Electromagnetic in antenna design (Introduction to Electromagnetic sources, Radiation, Electric field, Magnetic Field, Polarization Computation Electromagnetic) @GVIET

Introduction to Electromagnetic How Electromagnetic waves radiate Definition of Electromagnetic Application of Electromagnetic Polarization and electric field magnetic field computation electromagnetic

Interdisciplinary Research (The trend of an era) Nitin Saluja Antenna Design

Presentation on Interdisciplinary Research Electronics and computer engineering in Environment agriculture health and biomedical

Chitkara univ fdp program on interdisciplinary research from Nitin Saluja

Resonant and Non-Resonant Antenna

Resonant and NonResonant Antenna

Question 1. If we need to find out the length of antenna needed for the frequency 2.4 GHz. How we find out length.

Since antenna is resonating type. We always find wavelength first. 

 lambda= Speed of light / Frequency

so for 2.4 GHz lambda=3 X 10^8/ 2.4 X 10 ^9 m

so we decide our antenna to have length lambda/2. So this antenna resonates at 2.4 GHz but if frequency other then 2.4GHz falls on this type of antenna, it will behave merely like a piece of metal.

So resonating antennas are antenna having length in terms of wavelength. 

Question 2. Since ionosphere reflects back the signal so frequency needs to change, Then how a single antenna can be used to receive multiple frequencies if it is resonant antenna since it will work for single frequency as described above.

 Non resonant type of antenna is used. In non-resonant type of antenna the length is not deciding factor for the frequency for which my antenna works. It is also called traveling wave type of antenna. While resonant antenna is dependent on standing waves produced. The difference between Standing wave and traveling wave antenna will be discussed in next article. 

So two things to keep in mind, Resonant antenna length is dependent on frequency and always defined in terms of wavelength. while resonant type of antenna are traveling wave antenna for which frequency of operation is independent of length.

National Conference on Recent Trends in Electronics and Telecommunication Design

Call for papers

Department of Electronics and Communication Engineering at Lingayas University, Faridabad is organizing a National Conference on Recent Trends in Electronics and Telecommunication Design (NCRTETD 2013).

Paper can be sent at ncrtetd@gmail.com

for any query contact to nitin.saluja@yahoo.co.in

Nitin Saluja

Convener 

NCRTETD 2013

Contact Info

Nitin Saluja
Lingayas University
Thapar University
Sirsa

https://sites.google.com/site/nitinsaluja1/contact

Contact

Address-
Personal- Mobile No- +91-9416480398

Mail: nitin.saluja@yahoo.co.in
        nitinsalujayanky@gmail.com

Official
Electronics and Communication Engineering Department,
Room No-428
Main Block

Lingaya’s University Campus

Nachauli, Jasana Road, Old Faridabad
Faridabad-121002
Phone: +91-129-2598200,01,02,03,04,05, Extn-304

PIFA advanced

PIFA antenna

Mobile Antenna

PIFA antenna is used in Mobile

PIFA stands for planar Inverted F antennas

PIFA falls under category of Microstrip Patch antenna

Microstrip Patch Antenna has different parts

Patch--Metallic

Substrate-- Dielectric material

Ground-- Metallic

Patch is kind of resonator which resonates at definite frequency

structure is like Patch let us say 0.05 mm thickness, Below patch there would be substrate kind of PCB let us say 1.6 mm thick, Below substrate there would be metal called ground plane now you can imagine the structure, it can be imagined as two layer PCB with metal at both ends. one end metal can be etched out such that it has definite length and width and is called patch and other end may or may not be etched called ground plane. Antenna is fed through feed such that among two wire of the cable one touches ground and other patch


here in PIFA shorting pin is added between patch and ground plane and advantages of it will be given in next post