Method, system and calibration target for the automatic calibration of an imaging antenna array
First Claim
1. A method for automatic calibration of an imaging antenna array using an evaluation device and a calibration object, wherein the calibration object includes at least one diffuse reflector, and wherein position coordinates of the calibration object are entered, the method comprising:
- transmitting, by the imaging antenna array, signals;
receiving the signals reflected from the calibration object;
calculating expected reflections of the calibration object;
calculating calibration data;
preparing an image of the calibration object based on the calibration data;
determining corrected position coordinates by evaluating a portion of the image, which corresponds to the at least one diffuse reflector; and
iterating the calculating, preparing, and determining steps with the corrected position coordinates.
1 Assignment
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Accused Products
Abstract
The system (1) is used for the automatic calibration of an imaging-antenna arrangement (2) using an evaluation unit (4). The antenna arrangement (2) transmits signals (6) and receives the signals (6′) reflected from a calibration object (3) of known shape. The calibration object (3, 31, 32) provides at least one diffuse reflector (8). In the evaluation method, position coordinates of the calibration object (3) are entered, and the following method steps are implemented after the measurement of the reflected signals (6′):
- i. Calculation of the reflections of the calibration object (3, 31, 32),
- ii. Calculation of calibration data,
- iii. Preparation of an image of the calibration object with the use of the calibration data,
- iv. Determination of corrected position coordinates by evaluating the image of the at least one diffuse reflector,
- v. Implementation of steps i. to iv. with corrected position coordinates.
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Citations
20 Claims
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1. A method for automatic calibration of an imaging antenna array using an evaluation device and a calibration object, wherein the calibration object includes at least one diffuse reflector, and wherein position coordinates of the calibration object are entered, the method comprising:
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transmitting, by the imaging antenna array, signals; receiving the signals reflected from the calibration object; calculating expected reflections of the calibration object; calculating calibration data; preparing an image of the calibration object based on the calibration data; determining corrected position coordinates by evaluating a portion of the image, which corresponds to the at least one diffuse reflector; and iterating the calculating, preparing, and determining steps with the corrected position coordinates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for automatic calibration of an imaging antenna array, comprising:
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an evaluation device; and a calibration object including a reflecting surface, which faces towards the imaging antenna array, and at least one diffuse reflector directed towards the imaging antenna array, wherein the imaging antenna array transmits signals and receives the signals reflected from the calibration object, wherein the evaluation device evaluates the received signals, and wherein the at least one diffuse reflector reflects in a diffuse manner signals which strike the at least one diffuse reflector. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A calibration object for automatic calibration of an imaging antenna array with a reflecting surface, comprising:
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at least one diffuse reflector directed towards the imaging antenna array on and/or near the reflecting surface, the at least one diffuse reflector reflecting in a diffuse manner signals which strike the at least one diffuse reflector, wherein the at least one diffuse reflector is a needle-shaped, metallic or metallised pin and provides a tip of which a spatial extension is in a same order of magnitude as a wavelength of the signals, or the at least one diffuse reflector is a recess, and wherein the at least one diffuse reflector is made from a material with a diffuse reflecting surface and provides a round or cruciform contour. - View Dependent Claims (20)
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Specification