Nested Ring MIMO Antenna Layout for Dual Polarization Isolation
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Solution Overview
Problem
Electronic devices require antennas with both vertical and horizontal polarization characteristics in a limited space, posing a challenge due to the need for miniaturization and reduced height requirements.
Innovation Solution
A MIMO antenna system comprising a first antenna with a ring structure and a second antenna, each with specific radiator and feed configurations, utilizing inductors and slots to achieve vertical and horizontal polarization characteristics without increasing height, ensuring good isolation and symmetry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the antenna structure is miniaturized to reduce height, then the height space requirement is reduced, but the polarization characteristics may be compromised
Solution Approach 1:
The first antenna (ENG antenna for vertical polarization) is disposed inside the second antenna (MNG antenna for horizontal polarization), with both antennas sharing the same space in the first plane. This nested configuration allows both vertical and horizontal polarization characteristics to coexist in a compact height space, resolving the contradiction between miniaturization and polarization versatility.
Solution Approach 2:
The patent transitions from traditional vertical stacking to a planar configuration where both antennas operate in the same first plane. The ENG antenna uses an inner radiator and outer radiator arrangement with inductor components to achieve vertical polarization in a low-profile manner, while the MNG antenna provides horizontal polarization, both within the same height constraint.
2Length of stationary object
If the antenna structure is miniaturized, then the height space is reduced, but the isolation between antennas may deteriorate
Solution Approach 1:
The first antenna is nested inside the second antenna with both radiators disposed in the same first plane. This nested planar configuration, combined with the specific ENG and MNG antenna designs, maintains good isolation between the vertically polarized and horizontally polarized antennas while achieving height reduction.
3Adaptability or versatility
If both vertical and horizontal polarization characteristics are provided, then the polarization versatility is improved, but the device complexity increases
Solution Approach 1:
The patent combines an ENG antenna structure and an MNG antenna structure into a single MIMO antenna system. The first antenna (ENG) with inner and outer radiators and inductor components is integrated with the second antenna (MNG) with slots in the ring structure, both disposed in the same first plane, achieving both vertical and horizontal polarization in a unified compact design.
Solution Approach 2:
The MIMO antenna system is designed to provide multiple functions: the first antenna provides vertical polarization characteristic while the second antenna provides horizontal polarization characteristic. Both antennas operate simultaneously in the same height space, making the system universal for MIMO applications requiring diverse polarization support.
Data Source
AI summary
A MIMO antenna system related to the field of antenna technologies. A specific solution includes: The MIMO antenna system includes a first antenna and a second antenna, the first antenna includes a first radiator and a second radiator, the first radiator is in a ring structure, the second radiator is disposed inside the first radiator. A first feed is further disposed on the first antenna, and one end of the first feed is disposed on the first radiator and the second radiator. The second antenna includes a third radiator, the third radiator is in a ring structure, a penetration slot is disposed on the third radiator. A second feed is further disposed on the third radiator. The first antenna is disposed inside the second antenna and they are not connected to each other.