Multi Mode Array Antenna Isolation via Orthogonal Fields
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Solution Overview
Problem
Array antennas with closely arranged elements face challenges in minimizing interference and maintaining high nulling performance due to mutual coupling and spatial diversity reduction, making them difficult to integrate into small devices.
Innovation Solution
The array antenna configuration includes a monopole antenna and a patch antenna operating in different modes with orthogonal electric or magnetic fields, using weight multipliers and adaptive gain calculations to minimize coupling and maximize impedance matching, allowing for close placement without performance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If array antenna elements are arranged closely to reduce device size, then the device occupies less space, but mutual coupling increases and nulling performance degrades
Solution Approach 1:
The patent changes the operating parameters of antenna elements by utilizing different resonant modes (TM11 mode for first element, TE10 mode for second element) to achieve orthogonal radiation patterns. This parameter change allows closely spaced elements to maintain low mutual coupling and high nulling performance despite reduced array size
Solution Approach 2:
The patent introduces modal diversity as an additional dimension of differentiation between antenna elements. By operating elements in different resonant modes with orthogonal field patterns, the system achieves spatial separation of electromagnetic fields even when physical distance between elements is minimal, thus maintaining nulling performance in compact configurations
2Volume of moving object
If array antenna elements are arranged closely to reduce device size, then the device occupies less space, but mutual coupling increases and spatial diversity reduces
Solution Approach 1:
The patent utilizes different resonant mode parameters (TM11 vs TE10 modes) to create orthogonal radiation patterns between closely spaced elements. This parameter differentiation maintains spatial diversity by ensuring that elements radiate in fundamentally different electromagnetic field configurations, preserving adaptability in compact arrays
Solution Approach 2:
The patent adds modal diversity as an extra dimension to differentiate antenna elements. By operating in different resonant modes with orthogonal field patterns, the system achieves independent spatial characteristics even at minimal physical separation, maintaining spatial diversity in reduced-size configurations
3Volume of moving object
If array antenna elements are arranged closely to reduce device size, then the device occupies less space, but interference between elements increases
Solution Approach 1:
The patent changes the operational parameters of antenna elements by assigning different resonant modes (TM11 for first element, TE10 for second element). This parameter differentiation creates orthogonal radiation patterns that minimize electromagnetic interference between closely spaced elements, allowing compact array configuration without excessive interference
4Volume of moving object
If array antenna elements are arranged closely to reduce device size, then the device occupies less space, but impedance matching performance degrades
Solution Approach 1:
The patent utilizes different resonant mode parameters to achieve orthogonal field patterns between closely spaced elements. This parameter differentiation reduces mutual coupling effects, thereby maintaining impedance matching performance even when elements are arranged in a compact configuration
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 achieves high isolation and low correlation between antenna elements, maintaining effective nulling performance and spatial diversity even at short array distances, suitable for compact devices.
Implementation Method 1
a correlation between an electric field of the first mode and an electric field of the second mode falls below a first threshold which is predetermined, or a correlation between a magnetic field of the first mode and a magnetic field of the second mode falls below a second threshold which is predetermined
Implementation Method 2
the electric field of the first mode and the electric field of the second mode may be orthogonal, or the magnetic field of the first mode and the magnetic field of the second mode may be orthogonal
Data Source
AI summary
The disclosure relates to an array antenna, and more specifically, the array antenna configured by arranging a plurality of antenna elements at close positions. An array antenna is provided. The array antenna includes a first antenna operating in a first mode, and a second antenna operating in a second mode, wherein a correlation between an electric field of the first mode and an electric field of the second mode falls below a first threshold which is predetermined, or a correlation between a magnetic field of the first mode and a magnetic field of the second mode falls below a second threshold which is predetermined.