Search query: Yagi plasma antenna simulation

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abstract: This paper describes the fabrication and characterization of a reconfigurable Yagi Uda antenna based on a silicon reflector with a solid state plasma. The silicon reflector, composed of serially connected p i n diodes, forms a highly dense solid state plasma by injecting electrons and holes into the intrinsic region. When this plasma silicon reflector is turned on, the front realized gain of the antenna increases by more than 2 dBi beyond 5.3 GHz. To achieve the large gain increment, the structure of the antenna is carefully designed with the aid of semiconductor device simulation and antenna simulation. By using an aluminum nitride (AlN) substrate with high thermal conductivity, self heating effects from the high forward current in the p i n diode are efficiently suppressed. By comparing the antenna simulation data and the measurement data, we estimated the conductivity of the plasma silicon reflector in the on state to be between 104 and 105 S/m. With these figures, silicon material with its technology is an attractive tunable material for a reconfigurable antenna, which has attracted substantial interest from many areas, such as internet of things (IoT) applications, wireless network security, cognitive radio, and mobile and satellite communications as well as from multiple input multiple output (MIMO) systems.
author_names: Da-Jin Kim

Jang-Soon Park

Cheol Ho Kim

Jae Hur

Choong Ki Kim

Young-Kyun Cho

Jun-Bong Ko

Bonghyuk Park

Dongho Kim

Yang-Kyu Choi
title: Reconfigurable Yagi Uda antenna based on a silicon reflector with a solid state plasma
venue: Scientific Reports
year: 2017

abstract: A plasma Yagi antenna was designed based on the traditional theoretical analysis of Yagi antenna, S11 parameters and patterns were simulated by CST software. According to the simulation, we manufacture plasma Yagi antenna principle prototype and S11 parameters are measured by a vector network analyzer, which is consistent with the simulation results. The results show that the plasma Yagi antenna has good directivity and high gain as the plasma density is high enough. The performance can be compared with the metal antenna.
author_names: Zhao Hui-chao

Liu Shao-bin

Li Yu-quan

Yang Huan

Wang Bei-yin
title: Design and research on the plasma Yagi antenna
venue: 2013 Proceedings of the International Symposium on Antennas Propagation
year: 2013

abstract: A silicon based "plasma antenna" has attracted substantial attentions due to the semiconductor's natural ability to reconfigure itself from a metal state to an insulator state, and vice versa. The silicon enables the plasma antenna to operate as a highly practicable and low cost reconfigurable antenna because the external electromagnetic field is coupled with an electron crowded plasma channel. Given these characteristics, it was found that the silicon based plasma channel is capable of becoming a reconfigurable reflector which redirects electromagnetic energy by reflecting an incoming signal back toward its original direction. In this work, the performance of a silicon based reflector mounted on a Yagi Uda antenna is presented. A numerical simulation is carried out to demonstrate the feasibility of the antenna as a plasma channel, prior to its fabrication. The I V characteristics of the fabricated device are consequently shown, and finally the maximum gain along with its beam pattern is demonstrated.
author_names: Jae Hur

Choong Ki Kim

Da-Jin Kim

Tae-Wook Bang

Yang-Kyu Choi

Youngjoo Cho

Kim Cheol-ho

Bonghyuk Park

Park Jang-Soon

Kim Dong-ho
title: Silicon Based Yagi Uda Antenna Reflector
year: 2017

abstract: Abstract A surface wave driven plasma Yagi Uda monopole array composed of several surface wave driven plasma monopole elements is proposed and studied with finite difference time domain simulation in this work. By varying the excitation power of plasma monopoles, a reconfigurable antenna is obtained for different frequencies. Plasma monopoles are fed by RF power at 500 MHz through an unequal power divider with a fixed power division ratio and a surface wave discharge at gas pressure of 0.4 mb. The results show that while the variations of the excitation power shift the Yagi Uda resonant frequency between 0.6 to 1.6 of the initial center frequency, the array gain and directivity remain approximately unchanged in the new resonant frequency. Since efficiency is critical to communication systems, the total efficiencies of the reconfigurable array were analyzed from the least to the highest excitation power. At the least excitation power the efficiency was found to be 58% compared with the 24% efficiency of the highest excitation power.
author_names: Fatemeh Sadeghikia

F Hodjat-Kashani

Jalil Rashed-Mohassel

Abbas Ali Lotfi

J Ghayoomeh-Bozorgi
title: A Yagi Uda Plasma Monopole Array
year: 2012

abstract: The physics of turbulence is a key to understand the plasma confinement. In reversedfield pinch (RFP) turbulence plays an important role to sustain the plasma configuration. However, experimental study of the turbulence is not sufficient especially around the reversed field surface. Microwave imaging reflectometry (MIR) is a powerful technique to measure the two dimensional (2D) density turbulence localized at the cutoff surface directly. For this purpose, the MIR system in 20 GHz with large aperture imaging optics and a 4 x 4 Yagi Uda antenna array has been developed to measure the turbulence around rcut/a 0.7 0.9 in a large RFP device, TPE RX. The MIR signal Ae is detected by the quadrature detectors, with which the amplitude A and IQ signals (cosine and sine components of the phase ph) of the reflection wave can be obtained. In this system, the spatial resolution is 3.7 cm and the temporal resolution is 1ms. Since this is the first MIR system as a turbulence diagnostics, comparison between the simulation and a laboratory test of MIR system has been carried out. A numerical model based on the Huygens Fresnel equation is used to simulate the MIR signal. Main results in this test and simulation are as follows: (1) the phase ph corresponds to the displacement of the cutoff surface in the radial direction; (2) the amplitude A corresponds to the reflection power, which is modulated by the shape of the cutoff surface; (3) the coherence length of the complex IQ signals is longer than that of the amplitude signals; (4) MIR is valid with the condition 4kdL/D 1 to measure the motion of the cutoff surface. Here L, D, k and d denote distance between cutoff and lens, diameter of the lens, perpendicular wavenumber and radial displacement of the cutoff, respectively. The fluctuations measured in TPE RX mainly distribute in the range of 4kdL/D 0.8 which suggests present MIR system can make a clear image of the cutoff surface in plasma. In the RFP plasma, the generalized ohm's law is written as ej| E| u x B where denotes parallel to the magnetic field (it is poloidal at the reversal surface) In the standard plasma, the poloidal current is driven by the electromotive forces u x B >p, which is produced by the fluctuations in the plasma (dynamo action) In the pulsed poloidal current drive (PPCD) plasma, the additional external field in the poloidal direction is generated and the poloidal current can be directly driven by this external electric field. As a result, the fluctuations may be suppressed with PPCD. In this work, the developed turbulence techniques are as follows: (1) the cross correlation, (2) the wavelet, (3) the maximum entropy method (MEM) (4) the fluctuation
author_names: Zhongbing Shi
title: Study of turbulence in a reversed field pinch plasma by microwave imaging reflectometry
year: 2009

abstract: A Yagi plasma antenna model was established by HFSS according to the relationship between plasma dielectric constant and electron density. The patterns were simulated by changing plasma parameters and the number of director dipoles. Results show that when the passive vibrators were switched off, the antenna is omnidirectional antenna. The directionality increases with the increase of the number of passive dipole and the main lobe of which narrows down. Then the plasma Yagi antenna model is established by plasma tube, the gain changed by changing the number of passive dipoles, so the plasma Yagi antenna has a very good reconfigurability. Results prove that the feasibility of the plasma Yagi antenna can be used on AIS base station of Ships' Routeing waters. It can promote the communication and capability of maritime supervision in Ships' Routeing waters. http:/www.transnav.eu the International Journal on Marine Navigation and Safety of Sea Transportation Volume 14
author_names: Yang Sun

Yuli Chen

Fancun Kong

Fei Zhan

Jiansen Zhao
title: Research on Radiation Characteristics of Plasma Yagi Antenna Based on AIS base station in Ships' Routeing Waters
year: 2020

abstract: In order to reduce the operating cost and improve the benefits of communication system, it is a feasible scheme to reduce the number of antennas used while ensuring the communication quality. Because reconfigurable antenna has the characteristic of automatically changing a certain electrical characteristic parameter, it has become one of the hotspots in antenna research. In the design of this paper, reconfigurable antenna is realized by changing the working state of PIN diodes embedded in external feed matching network. The design of Yagi antenna is introduced below.
author_names: Lili Zhao

Pengpeng Yu

Xinsheng Zhou

Qicai Dong

Ziru Wang

Haiyan Li

Li-na Su
title: Simulation Design of Reconfigurable Multifrequency Yagi Antenna
year: 2020

abstract: Abstract An electronically controlled plasma reflector antenna array is presented in term of Yagi antenna technology and plasma theory in this paper. The array comprised of a plasma symmetrical dipole in the center and 6 plasma column antennas uniformly around the dipole. When only the active plasma dipole and one of passive columns are energized, they perform like conductive metals capable to radiate radio signal like a two element plasma Yagi antenna. Pattern reconfigurability of the antenna array can be achieved by sequentially exciting one of 6 plasma columns, and the plasma antenna array also produces better gain through increasing the number of plasma reflectors. Due to the adoption of equal amplitude and phase feeding technology, it greatly reduces the technical difficulty of the implementation of pattern reconfigurability. On the other hand, if all of plasma columns are off, there is only minor reflection from dielectric tubes, and hence, the plasma antenna array has stealth performance.
author_names: Bo Yin

Zu-Fan Zhang
title: A novel reconfigurable radiating plasma antenna array based on Yagi antenna technology
year: 2018

abstract: In this paper, the design and implementation of a plasma antenna array using Yagi Uda reflectors with beamforming is discussed. The structure consists of the circular array of plasma tubes enclosed a unipolar L band monopole antenna. Beamforming is possible using stimulated plasma tubes. The combination of the above structure with plasma excitation controller provides smart beamforming and uses of the Yagi Uda structure increases gain compared to previous models. An experimental model in the L band is fabricated that shows a good agreement between simulated and measured results.
author_names: Fatemeh Sadat Mohseni Armaki

Seyyed Hossein Mohseni Armaki
title: Design and Fabrication of Plasma Yagi Uda Array Antenna With Beamforming
venue: IEEE Transactions on Plasma Science
year: 2019

abstract: In this paper, a pattern reconfigurable Yagi Uda antenna based on bistable structural materials is designed. The antenna comprises a director, a driven dipole, a reflector and a substrate. By applying composite laminates as the substrate that holds two stable configurations with opposite curvations, the pattern reconfiguration performance can be realized, where the direction of maximum radiation differs between two states by 114deg. This antenna operates at 2.4 GHz with a relative bandwidth of 10% a gain of 7.49 dB and a front to back ratio of 8.2 dB. This design can be applied to aircraft control systems.
author_names: Yuwei Zhang

Zhuang Chen

Shu Lin

Jing-xuan Cui

Jian-lin Jiao

Hong-jun Zhang

Alexander Denisov
title: Simulation Design of Pattern Reconfigurable Yagi Uda Antenna Using Bistable Composite Laminates
venue: 2019 International Symposium on Antennas and Propagation (ISAP)
year: 2019