Microstrip Antenna Seminar Presentation

MICROSTRIP ANTENNA

• PREPARED BY:AALAY KAPADIA (09BEC025)KETAN LUKHI (09BEC028)JATIN JANSARI (09BEC023)

25/10/2022 1ANTENNA THEORY PRESENTATION

GUIDED BY:MISS AARTI GEHANI

TOPICSINTRODUCTION AND PARAMETERSADVANTAGES AND DISADVANTAGESBASIC PRINCIPLE OPERATIONFIELD PATTERNFREQUENCY OF OPERATIONFEEDING METHODS FOR PATCH MICRO STRIP ANTENNAFRINGING FIELD EFFECTVIDEO SIMULATION OF TRANSIENT FIELDS UNDER A MICRO STRIP ANTENNAPLANAR INVERTED-F ANTENNA(P.I.F.A.)VIDEO INTRODUCTION AND ANALYSIS OF PATCH/MICRO- STRIP ANTENNA

25/10/2022 2Antenna Theory Presentation

INTRODUCTION ,PARAMETERS AND FIELD OF MICRO STRIP ANTENNA

WHY IT IS CALLED MICROSTRIP ANTENNA?

CONSTRUCTION AN VARIOUS ITS PARAMETERS

25/10/2022 Antenna Theory Presentation 3

ADVANTAGES • THEY CAN BE PRINTED DIRECTLY ONTO A CIRCUIT BOARD. [1]

• PATCH ANTENNAS ARE LOW COST, HAVE A LOW PROFILE AND ARE EASILY FABRICATED. [1]

• EASY TO FEED (COAXIAL CABLE, MICROSTRIP LINE)• LIGHT WEIGHT• EASY TO USE IN ARRAY• PROVIDES DIRECTIVE GAIN OF 6-8DBI. [3]• IMPEDANCE MATCHING AND PHASE ADJUSTMENT CAN BE PERFORMED WITH PRINTED MICROSTRIP FEED STRUCTURES. [3]

• IT HAS ABILITY OF POLARIZATION DIVERSITY. [3]


DISADVANTAGES• TYPICALLY LOW BANDWIDTH (REQUIRES DIFFERENT TECHNIQUES TO IMPROVE BANDWIDTH)

• LOW EFFICIENCY AS COMPARED TO OTHER TYPE OF ANTENNAS


BASIC OPERATION• THERE ARE TWO MODELS TO EXPLAIN BASIC OPERATION OF MICROSTRIP ANTENNA.– 1. TRANSMISSION LINE MODEL

– 2. CAVITY MODEL• INPUT IMPEDANCE AND MATCHING


FIELD OF MICRO STRIP ANTENNA

THE FIELDS OF THE MICROSTRIP ANTENNA ARE PLOTTED IN FIGURE 2 FOR W=L=0.5 .


FIELD OF MICRO STRIP ANTENNA


FIELD PATTERNS


FREQUENCY OF OPERATION• DEPENDS ON LENGTH OF ANTENNA• ALSO ON DIE ELECTRIC SUBSTRATE• BANDWIDTH


FEEDING METHODS• THERE ARE TOTAL 4 FEEDING METHODS FOR MICROSTRIP ANTENNA:

• 1. INSET FEED• 2. COAXIAL FEED• 3. PROXIMITY (EMC) COUPLING• 4. APERTURE COUPLED PATCH


FEEDING METHODS


INSET FEED

COAXIAL FEED

PROXIMITY FEED

APERTURE COUPLED PATCH

FRINGING FIELDS FOR MICROSTRIP ANTENNAS

CONSIDER A SQUARE PATCH ANTENNA FED AT THE END AS BEFORE IN FIGURE 1A. ASSUME THE SUBSTRATE IS AIR (OR STYROFOAM, WITH A PERMITTIVITY EQUAL TO 1), AND THAT L=W=1.5 METERS, SO THAT THE PATCH IS TO RESONATE AT 100 MHZ. THE HEIGHT H IS TAKEN TO BE 3 CM. NOTE THAT MICROSTRIPS ARE USUALLY MADE FOR HIGHER FREQUENCIES, SO THAT THEY ARE MUCH SMALLER IN PRACTICE. WHEN MATCHED TO A 200 OHM LOAD, THE MAGNITUDE OF S11 IS SHOWN IN FIGURE 3.


http://www.antenna-theory.com/definitions/sparameters.php


VIDEO SIMULATION OF TRANSIENT FIELDS UNDER A MICRO STRIP ANTENNA

Antenna-Theory.com Presents an FDTD Simulation of the Fields Under a Patch Antenna - Shortcut.lnk


PLANAR INVERTED-F ANTENNA(P.I.F.A.)

Antenna-Theory.com Presents The PIFA - Shortcut.lnk


VIDEO INTRODUCTION AND ANALYSIS

OF PATCH/MICRO- STRIP ANTENNA

Antenna-Theory.com Presents Analysis of the Patch Antenna - Shortcut.lnk

Microstrip Antenna Seminar Presentation

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