Double Ground Terminal PIFA Bandwidth
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Solution Overview
Problem
Conventional antenna designs for mobile devices, such as PIFAs, face challenges in miniaturization, leading to limited height, smaller bandwidth, and lower antenna gain, which restricts the spacing between the body part and the ground plane, resulting in a tradeoff between height and bandwidth.
Innovation Solution
A mobile apparatus with a grounding part featuring double ground terminals, where the distance between the terminals is associated with the wavelength of RF signals, allowing for increased bandwidth without requiring adjustments in antenna height, and incorporating a conductive element to enhance impedance matching and current distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the PIFA is disposed internally inside the mobile apparatus with miniaturization design, then the antenna height is reduced, but the bandwidth and antenna gain are reduced
Solution Approach 1:
The grounding part is segmented into multiple grounding terminals (first grounding terminal and second grounding terminal) instead of a single ground connection. This segmentation allows the antenna to support multiple resonance modes and frequencies, thereby increasing bandwidth while maintaining a compact height suitable for internal disposal in mobile apparatus
Solution Approach 2:
The invention transitions from a traditional single-plane ground structure to a multi-dimensional grounding configuration with multiple terminals positioned at different locations. This dimensional change in the grounding structure enables the antenna to achieve broader bandwidth and improved performance without increasing height
2Length of moving object
If the PIFA is disposed internally inside the mobile apparatus with miniaturization design, then the antenna height is reduced, but the antenna gain is reduced
Solution Approach 1:
The grounding part is segmented into multiple grounding terminals (first grounding terminal and second grounding terminal) instead of a single ground connection. This segmentation allows the antenna to support multiple resonance modes and frequencies, thereby increasing bandwidth while maintaining a compact height suitable for internal disposal in mobile apparatus
Solution Approach 2:
The invention transitions from a traditional single-plane ground structure to a multi-dimensional grounding configuration with multiple terminals positioned at different locations. This dimensional change in the grounding structure enables the antenna to achieve broader bandwidth and improved performance without increasing height
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 design effectively increases the antenna's bandwidth, reduces specific absorption ratio (SAR), and minimizes the phantom effect, enabling thinner models while maintaining performance.
Implementation Method 1
the design of the PIFA 100 mainly acquires a plurality of required resonance frequencies through two current paths with different lengths
Implementation Method 2
the conductive element is used to increase an impedance match of the main body of the antenna in the mobile apparatus
Data Source
AI summary
A mobile apparatus is provided. The mobile apparatus includes an antenna and a ground plane. The antenna is used to receive or transmit a radio frequency signal and includes a grounding part having a first ground terminal and a second ground terminal. Wherein, a distance between the first ground terminal and the second ground terminal is associated with a wavelength of the radio frequency signal. The ground plane is electrically connected to the grounding part of the antenna through the first ground terminal and the second ground terminal. The present invention effectively reduces a specific absorption ratio and a required height for setting the antenna such that a bandwidth of the antenna is increased.