Tunable Antenna System with Switch Circuit for Radiation Pattern Control
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Solution Overview
Problem
Conventional antennas generate fixed radiation patterns, leading to reduced data transmission rates and poor communication quality when the signal reception direction aligns with a null of the antenna radiation pattern.
Innovation Solution
A tunable antenna system comprising a first and second radiation element, a transmission line, and a switch circuit that allows switching between different feeding points to adjust the phase, enabling the generation of various radiation patterns for improved signal reception and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed radiation pattern antenna is used, then the antenna structure is simple, but the communication quality deteriorates when signal reception direction aligns with radiation null
Solution Approach 1:
The patent implements a tunable antenna system that can dynamically switch between different radiation patterns (e.g., omnidirectional, bidirectional, unidirectional) based on the received signal direction. The switch circuit enables the antenna to adapt its radiation pattern in real-time, transforming a static structure into a dynamic one that responds to communication conditions, thereby resolving the contradiction between simple structure and reliable communication.
Solution Approach 2:
The patent changes the electrical parameters of the antenna system by introducing a switch circuit that can alter the feeding configuration between multiple radiation elements. By switching between different feeding points and adjusting phase relationships, the radiation pattern parameters (directionality, gain distribution) are changed adaptively, allowing the antenna to maintain communication quality across different signal reception directions without requiring multiple fixed antennas.
2Productivity
If a fixed radiation pattern antenna is used, then the antenna design is simple, but the data transmission rate reduces when signal reception direction aligns with radiation null
Solution Approach 1:
The tunable antenna system dynamically adjusts its radiation pattern to track the received signal direction, ensuring that the main lobe of the radiation pattern always points toward the signal source. This dynamic adaptation prevents the antenna from operating in null directions, thereby maintaining high data transmission rates. The switch circuit enables rapid reconfiguration of the radiation pattern in response to changing communication conditions.
Solution Approach 2:
The system incorporates feedback mechanisms where the received signal information (direction, strength) is used to control the switch circuit configuration. This feedback loop allows the antenna to automatically adjust its radiation pattern to optimize data transmission, transforming a passive fixed-pattern antenna into an active adaptive system that continuously optimizes performance based on real-time communication conditions.
Data Source
AI summary
An antenna system includes at least a first tunable antenna. The first tunable antenna includes a first radiation element, a second radiation element, a transmission line, and a switch circuit. The transmission line includes a first segment, a second segment, and a phase-adjustment segment. The first radiation element is coupled through the first segment to a first feeding point. The second radiation element is coupled through the second segment to a second feeding point. The switch circuit is configured to switch between the first feeding point and the second feeding point, so that the first feeding point or the second feeding point is arranged for receiving a feeding signal. The phase-adjustment segment has a first end and a second end. The first feeding point is positioned at the first end of the phase-adjustment segment. The second feeding point is positioned at the second end of the phase-adjustment segment.