Phased array antenna equivalent isolation degree testing method

Abstract

The invention discloses a plane antenna engineering equivalent testing method and particularly relates to a phased array antenna equivalent isolation degree testing method. The array antenna isolation degree is calculated in the first place, an arbitrary unit array element of a phased array antenna is subsequently chosen as a testing reference point, and then a gain correction coefficient of the array antenna is calculated. The plane antenna engineering equivalent testing method can successfully solve engineering test deviation due to uncertainty of gain of an antenna main lobe and the antenna, wherein the uncertainty of the gain of the antenna main lobe and the antenna is caused by variation of array antenna phase synthesis. By introducing correction factors such as the gain after phase synthesis, an antenna array angle and beam width deviation, the phased array antenna is changed to be an equivalent unit antenna. The phased array antenna equivalent isolation degree testing method is suitable for isolation degree engineering tests between the phased array antenna and a unit antenna and between the array antennas and can be popularized and applied to array antenna isolation degree engineering tests on all sorts of weapon equipment platforms.

Description

technical field [0001] The invention relates to the field of aircraft antenna testing, in particular to an equivalent isolation test method between a phased array antenna and a unit antenna, and between an array antenna and an array antenna. Background technique [0002] Antenna isolation test is mainly used in aircraft antenna layout design, which is very important for the development of special aircraft. In domestic phased array antenna isolation test methods, each unit element of the array antenna is still used as the test object, and it is tested in one-to-one correspondence with other associated unit antennas, and an isolation test based on the characteristics of the research unit antenna object is carried out. Method research has achieved certain results. At present, the antenna isolation test method of the aircraft is based on the energy transmission relationship between the unit antenna airborne transceiver equipment. The disadvantage is that this test method is ba...

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Problems solved by technology

The disadvantage is that this test method is based on the isolation test method between the unit antennas. For phased array antennas, the beam radiation characteristics of the array antenna are mainly realized by phase synthesis, and the array unit antenna can no longer characterize the array antenna. Radiation characteristics, and the array antenna is composed of dozens or even hundreds of unit antennas. The distance and directionality of each unit array are inconsistent. The data obtained through the unit array antenna test cannot accurately reflect the phased array antenna and the unit antenna. The real isolation result between the antenna and the array antenna, the result deviation is too large, which does not meet the actual design situation, and the test cycle of the array subunits is long, and the engineering applicability is poor

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