研究目的
To design and realize a low cost and compact dual-port circular polarized patch antenna with a low level of cross polarization suitable for GNSS-R applications.
研究成果
A dual circular polarized stacked patch antenna was designed for GNSS-R applications, featuring a low level of cross-polarization, low cost, and lightweight, making it useful for portable GNSS-R applications.
研究不足
The radiated efficiency of the prototype is not very high due to the presence of two layers of FR4 and one of the antennas being sandwiched between the two substrates.
1：Experimental Design and Method Selection:
The study involved in-situ measurements using a commercial dual circular polarized antenna and the design of a new dual-polarized antenna.
2：Sample Selection and Data Sources:
The soil in Grugliasco, Italy, was used for measurements.
3：List of Experimental Equipment and Materials:
A commercial antenna by Antcom and a custom-designed microstrip patch antenna on FR4 were used.
4：Experimental Procedures and Operational Workflow:
The reflected signal was processed with an open-loop approach to obtain Delay Doppler Maps (DDMs) and Delay Waveforms. The Signal-to-Noise Ratio (SNR) was obtained from the received power.
5：Data Analysis Methods:
The dielectric constant was evaluated from the LH reflected signal and compared with local measurements using a TDR system.
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