研究目的
To design compact multi-band antennas for low power communication standards (LoRa, GPS, BLE) to enhance positioning accuracy in both outdoor and indoor scenarios using diversity techniques.
研究成果
The proposed compact multi-band antennas successfully cover LoRa, GPS, and BLE frequency bands with high radiation efficiency, enabling low-power consumption for tracking devices. The use of diversity techniques improves positioning accuracy for both indoor and outdoor applications.
研究不足
The study is based on simulations only; no physical fabrication or experimental validation is mentioned. The antennas are designed for specific frequency bands and may have constraints in real-world applications due to environmental factors.
1：Experimental Design and Method Selection:
The antennas are designed based on Planar Inverted-F Antenna (PIFA) structure with parasitic effects to achieve multi-band characteristics. Simulation and optimization are performed using HFSS software.
2：Sample Selection and Data Sources:
Antennas are printed on a
3：8-mm thick FR4 substrate with permittivity of 4 and loss tangent of List of Experimental Equipment and Materials:
FR4 PCB, HFSS software for simulation.
4：Experimental Procedures and Operational Workflow:
Design two antennas with specific dimensions (Antenna 1: 13mm x 25mm, Antenna 2: 5mm x 25mm), optimize variables (v and d) for frequency bands, simulate return loss and current distributions.
5：Data Analysis Methods:
Analyze simulated S-parameters and current distributions to ensure return loss ≤ -6 dB for required bandwidths.
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