Decoupling Circuit Enhances Monopole Antenna Isolation
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Solution Overview
Problem
In electronic products with multiple antennas, mutual coupling between antennas reduces isolation, complicating design and affecting MIMO throughput in limited spaces.
Innovation Solution
A decoupling circuit with a grounding element and connection bars extending to monopole antennas, forming gaps to reduce electromagnetic induction, maintaining radiation patterns and efficiency while enhancing isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple monopole antennas are placed close together in limited space, then the device size is reduced, but mutual coupling between antennas increases and isolation deteriorates
Solution Approach 1:
The patent introduces a decoupling circuit as an intermediary element between the monopole antenna and ground. This circuit includes a connection bar with first and second branches that form a specific geometric structure, acting as a mediator to cancel mutual coupling effects while maintaining compact antenna spacing
Solution Approach 2:
The patent modifies the electrical parameters by introducing a decoupling circuit with specific impedance characteristics. The connection bar structure changes the current distribution and impedance matching, transforming the electromagnetic field characteristics to reduce mutual coupling between antennas
2Object-affected harmful factors
If decoupling circuits are added to enhance antenna isolation, then isolation improves, but device complexity increases
Solution Approach 1:
The decoupling circuit is segmented into distinct functional parts: a connection bar with a first branch connected to the monopole antenna and a second branch connected to ground. This segmentation allows each part to perform a specific function while maintaining overall simplicity
Solution Approach 2:
The connection bar is designed as a thin, planar structure that can be easily integrated into the device. The first and second branches form a compact geometric pattern that achieves decoupling functionality without requiring bulky components or complex three-dimensional structures
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 decoupling circuit effectively improves antenna isolation by 2-3 dB, maintaining radiation efficiency and throughput for MIMO applications without increasing transverse area, optimizing three-dimensional space usage.
Implementation Method 1
forming gaps to reduce electromagnetic induction
Data Source
AI summary
A decoupling circuit for enhancing isolation of two monopole antennas is disclosed. The two monopole antennas substantially symmetrically stand on a bottom, and a gap is formed between the two monopole antennas. The decoupling circuit includes a grounding element located on the bottom and electrically connected to a ground, a connection bar substantially perpendicular to the bottom, including a first terminal electrically connected to the grounding element, a second terminal extending to the gap, a first branch extending from the second terminal of the connection bar to a first monopole antenna of the two monopole antennas, and a second branch extending from the second terminal of the connection bar to a second monopole antenna of the two monopole antennas.