340-GHz thin-film type transmission polarized converter
A polarization conversion and thin-film technology, which is applied in the field of radar and communication, can solve the problems of poor performance of polarization converter devices, unsatisfactory phase modulation characteristics, and large transmission loss of polarization converters, so as to avoid the loss of substrate materials. Selection problem, avoiding the processing accuracy problem of simple metal grid, and the effect of simple structure
Inactive Publication Date: 2017-10-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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[0002] With people's research and application in the terahertz field, more and more high-performance terahertz band transmission devices are in demand, but limited by the manufacturing process, the realization of traditional microwave devices in the high frequency band has become very difficult
In recent years, the application of quasi-optical principles to the development of terahertz technology has been extensively studied. Various quasi-optical grating elements have begun to be used in microwave devices, and oscillators, amplifiers, and mixers have been designed using quasi-optical gratings. , phase shifter, frequency multiplier and switch, etc., and the application of the structure of the load converter to realize the regulation of the polarization state of the antenna has been widely used in the low-frequency microwave band, but limited by the design and manufacturing process, the existing polarization The transmission loss of the converter is large, the working frequency band is low, and the phase modulation characteristics are not ideal. In the terahertz band, due to the small wavelength of electromagnetic waves, the size of the periodic unit of the polarization converter is small, and small changes in size can easily cause polarization conversion. Device performance deteriorates
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[0022] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0023] The present invention provides a 340GHz film-type transmissive polarization converter, which is placed inside a 340GHz thin-film device-based broadband duplexer that absorbs the cavity, wherein the duplexer includes: a wave-absorbing cavity 1, a pole A polarization isolator 2 and a polarization converter 3; the absorbing cavity 1 is a cylindrical cavity with a T-shaped external shape, which is a hollow cavity 1 whose internal shape is consistent with the external shape and runs through each end surface , the polarization isolator 2 is an elliptical metal gasket, and one side of the metal elliptical gasket is provided with a film with a metal wire grating, and the device is placed above the vertical hollow cavity on the suction The intersection of the horizontal and vertical hollow cavities of the wave cavity body 1 is 45 degrees clockwise with the h...
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Abstract
The invention discloses a 340-GHz thin-film type transmission polarized converter, so that the transmission type polarized converter based on a double-layer-array-structure metamaterial is realized. The 340-GHz thin-film type transmission polarized converter is suitable for a frequency band of 340GHz+ / - 15GHz to realize mutual conversion between a linear polarization wave and circular polarized wave. The polarized converter is a circular metal gasket; thin films are pasted at the surfaces of the two sides of the metal gasket; an array formed by periodic metal units is arranged at the outer surface of each thin film; and each periodic metal unit is formed by a rectangular metal piece penetrating the thin film and one row of square metal pieces with one sides arranged uniformly along the length direction of the rectangular metal piece, wherein a gap is formed between the rectangular metal piece and the one row of square metal pieces.
Description
technical field [0001] The invention belongs to the field of radar and communication, and in particular relates to a 340GHz film-type transmissive polarization converter. Background technique [0002] With people's research and application in the terahertz field, more and more high-performance terahertz band transmission devices are in demand, but limited by the manufacturing process, the realization of traditional microwave devices in the high frequency band has become very difficult. In recent years, the application of quasi-optical principles to the development of terahertz technology has been extensively studied. Various quasi-optical grating elements have begun to be used in microwave devices, and oscillators, amplifiers, and mixers have been designed using quasi-optical gratings. , phase shifter, frequency multiplier and switch, etc., and the application of the structure of the load converter to realize the regulation of the polarization state of the antenna has been w...
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Inventor 王学田张盟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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