英国工程技术学会
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作者:Beyit Barakali , Kenneth Lee Ford , Salam Khamas
来源:[J].IET Microwaves, Antennas & Propagation, 2018, Vol.12 (10), pp.1679-1683IET
摘要:A beam reconfigurable antenna with high gain is presented with low complexity switching capability. The design consists of a printed dipole antenna with reconfigurable parasitic elements that are combined with a partially reflecting surface to provide main lobe radiation pattern ...
作者:Giovanni Buonanno , Raffaele Solimene
来源:[J].IET Microwaves, Antennas & Propagation, 2018, Vol.12 (10), pp.1671-1678IET
摘要:Linear random antenna arrays are usually studied in conjunction with uniform excitations with, at most, a linear phase shift in order to steer the main beam. This offers some advantages in terms of the feeding network but puts limitations on the array factor that can be obtained....
作者:Francisco das Chagas Barbosa de Sena , José Patrocínio da Silva
来源:[J].IET Microwaves, Antennas & Propagation, 2018, Vol.12 (10), pp.1645-1648IET
摘要:This study analyses the effects caused by a new hexagonal defect ground-plane (DGS) structure when it is applied to a rectangular microstrip antenna and studies its effectiveness to suppress higher-order modes. To improve the rejection characteristics of the analysed DGS, a genet...
作者:Wahab Khawaja , Ismail Guvenc , Arindam Chowdhury
来源:[J].IET Microwaves, Antennas & Propagation, 2018, Vol.12 (10), pp.1691-1699IET
摘要:Maintaining communications during major hurricanes is critically important for public safety operations by first responders. This requires accurate knowledge of the propagation channel during hurricane conditions. In this work, the authors have carried out ultra-wideband (UWB) ch...
作者:Timothy D. Drysdale , Ben Allen , Chris Stevens ...
来源:[J].IET Microwaves, Antennas & Propagation, 2018, Vol.12 (10), pp.1625-1632IET
摘要:This study focuses on the application of orbital angular momentum (OAM) modes for enhancing radio communications. It is shown that OAM modes can enhance the spectral efficiency of line-of-sight links where there is limited or no diversity gain, and also increase physical layer se...
作者:Ali Ramezani Varkani , Zaker Hossein Firouzeh , Abolghasem Zeidaabadi Nezhad
来源:[J].IET Microwaves, Antennas & Propagation, 2018, Vol.12 (10), pp.1684-1690IET
摘要:This study aims to present a thin and broadband meta-surface for both mono-static and bi-static radar cross-section (RCS) reduction being able to operate in large range of incident angles and different polarisations. Meta-surfaces are formed through the combination of two ar...
作者:Sara Salem Hesari , Jens Bornemann
来源:[J].IET Microwaves, Antennas & Propagation, 2018, Vol.12 (10), pp.1620-1624IET
摘要:A K-band frequency-selective front-end system for monopulse tracking applications is presented on a single layer of a substrate-integrated waveguide (SIW). The circuit comprises an antenna array of two Vivaldi antennas, a frequency-selective power combiner, and two frequency...
作者:Jinli Zhang , Ming He , Haihua Chen ...
来源:[J].IET Microwaves, Antennas & Propagation, 2018, Vol.12 (10), pp.1656-1665IET
摘要:A novel scheme of a multi-mode square ring resonator (MMSRR) is proposed in this study. To analyse the characteristics of the proposed resonator, the odd- and even-mode based method is used, which shows that the basic type of resonator has five resonant modes and three transmissi...
作者:Chiranjib Goswami , Rowdra Ghatak , Dipak R. Poddar
来源:[J].IET Microwaves, Antennas & Propagation, 2018, Vol.12 (10), pp.1719-1727IET
摘要:Here, a simple yet effective design methodology to design multi-band planar antenna is proposed. The monopole antenna structure is realised using a bisected fractal Hilbert curve. Two subwavelength split-ring resonators (SRRs), where one is a Moore shaped fractal SRR, operat...
作者:Zhen Meng , Feng Shen , Weidong Zhou
来源:[J].IET Microwaves, Antennas & Propagation, 2018, Vol.12 (10), pp.1704-1708IET
摘要:It is well known that adaptive beamforming methods are susceptible to performance losses in the presence of model mismatches, especially when the training sample is contaminated by the desired signal. Here, in order to thoroughly remove the desired signal from the sample covarian...

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