scholarly journals ARRAY FACTOR IN CURVED MICROSTRIPLINE ARRAY ANTENNA FOR RADAR COMMUNICATION SYSTEMS

2019 ◽  
Author(s):  
Putu Artawan ◽  
Yono Hadi Pramono ◽  
Mashuri ◽  
Josaphat T. Sri Sumantyo
Keyword(s):  
Communication Systems ◽  
Array Antenna

scholarly journals Cooperative Antenna Selection Method for Directional Antenna Ad Hoc Networks Based on ALOHA

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Bowen Zheng ◽  
Songlin Sun ◽  
Guoyuan Shao
Keyword(s):  
Communication Systems ◽  
Phased Array ◽  
Time Synchronization ◽  
Antenna Selection ◽  
Transmission Probability ◽  
Directional Antennas ◽  
Selection Method ◽  
Array Antenna ◽  
Phased Array Antenna ◽  
External Time

In recent years, directional antennas or phased array antennas are being widely used in communication systems due to the higher antenna gains. However, without external time synchronization and angle synchronization, the unsynchronized node usually takes a long time to synchronize with the existing nodes due to the narrow beams. Although the multibeam transmission or the digital phased array antenna can reduce this problem, it is clear that the cost of the digital phased array antenna is currently too high. Without external time synchronization and angle synchronization, a cooperative antenna selection method based on directional antennas is proposed in this paper. Our method only uses the narrow beams to transmit and to receive and reduces the time for self-synchronization. In this paper, we give the expression of the expected average time for the self-synchronization of multiple nodes, transform the problem into the problem of finding the minimum value of the infinite norm of the sequence, and then propose a cooperative antenna selection method which calculates the optimal transmission probability distribution of the node in different directions through parameter sharing and relative geometric position relationship between nodes. Finally, we verify the proposed method through simulation, and the number of beams is set between 6 and 10. In a typical scenario of five nodes, our method reduces the maximum average self-synchronization time by 50% averagely, compared with the traditional method which sends the different antenna beams at equal probability.

scholarly journals Series-fed 3×3 Square Patch Array for Wireless Communication Applications using CSTMWS

2019 ◽  
Vol 9 (1) ◽  
pp. 5424-5429 ◽  
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Simulation Software ◽  
Array Antenna ◽  
Strip Line ◽  
Rate Transmission ◽  
Data Rates ◽  
Quarter Wave ◽  
Wireless Communications Systems ◽  
Free Material

The wireless communications systems have been really develop to the extraordinary performance applications. Present days, the WCS offers extraordinary data rate transmission and preserve rising for advanced data rates equipment. In wireless communication systems applications using various types of micro strip antennas. This paper presents the design of a 3×3 series-fed square micro strip patch array antenna to function at the frequency of 5.4 GHz and 50 ohm line port impedance. The micro strip feed line frequently combines a quarter-wave (λ/4) transformer for matching of impedance. The design of proposed antenna we are expending straight line feed micro strip line feeding technique. This antenna array is based on Rogers RT 5880 loss free material, which is having 2.2 relative permittivity constant. The series fed 3 by 3 square patch array antenna is designed on Computer Simulation Technology (CST) Microwave Studio (MWS) simulation software. After simulation, the antenna presentation features such as return loss, percentage bandwidth, directivity, antenna gain, radiation efficiency, E-Field, H-Field and radiation Pattern are measured.

scholarly journals A Hybrid Technique Using Combinatorial Cyclic Difference Sets and Binomial Amplitude Tapering for Linear Sparse Array Antenna Design

2016 ◽  
Vol 5 (3) ◽  
pp. 73 ◽  
Author(s):  
E. Sandi ◽  
F. Y. Zulkifli ◽  
E. T. Rahardjo
Keyword(s):  
Communication Systems ◽  
Difference Sets ◽  
Array Antenna ◽  
Antenna Design ◽  
Hybrid Technique ◽  
Array Design ◽  
Sparse Array ◽  
Cyclic Difference Sets ◽  
Radar Systems ◽  
Measurement Results

Reducing system complexity and cost in synthesizing a sparse array antenna design is a challenging task for practical communication systems, such as radar systems and space communication. In this paper, a hybrid technique to synthesize a linear sparse array antenna design is described. This technique is developed using two methods. The first method is a combinatorial approach that applies cyclic difference sets (CDS) integers to significantly reduce the number of antenna elements. The approach and procedure used to apply the new CDS method to configure a linear sparse array, with significant reduction of the spatial antenna dimension, is described. The second method, applied to the array result of the first method, is amplitude tapering using a binomial array approach to reduce the sidelobes level (SLL). The simulation and measurement results of the sample sparse array design showed that the SLL was reduced in comparison to the sparse array design using only the combinatorial CDS method.

scholarly journals Design and Implementation of a Corporate Fed Two Element Antennae Array using Miters

2020 ◽  
Vol 9 (4) ◽  
pp. 2777-2781
Keyword(s):  
Reflection Coefficient ◽  
Wireless Communication ◽  
Antenna Array ◽  
Communication Systems ◽  
Array Antenna ◽  
Wireless Communication Systems ◽  
Design And Implementation ◽  
Challenging Issue ◽  
Wireless Application ◽  
Element Array

In wireless communication systems, designing of antennae with required parameters is an challenging issue. So, The approach in this paper is to design a corporate fed 2 element antenna array is designed to operate at 2.4 GHz using an FR-4 substrate of height h=1.6mm. For wireless application all the antenna parameters are analysed for two element array antenna with element spacing λ, λ/2 and with miters. It is observed that bandwidth decreases by decreasing the element spacing. But by using miters for antenna with element spacing bandwidth and reflection coefficient are improved. All the antennae are fabricated and tested using VNA E5071C.

scholarly journals An All-Metal High-Gain Radial-Line Slot-Array Antenna for Low-Cost Satellite Communication Systems

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 139422-139432
Author(s):  
Mst Nishat Yasmin Koli ◽  
Muhammad U. Afzal ◽  
Karu P. Esselle ◽  
Raheel M. Hashmi
Keyword(s):  
Communication Systems ◽  
Satellite Communication ◽  
Low Cost ◽  
High Gain ◽  
Array Antenna ◽  
Radial Line
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