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The sum and difference channels of Kaband dual channel telemetry equipment have phase differences, which can vary with environmental changes. Phase correction is required at the baseband terminal to achieve phase difference correction and ultimately achieve autonomous tracking of the target. In the shooting range, baseband phase calibration was usually achieved by setting up calibration rods, which can achieve the purpose of phase calibration. However, with the expansion of telemetry equipment in the field of combat, it has expanded to areas such as deep sea and plateau. Due to the various limitations of these special location environments on setting up calibration rods, this article focuses on studying how to achieve the purpose of calibrating the phase zero value of the differential channel, without setting up calibration rods, transmit signals through biased antennas in plateau environments. This article presents the principle and method of rodless calibration based on biased antennas, and verifies the effectiveness of the proposed method through experiments.
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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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