Design and analysis of CPW-fed compact planar antennas for ultra wideband communication systems

2016 ◽  
Author(s):  
◽  
Haitham Alsaif
Keyword(s):  
Communication Systems ◽  
High Performance ◽  
Low Cost ◽  
Single Layer ◽  
Ultra Wideband ◽  
University Of Missouri ◽  
Uwb Antennas ◽  
Operating Frequency Range ◽  
Performance Results ◽  
Compact Planar

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] In this research, three new designs of planar compact ultra-wideband (UWB) antennas have been studied, simulated, and experimentally measured. Their structures are not complicated in design, easy in fabrication with low cost. They are in different physical sizes and considered small compared to many recent published UWB antennas that have similar performance. The proposed antennas have ultra-wide bandwidth that cover the entire bandwidth allocated by FCC for such applications. They are made to be planar structure with a single layer in order to be easier in fabrication and for use in wireless devices and applications. The used feeding technique is coplanar wave-guide (CPW) in all of them due to the great advantages of this feeding methodology. Each design has certain more superiority over the others either in terms of operating frequency range, power gain, radiation pattern, or structure size. Although, all compact patch antennas demonstrate high performance results and are very suitable for ultra-wideband systems. Finally, since there are a variety of ultra-wideband applications with several characteristics requirements, the research is composed of three different sizes of compact planar single layers antennas. These antennas have similar or better performance than some other large size designs, which makes it suitable for very compact wireless gadgets. Thus, the ultra-wideband (UWB) systems designer will be able to select the most appropriate design for the application based on the antenna characterizes and size.

scholarly journals Graphene on Silicon Photonics: Light Modulation and Detection for Cutting-Edge Communication Technologies

2021 ◽  
Vol 12 (1) ◽  
pp. 313
Author(s):  
Siqi Yan ◽  
Jeremy Adcock ◽  
Yunhong Ding
Keyword(s):  
Silicon Photonics ◽  
Communication Systems ◽  
High Performance ◽  
Low Cost ◽  
Single Layer ◽  
Photonic Devices ◽  
Optoelectronic Properties ◽  
Propagation Loss ◽  
Honeycomb Lattice ◽  
Light Modulation

Graphene—a two-dimensional allotrope of carbon in a single-layer honeycomb lattice nanostructure—has several distinctive optoelectronic properties that are highly desirable in advanced optical communication systems. Meanwhile, silicon photonics is a promising solution for the next-generation integrated photonics, owing to its low cost, low propagation loss and compatibility with CMOS fabrication processes. Unfortunately, silicon’s photodetection responsivity and operation bandwidth are intrinsically limited by its material characteristics. Graphene, with its extraordinary optoelectronic properties has been widely applied in silicon photonics to break this performance bottleneck, with significant progress reported. In this review, we focus on the application of graphene in high-performance silicon photonic devices, including modulators and photodetectors. Moreover, we explore the trend of development and discuss the future challenges of silicon-graphene hybrid photonic devices.

scholarly journals 2D MoS2 Encapsulated Silicon Nanopillar Array with High-Performance Light Trapping Obtained by Direct CVD Process

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 267
Author(s):  
Minyu Bai ◽  
Zhuoman Wang ◽  
Jijie Zhao ◽  
Shuai Wen ◽  
Peiru Zhang ◽  
...  
Keyword(s):  
Silicon Substrate ◽  
High Performance ◽  
Low Cost ◽  
Light Trapping ◽  
Incident Light ◽  
Single Layer ◽  
Chemical Vapor ◽  
Optoelectronic Device ◽  
Planar Silicon ◽  
Shortwave Infrared

Weak absorption remains a vital factor that limits the application of two-dimensional (2D) materials due to the atomic thickness of those materials. In this work, a direct chemical vapor deposition (CVD) process was applied to achieve 2D MoS2 encapsulation onto the silicon nanopillar array substrate (NPAS). Single-layer 2D MoS2 monocrystal sheets were obtained, and the percentage of the encapsulated surface of NPAS was up to 80%. The reflection and transmittance of incident light of our 2D MoS2-encapsulated silicon substrate within visible to shortwave infrared were significantly reduced compared with the counterpart planar silicon substrate, leading to effective light trapping in NPAS. The proposed method provides a method of conformal deposition upon NPAS that combines the advantages of both 2D MoS2 and its substrate. Furthermore, the method is feasible and low-cost, providing a promising process for high-performance optoelectronic device development.

scholarly journals A high performance ultra-wideband low cost SMA-to-GCPW transition

2016 ◽  
Vol 13 (12) ◽  
pp. 20160290-20160290 ◽  
Author(s):  
Ding Xu ◽  
Zhengpeng Wang ◽  
Yi Wang ◽  
Jianhua Wu
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Ultra Wideband

scholarly journals A time domain spherical near-field measurement facility for UWB antennas employing a hardware gating technique

2010 ◽  
Vol 8 ◽  
pp. 243-250 ◽  
Author(s):  
M. D. Blech ◽  
M. M. Leibfritz ◽  
R. Hellinger ◽  
D. Geier ◽  
F. A. Maier ◽  
...  
Keyword(s):  
Time Domain ◽  
Pulse Generator ◽  
Low Cost ◽  
Near Field ◽  
Ultra Wideband ◽  
Time Interval ◽  
Measurement Facility ◽  
Antenna Measurement ◽  
Uwb Antennas ◽  
Equivalent Time

Abstract. A spherical near-field antenna measurement facility employing a time domain hardware gating technique is presented. On-off keyed sinusoidal impulses are used as stimuli requiring wideband antennas with a bandwidth in excess of 400 MHz. The received signal is evaluated in the time interval after reaching the steady state and before multipath components arising in the non-ideal anechoic chamber distort the signal. An application specific pulse generator synthesizing sinusoidal impulses with a sub-nanosecond settling time and a low-cost equivalent time (ET) sampling receiver developed and optimized for this particular purpose are described. Measurement results of typical ultra-wideband (UWB) antennas show a significant improvement of the measured antenna pattern compared to conventional techniques.

High performance ultra wide band patch antenna design with minimized optimization parameters

2015 ◽  
Author(s):  
◽  
Falih Mahdi Mousa Alnahwi
Keyword(s):  
High Performance ◽  
Wide Band ◽  
Ultra Wide Band ◽  
Optimized Design ◽  
University Of Missouri ◽  
Uwb Antennas ◽  
Antenna Performance ◽  
Optimization Parameters ◽  
Improved Performance ◽  
The University

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] In this work, we propose ultra wide band antennas that have small size and simple shapes. The new designs have comparable or improved performance than those of the already available antennas. The thesis aims can be summarized as follows: 1) First, design and fabricate both monopole and wide slot UWB antennas that have simple and small structures and analyze for performance comparable to those of the more complex designs and/or larger size. This part of the thesis can be achieved by modifying already existing antennas, and then utilize them to achieve the second aim of this work, as discussed below. 2) Propose new generalized ways for band notch generation that are suitable for all UWB antennas. This will result in a significant reduction in the optimization parameters. Finally the optimized design will be fabricated to verify the proposed idea. 3) Design and fabricate a new planar monopole switchable antenna that can switch between Multiband/UWB mode that covers the entire indoor applications and Multiband mode that covers some of the outdoor applications for a versatile antenna performance.

scholarly journals Dual Band Notched UWB MIMO Antenna for Surfaces Penetrating Application

2019 ◽  
Vol 8 (3) ◽  
pp. 6-15
Author(s):  
A. Chaabane ◽  
A. Babouri
Keyword(s):  
Low Cost ◽  
Multiple Input Multiple Output ◽  
Ultra Wideband ◽  
Dual Band ◽  
Mimo Antenna ◽  
Compact Size ◽  
Multiple Input ◽  
Input Multiple Output ◽  
White Portland Cement ◽  
Compact Planar

This paper introduces a novel compact planar Ultra-Wideband (UWB) Multiple-Input-Multiple-Output (MIMO) antenna with dual-band notched performance for Surfaces Penetrating (SP) application. To avoid interference from co-existing systems, two notched bands are introduced by including strips inside the radiating patches. The two ports MIMO antenna is printed on the low-cost FR4 substrate having a compact size of 56×32.47×1.5 mm3. The measured results indicate that the −10 dB bandwidth of the proposed MIMO antenna covers a wide bandwidth from 1.57 GHz to 12.4 GHz (155.05%) with dual-band rejection (2.04 GHz – 3.98 GHz and 4.8 GHz – 6.22 GHz). The effects of numerous construction and decoration surfaces on the antenna’s reflection coefficients are measured. Gypsum, White Portland Cement, Slate, Marble, Wood and Reinforced Concrete were tested. A good penetrating capability is measured which confirms the aptitude of the proposed MIMO antenna to work as SP antenna.

FM-CW compact reflectometer using DDS signal generation

2021 ◽  
Vol 16 (11) ◽  
pp. C11005
Author(s):  
A. Silva ◽  
J. Dias ◽  
J. Santos ◽  
F. da Silva ◽  
B. Gonçalves
Keyword(s):  
Integrated Circuits ◽  
Communication Systems ◽  
Low Cost ◽  
Ultra Wideband ◽  
Signal Generation ◽  
Single Chip ◽  
Constant Frequency ◽  
Band Frequency ◽  
Full Band ◽  
External Clock

Abstract A prototype of a compact coherent fast frequency sweeping RF back-end is being developed at IPFN-IST using commercial Monolithic Microwave Integrated Circuits (MMIC). On this work we present the usability of this concept of compact reflectometry associated with a Direct Digital Synthesis (DDS) source. Flexibility is one of the design goals for the back-end prototype, so that it can easily match the required frequency range. The backend alone covers the NATO J-band (10 GHz to 20 GHz) and is designed to drive external full band frequency multipliers, resulting in an ultra-wideband coverage of up to 140 GHz. FM-CW radar precision is strongly dependent on the probing source linearity. DDS nowadays plays an important role in signal generation in many fields of applications for communication systems as well as in radar technology. Modern DDSs are fully integrated, low-cost, single chip solutions that only need an external clock source for generating sinusoidal output signals up to several gigahertz. The DDS benefits from the totally digital generation of the output signal, which allows full control of the signal’s frequency and phase, both with very high precision and resolution. Recent implementations feature automatic sweeping capability, thus allowing the DDS to generate very linear and agile frequency chirps, assuming a high quality and constant frequency reference clock source. We propose to implement a DDS signal generation solution with the capability of a full band sweep in 1 μs. On the receiver side the IF and reference signals will be digitised allowing the use of high flexible data processing techniques. Input/output signals will allow the synchronisation of several systems.

scholarly journals Wireless Body Sensor Communication Systems Based on UWB and IBC Technologies: State-of-the-Art and Open Challenges

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3587
Author(s):  
Ivana Čuljak ◽  
Željka Lučev Vasić ◽  
Hrvoje Mihaldinec ◽  
Hrvoje Džapo
Keyword(s):  
Communication Systems ◽  
Short Range ◽  
Ieee 802.15.4 ◽  
State Of The Art ◽  
Low Cost ◽  
Ultra Wideband ◽  
Body Area ◽  
The Subject ◽  
Wireless Interfaces ◽  
User Friendly

In recent years there has been an increasing need for miniature, low-cost, commercially accessible, and user-friendly sensor solutions for wireless body area networks (WBAN), which has led to the adoption of new physical communication interfaces providing distinctive advantages over traditional wireless technologies. Ultra-wideband (UWB) and intrabody communication (IBC) have been the subject of intensive research in recent years due to their promising characteristics as means for short-range, low-power, and low-data-rate wireless interfaces for interconnection of various sensors and devices placed on, inside, or in the close vicinity of the human body. The need for safe and standardized solutions has resulted in the development of two relevant standards, IEEE 802.15.4 (for UWB) and IEEE 802.15.6 (for UWB and IBC), respectively. This paper presents an in-depth overview of recent studies and advances in the field of application of UWB and IBC technologies for wireless body sensor communication systems.

A compact single layer branch-line coupler for ultra-wideband (UWB) applications

2016 ◽  
Vol 9 (3) ◽  
pp. 505-508 ◽  
Author(s):  
Sangeetha Velan ◽  
Malathi Kanagasabai
Keyword(s):  
Power Output ◽  
Return Loss ◽  
Ground Plane ◽  
Single Layer ◽  
Ultra Wideband ◽  
Branch Line ◽  
Multi Stage ◽  
Band Ring ◽  
Uwb Applications ◽  
Compact Planar

This paper presents the design of a compact, planar, single layer, tri-section ultra-wideband (UWB) branch-line (BL) coupler. The prototype offers 10 dB return loss characteristics from 3.1 to 13.7 GHz. Over a major portion of the band, phase imbalance of ±10° is achieved. The method of deploying multi stage impedance feed has been used to achieve improved bandwidth. To enhance the power output through the coupled port throughout the operating band, ring shaped slots have been introduced in the ground plane beneath the series arms. The performance of the fabricated prototype has also been validated experimentally.

scholarly journals Compact Ultra Wide Band Microstrip Bandpass Filter Based on Multiple-Mode Resonator and Modified Complementary Split Ring Resonator

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
J. Antonio Marcotegui ◽  
Jesús Miguel Illescas ◽  
Aritz Estevez ◽  
Francisco Falcone
Keyword(s):  
Communication Systems ◽  
High Performance ◽  
Ring Resonator ◽  
Low Cost ◽  
Wide Band ◽  
Split Ring Resonator ◽  
Ultra Wide Band ◽  
Split Ring ◽  
Complementary Split Ring Resonator ◽  
Wide Range

A new class of broadband microstrip filters for Ultra Wide Band (UWB) applications is proposed. In the design, different stages of parallel-coupled microstrip line and other stages with a Modified Complementary Split Ring Resonator (MCSRR)—a concept proposed here for the first time—are adjusted to obtain the desired response with broadband, sharp rejection, low insertion loss, and low return loss. Full wave simulation results as well as measurement results from fabricated prototypes are presented, showing good agreement. The proposed technique offers a new alternative to implement low-cost high-performance filter devices, applicable to a wide range of communication systems.

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