MIMO Antenna Multiband Operation via Switching Element Length Adjustment
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Solution Overview
Problem
Conventional MIMO antennas face challenges in miniaturization while maintaining operation across multiple service bands, leading to increased size and noise interference issues.
Innovation Solution
A MIMO antenna design featuring a radiator with a switching element, such as a PIN diode, that adjusts its length to switch between low and high frequency bands by short-circuiting or opening radiation plates, allowing for efficient operation in multiple frequency bands with reduced size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multiband antenna operates in a wide frequency band to cover multiple service bands, then the antenna can receive various wireless communication services, but the antenna size increases and noise interference from unused bands occurs
Solution Approach 1:
The patent employs switching elements (such as PIN diodes) that can dynamically change the electrical length of the radiator between different states. By controlling the switching elements, the antenna can adaptively adjust its resonant frequency to match the desired service band, enabling multiband operation without continuously occupying all frequency ranges, thus reducing noise interference from unused bands.
2Adaptability or versatility
If multiband antennas are used to operate in multiple frequency bands, then various wireless communication services can be received, but the antenna size becomes greater than single-band antennas
Solution Approach 1:
The antenna uses switching elements to dynamically reconfigure the radiator's electrical length. The radiator includes switching elements that can connect or disconnect different portions of the radiating structure, allowing a single compact antenna to electrically simulate multiple longer antenna configurations for different frequency bands, thereby achieving multiband operation without proportionally increasing physical size.
Solution Approach 2:
The patent changes the electrical parameters of the antenna by adjusting the switching states of the switching elements. By changing the effective electrical length and impedance of the radiator through switching element control, the antenna can resonate at different frequencies corresponding to various service bands, enabling multiband functionality within a compact structure.
3Productivity
If multiple multiband antennas are arranged to implement MIMO, then data transmission efficiency is improved, but the overall system size increases significantly
Solution Approach 1:
Each antenna element in the MIMO system uses switching elements to dynamically adjust its electrical length for different frequency bands. This allows multiple antenna elements to be compactly arranged while maintaining the ability to operate across multiple service bands, reducing the overall footprint of the MIMO system compared to using fixed multiband antennas.
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 design enables the MIMO antenna to operate in multiple service bands with improved size reduction and reduced noise interference, achieving omnidirectional radiation patterns and good gain while simplifying the circuit and reducing costs.
Implementation Method 1
a multiple-input multiple-output (MIMO) antenna operable in a multiband including a plurality of antenna elements each comprising a radiator radiating electromagnetic waves, a ground connected to the radiator, and at least one switching element mounted in an area of a lengthwise direction of the radiator and short-circuiting or opening the area of the radiator
Data Source
AI summary
A multiple-input multiple-output (MIMO) antenna operable in a multiband includes a plurality of antenna elements each including a radiator radiating electromagnetic waves, a ground connected to the radiator, at least one switching element mounted in an area of lengthwise direction of the radiator and short-circuiting or opening the area of the radiator.