Parallel Antenna Filter Structure for 5G Power Handling

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Solution Overview

Problem

The increasing number of antennas and RF parts in 5G communication devices necessitates a reduction in filter size and weight while maintaining performance, as conventional high-power filters are cumbersome and difficult to mass-produce.

Innovation Solution

Implementing a combine filter structure with multiple low-power filters, each with impedance matching circuits, to distribute power and reduce impedance mismatch, allowing for miniaturization and mass production.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If conventional high-power filters are used, then power handling capability is sufficient, but filter size and weight increase

Engineering Contradiction:

Improvepower handling capabilityVSAvoidfilter weight

Core Design Contradiction:

PowerVSWeight of stationary object

Solution Approach 1:

The patent divides a single high-power filter into multiple low-power filters connected in parallel. Each low-power filter handles a portion of the total power, allowing the use of smaller, lighter individual filter units while collectively achieving the required power handling capability. This segmentation resolves the contradiction by distributing the power load across multiple smaller components.

Inventive Principle:

Principle #1Segmentation

2Power

If conventional high-power filters are used, then power handling capability is sufficient, but manufacturing complexity and difficulty increase

Engineering Contradiction:

Improvepower handling capabilityVSAvoidmanufacturing ease

Core Design Contradiction:

PowerVSEase of manufacture

Solution Approach 1:

By segmenting the filter system into multiple identical low-power filter units, the patent enables standardized mass production of each unit. This approach simplifies manufacturing processes, reduces complexity, and improves ease of production compared to manufacturing single high-power filters, while still achieving the required overall power handling capability through parallel configuration.

Inventive Principle:

Principle #1Segmentation

3Volume of stationary object

If multiple low-power filters are used in parallel, then filter size is reduced, but impedance mismatch increases

Engineering Contradiction:

Improvefilter volumeVSAvoidimpedance matching

Core Design Contradiction:

Volume of stationary objectVSReliability

Solution Approach 1:

The patent introduces impedance matching circuits as intermediary components between the parallel-connected low-power filters and the system. These matching circuits act as mediators that adjust and equalize the impedance of each filter branch, eliminating impedance mismatch issues while allowing the use of multiple small-volume low-power filters in parallel configuration.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Productivity

If multiple low-power filters are used, then productivity and mass production are improved, but device complexity increases

Engineering Contradiction:

Improvemass production capabilityVSAvoidfilter structure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the filter system into multiple identical, standardized low-power filter units that can be independently manufactured and tested. This modular segmentation enables parallel mass production of each unit, significantly improving productivity. The standardized design of each segment simplifies assembly and testing, offsetting the increased component count with manufacturing efficiency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent combines multiple identical low-power filter units in a standardized parallel configuration with integrated impedance matching circuits. This merging approach creates a modular assembly that, while consisting of multiple components, benefits from standardized interfaces and repeating patterns that simplify overall system integration and testing, thereby managing device complexity despite increased component count.

Inventive Principle:

Principle #5Merging (Combining)

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 solution achieves reduced size and improved productivity by using low-power filters, such as BAW filters, while maintaining performance and reducing defects, thus enabling efficient 5G communication devices.

Implementation Method 1

using low-power filters, such as BAW filters

Methodology Applied

Scientific EffectBulk Acoustic Wave:

Implementation Method 2

BAW (Bulk Acoustic Wave) filter which may include a piezoelectric substrate

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Data Source

PatentUS12470236B2Antenna filter and electronic device comprising same in wireless communication system

Publication Date: 2025.11.11 SAMSUNG ELECTRONICS CO LTD

AI summary

A 5th generation (5G) or pre-5G communication system for supporting a higher data transfer rate than 4th generation (4G) communication systems such as long term evolution (LTE). An apparatus for radiating a signal in a wireless communication system may include: a power amplifier; an antenna; and a combine filter unit configured to transfer an output signal of the power amplifier to the antenna. The combine filter unit may include: a first impedance matching circuit; a second impedance matching circuit; and a plurality of filters coupled in parallel between the first impedance matching circuit and the second impedance matching circuit. Allowable power of each of the plurality of filters may be lower than a maximum and/or predetermined power output of the power amplifier.