Parasitic patch antennas for omni-directional radiation application

Liu, Minggang; Wang, Jian; Feng, Zhenghe

doi:10.1109/aps.2007.4396087

Cited by 2 publications

References 7 publications

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Low‐cost intelligent antenna with low profile and broad bandwidth

Liu

Gao

Loh

et al. 2013

IET Microwaves, Antennas & Propagation

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In this study, a low‐cost intelligent antenna, which has a low profile, high gain and broad bandwidth, is presented. The proposed antenna is an extension of the conventional electronically steerable parasitic array radiator antenna. It consists of one short monopole and 12‐folded monopoles. The short monopole is placed in the centre and serves as the driven element and the 12‐folded monopoles serve as parasitic elements. The coupling between the driven and parasitic elements provides capacitive loading to the driven element, leading to a low‐profile antenna. The use of 12 PIN diodes enables beamforming to be performed using a transistor–transistor logic supply. The front‐to‐back‐ratio (FBR) is improved by introducing a reconfigurable choke ring surrounding the antenna. To validate the concept, a prototype at S band is developed. Both measured and simulated results are presented. The antenna has a height of only 24 mm (0.16 λ at 2.0 GHz) and a broadband bandwidth from 2.0 to 2.5 GHz. Finally, the antenna is employed in a wireless communication system in a multi‐path environment and large noise environment. It is shown that the antenna can boost the throughput of a wireless system significantly in both environments.

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Low‐cost intelligent antenna with low profile and broad bandwidth

Liu

Gao

Loh

et al. 2013

IET Microwaves, Antennas & Propagation

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Simulation of the dynamic characteristics for a hard disk drive during load/unload process subject to an external shock

Wei

Jiang

2010

2010 3rd International Symposium on Systems and Control in Aeronautics and Astronautics

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The dynamics of the head/disk interface and the lift-tab ramp interface of hard disk drive subject to an external shock during load/unload process were modeled and simulated. The effects of the shock duration and amplitude of shock impulse on the dynamic and contact characteristics of related interfaces were analyzed. The results show that the effects of the shock on contact force and displacement response of dual sliders are different. The influence of the impact on the upper slider is greater than the lower one. These results are beneficial to the improvement of the head/disk interface and further application of the load/unload technology. Manuscript

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Parasitic patch antennas for omni-directional radiation application

Cited by 2 publications

References 7 publications

Low‐cost intelligent antenna with low profile and broad bandwidth

Low‐cost intelligent antenna with low profile and broad bandwidth

Simulation of the dynamic characteristics for a hard disk drive during load/unload process subject to an external shock

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