ground isolation structure as an intermediary element between the feed line and the driver integrated circuit. This ground structure acts as a shield or barrier that prevents parasitic coupling while allowing the feed line to maintain its simplified single-layer routing.
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 enables efficient power transmission and resonance in single-layer circuits, reducing costs and simplifying fabrication, while avoiding parasitic coupling issues common in multi-layer antenna designs.
Implementation Method 1
optimizing power transmission and resonance
Data Source
AI summary
An antenna is disclosed that includes a ground plane extending in a first direction on a substrate and a radiating element occupying a same plane as the ground plane on the substrate, and coupled to the ground plane, the radiating element comprising a first portion with a first end and a second end extending in a substantially parallel direction to the ground plane, a feed line coupled to the first end of the first portion of the radiating element and extending in a substantially perpendicular direction from the first portion of the radiating element and a second portion having a third end and a fourth end, wherein the third end is coupled to the ground plane and the fourth end is coupled to the radiating element at a point between the first end and the second end.