Balanced Dipole Unit for Broadband Antenna Length Reduction
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Solution Overview
Problem
Existing broadband omnidirectional collinear array antennas face challenges in reducing length, achieving wider working bandwidth, and minimizing the interference of metal supporting members, while maintaining radiation efficiency and gain.
Innovation Solution
A balanced dipole unit with a symmetric structure, where the feeder and ground wire are symmetrically distributed, reduces current coupling and eliminates the need for additional choke circuits, and incorporates open slots to generate additional resonance frequency points, thereby reducing the antenna's length and the influence of metal supporting members, and expanding the working bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If additional choke circuits or increased spacing between radiating units are used to improve radiation gain and efficiency, then the radiation gain and efficiency are improved, but the length of the antenna increases
Solution Approach 1:
The patent removes the additional choke circuits from the antenna structure by using a balanced dipole unit design where the feeder and ground wire are symmetrically distributed. This extraction of unnecessary components reduces the antenna length while maintaining radiation efficiency through the inherent balance of the dipole structure that prevents current coupling without requiring extra choking elements.
Solution Approach 2:
The patent employs symmetric asymmetry - while the overall dipole structure is symmetric, the internal configuration of the feeder and ground wire follows specific asymmetric routing patterns that optimize current distribution. This controlled asymmetry within the symmetric framework allows the antenna to achieve good radiation efficiency without requiring additional choke circuits, thereby reducing overall length.
2Power
If additional choke circuits or increased spacing between radiating units are used to improve radiation gain and efficiency, then the radiation gain and efficiency are improved, but the device complexity increases
Solution Approach 1:
The patent extracts and eliminates the additional choke circuits from the antenna design, reducing device complexity. The balanced dipole unit structure inherently prevents current coupling between elements through its symmetric feeder and ground wire configuration, achieving the same functional effect without the added complexity of separate choking components.
Solution Approach 2:
The patent merges the functions of current regulation and radiation into a single integrated balanced dipole unit structure. The symmetric distribution of feeder and ground wire simultaneously achieves current balance and radiation efficiency, combining multiple functions into one structure rather than requiring separate choke circuits and radiating elements.
3Device complexity
If traditional antenna structures are used, then the structure is simple, but the working bandwidth is narrow
Solution Approach 1:
The patent changes the structural parameters of the dipole unit by symmetrically distributing the feeder and ground wire, which modifies the current distribution characteristics and impedance properties. This parameter change enables the antenna to achieve wider working bandwidth while maintaining structural simplicity, as the symmetric configuration naturally broadens the frequency response without adding complex multi-element structures.
4Strength
If metal supporting members are used to support the antenna structure, then the mechanical strength is improved, but the interference from metal supporting members increases
Solution Approach 1:
The patent extracts and removes metal supporting members from the antenna structure by using a balanced dipole unit design where the feeder and ground wire are symmetrically distributed. This elimination of metal supports reduces electromagnetic interference while the structural integrity is maintained through the inherent balance of the dipole configuration that minimizes the need for additional metal support elements.
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
The solution significantly reduces the length of the broadband omnidirectional collinear array antenna, minimizes the interference from metal supporting members, and enhances the working bandwidth, achieving improved radiation efficiency and gain within a limited size.
Implementation Method 1
the balanced dipole unit circuit is provided with a plurality of open slots 7, and the plurality of open slots 7 arranged on the balanced dipole unit circuit are symmetrically distributed on the circuit carrier 1... the balanced dipole unit may further include at least one non-metal fixing member 6
Data Source
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AI summary
The present invention provides a balanced dipole unit and a broadband omnidirectional collinear array antenna formed by the balanced dipole unit. Balanced dipole unit circuits in the balanced dipole unit are symmetrically distributed on two sides of a circuit carrier, and a feeder and a ground wire in the balanced dipole unit are also symmetrically distributed, so that the balanced dipole unit has a completely symmetrical structure. A principle of the symmetrical structure is the same as a differential design principle and a self-balancing principle in the circuit design, thereby reducing current coupling between the balanced dipole units and eliminating the need of using an additional choke circuit when a broadband omnidirectional collinear array antenna is formed by the balanced dipole unit, so as to reduce a length of the broadband omnidirectional collinear array antenna, and the symmetrical structure design can reduce a radiation influence of a metal supporting member on the broadband omnidirectional collinear array antenna. In addition, by introducing an open slot into the balanced dipole unit circuit, the current distribution of the circuit can be changed to generate a plurality of resonance frequency points, and a working bandwidth of the broadband omnidirectional collinear array antenna formed by the balanced dipole unit is improved.