Modeling, Simulation and Analysis Of UWB(Ultra Wid e Band) of Microstrip Patch

Antenna

Presented By:- Students of EC Final year

Prerna Chaturvedi Rajshree Kesherwani Nidhi Pandey Akash Pandey Under the Guidance of : Mr. Vivek Singh

OUTLINE

IntroductionBasic Principles of Microstrip Patch antennasUWB(ultra wide band )Literary surveyObjective ReferencesAdvantagesDisadvantagesApplicationThank you

What is micro-strip patch antenna?

•A micro-strip patch antenna consists of a radiating patch on one side of a dielectric substrate which has a ground plane on the other side .•It was invented by Bob Munson in 1972 (but earlier work by Dechamts goes back to 1953)

Basic principles of operation

• The patch acts approximately as a resonant cavity (short circuit walls on top and bottom, open-circuit walls on the sides).

• In a cavity only certain modes are allowed to exist, at different resonant frequencies.

• If the antenna is excited at the resonant frequency, a strong field is setup inside the cavity, and the strong current on the(bottom)surface of the patch. This produce significant radiation (a good antenna).

Structures of Micro strip Antenna

UWB (Ultra Wide Band)

• It is a Radio technology that modulates impulse based waveforms instead of continuous carrier waves.

Characteristics:• Its frequency ranges from 3.1Ghz to 10Ghz. Very high bandwidth within

short range (200Mbps within 10m).• Very high data rates possible -500 Mbps can be achieved at distances of 10 feet under current regulations.• Extremely low transmission energy ( less than 1mW).• Frequency diversity with minimal hardware modifications.• Geolocation/Positioning – Sub-centimeter resolution using pulse leading edge detection – passes through building blocks, walls, etc. (LOS not required)

Literary Survey

1. Modern wireless communication systems need antennas with further bandwidth and smaller size. Fractals have unique properties such as self-similarity and space filling. The concepts of fractals can be applied to the design of low-profile and multi-band antennas. In this article, a super wideband antenna by applying a new fractal geometry to a wire monopole antenna is presented. The modelling and simulation are performed using SuperNEC electromagnetic simulator. The results show that the proposed antenna can be used for frequency range 10–40 GHz, i.e. it is a super wideband antenna with 30 GHz bandwidth. Radiation pattern and gain are also studied and show a good agreement over the bandwidth.ref[1].

2. A microstrip‑fed ultra wideband antenna with dual band rejection characteristics is investigated. The anten‑na has the same shape between radiation patch and ground plane, and is fabricated on a Rogers RT/duroid 5880 substrate with an overall size of 22×31.85×0.508 mm3. To generate two notched frequency bands, a Unshaped parasitic element on the back of the patch is utilized. The two notched bands can be controlled by adjusting the size of the parasitic element. The measured results show that the proposed antenna has an im‑pedance bandwidth of 3.0 to 11.7 GHz for S11 <−10 dB, expects two eliminated frequency bands 5.08~5.96 GHz for wireless local area network and 8.71~10.25 GHz for X-Bands.ref[2].

1. This article presents the design of ultra wide band (UWB) square shape fractal antenna with matching strip. The impedance matching of this proposed antenna is achieved using the metal strip in ground plane at angle 60from the centre of the patch. The experimental results of this antenna exhibit the ultra wide band characteristics from 2.355 GHz to 15.0 GHz corresponding to 145.722% impedance bandwidth This antenna can be useful for transmission of high data rate wireless communications, medical imaging and other UWB applications.ref[3].

2. A novel multi-band planar monopole antenna for various wireless communicationapplications is presented. The base of the proposed antenna is an ellipse-shapedpatch that covers the ultra wideband (UWB) frequency range. To create extrafrequency bands below the UWB band, two narrow quarter-wavelength strips areattached to the high concentrated current area of the patch. Two notched bands,centred at 3.5 GHz WiMAX and 5.5 GHz WLAN, are also created by similarlyintegrating strips to the radiation patch. The proposed multi-band antenna has asmall size of 30 × 30 mm2 and covers GSM (1.77–1.84 GHz), Bluetooth (2.385–2.49 GHz) and UWB (3.1–10.6 GHz) bands. Simulated and measured results are presented and compared, which show that the antenna has omnidirectional and stable radiation patterns across the entire pass band. Furthermore, good group delay and transmission characteristics can be achieved in the UWB band.ref[4].

OBJECTIVE:

Modeling , Simulation and Analysis of UWB(Ultra Wide Band) For Micro

strip Patch Antenna

References[1]. Abolfazl Azari (2012): A new ultra-wideband fractal monopole antenna, International Journal of Electronics, 99:2, 295-303.[2]. Lei Chang, Cheng Liao, Ling.lu Chen & Xuan Zheng (2012) Compact

Planar Ultra-wideband Antenna with Wireless Local Area Network and X Band Notches, IETE Technical Review, 29:1, 76-79.

[3]. Raj Kumar & Ashish G. Kokate (2013) On the design of square shape fractal antenna with matching strip for UWB applications, International Journal of Electronics, 100:7,881-889.

[4]. Tong Li, Huiqing Zhai, Long Li & Changhong Liang (2014) Monopole antenna for GSM, Bluetooth, and UWB applications with dual band-notched characteristics, Journal of Electromagnetic Waves and Applications, 28:14, 1777-1785.

ADVANTAGES

• Low profile and lightweight, t << 0.03 0 and it is usually 𝜆made from perfectly electrically conducting (PEC).

• They permit both linear and circular polarization.• Integration with other circuit is: It is simple to completely

integrate a micro strip patch antenna on a printed-circuit board (PCB) with other planar circuit is.

• Easy to fabricate (use etching and photolithography).• Versatility: a microstrip patch antenna is very versatile in

terms of impedance, resonant frequency, radiation pattern, polarization and operating mode

DISADVANTAGE

• Sensitive to environment conditions like temperature and humidity.

• Low gain and power handling capability.• High Dielectric and conductor losses.• High quality factor.• Poor polarization efficiency.

APPLICATIONS

• Mobile communication.• Satellite communication.• Global positioning system.• Direct broadcast satellite system.• In medical field.