T-Shaped Low-Band Dipole Unit for Flexible Nested Array Antennas
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current multi-frequency band array antennas face limitations in gap constraints between high-frequency and low-frequency band units, leading to coupling and blocking issues, and lack flexibility in beam adjustment on the horizontal plane.
Innovation Solution
A low-frequency band dipole unit with a T-shaped microstrip dipole arm structure in a criss-cross perpendicular arrangement, featuring upward bending radiation arms and a support structure for reduced coupling and enhanced flexibility, allowing for flexible nesting and beam width adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If low-frequency band dipole units are arranged in a bowl-shaped form to nest with high-frequency band dipole units, then nesting is achieved, but the flexibility of arrangement and beam adjustment is reduced
Solution Approach 1:
The patent makes the low-frequency band dipole unit structure movable and adjustable rather than fixed in a bowl-shaped form. The support structure allows the radiation arms to be positioned at different angles and locations, enabling dynamic adjustment of the unit's orientation and position to achieve both compact nesting and flexible arrangement.
Solution Approach 2:
The low-frequency band dipole unit is divided into separate components including radiation arms and a support structure. This segmentation allows the radiation arms to be independently positioned and adjusted, providing flexibility in arrangement while maintaining compact nesting capability through coordinated positioning of the segmented parts.
2Ease of manufacture
If gaps between high-frequency band units and low-frequency band units are constrained to satisfy integral multiple relationship, then nesting is simplified, but coupling and blocking between bands are exacerbated
Solution Approach 1:
The patent applies different structural characteristics to different parts of the antenna system. The low-frequency band dipole unit has a specific support structure design that locally optimizes the gap configuration, allowing non-integral multiple gaps in certain regions to reduce coupling and blocking, while maintaining overall nesting simplicity through standardized unit designs.
3Adaptability or versatility
If the size of the bottom plate and height of isolating bars are adjusted to control beam widths, then beam adjustment is achieved, but the device complexity and weight increase
Solution Approach 1:
The patent achieves beam adjustment by changing the parameters of the support structure, specifically the height and positioning of isolating bars, rather than adjusting the entire bottom plate size. This localized parameter adjustment provides beam control capability while minimizing the increase in overall device weight and complexity.
Data Source
AI summary
Disclosed are a low-frequency band dipole unit, a multi-frequency band array antenna and an adjustment method therefor. The low-frequency band dipole unit includes a first microstrip dipole arm (1), a second microstrip dipole arm (2) and a support structure (3). The first microstrip dipole arm (1) and the second microstrip dipole arm (2) are each in a T-shaped thin arm structure with two vertical arms upwards, each have a thickness in the order of millimeters, and are each in a straight line when viewed from above. The support structure (3) has a slot structure for clamping and supporting the first microstrip dipole arm (1) and the second microstrip dipole arm (2). The multi-frequency band array antenna has a plurality of columns and/or quasi-columns therein, and at least one column or quasi-column of the plurality of columns and/or quasi-columns is composed of the foregoing low-frequency band dipole units completely. The low-frequency band dipole unit has weak coupling and low blocking characteristics, is flexibly nested, and has a great arrangement freedom. The multi-frequency band array antenna has good arrangement freedom and beam adjustment freedom.