Multi-Antenna Housing Structure for CA and MIMO Isolation

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Solution Overview

Problem

Frequency interference and degradation in antenna performance occur in electronic devices supporting both cellular communication protocols and WLAN protocols due to the arrangement of multiple antennas, leading to reduced isolation and performance issues.

Innovation Solution

The electronic device incorporates a housing with isolated conductive portions and a polymer structure, featuring a conductive pattern for MIMO and CA operations, along with a control circuit that manages signal transmission and reception based on the activation state of the wireless communication circuits to minimize interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple antennas are arranged in the electronic device to support both CA and MIMO technologies, then the communication functionality is improved, but frequency interference and antenna performance degradation occur

Engineering Contradiction:

Improvecommunication functionalityVSAvoidfrequency interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The antenna system is segmented into multiple independent antenna elements (first antenna, second antenna, third antenna, fourth antenna) with distinct radiation patterns. Each antenna is configured to operate on specific frequency bands, dividing the overall communication function into separate operational segments that can be independently controlled and optimized.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different antennas are assigned different local qualities in terms of their radiation characteristics and frequency band coverage. The first and second antennas are configured for first frequency bands while the third and fourth antennas are configured for second frequency bands, creating local quality differences that enable frequency diversity and reduce interference.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If multiple antennas are arranged in the electronic device to support both CA and MIMO technologies, then the communication functionality is improved, but antenna performance degradation occurs

Engineering Contradiction:

Improvecommunication functionalityVSAvoidantenna performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent utilizes spatial dimensionality by arranging four antennas in a two-by-two configuration with specific radiation patterns. The first and third antennas have radiation patterns oriented in one direction while the second and fourth antennas have radiation patterns oriented in another direction, creating three-dimensional spatial diversity that improves reliability through multiple independent signal paths.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The antenna system employs a composite structure combining multiple antenna elements with different radiation characteristics and frequency band coverages. This composite antenna system integrates the strengths of individual antennas to achieve both wide frequency coverage and high performance reliability through diversity combining.

Inventive Principle:

Principle #40Composite materials

3Device complexity

If antennas for cellular protocol and WLAN protocol are arranged together, then device integration is improved, but isolation between antennas deteriorates

Engineering Contradiction:

Improvedevice integrationVSAvoidantenna isolation

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The antenna system is segmented into two independent groups: the first and second antennas configured for cellular communication protocols, and the third and fourth antennas configured for WLAN communication protocols. This segmentation creates electrical and spatial isolation between the two protocol systems while maintaining physical integration within the same device housing.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different local qualities are assigned to different antenna groups based on their protocol requirements. The cellular antennas are optimized for cellular frequency bands and radiation patterns, while the WLAN antennas are optimized for WLAN frequency bands and radiation patterns, creating local quality differentiation that ensures protocol-specific performance and isolation.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11848477B2Electronic apparatus for transmitting signals through plurality of antennas, and structure therefor

Publication Date: 2023.12.19 SAMSUNG ELECTRONICS CO LTD

AI summary

An electronic device may include a housing including a first conductive portion, a second conductive portion electrically isolated from the first conductive portion, and a third conductive portion electrically isolated from the first conductive portion and the second conductive portion, a first wireless communication circuit disposed in the space and to transmit or receive a first signal and a second signal, which have a frequency in a first frequency range, through Multiple Input Multiple Output (MIMO) using the first conductive portion and the second conductive portion, respectively, and a second wireless communication circuit disposed in the space and transmit or receive a third signal and a fourth signal having a frequency in a second frequency range through Carrier Aggregation (CA) using the third conductive portion and the conductive pattern, respectively.