The compact field is used to meet microwave testing requirements such as satellite antenna testing, communication antenna testing, vehicle-mounted radar antenna testing, and target scattering characteristics testing.
Product features:
Frequency range: 0.3-300GHz
Dead zone size: 1m-12m
Product description:
The compressed field can achieve a plane wave environment within a short distance, meeting the test requirements of antenna radiation characteristics, target scattering characteristics, and material transmission and reflection characteristics. The compact field products provided have undergone a large number of simulation optimization, engineering verification and practical application.
The tightening field mainly consists of a high-precision reflecting surface, a temperature-compensated high-temperature back frame, a beam-matched feed and a feed turntable. The high-precision emission surface adopts a sandwich aluminum honeycomb panel. Through a flexible mold negative pressure forming process, the surface accuracy is as high as 30 microns. It has been verified through practical application that it has a service life of more than 20 years.
Design proposal:
According to customer customized design, based on indicators: (1) frequency range;(2) dead zone size;(3) customer site area; single reflecting surface compact field, single cylinder can be usedCompact field, feedforward Cassegrain compact field and dualCylindrical contraction field.
single reflector constricting field
The single-reflector tightening field uses a rotating paraboloid as the reflecting surface to calibrate the spherical wave emitted by the feed placed at the focus to a plane wave. Its geometry is relatively simple. However, its focal length is relatively short, resulting in a large taper of the silent zone amplitude; at the same time, in order to avoid blocking of the feed, a biased feed structure is usually used to make the cross-polarization higher, generally around-25dB to-30dB.
single cylinder surface contraction field
Due to the diffusion effect of cylindrical waves, its advantage is that it has a high orifice utilization factor, which is about 120% to 150%. The lateral size of the dead zone is equivalent to or even larger than the size of the reflecting surface, which is quite favorable for testing large size targets. However, since the dead zone is not a uniform plane wave, the test results need to be corrected to obtain the far field pattern.
feed-forward Cassegrain tightening field
The secondary surface of the feed-forward Cassegren tightening field is a hyperboloid of revolution and the principal surface is a paraboloid of revolution. The secondary surface calibrates the spherical wave emitted by the feed source to the spherical wave emitted by the virtual source, and the primary surface calibrates it to the plane wave. Generally, a feed-forward "4"-shaped structure can be used to obtain a large equivalent focal diameter ratio, which can be 7:1 or even larger, and the spatial attenuation uniformity of the main polarization is greatly improved.
bicylindrical constricting field
The double cylindrical tightening field uses two parabolic cylinders with curved surfaces perpendicular to each other to calibrate the spherical wave emitted by the feed. The secondary surface first calibrates the one-dimensional wavefront to form a cylindrical wave, and the primary surface calibrates the other one-dimensional wavefront to obtain the plane wave dead zone.
Product features:
Frequency range: 0.3-300GHz
Dead zone size: 1m-12m
Product description:
The compressed field can achieve a plane wave environment within a short distance, meeting the test requirements of antenna radiation characteristics, target scattering characteristics, and material transmission and reflection characteristics. The compact field products provided have undergone a large number of simulation optimization, engineering verification and practical application.
The tightening field mainly consists of a high-precision reflecting surface, a temperature-compensated high-temperature back frame, a beam-matched feed and a feed turntable. The high-precision emission surface adopts a sandwich aluminum honeycomb panel. Through a flexible mold negative pressure forming process, the surface accuracy is as high as 30 microns. It has been verified through practical application that it has a service life of more than 20 years.
Design proposal:
According to customer customized design, based on indicators: (1) frequency range;(2) dead zone size;(3) customer site area; single reflecting surface compact field, single cylinder can be usedCompact field, feedforward Cassegrain compact field and dualCylindrical contraction field.
single reflector constricting field
The single-reflector tightening field uses a rotating paraboloid as the reflecting surface to calibrate the spherical wave emitted by the feed placed at the focus to a plane wave. Its geometry is relatively simple. However, its focal length is relatively short, resulting in a large taper of the silent zone amplitude; at the same time, in order to avoid blocking of the feed, a biased feed structure is usually used to make the cross-polarization higher, generally around-25dB to-30dB.
single cylinder surface contraction field
Due to the diffusion effect of cylindrical waves, its advantage is that it has a high orifice utilization factor, which is about 120% to 150%. The lateral size of the dead zone is equivalent to or even larger than the size of the reflecting surface, which is quite favorable for testing large size targets. However, since the dead zone is not a uniform plane wave, the test results need to be corrected to obtain the far field pattern.
feed-forward Cassegrain tightening field
The secondary surface of the feed-forward Cassegren tightening field is a hyperboloid of revolution and the principal surface is a paraboloid of revolution. The secondary surface calibrates the spherical wave emitted by the feed source to the spherical wave emitted by the virtual source, and the primary surface calibrates it to the plane wave. Generally, a feed-forward "4"-shaped structure can be used to obtain a large equivalent focal diameter ratio, which can be 7:1 or even larger, and the spatial attenuation uniformity of the main polarization is greatly improved.
bicylindrical constricting field
The double cylindrical tightening field uses two parabolic cylinders with curved surfaces perpendicular to each other to calibrate the spherical wave emitted by the feed. The secondary surface first calibrates the one-dimensional wavefront to form a cylindrical wave, and the primary surface calibrates the other one-dimensional wavefront to obtain the plane wave dead zone.
2025年4月24日 星期四 8时59分46秒
粤公网安备44030002005678号
