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In this paper, a wideband circularly-polarized patch antenna is presented. The patch is fed by four probes arranged by sequential rotation arrays, the four probes are connected to a feed network comprising of a pair of broadband 90° phase shifter and Wilkinson power divider. The proposed antenna shows a compact low profile, wide axial-ratio (AR) bandwidth, wide reflection coefficient bandwidth, as...
LTE-Advanced technology is required to support 100MHz channel bandwidth and transfer rates in excess of 1Gbps. The 2.6GHz band is one of the core band of LTE-Advanced technology. This paper provide the detailed design of the RF front-end. The receiver uses the traditional double-conversion superheterodyne structure, while transmitter uses a zero-IF structure, able to obtain high receiver sensitivity...
In this paper, the development of an RF transmitter for mobile communication systems with high data rates and large spectrum efficiency in microwave frequency band is presented. The RF transmitter operates in the 6GHz frequency band with 500MHz signal width. The transmitter has good performance as excellent linearity, high dynamic range, low EVM, and good flatness. The transmitter has a wide channel...
Implementation of a wideband RF receiver for the 6??6 MIMO (Multiple-Input Multiple-Output) TDD (Time Division Duplex) wireless communication system is reported in this paper. In order to achieve the best performance, a superheterodyne architecture with RF of 3.45GHz and IF of 1.15GHz is employed, and the signal bandwidth is 100MHz. System simulation results and design considerations are included...
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