This study introduces a new design of planar antenna array for ISM band applications at 2.4 GHz. This prototype is switched beam antenna, namely planar antenna with four meandered slotted triangular elements (PAFMSTE)...This study introduces a new design of planar antenna array for ISM band applications at 2.4 GHz. This prototype is switched beam antenna, namely planar antenna with four meandered slotted triangular elements (PAFMSTE), which is proposed for wireless indoor applications. The Base Station (BS) equipped with this planar antenna is preferred to be at the center position on the room ceiling to cover all sectors of the room. It is designed to use four directional triangular elements arranged to form a square planar antenna array. The PAFMSTE is used to obtain optimal directivity in four directions in azimuth plane with 3 dB beamwidth of 90°at a specific orientation of 30°in elevation plane. Switched parasitic technique is used to enable PAFMSTE to steer a directional beam through four locations by using four PIN diodes switches. The High Frequency Structure Simulator (HFSS) is used as an efficient simulation tool to optimize the performance of the PAFMSTE antenna. The fabrication and measurements of the PAFMSTE antenna are introduced. The proposed antenna enable radio positioning via Angle of Arrival (AOA) information collected from nearby devices. Then, the Cramér-Rao Bound (CRB) is presented for AOA estimation using identically and equally spaced antenna elements. The CRB depends on the directivity, where the maximum values of CRB are 1.35 × 10<sup>-3</sup> and 8 × 10<sup>-3</sup> at HPBW of 60° and 90°, respectively.展开更多
A broadband monolithic linear single pole, eight throw （SP8T） switch has been fabricated in 180 nm thin film silicon-on-insulator （SOI） CMOS technology with a quad-band GSM harmonic filter in integrated passive de...A broadband monolithic linear single pole, eight throw （SP8T） switch has been fabricated in 180 nm thin film silicon-on-insulator （SOI） CMOS technology with a quad-band GSM harmonic filter in integrated passive devices （IPD） technology, which is developed for cellular applications. The antenna switch module （ASM） features 1.2 dB insertion loss with filter on 2G bands and 0.4 dB insertion loss in 3G bands, less than -45 dB isolation and maximum -103 dB intermodulation distortion for mobile front ends by applying distributed architecture and adaptive supply voltage generator.展开更多
This paper studies a multiple input multiple output （MIMO） simultaneous wireless information and power transfer （SWIPT） relay system, in which the source node （SN） send information and energy simultaneously to t...This paper studies a multiple input multiple output （MIMO） simultaneous wireless information and power transfer （SWIPT） relay system, in which the source node （SN） send information and energy simultaneously to the relay node （RN）, and the RN forward the received signal to the destination node （DN） powered by harvested energy. In particular, we consider two SWIPT receiver designs, namely power splitting （PS） and antenna switching （AS） in the relay system. For each design, iterative algorithms based on convex optimization technique are proposed to maximize the system rate. Furthermore, in order to strike a balance between computational complexity and system performance, based on the AS scheme, we propose a low complexity optimization method for PS scheme where a suboptimal PS ratio is given. Numerical results are provided to evaluate the performance of the proposed algorithm for MIMO SWIPT relay systems. It is shown that the performance of the proposed suboptimal method approaches that of the optimal PS scheme.展开更多
文摘This study introduces a new design of planar antenna array for ISM band applications at 2.4 GHz. This prototype is switched beam antenna, namely planar antenna with four meandered slotted triangular elements (PAFMSTE), which is proposed for wireless indoor applications. The Base Station (BS) equipped with this planar antenna is preferred to be at the center position on the room ceiling to cover all sectors of the room. It is designed to use four directional triangular elements arranged to form a square planar antenna array. The PAFMSTE is used to obtain optimal directivity in four directions in azimuth plane with 3 dB beamwidth of 90°at a specific orientation of 30°in elevation plane. Switched parasitic technique is used to enable PAFMSTE to steer a directional beam through four locations by using four PIN diodes switches. The High Frequency Structure Simulator (HFSS) is used as an efficient simulation tool to optimize the performance of the PAFMSTE antenna. The fabrication and measurements of the PAFMSTE antenna are introduced. The proposed antenna enable radio positioning via Angle of Arrival (AOA) information collected from nearby devices. Then, the Cramér-Rao Bound (CRB) is presented for AOA estimation using identically and equally spaced antenna elements. The CRB depends on the directivity, where the maximum values of CRB are 1.35 × 10<sup>-3</sup> and 8 × 10<sup>-3</sup> at HPBW of 60° and 90°, respectively.
文摘A broadband monolithic linear single pole, eight throw （SP8T） switch has been fabricated in 180 nm thin film silicon-on-insulator （SOI） CMOS technology with a quad-band GSM harmonic filter in integrated passive devices （IPD） technology, which is developed for cellular applications. The antenna switch module （ASM） features 1.2 dB insertion loss with filter on 2G bands and 0.4 dB insertion loss in 3G bands, less than -45 dB isolation and maximum -103 dB intermodulation distortion for mobile front ends by applying distributed architecture and adaptive supply voltage generator.
基金supported by the National Natural Science Foundation of China(61461029,61362009,61561032)the Natural Science Foundation of Jiangxi Province(20114ACE00200,20153BCB23020,20162BCB23010,20161BAB202043)the China Postdoctoral Science Foundation Funded Project(2014MT561879,2015T80692)
文摘This paper studies a multiple input multiple output （MIMO） simultaneous wireless information and power transfer （SWIPT） relay system, in which the source node （SN） send information and energy simultaneously to the relay node （RN）, and the RN forward the received signal to the destination node （DN） powered by harvested energy. In particular, we consider two SWIPT receiver designs, namely power splitting （PS） and antenna switching （AS） in the relay system. For each design, iterative algorithms based on convex optimization technique are proposed to maximize the system rate. Furthermore, in order to strike a balance between computational complexity and system performance, based on the AS scheme, we propose a low complexity optimization method for PS scheme where a suboptimal PS ratio is given. Numerical results are provided to evaluate the performance of the proposed algorithm for MIMO SWIPT relay systems. It is shown that the performance of the proposed suboptimal method approaches that of the optimal PS scheme.
