Side-Member Antenna Structure for Compact Multi-Band 5G Support
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Solution Overview
Problem
Existing antenna structures face challenges in simultaneously supporting low and high frequency bands within limited space, particularly with the introduction of 5G communication, as open loop type switching structures struggle to efficiently transmit and receive signals across multiple frequency bands without increasing the number of conductive patterns.
Innovation Solution
The antenna structure incorporates a conductive portion with multiple interconnected patterns and a switch configuration, allowing for the transmission and reception of signals across different frequency bands, including low, middle, and high bands, by utilizing a closed loop switching scheme and specific current flows to optimize signal resonance and isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an open loop type switching structure is used to support multiple frequency bands, then the ability to transmit and receive signals in different frequency bands is improved, but the difficulty of transmitting and receiving signals in high frequency bands increases and the number of supported frequency bands is limited by the antenna structure volume
Solution Approach 1:
The patent applies a closed loop switching structure that dynamically changes the effective electrical length of the antenna conductor based on the operating frequency band. By using a switching element to connect different portions of the conductive pattern, the antenna can adapt its resonant frequency to match different frequency bands (e.g., low band, high band, millimeter wave), thereby improving signal transmission quality across multiple bands without being limited by the physical antenna volume.
2Adaptability or versatility
If the number of conductive patterns is increased to support more frequency bands, then the frequency band coverage is improved, but the space available for antenna implementation decreases
Solution Approach 1:
The patent implements a multi-functional antenna structure where a single conductive pattern serves multiple frequency bands through a closed loop switching mechanism. The same physical antenna structure can operate in low frequency bands, high frequency bands, and millimeter wave bands by reconfiguring the electrical connection points via the switching element, thereby eliminating the need for separate antennas for each frequency band and saving significant space within the electronic device.
Solution Approach 2:
The patent changes the electrical parameters (effective length, impedance) of the antenna by reconfiguring the switching element connections. By adjusting which portions of the conductive pattern are electrically connected, the antenna's resonant frequency and impedance characteristics are modified to match different frequency bands, allowing one physical structure to cover multiple bands without increasing the number of conductive patterns.
3Volume of moving object
If the antenna structure volume is reduced to fit more electronic objects, then the space utilization is improved, but the number of frequency bands that can be implemented decreases
Solution Approach 1:
The closed loop switching structure enables dynamic reconfiguration of the antenna's electrical length, allowing a compact physical structure to achieve multiple resonant frequencies. The switching element selectively connects different taps along the conductive pattern, transforming a small-volume antenna into a multi-band solution by changing its electrical characteristics rather than its physical dimensions.
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 enables efficient support for multiple frequency bands within a compact design, improving communication performance by maintaining signal quality across legacy and 5G frequency bands without the need for additional conductive patterns, thus enhancing space utilization and reducing signal loss.
Implementation Method 1
optimize signal resonance
Implementation Method 2
transmit and receive signals across different frequency bands
Data Source
AI summary
An electronic device includes a housing including a front plate, a rear plate facing away from the front plate, and a side member surrounding a space between the front plate and the rear plate and connecting one side of the front plate to one side of the rear plate, an antenna structure including at least part of the conductive portion, and a printed circuit board disposed in the space and including at least one processor. At least part of the side member is a conductive portion. The conductive portion includes a first conductive pattern, a second conductive pattern disposed at least partially coupled to the first conductive pattern, and a third conductive pattern disposed at least partially coupled to the first conductive pattern and spaced apart from the second conductive pattern. The antenna structure includes a first feeding part electrically connected to a first location of the first conductive pattern, a second feeding part electrically connected to a second location of the first conductive pattern, wherein the second location is closer to the third conductive pattern than the first location, a first ground part electrically connected to a third location between the first location and the second location of the first conductive pattern, a second ground part electrically connected to a fourth location between the second location and the third location of the first conductive pattern, a switch electrically connected to a fifth location between the first location and the third location of the first conductive pattern, a third ground part electrically connected to a sixth location of the second conductive pattern, and a fourth ground part electrically connected to a seventh location of the third conductive pattern.