38-GHz Phased Array Transmitter and Receiver Based on Scalable Phased Array Modules With Endfire Antenna Arrays for 5G MMW Data Links

2021 ◽  
Vol 69 (1) ◽  
pp. 980-999
Author(s):  
Chun-Nien Chen ◽  
Yi-Hsien Lin ◽  
Li-Cheng Hung ◽  
Tzu-Chien Tang ◽  
Wei-Pang Chao ◽  
...  
Keyword(s):  
Antenna Arrays ◽  
Phased Array ◽  
Data Links

A 38-GHz 32-Element Phased-Array Transmitter Based on Scalable 8-Element Phased-Array Modules for 5G MMW Data Links

2020 ◽  
Author(s):  
Chun-Nien Chen ◽  
Li-Cheng Hung ◽  
Yi-Hsien Lin ◽  
Tzu-Chien Tang ◽  
Wei-Pang Chao ◽  
...  
Keyword(s):  
Phased Array ◽  
Data Links

scholarly journals Design of Multilevel Sequential Rotation Feeding Networks Used for Circularly Polarized Microstrip Antenna Arrays

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Aixin Chen ◽  
Chuo Yang ◽  
Zhizhang Chen ◽  
Yanjun Zhang ◽  
Yingyi He
Keyword(s):  
Antenna Arrays ◽  
Microstrip Antenna ◽  
Communication Systems ◽  
Satellite Communication ◽  
Phased Array ◽  
Improve Performance ◽  
Multiple Series ◽  
Circularly Polarized ◽  
Microstrip Antenna Array ◽  
Feeding Techniques

Sequential rotation feeding networks can significantly improve performance of the circularly polarized microstrip antenna array. In this paper, single, double, and multiple series-parallel sequential rotation feeding networks are examined. Compared with conventional parallel feeding structures, these multilevel feeding techniques present reduction of loss, increase of bandwidth, and improvement of radiation pattern and polarization purity. By using corner-truncated square patch as the array element and adopting appropriate level of sequential rotation series-parallel feeding structures as feeding networks, microstrip arrays can generate excellent circular polarization (CP) over a relatively wide frequency band. They can find wide applications in phased array radar and satellite communication systems.

scholarly journals Comment on ‘ Comment on ‘Enhancing the security of communication via directly modulated antenna arrays’ ’.docx

2019 ◽  
Author(s):  
Yuan Ding
Keyword(s):  
Antenna Arrays ◽  
Phased Array ◽  
Directional Modulation

A comment provided by Tao Hong concluded that ‘the directional modulation (DM) signal synthesised using a phased array needs at least three elements’. This loose conclusion is challenged here by clarifying some DM concepts that are foundations of the DM framework.

scholarly journals Mathematical model of a measuring complex for determining the external parameters of active phased antenna arrays in the near zone.

2021 ◽  
Author(s):  
V.N. Atrokhov ◽  
◽  
A.V. Litvinov ◽  
S.E. Mishchenko ◽  
V.V. Shatsky ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Field Distribution ◽  
Antenna Arrays ◽  
Phased Array ◽  
Phase Distribution ◽  
Phased Antenna Arrays ◽  
Measuring Complex ◽  
Proposed Model ◽  
Near Zone ◽  
Electrodynamic Modeling

When measuring characteristics of the modern multi-element active phased antenna arrays amplifications method may have problems processing the results of measurements, due to the complexity of the exact adjustment of the overall active phased array, the fluctuations of the parameters of microwave amplifiers, the failure of individual elements, the inadmissibility of the full radiation of aperture antennas in an anechoic chamber. Electrodynamic modeling of active phased array antennas in specialized programs usually requires very large computational costs and it is very difficult to take into account fluctuations in parameters and failures of active phased array elements. In this regard, a mathematical model of the measuring complex is proposed for estimating the field distribution in the near zone of vibratory antenna arrays and generating radiation patterns. The estimation methodology is based on direct measurements of the amplitude-phase distribution of the field of the antenna system on the selected surface in the immediate vicinity of its aperture using a sounding antenna. The main relations for the model are the well-known expressions for calculating the field distribution in the near zone of a vertical symmetrical vibrator, the method of induced electromotive force, and matrix relations for converting the field into various coordinate systems. The model of the measuring complex is used to evaluate the characteristics of the active phased array in the near and far zones. However, it can be used to check real experimental data, taking into account fluctuations in the parameters of the amplitude-phase distribution in the aperture, and failures of antenna elements. The conducted research has shown a good agreement between the calculated characteristics of the active phased array using the proposed model and the aperture method. The time for calculating the antenna directivity characteristics in the proposed model is 30 minutes. The main time is associated with the addition of resistance matrices with elements related to each new position of the probe antenna. However, this time is not comparable to the time required to implement the measurement model in specialized electrodynamic modeling packages.

scholarly journals Principles of implementing coaxial microwave connectors for modern radioelectronic systems

2020 ◽  
pp. 20-27
Author(s):  
E. N. Glushechenko
Keyword(s):  
Antenna Arrays ◽  
Phased Array ◽  
Coaxial Waveguide ◽  
Array Antenna ◽  
Phased Array Antenna ◽  
Waveguide Junction ◽  
Technical Parameters ◽  
Threaded Joints ◽  
Waveguide Transformer ◽  
Technical Solutions

Many modern radioelectronic systems are based on antenna arrays such as APAA (active phased array antenna) or DAAR (digital active array antenna), which require specialized connectors of new types and design solutions for the input/output of the microwave signal. The aim of this work is to improve the performance and reliability of coaxial microstrip connectors and coaxial waveguide transformer connectors of longitudinal type. The paper analyzes the arrangement principles of antenna feeders in modern radioelectronic systems with microwave connectors and substantiates the need to create new types of specialized microwave connectors. The authors demonstrate the issues that arise when using known coaxial microstrip connectors with threaded joints in antenna arrays. The paper considers the principles of implementing a cut-in microwave connector with hyperboloid contacts and its advantages, as well as the design of such a connector, i. e., the block coaxial microstrip transition and the cable part. The main technical parameters of cut-in microwave connectors are given. Using the analysis of the advantages and drawbacks of the known coaxial waveguide junction, the authors develop the requirements for the creating new microwave connectors of this type. The paper presents a design version of the longitudinal coaxial waveguide transformer connectors and their main characteristics.The considered design versions of the cut-in coaxial microstrip connector and the longitudinal coaxial waveguide transformer connector were manufactured and their characteristics were carefully studied. Analysis of the research results and measured parameters allow asserting that the proposed technical solutions are reliable, reproducible, can be mass produced, and thus can be recommended for use in modern radioelectronic systems.

scholarly journals Printed broadband dipole for phased array antenna

2020 ◽  
pp. 38-45
Author(s):  
A. S. Razumikhin ◽  
G. N. Devyatkov ◽  
K. A. Laiko ◽  
J. O. Filimonova
Keyword(s):  
Equivalent Circuit ◽  
Frequency Band ◽  
Antenna Arrays ◽  
Phased Array ◽  
Dielectric Substrate ◽  
Array Antenna ◽  
Electromagnetic Modeling ◽  
Phased Array Antenna ◽  
Phased Antenna Arrays ◽  
Directivity Characteristics

The article discusses ways to increase the operating frequency band of a symmetrical broadband vibrator in printed version for a phased array antenna. The equivalent circuit of such an emitter is described. Various designs of an emitter made on a Rogers RT5880 dielectric substrate with a thickness of t = 1.5 mm and εr = 2.2 and the results of electromagnetic modeling are considered. A wide working band is achieved due to the introduction of a dual-circuit system and a modified geometry of the vibrator arms. Topologies, as well as matching and directivity characteristics of three types of antennas are given. The developed antenna is intended for use in broadband systems both as a separate independent antenna and as a radiator for digital phased antenna arrays. The CST Microwave studio environment was used to simulate the emitter.

scholarly journals Analysis of the influence of radiators basing errors in the monopulse phased array antenna aperture on its characteristics

2019 ◽  
Vol 30 ◽  
pp. 05019
Author(s):  
Yury Rusov
Keyword(s):  
Antenna Array ◽  
Radiation Pattern ◽  
Antenna Arrays ◽  
Phased Array ◽  
Array Antenna ◽  
Beam Forming ◽  
Phased Array Antenna ◽  
Antenna Aperture ◽  
Forming Accuracy ◽  
The Difference

The influence of radiators basing errors in the flat monopulse phased array antenna with spatial excitation on the beam forming accuracy is researched. The results of calculations of the deviation of the position of the difference radiation pattern minimum depending on the displacement of the antenna array radiators for antenna arrays with diameters from 10 to 100 wavelengths are presented.

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