Reflector antenna delay measurement method
An antenna delay and measurement method technology, applied in transmission monitoring, electrical components, transmission systems, etc., can solve the problems of unsuitable measurement methods, large influence of measurement results, and high test costs, and achieve good promotion and application value. , The method is simple and applicable, and the effect of improving the measurement accuracy
Inactive Publication Date: 2011-05-11
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology
[0004] 1. The traditional antenna delay measurement is calibrated together with the system delay zero value, which requires the establishment of a complex far-field test system, and the test cost is expensive
[0005] 2. For the delay measurement of the antenna itself, the traditional measurement method is not suitable for measurement in the laboratory, and the test environment has a great influence on the measurement results
[0006] 3. The traditional reflector antenna time delay measurement cannot realize the measurement of time delay variation with temperature
[0007] 4. The traditional antenna delay measurement method does not give an accurate definition of the reflector antenna delay
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[0058] It is known that the diameter of the reflector antenna is 13 meters, the diameter of the auxiliary surface is 1.3 meters, the half-opening angle of the feed phase center to the auxiliary surface is 16.94°, and the half-opening angle of the edge of the auxiliary surface to the main surface is 79.611°, then by the formula ( 1) The calculated equal optical path distance is:
[0059] d = 130 2 × sin 16.94 + 1300 - 130 2 × sin 79.611 = 817.834 ( cm )
[0060] The time delay of the equal optical path distance calculated by equation (2) is 27.261ns.
[0061] When the frequency is 6075MHz, the transmission waveguide feeder delay measured by the vector network is 95.508ns
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The invention discloses a reflector antenna delay measurement method. Reflector antenna delay consists of feeder delay, feed source network delay and antenna aplanatism delay. The invention provides a vector network analyzer based measurement and calculation combined method for determining the reflector antenna delay; in the method, a vector network analyzer is used for measuring the feeder delay and the feed source network delay and calculating the aplanatism delay, and the feeder delay, the feed source network delay and the aplanatism delay are added to get antenna delay. The method disclosed by the invention is simple and feasible, is not only suitable for the measurement of the reflector antenna delay, but also suitable for the measurement of the characteristic that the delay varies with the change of temperature.
Description
technical field [0001] The invention relates to a method for measuring the time delay of a reflector antenna in a space communication measurement and control system. Background technique [0002] In the space communication system, the reflector antenna is used to transmit electromagnetic waves and receive electromagnetic wave signals. When transmitting, the output power of the transmitter is radiated to the space by the antenna through the output of the transmitting feeder; when receiving, the incident electromagnetic wave energy in the space is converted into RF guided waves. energy is transmitted to the receiver. [0003] In the space communication measurement and control system, ranging is achieved by measuring the time delay, so the measurement of the zero value of the system time delay is very important. The delay of the reflector antenna itself is a component of the zero value of the system delay, so the delay measurement of the reflector antenna is also very importan...
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Inventor 秦顺友杜彪李振生李勇王小强王海陈辉张文静张志华王聚亮
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP