3D Multiple Spiral Antenna for RF Signal Isolation
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Solution Overview
Problem
Current two-dimensional antennas face challenges in supporting full duplex operation and multiple input/multiple output (MIMO) operations, particularly in isolating received RF signals from transmitted RF signals effectively, which is crucial for efficient wireless communication.
Innovation Solution
A three-dimensional multiple spiral antenna structure is introduced, featuring spiral antenna sections that are interwoven and supported by a three-dimensionally shaped substrate, providing enhanced isolation through a RX-TX isolation module and duplexer configuration, allowing for improved signal isolation and increased gain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two-dimensional antenna structures are used, then the device complexity is reduced, but the signal isolation between received and transmitted RF signals deteriorates
Solution Approach 1:
The patent transitions from two-dimensional planar antenna structures to three-dimensional spiral antenna configurations. The spiral arms extend in multiple spatial dimensions, creating vertical and horizontal separation between transmit and receive elements. This dimensional expansion enables better spatial isolation of RF signals while maintaining a compact overall form factor, directly resolving the contradiction between structural simplicity and signal isolation performance.
Solution Approach 2:
The patent implements nested spiral configurations where inner and outer spiral arms are positioned at different spatial levels and orientations. The receive antenna is nested within or alongside the transmit antenna structure, with both antennas sharing部分 space but maintaining electromagnetic isolation through their three-dimensional arrangement. This nesting approach achieves effective signal separation without requiring completely separate antenna systems.
2Object-generated harmful factors
If three-dimensional multiple spiral antenna structure is implemented, then the signal isolation between received and transmitted RF signals is improved, but the device complexity increases
Solution Approach 1:
The patent designs the three-dimensional spiral antenna structure to serve multiple functions simultaneously: it provides both transmit and receive capabilities, achieves full-duplex operation, and supports MIMO configurations. The same spiral geometry provides broadband operation across multiple frequency bands while maintaining signal isolation. This multi-functionality reduces the need for separate specialized components, offsetting the increased structural complexity with operational efficiency.
Solution Approach 2:
The patent divides the antenna system into distinct functional segments: transmit spiral arms, receive spiral arms, feed networks, and isolation structures. Each segment is optimized for its specific function, allowing independent design and tuning. The segmented approach enables systematic management of the complex three-dimensional structure, making it more manageable while achieving superior signal isolation through the spatial separation of functional elements.
3Productivity
If full duplex operation is enabled, then the communication efficiency is improved, but the requirement for signal isolation becomes more stringent
Solution Approach 1:
The patent introduces intermediate isolation structures and filtering elements between the transmit and receive antenna paths. These intermediary components include isolation walls, ground planes, and frequency-selective surfaces that mediate the interaction between transmit and receive signals. The intermediaries provide additional attenuation of transmitted signals before they reach the receive antenna, enabling full-duplex operation by maintaining sufficient signal isolation despite simultaneous transmit and receive operations.
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 three-dimensional multiple spiral antenna achieves effective isolation of RF signals, enabling full duplex operation and MIMO capabilities with increased gain, enhancing the performance of wireless communication devices.
Implementation Method 1
a first and second set of spiral antenna sections (46) interwoven and supported by a three-dimensionally shaped substrate
Implementation Method 2
allowing for improved signal isolation and increased gain through a RX-TX isolation module and duplexer configuration
Data Source
AI summary
A three-dimensional multiple spiral antenna includes a substrate, a plurality of spiral antenna sections, and a feed point module. The substrate has a three-dimensional shaped region and each spiral antenna section is supported by a corresponding section of the three-dimensional shaped region and conforms to the corresponding section of the three-dimensional shaped region such that, collectively, the spiral antenna sections have an overall shape approximating a three-dimensional shape. The feed point module is coupled to a connection point of at least one of the spiral antenna sections.