Stacked Multi-Band Antenna Layout for Polarization and Isolation
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Solution Overview
Problem
Existing antennas face challenges in efficiently operating on multiple bands and maintaining polarization across various transmission and reception angles, leading to potential signal interference and increased size.
Innovation Solution
The design incorporates a multi-band antenna with specific coupling sections, radiation patches, and ground layers to minimize overlap and interference, featuring a feeding layer with ground points and annular slots, along with a trace to suppress signal interference and a damage suppressor to prevent cover damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple patch antennas are arranged sequentially to support multiple frequency sections, then multi-band operation capability is improved, but isolation between antenna layers deteriorates and device complexity increases
Solution Approach 1:
The antenna system is divided into multiple independent patch antennas (first through fifth patch antennas) operating at different frequency sections (L-band, S-band, C-band, X-band, Ku-band). Each patch antenna is designed with specific dimensions and positions to operate independently at its designated frequency, reducing mutual interference while maintaining multi-band capability.
Solution Approach 2:
The patent transitions from planar antenna arrangements to a three-dimensional stacked configuration where patch antennas are arranged in multiple layers (first radiating layer and second radiating layer) separated by dielectric layers. This vertical dimensionality allows better isolation between frequency sections while maintaining compact form factor.
2Adaptability or versatility
If antenna size is increased to improve reception across multiple bands, then multi-band reception capability is improved, but device size increases
Solution Approach 1:
Multiple patch antennas of different sizes and frequency sections are nested within a compact stacked structure. Smaller patch antennas for higher frequency bands (C-band, X-band, Ku-band) are positioned in the second radiating layer, while larger patch antennas for lower frequency bands (L-band, S-band) are in the first radiating layer, achieving multi-band coverage without proportional size increase.
Solution Approach 2:
The patent varies key parameters including patch antenna dimensions, dielectric layer thicknesses, and spacing between radiating layers to optimize performance across different frequency bands. By adjusting these parameters, the antenna system achieves wide bandwidth operation without requiring excessive physical size.
3Ease of manufacture
If conventional feeding structures are used to simplify manufacturing, then ease of manufacture is improved, but signal interference between feed lines increases
Solution Approach 1:
Dielectric layers are introduced as intermediary materials between the ground layer and radiating layers, and between adjacent feed lines. These dielectric layers provide electrical isolation and reduce signal interference while maintaining the simplicity of planar feeding structure fabrication through standard PCB or laminated board techniques.
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 configuration allows for reduced antenna size while ensuring all polarized waves are received irrespective of polarization angles, enhancing signal reception and reducing interference.
Implementation Method 1
a feeding layer positioned between the first radiating layer and the second radiating layer, the feeding layer including: a coupling patch configured to couple the second radiating layer and the ground layer
Implementation Method 2
The first radiation patch may include a plurality of first edges, the second radiation patch may include a plurality of second edges, the first radiation patch may include a first cut area between a pair of first edges adjacent to each other, and the second radiation patch may include a second cut area between a pair of second edges adjacent to each other
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
An antenna includes a first radiating layer including a first radiation patch, a slit formed in the first radiation patch, and a first feed point provided in the first radiation patch, a second radiating layer including a second radiation patch provided below the first radiation patch and a second feed point provided in the second radiation patch, a feeding layer including a coupling patch provided below the second radiation patch and at least one ground point provided in the coupling patch, a ground layer provided below the coupling patch, a feed line provided between the second radiation patch and the ground layer and including a third feed point, a signal via connecting the first feed point, the second feed point, and the third feed point, and a ground via connecting the at least one ground point and the ground layer.