Multilayer 5G CPE Antenna Structure for Wideband Coverage
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Solution Overview
Problem
Current 5G terminal antennas face challenges in efficiently covering the wide range of frequency bands required for 5G communication systems, particularly in millimeter wave frequencies, which hinders the development and commercial use of 5G systems.
Innovation Solution
A novel '4+1' antenna structure is proposed, comprising a multilayer PCB substrate with a low band direct feed magneto-electric dipole and four high band coupling feed magneto-electric dipoles arranged around the low band dipole, enabling coverage of 5G frequency bands from 24-43 GHz and 59-71 GHz. This structure includes T-shaped and U-shaped electric dipole conductive parts with metal via arrays for magnetic dipoles, allowing for efficient radiation and integration on PCBs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single antenna structure is used to cover multiple 5G frequency bands (24-43 GHz and 59-71 GHz), then the adaptability and versatility are improved, but the device complexity increases due to the need for multilayer PCB substrates and multiple radiation elements
Solution Approach 1:
The antenna structure is divided into multiple functional segments: a first substrate for lower band operation, a second substrate for higher band operation, multiple radiation elements with different geometries (first, second, and third radiation elements), and multiple feed structures. Each segment is optimized for specific frequency ranges, allowing the overall structure to cover both 24-43 GHz and 59-71 GHz bands effectively while managing complexity through modular design
Solution Approach 2:
The antenna structure is designed to perform multiple functions simultaneously: it supports both lower band (24-43 GHz) and higher band (59-71 GHz) 5G frequency ranges, provides both direct feed and coupled feed mechanisms, and incorporates multiple radiation patterns through different element geometries. This multi-functionality allows a single antenna structure to replace what would traditionally require multiple separate antennas
2Adaptability or versatility
If multiple radiation elements and feed structures are integrated to achieve wide bandwidth, then the frequency coverage is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The antenna structure employs a nested configuration where the first radiation element is positioned on the first substrate, the second radiation element is positioned on the second substrate, and the third radiation element couples between them. The feed structures are nested within this arrangement, with the first feed structure connecting to the first radiation element and the second feed structure coupling to the second radiation element. This nesting allows compact integration while maintaining precise electrical connections through controlled impedance traces and coupled feed mechanisms
Solution Approach 2:
The third radiation element acts as an intermediary structure that couples the first and second substrates together. It provides a mechanical and electrical bridge between the lower band and higher band radiation elements, facilitating signal transmission across the wide bandwidth while simplifying the integration process by providing a standardized coupling interface between substrates
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 antenna structure achieves wide bandwidth, high gain, and easy integration, effectively covering all planned 5G frequency bands, making it suitable for 5G CPE applications, especially in millimeter wave frequencies, and enhancing the performance of 5G communication systems.
Implementation Method 1
A novel antenna element for a 5G CPE application contains a multilayer PCB (printed circuit board) substrate and two kinds of radiation element. The radiation element includes a low band direct feed magneto-electric dipole and at least four high band coupling feed magneto-electric dipoles.
Implementation Method 2
The low band magneto-electric dipole contains two 'T' shaped electric dipole conductive parts and a magnetic dipole composed of a pair of metal vias array, the feed structure is a metal via between this metal vias array and connect the electric dipole conductive part directly.
Data Source
AI summary
An RF antenna includes a first substrate having a first top surface and a first bottom surface and a second substrate having a second top surface and a second bottom surface, wherein the first substrate is disposed on top of the second substrate, the second bottom surface including a ground plane disposed thereon. The RF antenna further includes a low-band (LB) radiation element disposed on the first top surface of the first substrate. The LB radiation element is to resonate within a first frequency band to transmit and receive RF signals associated with the first frequency band. The RF antenna further includes multiple high-band (HB) radiation elements disposed between the first bottom surface of the first substrate and the second top surface of the second substrate. Each HB radiation element is to resonate within a second frequency band to transmit and receive RF signals associated with the second frequency band.