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Aiming at the problems that single-tone excitation sources in antenna pattern testing have difficulty in accurately evaluating the broadband performance of circularly polarized antennas in non-terrestrial networks（NTN），as well as its low efficiency，a broadband excitation source pattern measurement method based on the 5G new radio（NR）demodulation reference signals（demodulation reference signal，DMRS）is proposed.By leveraging the orthogonality of DMRS signals across different ports in the 5G NR service channel，optimal orthogonal DMRS reference signals and excitation signals are designed，enabling high-precision measurement of amplitude and phase across various antenna pointing angles.The antenna radiation pattern is then synthesized with the orthogonal linearly polarized components.Experimental results demonstrate that the proposed method is well-suited for evaluating the broadband performance of circularly polarized antennas in NTN systems，while significantly improves the testing efficiency.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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