Calibration network for td smart antenna
A smart antenna and network technology, applied in the field of calibration network, can solve the problems of small coupling signal strength of directional coupler, high signal strength of calibration port, poor anti-interference ability, etc., and achieve the effect of shielding external signal interference
Active Publication Date: 2016-08-17
MOBI TECH SHENZHEN CO LTD +3
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Problems solved by technology
[0003] The current smart antenna calibration network is mostly open, with a relatively simple structure and simple installation, but it has disadvantages such as poor anti-interference ability and large space occupation. The closed calibration network has strong anti-interference ability and free arrangement. characteristics, and the scope of use is becoming wider and wider, but because the directional coupler coupling signal strength of the calibration network is small, the signal strength of the calibration port is relatively large, and the crosstalk between the radiation signal of the calibration port and the signals of each channel is relatively obvious, resulting in calibration The network amplitude and phase consistency deteriorates rapidly, and it is difficult to debug
[0004]
In summary, there are obviously inconveniences and defects in the actual use of the existing technology, so it is necessary to improve
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[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0021] As the early version and evolved version of the TDD mobile communication system, TD-SCDMA and TD-LTE will coexist for a long time, which also involves the co-site built-in combiner antenna of the TDD system itself. In order to improve the amplitude and phase linearity of the calibration network in the TD-SCDMA and TD-LTE frequency bands, solve the disadvantages of the closed quasi-network, and ensure that the smart antenna meets the higher requirements of smart antenna miniaturization and calibration accuracy, the present invention provides solution.
[0022] The calibration network of a TD...
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The invention is applicable in the technical field of communication, and provides a calibration network of TD intelligent antenna, which comprises a metal fixed plate and a calibration network circuit board fixed on the metal fixed plate, wherein the calibration network circuit board is connected with a equant Wilkinson splitter, the end of the equant Wilkinson splitter is connected with a plurality of microstrip directional couplers to couple signal from each intelligent antenna channel, the external of the microstrip directional coupler is provided with a metal shield box, the metal fixed plate is provided with a metal cover, and a metal cavity containing the metal shield box and the calibration network circuit board is formed between the metal cover and the metal fixed plate The calibration network of TD intelligent antenna through the calibration network is closed, so as to shield external signal interference.
Description
technical field [0001] The invention relates to the technical field of communication, in particular to a calibration network of a TD smart antenna. Background technique [0002] In recent years, with the continuous development of mobile communication technology, the number of users has also shown a trend of rapid growth. China Mobile has comprehensively carried out the construction of TD-LTE base stations this year, and China Unicom and China Telecom are currently conducting TD-LTE research and testing, which means With the emergence of a huge number of TD-LTE base stations in the future, site resources will become more and more tense. In order to save the resulting human and material costs, TD-SCDMA and TD-LTE common antenna products will become more and more At the same time, the miniaturization of antennas has become an inevitable trend. As a component of the TD smart antenna, the calibration network plays a key role in the communication between the system equipment and ...
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IPC IPC(8): H04B17/12H04B17/21H04B1/525
Inventor 刘维卓王威徐存伟迟春雷李渭民
Owner MOBI TECH SHENZHEN CO LTD