Array Antenna With Parasitic Elements For MIMO Miniaturization
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Solution Overview
Problem
Conventional MIMO systems are bulky and inconvenient for miniaturization due to the need for each active antenna to be connected to a separate transmitting or receiving link, limiting their compactness and efficiency.
Innovation Solution
The use of at least two active antennas surrounded by parasitic antennas with controllable loads, where the loads are adjusted via a control circuit to optimize transmitting and receiving directional diagrams, allowing for orthogonal or relevant combinations to be selected based on channel conditions to enhance channel capacity and reduce bit error ratios, thereby enabling miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If each active antenna is connected to a separate transmitting or receiving link in a conventional MIMO system, then the system can achieve multiple spatial streams transmission, but the system size becomes huge and miniaturization is difficult
Solution Approach 1:
The patent combines multiple active antennas and their associated transmitting/receiving links into a single integrated array antenna unit. The array antenna includes multiple antenna elements that can simultaneously handle multiple spatial streams while sharing common control and processing resources, thereby reducing the overall system volume while maintaining channel capacity.
Solution Approach 2:
The array antenna is designed with multi-functional capability to perform both transmitting and receiving operations across multiple spatial streams through a single integrated structure. The antenna elements can be dynamically configured to serve different functions (transmitting, receiving, beamforming) based on channel conditions, eliminating the need for separate dedicated links for each antenna.
2Productivity
If multiple active antennas are used to increase channel capacity, then system performance improves, but the device becomes more complex and harder to miniaturize
Solution Approach 1:
The patent merges multiple antenna elements into a unified array structure with shared control mechanisms. The array antenna uses common signal processing resources and coordinated control to manage multiple spatial streams, reducing the complexity associated with having separate independent antenna systems while maintaining enhanced channel capacity.
Solution Approach 2:
The array antenna employs dynamic beamforming and adaptive signal processing to optimize performance across different channel conditions. By dynamically adjusting the weight and phase of signals across antenna elements, the system can adaptively manage multiple spatial streams without requiring complex static hardware configurations for each potential stream.
3Productivity
If conventional MIMO system is used, then multiple spatial streams can be transmitted, but the system is bulky and inconvenient for miniaturization
Solution Approach 1:
The array antenna structure implements a nested configuration where multiple antenna elements are arranged in a compact, space-efficient manner. The elements are positioned and configured to maximize spatial utilization, allowing the system to maintain multi-stream transmission capability while minimizing the overall device volume through optimized geometric arrangement.
Data Source
AI summary
The present application discloses an array antenna, a method and a device for transmitting and receiving a signal. The array antenna includes at least two active antennas, wherein each active antenna is surrounded by at least two different parasitic antennas, respective parasitic antennas are respectively coupled to controllable loads, and the controllable loads are respectively coupled to a control circuit. With the arrangement of at least two active antennas, when a channel is in a good state, channel capacity can be adjusted by adjusting the controllable loads coupled to the parasitic antennas; and when the channel is not in the good state, the bit error ratio can be reduced by both adjusting the controllable loads coupled to the parasitic antennas and adjusting transmitting directional diagrams of the active antennas according to an adjustment vector, meanwhile, miniaturization can also be realized.