Radiating Slot Antenna Assembly for Circular Polarization in Phones
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Solution Overview
Problem
Conventional mobile phone antennas, such as Inverted-F Antennas, suffer from limited polarization control and structural strength issues due to their linearly polarized design, which compromises their positioning capacity and space utilization.
Innovation Solution
The antenna assembly features a metal protector with radiating slots arranged at specific angles and a phase shift feed assembly generating signals with a phase difference to excite these slots, enabling circular polarization and improving structural strength by reducing the number of antennas on the middle frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Inverted-F Antenna is used in mobile phone, then the antenna can be integrated into the mobile phone body, but the polarization mode cannot be controlled and the antenna becomes linearly polarized, sacrificing polarization gain performance
Solution Approach 1:
The antenna is divided into multiple independent radiating elements (first radiating element, second radiating element, third radiating element, fourth radiating element) with different orientations. Each element can be independently controlled to generate different polarization components, enabling the antenna to achieve circular polarization while maintaining structural integration in the mobile phone.
2Device complexity
If metal middle frame is used to form the antenna, then the antenna structure is simplified, but the structural strength of the middle frame is destroyed and structural space is occupied
Solution Approach 1:
The antenna system merges multiple radiating elements with different polarization orientations into a single integrated antenna module. This combination allows the antenna to achieve circular polarization capability while maintaining a compact structure that does not compromise the middle frame's structural strength or occupy excessive structural space.
3Reliability
If multiple antennas are arranged on the middle frame to achieve circular polarization, then polarization performance is improved, but the number of antennas increases and space utilization is reduced
Solution Approach 1:
The antenna module performs multiple functions within a single integrated structure: it generates multiple polarization components through different radiating elements, achieves circular polarization capability, and maintains compact dimensions for optimal space utilization in the mobile phone. This multi-functional design improves positioning capacity without requiring separate antennas for each function.
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 enhances the controllability of antenna polarization, improves positioning capacity, and optimizes structural space utilization by allowing for more flexible antenna arrangement and enhanced protection of the image acquisition assembly.
Implementation Method 1
a phase shift feed assembly configured to generate a first signal and a second signal having a phase difference of a second set angle
Implementation Method 2
a metal protector of an image acquisition assembly, wherein the metal protector includes a plurality of radiating slots
Data Source
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AI summary
The present application relates to an antenna assembly and a terminal. The antenna assembly includes: a metal protector (200) of an image acquisition assembly, in which the metal protector (200) includes a plurality of radiating slots (210) which include a first radiating slot (211) formed in a first direction (R1) and a second radiating slot (212) formed in a second direction (R2), and the first direction (R1) and the second direction (R2) are arranged at a first set angle; and a phase shift feed assembly (300) configured to generate a first signal and a second signal having a phase difference of a second set angle, in which the first signal excites the first radiating slot (211), and the second signal excites the second radiating slot (212).