3D Antenna Perpendicular PCB Mounting Compact Dongle
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Designing a small USB dongle with sufficient radiation pattern and power is challenging due to size constraints, particularly with the limited space for the antenna, which affects the radiation pattern and signal strength.
Innovation Solution
A three-dimensional antenna is attached to a printed circuit board using a spring-loaded mechanism, oriented perpendicular to the board, and encased in a housing with a wider end cap to minimize interference from the metallic shell, allowing for improved signal reception and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the dongle size is reduced to create a compact form factor, then the convenience and portability are improved, but the antenna size is limited which degrades the radiation pattern and signal strength
Solution Approach 1:
The patent transitions from a planar two-dimensional antenna layout to a three-dimensional antenna structure that extends vertically from the PCB. The antenna includes a vertical radiating element perpendicular to the circuit board, utilizing the third dimension (height) to achieve sufficient radiation pattern and signal strength while maintaining a compact overall dongle volume. This dimensional change allows the antenna to achieve λ/4 radiation efficiency in a space-constrained environment.
2Reliability
If the antenna size is increased to improve radiation pattern, then the signal strength is improved, but the dongle becomes larger and more prone to damage during transit
Solution Approach 1:
The patent embeds the three-dimensional antenna structure within the compact dongle housing, nesting the vertical radiating element inside the housing cavity. The antenna is positioned such that the vertical element extends upward from the PCB while remaining contained within the overall dongle envelope, allowing sufficient antenna height for good radiation pattern while keeping the external dimensions small and protected during transit.
3Ease of manufacture
If a spring-loaded attachment mechanism is used to secure the antenna, then the ease of assembly is improved, but the device complexity increases
Solution Approach 1:
The spring-loaded clips are pre-attached to the antenna structure, allowing the antenna assembly to self-install onto the PCB by simply placing it into the housing cavity. The spring clips automatically engage with corresponding features on the PCB or housing, providing mechanical retention without requiring additional assembly tools or complex fastening procedures. This self-service approach simplifies the manufacturing process while minimizing added complexity.
Data Source
AI summary
A method for constructing a wireless communications apparatus includes attaching a three dimensional antenna having a first end and a second end to a printed circuit board (PCB) using a spring-loaded attachment mechanism. The three dimensional antenna is attached in an orientation that is perpendicular to a mounting surface of the PCB. The first end of the three dimensional antenna is further soldered to the PCB.