Monopole Antenna Integrated Impedance Matching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Monopole antennas face challenges in miniaturization, as they require separate matching circuits for impedance matching, which occupy space and are cumbersome to design, and the miniaturization process often results in reduced gain and narrowed bandwidth.
Innovation Solution
A monopole antenna design featuring a ground and a radiator with capacitive and inductive radiation parts, allowing for integrated impedance matching without a separate matching circuit, achieved through a strip-shaped first radiation part and bent second radiation parts, enabling miniaturization and efficient frequency operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate matching circuit is provided for impedance matching, then impedance matching is achieved, but the device size increases and design complexity increases
Solution Approach 1:
The patent combines the antenna radiator and matching circuit into a single integrated structure. The radiator includes capacitive parts (first radiation part) and inductive parts (second radiation part) that work together to provide both radiation and impedance matching functions, eliminating the need for a separate matching circuit and reducing overall device size.
Solution Approach 2:
The radiator is designed to perform multiple functions simultaneously: it serves as both the radiating element and the impedance matching circuit. By incorporating both capacitive and inductive elements within the radiator structure itself, the design achieves universal functionality that reduces component count and device volume.
2Reliability
If a separate matching circuit is provided for impedance matching, then impedance matching is achieved, but the design becomes cumbersome and modification is difficult
Solution Approach 1:
The patent combines the antenna radiator and matching circuit into a single integrated structure. The radiator includes capacitive parts (first radiation part) and inductive parts (second radiation part) that work together to provide both radiation and impedance matching functions, eliminating the need for a separate matching circuit and reducing overall device size.
Solution Approach 2:
The radiator structure provides its own impedance matching capability through its inherent capacitive and inductive elements, making the system self-sufficient. The capacitive first radiation part and inductive second radiation part automatically work together to achieve impedance matching without requiring external matching circuits or complex design modifications.
3Volume of moving object
If the antenna is miniaturized by changing shape, then the antenna size is reduced, but the gain is lowered and bandwidth shrinks
Solution Approach 1:
The patent changes the electrical parameters of the antenna by incorporating specific capacitive and inductive elements in the radiator structure. This allows the miniaturized antenna to maintain resonant conditions and achieve acceptable gain and bandwidth performance despite the reduced physical size, overcoming the typical trade-offs of antenna miniaturization.
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 miniaturizes the antenna, eliminates the need for a separate matching circuit, enhances gain, and expands the operating frequency bandwidth, making it suitable for small devices like mobile communication terminals.
Implementation Method 1
The first radiation part may be capacitive. A pair of the second radiation parts may extend from a first end of the second radiation lines and are bent at least once. The second radiation part may be inductive.
Data Source
AI summary
A monopole antenna having a matching function includes a ground; and a radiator having a first radiation part which is connected to a first side of the ground in a strip shape perpendicularly to the ground, and at least one second radiation part which is bent from a first end of the first radiation part at least once.