Terminal Antenna Common-Mode Feeding for High Isolation
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Solution Overview
Problem
Current antenna systems face limitations in mode flexibility and high isolation challenges, particularly in the disposition and feeding mechanisms, which restrict the location and operation of multiple antennas in electronic devices.
Innovation Solution
The introduction of a terminal antenna system with a common-mode feed between an excitation part and a radiation part, allowing for N-time wavelength excitation, and a high-isolation antenna system combining low-impedance common-mode feeding with differential-mode feeding to achieve enhanced isolation and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed feeding mode is used for the antenna, then the feeding structure is simple, but the disposition location and disposition mode of the feed are restricted
Solution Approach 1:
The patent applies universality by designing a feeding structure that supports multiple feeding modes (differential mode and common mode) within a single antenna system. The antenna can operate in different modes (0.5-time wavelength, 1.5-time wavelength, etc.) by switching between differential mode feeding and common mode feeding, making the feeding structure adaptable to various disposition locations and modes without requiring separate feeding structures for each mode.
2Adaptability or versatility
If multiple antennas are disposed on a terminal device, then wireless communication capability is enhanced, but achieving high isolation between antennas becomes difficult
Solution Approach 1:
The patent applies parameter changes by utilizing the common mode feeding to excite different wavelength modes (0.5-time, 1.5-time, 2-time, etc.) of the antenna. By changing the operating wavelength parameter, the antenna can achieve high isolation from other antennas operating at different wavelengths, even when multiple antennas are disposed in close proximity on a terminal device.
3Adaptability or versatility
If conventional differential mode feeding is used, then the feeding mechanism is established, but excitation of N-time wavelength modes is limited
Solution Approach 1:
The patent introduces common mode feeding as an intermediary mechanism that enables the excitation of N-time wavelength modes. The common mode feed acts as a mediator between the power source and the antenna, creating a feeding mechanism that complements the conventional differential mode feeding. This intermediary feeding approach allows the antenna to operate in multiple wavelength modes without significantly increasing the overall complexity of the feeding system.
Data Source
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AI summary
Embodiments of this application disclose a terminal antenna and a high isolation antenna system, and relate to the field of antenna technologies, so that a new N-time wavelength excitation solution is provided, and can be applied to the high isolation antenna system. A specific solution is as follows: The terminal antenna includes a first excitation part and a first radiation part, and the first excitation part is disposed at a middle location of the first radiation part. A common-mode feed is disposed on the first excitation part, and the common-mode feed is disposed between the first radiation part and the first excitation part. The common-mode feed is one or two feeds disposed between the first excitation part and the first radiation part.