Abstract: Testing apparatuses, and methods for using such apparatuses to calibrate and test an antenna, include a chamber that includes a lining, the lining being made from a material that is absorptive to radiation at a test wavelength. An adjustable platform is positioned at a first side of the chamber, the adjustable platform being rotatable to change an orientation of a device under test. A probe is positioned at a second side of the chamber, opposite to the first side of the chamber, that measures electromagnetic radiation from the device under test. A vector network analyzer communicates with the device under test and the probe to determine calibration information for the device under test.

Abstract: Testing apparatuses, and methods for using such apparatuses to calibrate and test an antenna, include a chamber that includes a lining, the lining being made from a material that is absorptive to radiation at a test wavelength. An adjustable platform is positioned at a first side of the chamber, the adjustable platform being rotatable to change an orientation of a device under test. A probe is positioned at a second side of the chamber, opposite to the first side of the chamber, that measures electromagnetic radiation from the device under test. A vector network analyzer communicates with the device under test and the probe to determine calibration information for the device under test.

Abstract: A light emitting diode (LED) covered with a reflective layer by imprinting process is provided. The imprinting process includes coating a plastic layer on a mold to form an imprinting substrate; coating a reflective layer on the plastic layer and modifying the shape of the reflective layer to fit the shape of outer surfaces of the light emitting diode; softening the plastic layer and impressing the mold covered with the reflective layer upon the LED structure so that the reflective layer adheres to the surfaces of LED; and removing the mold. Because the reflective layer has high reflectivity, the light emitted from the top surface and side surfaces of LED is reflected back to the light extraction direction, and thereby the light extraction efficiency is enhanced.

Abstract: A light emitting diode (LED) covered with a reflective layer by imprinting process is provided. The imprinting process includes coating a plastic layer on a mold to form an imprinting substrate; coating a reflective layer on the plastic layer and modifying the shape of the reflective layer to fit the shape of outer surfaces of the light emitting diode; softening the plastic layer and impressing the mold covered with the reflective layer upon the LED structure so that the reflective layer adheres to the surfaces of LED; and removing the mold. Because the reflective layer has high reflectivity, the light emitted from the top surface and side surfaces of LED is reflected back to the light extraction direction, and thereby the light extraction efficiency is enhanced.