Analysis Of UWB Communication Systems

Improved Essays
In this paper, dual band notch Multi input Multi output (MIMO) System of two U-shape patch antennas has been evolved for the UWB application. Spacing between two elements of antennas is 0.270 at 3.1GHz for the UWB operation. To enhance isolation and increase bandwidth impedance, fork shaped stub added in the ground plane of the antenna. Due to interference of WIMAX (3.3-3.7 GHZ) and WLAN (5.2-5.8 GHz) on UWB dual band notch function is perform. For achieving the dual band notch characteristics, trekking slot cut in the patch with feed and C- shaped strip are placed adjacently to the feed line of the antenna. Due to fork shaped stub in ground plane, reducing of mutual coupling between elements | | ≤ -20dB. Peak gain, Efficiency Of antenna …show more content…
To assistance of several multimedia services, have higher data rate to wireless communication system. The necessity of high bit error rate (BER) wireless communication with high channel capacity and reliability, multiple-input multiple-output (MIMO) system is a desired method. In the multifunctional wireless communication application, MIMO antenna system should have compact structure and high isolation [2]. Numerous technique have been proposed for enhance isolation between the elements of a MIMO antenna because MIMO antenna system requires high isolation. The function of MIMO antenna depends on the inter-element spacing, aperture area, radiation pattern of single antenna element, array geometry and number of antenna elements. However, designing MIMO antenna over wide bandwidth is challenging tasks due to the tradeoff between inter-element spacing and mutual coupling. Mutual coupling and radiation patterns are governed by electrical separation between elements, which varies significantly with frequency over wide bandwidth. Larger inter-element spacing results in lower mutual coupling, but the size of the antenna becomes large which is not …show more content…
The geometry of the proposed MIMO antenna is illustrated in Fig. 1. The MIMO antenna printed of two symmetric U- shaped branch 30mm × 50mm × 1.6mm on FR-4 substrate with partial ground plane and micro strip-fed through ports 1 and 2.The spacing between of antenna elements λ/4(0.270 ) over UWB. Different types of MIMO antenna systems have been proposed for UWB applications. The designed systems show good impedance characteristics in the frequency band of 3.1-
10.6 GHz, Thus fulfilling the FCC requirements for UWB communications. These systems also have very low mutual coupling and correlations, so they provide good diversity performance. These MIMO Antennas are composed of identical stepped patch elements. In fig.8 reflection coefficient of UWB MIMO antenna is presented, there has ≤ -20 dB isolation which resonant at 3.7, 4.7 and 6.4 GHz all over UWB (3.1- 10.6GHz). B. Effect of Ground and Stub

For better isolation over wideband stub in ground proposed for the UWB antenna elements. Due to the inserting stub in ground plane of antenna there is increased in isolation over UWB. Edge to edge separation between elements is d (0.270

Related Documents

  • Great Essays

    Gravitational Waves

    • 3843 Words
    • 16 Pages

    GRAVITATIONAL WAVES, HOW CLOSE ARE WE? PHSCS 222 Collective Paper November 23, 1999 #123 #272 #666 #895 The Detection of Gravitational Waves, How Close Are We? Since the realization that the general theory of relativity predicts gravitational waves, there have been attempts to actually detect these waves. Indirect observations have been made that support their existence but no direct measurement.…

    • 3843 Words
    • 16 Pages
    Great Essays
  • Great Essays

    The wireless technologies have developed rapidly. In addition, I presented information about FDMA, CDMA and TDMA. However, I known that we need to keep our personal security information privacy when we are using…

    • 1458 Words
    • 6 Pages
    Great Essays
  • Improved Essays

    Attackers exploiting default configurations to gain access to the network and to information stored on devices in the network are major threat to home gateway devices. In order to mitigate this threat there are many common default configurations a user should change. When setting up a home network, a user should make sure to change the default passwords. They should set up a strong account password and wifi password using best practices. The user should use a strong security protocol such as WPA2 instead of the default WEP which is not secure.…

    • 693 Words
    • 3 Pages
    Improved Essays
  • Superior Essays

    Nt1310 Unit 9 Lab Report

    • 1032 Words
    • 5 Pages

    Rebecca McKenney Astronomy 101 Mrs. Alburg 25 March 2017 Chapter 2 Review Questions 1. For each of the following wavelength, state whether it is in the radio, microwave, infrared, visible, ultraviolet, X-Ray, or gamma portion of the electromagnetic spectrum and explain your answer. (Page 37 – 38) Original Number Nanometer (nm) Micrometer (μm) Millimeter (mm) Centimeter (cm) Meter (m) Kilometers (km) Angstrom (Å) 2.6 μm 2,600 2.6 0.0026 0.00026 0.0000026 0.0000000000026 26,000 34 m 34,000,000,000 34,000,000 34,000 3,400 34 0.034 340,000,000,000 0.54 nm 0.54 0.00054 0.00000054 0.000000054 0.00000000054 0.00000000000054 5.4 0.0032 nm 0.0032 0.0000032 0.0000000032 0.00000000032 0.0000000000032 0.0000000000000032 0.032 0.620 μm 0.62 0.62 0.00062 0.000062 0.00000062 0.00000000000062 6200…

    • 1032 Words
    • 5 Pages
    Superior Essays
  • Decent Essays

    In each scenario mentioned in previous section, we formulate network topologies as undirected graph $\mathcal{G}=(\mathcal{V},\mathcal{E})$ with $n$ nodes and $m$ edges having demand at a node $i$ in $\mathcal{V}$ given by $d_i$. Here, $\mathcal{V}$ indicates set of nodes and $\mathcal{E}$ indicates set of edges in the topology. A link would exist in the topology between node $i$ and node $j$, if they are in the communication range of each-other satisfying constraint, \begin{equation} P_i - PL_{(i,j)}\geq\delta_j; \forall (i,j)\in\mathcal{V}. \label{eqn:radio sensitivity} \end{equation} In equation~\ref{eqn:radio sensitivity}, $P_i$ is the transmit power (in dBm) at node $i$, $PL_{(i,j)}$ (in dB) is the pathloss between node $i$ and node $j$ and $\delta_j$…

    • 431 Words
    • 2 Pages
    Decent Essays
  • Improved Essays

    Natural Driving Quiz

    • 462 Words
    • 2 Pages

    DIGITAL FORENSIC AND INCIDENT REPORTING QUIZ 1. Destroying data, on a hard drive, is relatively easy and can be done one of two ways: a. Destroying the platters b. Wiping the entire hard drive c. Placing magnets on a hard drive d.…

    • 462 Words
    • 2 Pages
    Improved Essays
  • Improved Essays

    P1 Unit 3 Network Analysis

    • 1515 Words
    • 7 Pages

    You can move all around a home, anywhere really depending on the range of the signal. WLAN came about in the early 90s but was very expensive so you wouldn’t have a wireless router in your home back then. It wasn’t till the late 90s when it began to become cheaper. Most WLAN and proprietary protocols were using IEEE 802.11 either 802.11A through to 802.11N, prices for this declined rapidly making it more affordable.…

    • 1515 Words
    • 7 Pages
    Improved Essays
  • Improved Essays

    This LOTC was about United Health Care and Optum. I do not remember is Mike was a former Carlson student, but I do know that Grant was. These two men were really interesting to listen to because they talked quite a bit about their experience in business school and how they struggled with some of the material. They noted this was mostly because they felt that some information was unimportant. They also stated that now they wish they would have paid attention more because it turns out that almost all of the information actually was important.…

    • 882 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    Nt1330 Unit 6 Igms

    • 2070 Words
    • 9 Pages

    How can the attacker authenticate with a WiFi AP running WEP without possessing the right credentials? Ans: WEP uses shared key authentication involves the knowledge of shared WEP key by encrypting the challenge. Attacker monitoring the stream can guess the RC4 stream used for encryption by observing the challenge and encrypted message. Thus by monitoring a successful authentication attacker can easily forge an authentication. Advantage of using shared key is that it is user friendly but come with a…

    • 2070 Words
    • 9 Pages
    Improved Essays
  • Improved Essays

    802.11 Cons

    • 1585 Words
    • 7 Pages

    They enable clients to find them by transmitting Beacon frames with network parameters. This also allows hackers to launch an attack on a network, because the Beacon frames are not processed by any privacy functions, which means that the 802.11 network is available for anybody with an 802.11 card. Hackers with high-gain antennas can find networks from nearby roads or buildings and launch attacks without physically having…

    • 1585 Words
    • 7 Pages
    Improved Essays
  • Improved Essays

    Annotations: p 8 Posture: The posture of the lady in this picture indicates urgency to the message she is receiving for example her hand is gripping the table giving away that the message is intense and she was scared. If she moved her hand from the table there would surly be a sweaty hand print on the table. The man in the picture has his hand on his face suggesting so much emotion of being worried from the message he is receiving and his eyebrows are arched showing intensity to how he was feeling. His legs are crossed show some agitation of the news she was receiving from the radio.…

    • 805 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    Swot Analysis Of Wpa

    • 564 Words
    • 3 Pages

    Figure 1 shows the basic attendance and membership breakdown for the various weekly attendee groupings in WPA. The graph shows the weekly attendance sizes centered around 5,000 attendees per weekly attendance category. Furthermore, the red bar plus the blue bar represent the total membership per size category. The largest section of membership is captured in churches between 34-149 weekly attendees with 56% of the conferences total membership.…

    • 564 Words
    • 3 Pages
    Improved Essays
  • Decent Essays

    The first CD Band Antenna shipped out this week. This was a good collaborative effort on the part of the Cobham and Lockheed Martin team to drive this to completion. There were a lot of mounting challenges to overcome, however the team where focus and driven. The 2nd CD Band antenna has also been completed and is awaiting a drawing update and schedule to be source inspected early next week. In the production pipe line, we have 5 units currently being tune and are tracking well against the forecast.…

    • 89 Words
    • 1 Pages
    Decent Essays
  • Great Essays

    Unlike any other communication technology, Power Line Communications (PLC) is a technology whereby a sender modulates the data to be sent, injects it onto medium, and the receiver demodulates the data to read it. The basic difference is that in PLC no extra wiring is needed. Considering the ubiquity of power lines, it implies that with PLC, virtually all line-powered devices can be controlled or monitored. Generally, PLC uses the same electric cables for the purpose of power delivery and communication.…

    • 1081 Words
    • 5 Pages
    Great Essays
  • Great Essays

    If every signal has its own frequency range, then multiple signals can be transmitted simultaneously over a single channel transmit multiple signals simultaneously over a single channel at different frequency ranges. • Reduced antenna…

    • 2103 Words
    • 9 Pages
    Great Essays