Interleaved Dual-Band Patch Antenna Array With Passive Ring Isolation
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Solution Overview
Problem
Existing dual-band interleaved patch antenna arrays suffer from poor scanning performance due to significant interference between high-band and low-band elements, particularly at high-band frequencies, which limits coverage and efficiency in wireless devices.
Innovation Solution
A patch antenna array design featuring high-band and low-band antennas arranged in an interleaved configuration with passive metal rings to suppress radiation interference, allowing each band to operate with reduced interference and improved scanning performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If high-band and low-band patch antennas are arranged in an interleaved configuration, then space utilization is improved and dual-band performance is achieved, but scanning performance deteriorates due to significant interference between high-band and low-band elements
Solution Approach 1:
A passive metallic ring element is introduced as an intermediary component between the active low-band patch antenna element and the high-band patch antenna elements. This passive element acts as a mediator that suppresses the harmful electromagnetic coupling and interference from high-band elements to the low-band element, thereby resolving the scanning performance degradation while maintaining the interleaved compact configuration.
Solution Approach 2:
The passive metallic ring element, which could be considered an additional structural component, is utilized to convert the harmful interference effect into a beneficial suppression mechanism. By strategically positioning this passive element, the patent transforms the interference problem into an opportunity to enhance low-band scanning performance through controlled electromagnetic field manipulation.
2Reliability
If passive metallic ring elements are added to suppress interference, then scanning performance is improved, but device complexity increases
Solution Approach 1:
The antenna element structure is segmented into distinct functional components: an active low-band patch antenna element and separate passive metallic ring elements. This segmentation allows each component to be independently optimized and positioned, with the passive rings strategically placed at specific locations around the active element to provide targeted interference suppression without requiring complete redesign of the entire antenna structure.
Solution Approach 2:
Rather than uniformly modifying the entire antenna array, the passive metallic ring elements are selectively positioned at specific local positions around individual active low-band elements where interference from high-band elements is most problematic. This localized approach provides targeted scanning performance improvement while minimizing the overall increase in device complexity.
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
The design enhances scanning performance and coverage by minimizing interference between high-band and low-band elements, optimizing array performance in dual-band or multiband arrays, particularly in thin wireless devices with limited space.
Implementation Method 1
each patch antenna of the plurality of low-band patch antennas includes: an active element; and a passive element comprising a metal ring with an outer edge and an inner edge, the inner edge defining an inner opening
Data Source
AI summary
A patch antenna array includes a plurality of high-band patch antennas configured to radiate at frequencies in a relatively higher frequency band; and a plurality of low-band patch antennas configured to radiate at frequencies in a relatively lower frequency band, the low-band patch antennas interleaved with the high-band patch antennas. Each low-band patch antenna includes: an active element; and a passive element comprising a metal ring with an outer edge and an inner edge, the inner edge defining an inner opening. A corresponding patch antenna includes an active rectangular patch element; and a passive element disposed above the active element with a metal ring defining an inner opening, wherein the passive element is disposed above the active element. The passive, metal ring elements can optimize the dual-band performance by controlling interference. Very narrow substrates can be enabled.