Antenna Radiating Element Crosstalk Reduction via Segmented Grounding
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Solution Overview
Problem
In multi-band antennas, the common grounding of power feed PCBs and radiating modules leads to significant crosstalk between signals transmitted and radiated, affecting the antenna's performance.
Innovation Solution
The radiating element design includes separate independent grounding areas for the power feed PCB and the radiating module, with signal cables positioned on distinct surfaces of the power feed PCB to reduce crosstalk by isolating the radiating module from the power feed PCB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the power feed PCB and radiating module are commonly grounded, then the structure is simple and easy to manufacture, but strong crosstalk occurs between the transmitted signal and radiated signal
Solution Approach 1:
The common grounding structure is segmented into separate grounding areas: a first grounding area on the first surface of the power feed PCB for the radiating module, and a second grounding area on the second surface of the power feed PCB for the power feed PCB itself. This segmentation isolates the grounding paths to reduce crosstalk while maintaining structural simplicity.
Solution Approach 2:
The grounding structure transitions from a single-plane common ground to a three-dimensional arrangement with grounding areas on opposite surfaces of the power feed PCB. The first grounding area is disposed on the first surface while the second grounding area is disposed on the second surface, creating spatial separation that reduces electromagnetic coupling and crosstalk.
2Object-generated harmful factors
If the grounding area of the radiating module and grounding area of the power feed PCB are separated into independent areas, then crosstalk is reduced, but the device complexity increases
Solution Approach 1:
The separate grounding areas for the radiating module and power feed PCB are merged into a single integrated power feed PCB structure. The first grounding area and second grounding area are both formed on the same PCB substrate, eliminating the need for separate grounding structures or additional components, thus reducing overall device complexity.
Solution Approach 2:
The power feed PCB serves multiple functions: it provides power feeding, signal transmission, and grounding for both the radiating module and itself. By integrating multiple grounding areas on a single PCB, the structure achieves multi-functionality without increasing component count or structural complexity.
Data Source
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AI summary
Embodiments of the present invention relate to the communications field, and provide a radiating element of an antenna and an antenna, so as to reduce a crosstalk between a signal transmitted by a power feed PCB and a signal radiated by a radiating module. The radiating element includes: a reflection module, a power feed PCB disposed on the reflection module and electrically connected to the reflection module, and a radiating module disposed on the power feed PCB and electrically connected to the power feed PCB, where a first surface of the power feed PCB includes a first signal cable and a grounding area of the radiating module, a second surface of the power feed PCB includes a grounding area of the power feed PCB and a second signal cable, the first signal cable is electrically connected to the second signal cable, and the grounding area of the radiating module is electrically connected to the grounding area of the power feed PCB. The radiating element is applied to an antenna.