Antenna Bandwidth Extension via Tunable Capacitor
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Solution Overview
Problem
Traditional passive antennas struggle to meet the increasing bandwidth requirements due to limited size, which restricts their ability to cover multiple frequency bands effectively.
Innovation Solution
The design incorporates a capacitor component and radiators with matching and tunable circuits, allowing for adjustable low-frequency resonance without altering the radiator length, thereby extending the antenna's bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the radiator length is increased to extend antenna bandwidth, then the antenna can cover more frequency bands, but the antenna size increases which is not acceptable in size-constrained scenarios
Solution Approach 1:
The patent applies parameter changes by introducing a capacitor component and matching circuits to adjust the electrical characteristics of the antenna system. By changing the capacitance value and impedance parameters through tunable circuits, the antenna resonance frequency and bandwidth are adjusted without physically changing the radiator length, thus extending bandwidth while maintaining compact size.
Solution Approach 2:
The capacitor component serves as an intermediary element between the radiator and ground. This capacitor, with its adjustable capacitance value, mediates the electrical connection and allows tuning of the antenna's resonant frequency and impedance matching, enabling bandwidth extension without increasing the physical radiator dimensions.
2Adaptability or versatility
If traditional passive antenna design is used to maintain simple structure, then the antenna structure remains simple, but the antenna bandwidth is insufficient to cover multiple frequency bands
Solution Approach 1:
The patent transforms the static passive antenna into a dynamic tunable antenna by incorporating variable capacitor components and matching circuits. These dynamic elements allow the antenna to adjust its electrical characteristics in real-time, enabling it to adapt to different frequency bands and expand its operational bandwidth while maintaining a relatively compact structure.
Solution Approach 2:
The tunable antenna design achieves multi-functionality by enabling the same antenna structure to operate across multiple frequency bands through electrical tuning. The capacitor component and matching circuits allow the antenna to serve universal communication needs across different bands without requiring separate antennas for each frequency range.
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 approach enables the antenna to cover a broader range of frequencies, meeting application requirements even in size-constrained scenarios, and allows for flexible tuning of resonance frequencies.
Implementation Method 1
the capacitor component and a distributed inductor of a ground cable can generate low-frequency resonance
Data Source
AI summary
The present invention discloses an antenna and a terminal, which can extend antenna bandwidth. The antenna includes a capacitor component and at least one radiator, where one end of each radiator of the at least one radiator is connected to form a first node, the first node is connected to one end of the capacitor component to form a second node, and the second node is grounded; and the other end of the capacitor component receives a feed signal.