scholarly journals Broadband Microstrip Antenna for 5G Wireless Systems Operating at 28 GHz

Electronics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 1
Author(s):  
Rafal Przesmycki ◽  
Marek Bugaj ◽  
Leszek Nowosielski
Keyword(s):  
Microstrip Antenna ◽  
Communication Systems ◽  
High Speed ◽  
Wireless Systems ◽  
High Energy ◽  
Design Solution ◽  
Radio Communication ◽  
Compact Structure ◽  
Large Bandwidth ◽  
Fifth Generation

Communication systems have been driven towards the fifth generation (5G) due to the demands of compact, high speed, and large bandwidth systems. These types of radio communication systems require new and more efficient antenna designs. This article presents a new design solution of a broadband microstrip antenna intended for use in 5G systems. The proposed antenna has a central operating frequency of 28 GHz and can be used in the LMDS (local multipoint distribution service) frequency band. The dimensions of the antenna and its parameters have been calculated, simulated, and optimized using the FEKO software. The antenna has a compact structure with dimensions (6.2 × 8.4 × 1.57) mm. Rogers RT Duroid 5880 material was used as a substrate for the antenna construction, which has a dielectric coefficient of 2.2 and a thickness of 1.57 mm. The antenna described in the article is characterized by a low reflection coefficient of −22.51 dB, a high energy gain value of 3.6 dBi, a wide operating band of 5.57 GHz (19.89%), and high energy efficiency.

Train-mounted Broadband Monopole Antenna for 5G Communication

2021 ◽  
Vol 36 (7) ◽  
pp. 879-884
Author(s):  
Hao Li ◽  
Lu Xu ◽  
Feng Qian ◽  
Yong Zhou
Keyword(s):  
Mobile Communication ◽  
Communication Systems ◽  
High Speed ◽  
High Gain ◽  
Monopole Antenna ◽  
Mobile Terminals ◽  
High Speed Railway ◽  
Public Transport System ◽  
Fifth Generation ◽  
5G Mobile Communication

As a convenient and efficient public transport system, high speed railway (HSR) was rapidly deployed in China. Since the fifth generation (5G) mobile communication system is commercially applied, it is necessary for mobile terminals antennas to cover multiple operating bands to be compatible with various communication systems. Here a HSR-mounted broadband and high-gain monopole antenna is proposed. By using the meander technology and introducing the tapered structure, the proposed antenna operates over a bandwidth of 694-960 MHz and 1350-5975 MHz (VSWR<1.8), which covers both 2G-5G mobile communication and WiFi frequency bands. The dimensions of the proposed antenna are 400 mm × 330 mm × 78 mm. The measured average gain is 6.11 dBi over the entire bandwidth.

scholarly journals Compact Ultra-Wideband Series-Feed Microstrip Antenna Arrays for IoT Communications

2021 ◽  
Vol 11 (14) ◽  
pp. 6267
Author(s):  
Tiago Varum ◽  
João Caiado ◽  
João N. Matos
Keyword(s):  
Internet Of Things ◽  
Antenna Arrays ◽  
Millimeter Waves ◽  
Microstrip Antenna ◽  
Communication Systems ◽  
High Gain ◽  
Ultra Wideband ◽  
Huge Number ◽  
Compact Structure ◽  
High Bandwidth

Modern communication systems require high bandwidth to meet the needs of the huge number of sensors and the growing amount of data consumed, and an exponential growth is expected in the future with the integration of internet of things networks. Spectrum regions in the millimeter waves have aroused new interests, mainly because of the contiguous bands available to meet these needs. In return, and to combat the high losses of propagation in these frequencies, higher gain antennas are needed. This paper describes the use of a logarithmic architecture in the design of microstrip antenna arrays, creating structures with high gain and ultra-wide bandwidth. Three different solutions are presented with five, seven, and nine elements, reaching about 25%, 30%, and 44% of bandwidth, achieving ultra-wideband behavior, efficient and with a compact structure operating at frequencies in around 28 GHz.

scholarly journals An auto synchronization technique of unipolar MPAM signals in OFDM and its application for optical wireless communication systems

2015 ◽  
Vol 18 (3) ◽  
pp. 218-224
Author(s):  
Khoa Le Dang ◽  
Phuong Huu Nguyen ◽  
Hiroshi Ochi
Keyword(s):  
Electromagnetic Interference ◽  
Communication Systems ◽  
Orthogonal Frequency Division Multiplexing ◽  
High Speed ◽  
Wireless Systems ◽  
Cyclic Prefix ◽  
Wireless Communication Systems ◽  
Optical Wireless Communication ◽  
Frequency Division ◽  
Optical Wireless

Optical wireless systems have attracted attention, because they allow high-speed transmission without electromagnetic interference. Orthogonal frequency division multiplexing (OFDM) can send multiple high speed signals by using orthogonal carrier frequencies. Recently, studies have been focused on the optimal OFDM technique for optical wireless systems. When using OFDM, one important issue is determining the cyclic prefix and removing it from the frame before the receiver detects signals. In this paper, we propose a new auto synchronization technique of unipolar MPAM signals. It can remove the cyclic prefix in any sample of the OFDM frame using unipolar MPAM. It is a candidate for wideband systems and using 2-PAM or 4-PAM. The results of mathematical analysis and simulations show that it can be used for optical wireless systems.

Differential space-time block coding method for application in mobile radio communication systems using MIMO technology.

2021 ◽  
Author(s):  
M.S. Tokar ◽  
◽  
I.V. Ryabov ◽  
Keyword(s):  
Communication Systems ◽  
High Speed ◽  
Communication Channel ◽  
Space Time ◽  
The State ◽  
Radio Communication ◽  
Transmission Method ◽  
Space Time Coding ◽  
Channel One ◽  
Differential Transmission

In radio communication systems, when implementing coherent types of reception, it is assumed that the receiver knows information about the state of the communication channel, which is achieved by introducing signal redundancy (pilot signals). The frequency of sending pilot signals depends on factors that change the state of the communication channel, one of which is the high speed of movement of mobile stations. The use of pilot signals not only hinders the efficient use of the radio frequency resource, but also, in the case of fast fading, does not allow the channel to be estimated and tracked with the required accuracy. These disadvantages can be eliminated by using the differential transmission method, for the implementation of which there is no need to know information about the state of the channel. The application of the principles of differential transmission to space-time coding does not find sufficiently effective solutions that combine low computational complexity and energy efficiency of differential coding methods.

scholarly journals Pattern Reconfigurable Wideband Stacked Microstrip Patch Antenna for 60 GHz Band

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Alexander Bondarik ◽  
Daniel Sjöberg
Keyword(s):  
Microstrip Antenna ◽  
Communication Systems ◽  
High Speed ◽  
Wireless Communication Systems ◽  
60 Ghz ◽  
Central Frequency ◽  
Shift Method ◽  
Microstrip Patch ◽  
Parasitic Patch ◽  
Measurement Results

A beam shift method is presented for an aperture coupled stacked microstrip antenna with a gridded parasitic patch. The gridded parasitic patch is formed by nine close coupled identical rectangular microstrip patches. Each of these patches is resonant at the antenna central frequency. Using four switches connecting adjacent parasitic patches in the grid, it is possible to realize a pattern reconfigurable antenna with nine different beam directions in broadside, H-plane, E-plane, and diagonal planes. The switches are modeled by metal strips and different locations for strips are studied. As a result an increase in the antenna coverage is achieved. Measurement results for fabricated prototypes correspond very well to simulation results. The antenna is designed for 60 GHz central frequency and can be used in high speed wireless communication systems.

scholarly journals Sub-THz Antenna for High-Speed Wireless Communication Systems

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Hamsakutty Vettikalladi ◽  
Waleed Tariq Sethi ◽  
Ahmad Fauzi Bin Abas ◽  
Wonsuk Ko ◽  
Majeed A. Alkanhal ◽  
...  
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
High Speed ◽  
High Gain ◽  
Wireless Communication Systems ◽  
Impedance Bandwidth ◽  
Single Element ◽  
Compact Structure ◽  
Good Efficiency ◽  
High Data

Terahertz (THz) links will play a major role in high data rate communication over a distance of few meters. In order to achieve this task, antenna designs with high gain and wideband characteristics will spearhead these links. In this contribution, we present different antenna designs that offer characteristics better suited to THz communication over short distances. Firstly, a single-element antenna having a dipole and reflector is designed to operate at 300 GHz, which is considered as a sub-terahertz band. That antenna achieves a wide impedance bandwidth of 38.6% from 294 GHz to 410 GHz with a gain of 5.14 dBi. Secondly, two designs based on the same dipole structure but with added directors are introduced to increase the gain while maintaining almost the same bandwidth. The gains achieved are 8.01 dBi and 9.6 dBi, respectively. Finally, an array of 1×4 elements is used to achieve the highest possible gain of 13.6 dBi with good efficiency about 89% and with limited director elements for a planar compact structure to state-of-the-art literature. All the results achieved make the proposed designs viable candidates for high-speed and short-distance wireless communication systems.

scholarly journals Effective Power Allocation Using for Transmit Source In MIMO Relay Communication

2021 ◽  
Vol 5 (3) ◽  
Author(s):  
Hoai Trung Tran
Keyword(s):  
Channel Capacity ◽  
Communication Systems ◽  
High Speed ◽  
Mimo Systems ◽  
Multiple Input Multiple Output ◽  
Optimization Method ◽  
Radio Communication ◽  
Second Derivatives ◽  
Multiple Input ◽  
Input Multiple Output

The Multiple Input Multiple Output (MIMO) systems using relays are of interest for high-speed radio communication systems. Currently, most of the articles are interested in the model of three nodes with purposes such as increasing the channel capacities (mutual information) or reducing the minimum mean square of error. This paper extends to more than one relay and is concerned with the maximum channel capacity. It is assumed that the channel matrices between source and relay as well as relay and receiver are random matrices; the relay precoders are also assumed to be random and known at the receiver. The article proposes that the Lagrange multiplier finding algorithm using the Newton – Raphson optimization method is more straightforward than the traditional finding algorithm using the first and second derivatives but still gives a higher channel capacity.

scholarly journals Dual-/Tri-Wideband Bandpass Filter with High Selectivity and Adjustable Passband for 5G Mid-Band Mobile Communications

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 205 ◽  
Author(s):  
Zhanyong Hou ◽  
Chengguo Liu ◽  
Bin Zhang ◽  
Rongguo Song ◽  
Zhipeng Wu ◽  
...  
Keyword(s):  
Mobile Communications ◽  
Communication Systems ◽  
High Speed ◽  
Bandpass Filter ◽  
Low Cost ◽  
Open Loop ◽  
Structural Deformation ◽  
Compact Structure ◽  
Compact Size ◽  
5G Mobile Communications

The design and implementation of the filters for the fifth-generation (5G) mobile communication systems are challengeable due to the demands of high integration, low-cost, and high-speed data transmission. In this paper, a dual-wideband bandpass filter (BPF) and a tri-wideband BPF for 5G mobile communications are proposed. The dual-wideband BPF consists of two folded open-loop stepped-impedance resonators (FOLSIRs), and the tri-wideband BPF is designed by placing a pair of folded uniform impedance resonator inside the dual-wideband BPF with little increase in the physical size of the filter. By employing a novel structural deformation of a stepped-impedance resonator, the FOLSIR is achieved with a more compact structure, a controllable transmission zero, and an adjustable resonant frequency. The measurement results show that the working bands of the two filters are 1.98–2.28/3.27–3.66 GHz and 2.035–2.305/3.31–3.71/4.54–5.18 GHz, respectively, which are consistent with the full-wave EM simulation results. The implemented filters have a compact size and the results show low loss, good out-of-band rejection, and wide passbands covering sub-6 GHz bands of 5G mobile communications and a commonly used spectrum.

scholarly journals Antena Mikrostrip Array 8x2 Elemen untuk Aplikasi Radio Gelombang Mikro

2021 ◽  
Vol 9 (2) ◽  
pp. 293
Author(s):  
SYAH ALAM ◽  
INDRA SURJATI ◽  
LYDIA SARI ◽  
JUSTIN TANUWIJAYA
Keyword(s):  
Microstrip Antenna ◽  
Communication Systems ◽  
Return Loss ◽  
Frequency Range ◽  
Radio Communication ◽  
Measurement Results ◽  
Microwave Radio ◽  
Working Frequency ◽  
Element Array ◽  
Return Value

ABSTRAKPeningkatan gain pada antena mikrostrip polarisasi melingkar menggunakan metode array 8x2 element diusulkan dalam penelitian ini. Antena yang diusulkan dirancang untuk bekerja pada rentang frekuensi 10700 – 11700 MHz untuk sistem komunikasi radio gelombang mikro. Untuk meningkatkan gain, antena yang diusulkan di optimasi menggunakan array dengan 8x2 elemen. Dari hasil pengukuran diperoleh nilai return loss -22.77 dB dan VSWR sebesar 1.156. Bandwidth yang dihasilkan dari antena array 8x2 elemen adalah 900 MHz dengan rentang frekuensi kerja 10700 MHz -11600 MHz serta impedansi sebesar 55.87 + j 4.97 Ω pada frekuensi kerja 10925 GHz. Gain dari antena array 8x2 elemen adalah 15.6 dB pada frekuensi kerja 10925 MHz. Optimasi dengan metode array 8x2 elemen berhasil meningkatkan Gain sampai dengan 47.76 % dibandingkan dengan desain array 4x2 element. Antena yang diusulkan cocok dijadikan kandidat untuk digunakan pada sistem komunikasi radio gelombang mikro.Kata kunci: antena, mikrostrip, gain, array, radio gelombang mikro ABSTRACTGain optimization on a circular polarization microstrip antenna using the 8x2 element array method is proposed in this study. The proposed antenna is designed to work in the frequency range 10700 - 11700 MHz for microwave radio communication systems. To increase the gain, the proposed antenna is optimized using an array with 8x2 elements. From the measurement results obtained return value of -22.77 dB and VSWR of 1,156. The Bandwidth produced from the 8x2 element antenna array is 900 MHz with a working frequency range of 10700 MHz - 11600 MHz and an impedance of 55.87 + j 4.97 Ω at a working frequency of 10925 MHz. The gain of the 8x2 element array antenna is 15.6 dB at a working frequency of 10925 MHz. Optimization with the 8x2 element array method succeeded in increasing Gain by up to 47.76% compared to the 4x2 element array design. The proposed antenna is suitable as a candidate for use in microwave radio communication systems.Keywords: microstrip, antenna, gain, array, microwave radio

scholarly journals Development of high-speed mobile radio communication systems using 40 GHz frequency band

Radio Science ◽  
2016 ◽  
Vol 51 (7) ◽  
pp. 1220-1233 ◽  
Author(s):  
H. Tsuji ◽  
K. Tsukamoto ◽  
K. Suzuki ◽  
H. Nagayama
Keyword(s):  
Frequency Band ◽  
Communication Systems ◽  
High Speed ◽  
Mobile Radio ◽  
Radio Communication
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