研究目的
To develop a miniaturized quadrifilar helical antenna with four independent ports for use in 5G Massive MIMO and other wireless communication systems, achieving reduced size, improved radiation patterns, and wide impedance bandwidth.
研究成果
The miniaturized quadrifilar helical antenna with four ports achieves a 47% height reduction, improved radiation patterns, wide impedance bandwidth, and reduced coupling between ports, making it suitable for 5G Massive MIMO applications and other wireless systems.
研究不足
The paper does not explicitly discuss limitations, but potential areas for optimization could include further reduction in coupling between ports, broader frequency band coverage, and scalability for larger arrays.
1：Experimental Design and Method Selection:
The design involves printing helical traces and additional conductive components (strips or rings) on flexible substrates wrapped around a cylinder to achieve miniaturization and performance improvements. Simulations were conducted using HFSS Ansoft Software based on the Finite Elements method.
2：Sample Selection and Data Sources:
A prototype antenna was constructed using DuPont Pyralux AP flexible substrate with specific dimensions and material properties. Measurements were taken for S-parameters and envelope correlation coefficient.
3：List of Experimental Equipment and Materials:
Flexible substrate (DuPont Pyralux AP, 0.127mm thick, relative permittivity 3.4), solid mandrel for wrapping, simulation software (HFSS Ansoft).
4：127mm thick, relative permittivity 4), solid mandrel for wrapping, simulation software (HFSS Ansoft).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The antenna was designed with helical traces on one surface and conductive strips or rings on the opposite surface. It was wrapped around a cylinder, simulated for performance, and prototyped for measurement of reflection coefficients, mutual coupling, and radiation patterns.
5：Data Analysis Methods:
S-parameters and envelope correlation coefficient were computed from measured data to evaluate impedance bandwidth, isolation, and radiation characteristics.
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