A Method of Calculating the Rotational Offset of Electric Field Probe Using the Axial Ratio Pattern of Circularly Polarized Antenna
A circularly polarized antenna and pattern technology, which is applied to the antenna radiation pattern, the use of electrical devices, the use of electromagnetic means, etc., can solve the problem of heavy workload, does not have the ability to automatically compensate the ⊿x and ⊿y offsets of circularly polarized antennas, The electric field probe cannot realize the problem of rotation, etc., to achieve the effect of reducing workload and small rotation angle
Inactive Publication Date: 2016-03-02
NAT SPACE SCI CENT CAS
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0008] This method can obtain the precise values of ⊿x and ⊿y offsets without installing heavy optical measurement equipment, but the main problems are as follows: 1) It needs to complete four near-field measurement tasks, and the workload is huge; 2) Partial The electric field probe cannot be rotated within 360°; 3) It does not have the ability to automatically compensate for the offset of circularly polarized antennas ⊿x and ⊿y
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0069] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, and realized through the following technical solutions.
[0070] In order to describe in detail the method for calculating the rotation offset of the electric field probe using the axial ratio pattern of the circularly polarized antenna of the present invention, first,
[0071] According to Kerns' plane wave coupling matrix theory, the relationship between the probe response and the spectral function of the antenna under test is obtained:
[0072] b 0 ′ ( x , y , d ) = a 0 F ′ ∫ ∫ t 10 ‾ ( K ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method for calculating electric field probe rotation offset through a circular polarization antenna axial ratio directional diagram. According to the method, the nonlinearity least square method is used for guiding out a mathematic model of the relation between the offset after electric field probe rotation and the circular polarization antenna axial ratio directional diagram, the Gauss-Newton iterative method is used for carrying out numerical solution on the offset after electric field probe rotation to obtain electric field probe rotation offset delta x and delta y for compensation for near-far field conversion, and therefore an accurate circular polarization antenna far field directional diagram and the accurate axial ratio directional diagram are obtained. According to the method, the accurate value of the delta x and the delta y of electric field probe rotation offset can be obtained without arranging heavy optical measurement equipment in an erecting mode, only two times of plane near field measurement is needed, and the workload is reduced. An electric field probe used for measurement just needs to be rotated by 90 degrees instead of being rotated by 360 degrees, and electric field probe rotation offset can be automatically compensated.
Description
technical field [0001] The invention relates to the technical field of antenna near-field measurement, in particular to a method for calculating the rotation offset of an electric field probe by using the axial ratio pattern of a circularly polarized antenna. Background technique [0002] Antenna near-field measurement technology is a high-precision antenna measurement and diagnosis technology widely used at home and abroad. The near-field of the antenna is usually divided into a near-field induction area and a near-field radiation area. The near-field induction area is also called the reactance near area and the energy storage area. The far-field pattern of the antenna can be calculated. When the area away from the antenna to be tested is 3 wavelengths away from the near-field radiation area, the influence of the induced near-field on the antenna measurement can be ignored at this time. In the near-field radiation area, the electric field, magnetic field, and propagation ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/14G01R29/10
Inventor 易敏王宏建刘广陈雪赵鑫
Owner NAT SPACE SCI CENT CAS