Radiating Element With Dividing Pieces And Loading Elements
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Solution Overview
Problem
Existing wideband antennas, such as those for TD-SCDMA, DCS, UMTS, and WiMax systems, face challenges in achieving satisfactory relative bandwidth and impedance performance, particularly in dual-polarized configurations.
Innovation Solution
A radiating element design featuring a supporting element with symmetrically disposed dividing pieces forming polygonal hollowed spaces, loading elements extending from the supporting element, and electrical connecting elements for connecting radiating units to a feeding cable, which enhances impedance performance and bandwidth by providing dual-polarized directional radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dual-polarized antenna radiating element with fan-shaped hollowed radiating slices is used, then the antenna structure is formed, but the relative bandwidth is not satisfactory
Solution Approach 1:
The radiating element is divided into multiple radiating units (first, second, third, and fourth radiating units) arranged in specific patterns. Each radiating unit contains dividing pieces that create polygonal hollowed spaces, segmenting the overall structure to achieve dual-polarized radiation characteristics and broaden the bandwidth to cover 1710-2690 MHz while maintaining manageable structural complexity
Solution Approach 2:
The patent introduces loading elements that extend outward from the supporting element along the edges of radiating units, adding a dimensional element to the structure. This dimensional enhancement modifies the current distribution and impedance characteristics, enabling broader bandwidth performance without proportionally increasing structural complexity
2Adaptability or versatility
If wideband antenna covers frequency range from 1710 to 2690 MHz, then bandwidth is improved, but impedance performance deteriorates
Solution Approach 1:
Different radiating units are configured with specific orientations and dividing piece arrangements tailored to their positions. The first and second radiating units have different orientations compared to the third and fourth units, creating local variations in current distribution that maintain consistent impedance performance (VSWR < 1.4) across the entire wide frequency range of 1710-2690 MHz
Solution Approach 2:
The loading elements are positioned at specific distances from the supporting element and have defined dimensions relative to the radiating unit edges. These parameter specifications optimize the impedance matching across the wide bandwidth, ensuring VSWR remains below 1.4 throughout the 1710-2690 MHz operating range
3Adaptability or versatility
If multiple radiating units are arranged to provide dual-polarized radiation, then radiation performance is improved, but isolation between polarizations deteriorates
Solution Approach 1:
The dividing pieces within each radiating unit create asymmetric polygonal hollowed spaces that break symmetry in the current distribution. This asymmetric geometry, combined with the specific arrangement of four radiating units, enhances polarization isolation (greater than 28 dB) while maintaining effective dual-polarized radiation in the vertical and horizontal planes
Solution Approach 2:
The loading elements serve as intermediary structures between the supporting element and the radiating units. These loading elements extend along the edges of radiating units and act as impedance transformation elements that improve isolation between orthogonal polarizations by controlling the coupling between adjacent radiating units
Data Source
AI summary
A radiating element includes a supporting element and a plurality of radiating units formed at one end of the supporting element. Each of the radiating units has a lower surface facing towards the supporting element and an upper surface facing away from the supporting element. The radiating element further includes a first and second dividing pieces symmetrically disposed on each of the radiating units. The radiating element also includes a loading element formed on the lower surface of each of the plurality of radiating units, wherein the loading element extends outward from the supporting element and along an edge of the radiating unit. Moreover, the radiating element includes an electrical connecting element for connecting the radiating units to a feeding cable, the electrical connecting element being lower than the upper surfaces of the radiating units.