| Smart antenna for TD-SCDMA system was investigated in this paper. Based on half-wave dipole, the antennas which involved from primarily dual-polarized dipole element to finally 4×10 intelligent array were simulated, debugged and measured. The author's main work can be summarized in the following aspects:(1) According to the regulations of TD-SCDMA for base-station antenna, a dual-polarized dipole is proposed in this paper. Through analyzing some of the electrical characteristics, the finally size is confirmed. From the test data of dipole, it is showed that the dipole can well satisfy radiation characteristics of the standard requirements.(2) According to the regulations of TD-SCDMA for base-station antenna array, one array, set by 10 units, is tested to educe the radiation patterns combining with phase and magnitude. The length of cable is adjusted to make the value of practical testing phase matched with the theoretical one. It can be seen from the test data of S-parameters and radiation patterns obtained by the connection of feed network with array that the antenna array element can meet the requirements.(3) According to the standards of TD-SCDMA for the requirements of electrical performance of smart antenna array, the array expands to 4×10 array and the S-parameter of eight ports, radiation patterns and synthetic beams (including broadcast beam, 0 degree and 55 degree service beams) are tested and adjusted respectively. From the analysis of the test data, the conclusion that this smart antenna array can better satisfy requirements of TD-SCDMA smart antenna array device specification can be drawn. |
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