Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Size of ground plane on p@tch antenna performance

Status
Not open for further replies.

svarun

Full Member level 5
Joined
Mar 31, 2002
Messages
271
Helped
22
Reputation
44
Reaction score
15
Trophy points
1,298
Location
In the warm company of God's most exquisite creati
Activity points
2,746
size of ground plane of antenna

Hi all,
Has anyone studied the effect of the size of ground plane on the radiation pattern of a microstrip p@tch antenna ? Typically how big a ground plane is good enough ? Thanks for your time.

-Arun
 

dowjones

Full Member level 2
Joined
Nov 21, 2001
Messages
122
Helped
7
Reputation
14
Reaction score
1
Trophy points
1,298
Activity points
1,352
hello svarun,

your question says "... how big is good enough?" and I ask you, good enough for what?. Be aware that the ground plane size gives you an additional degree of freedom, and making it larger or smaller you can control the antenna beamwidth, and therefore the directivity.

If you want a directive antenna with low back radiation you need a large plane (I am using now 3lambda for that, and the back radiation is about 30dB).

On the other hand if you try a wide beamwidth antenna, then making the ground plane smaller, you can control it (be aware that if you make it too small the input impedance will be also affected).

rgdz
 

    svarun

    Points: 2
    Helpful Answer Positive Rating

svarun

Full Member level 5
Joined
Mar 31, 2002
Messages
271
Helped
22
Reputation
44
Reaction score
15
Trophy points
1,298
Location
In the warm company of God's most exquisite creati
Activity points
2,746
Hi Dowjones,
You answered my question in your reply !!. What I had in mind was how big should the ground plane be so that the actual pattern differs very little from the pattern for the infinite ground plane case. By the way do you have any reference to any paper which does study the effect of ground plane on antenna radiation pattern, either theory based or experiment based. Thanks for your time.

-svarun
 

Element7k

Advanced Member level 1
Joined
May 7, 2003
Messages
434
Helped
26
Reputation
52
Reaction score
19
Trophy points
1,298
Location
TherealLapland
Activity points
4,278
Here is one for you svarun.

Element7k

svarun said:
Hi Dowjones,
You answered my question in your reply !!. What I had in mind was how big should the ground plane be so that the actual pattern differs very little from the pattern for the infinite ground plane case. By the way do you have any reference to any paper which does study the effect of ground plane on antenna radiation pattern, either theory based or experiment based. Thanks for your time.

-svarun
 

    svarun

    Points: 2
    Helpful Answer Positive Rating

dowjones

Full Member level 2
Joined
Nov 21, 2001
Messages
122
Helped
7
Reputation
14
Reaction score
1
Trophy points
1,298
Activity points
1,352
Svarun,

a good paper on the ground plane topic:

IEEE Trans AP 51 no. 3 march 2003 pp 478-482. "Improving radiation Pattern Distortion of a Patch antenna having a finite ground plane" by T. Namiki, Y. Murayama and K. Ito.

regards
 

    V

    Points: 2
    Helpful Answer Positive Rating

fantomf4

Full Member level 2
Joined
Aug 1, 2002
Messages
133
Helped
7
Reputation
14
Reaction score
2
Trophy points
1,298
Location
Australia
Activity points
951
Size of ground depends of type of simulator your are using, MoM needs more than FEM.
 

a_aziz

Member level 3
Joined
Jan 4, 2005
Messages
66
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
548
hi
the size of groun plane in microstrip antenna
relate to size of radiated patch.however common greater than 2 order of this size.for giving more details refer to the book of microstrip antenna from D.M.Pozar
 

dowjones

Full Member level 2
Joined
Nov 21, 2001
Messages
122
Helped
7
Reputation
14
Reaction score
1
Trophy points
1,298
Activity points
1,352
Svarun,

a few more references on this subject

regards



S. A. Bokhari, J.R. Mosig, F.E. Gardiol (1992). Radiation Pattern computation of Microstrip Antennas on Finite Size Ground Planes. IEE Proceedings - H, 139(3), 278-286.

M. Ando, T. Murasaki, Y. Inasawa, M. Sato, K. Natsuhara (0). GTD Pattern Analysis of Antennas on a Finite Ground Plane by Using Modified Edge Representation.

S. Cui, D. Fang (1997). Analysis of the Diffraction Coefficients of Corrugated Surfaces with the Use of a Numerical GTD Method. Microwave and Optical Technology Letters, 15(5), 297-303.

R. Marg, I. Schön, A.F. Jacob (2000). Finite Ground Plane Effects on the Radiation Pattern of Small Microstrip Arrays. IEE Proceedings Microwaves Antennas and Propagation, 147(2), 139-143.

S. Noghanian, L. Shafai (1998). Control of Microstrip Antenna Radiation Characteristics by Ground Plane Size and Shape. IEE Proceedings Microwaves Antennas and Propagation, 145(3), 207-212.

Z. Ying, P. S. Kildal (1996). Improvements of Dipole, Helix, Spiral, Microstrip Patch and Aperture Antennas with Ground Planes by Using Corrugated Soft Surfaces. IEE Proceedings Microwaves Antennas and Propagation, 143(3), 244-248.
 

abti

Junior Member level 1
Joined
Jul 7, 2004
Messages
19
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
195
Hi,

Other than the size of the ground plane (and array arrangement ) is there any other parameter we can manipulate to get a narrow beamwidth or at least to fix a distortion of farfield radiation patern ?

Thank you for your help.

regards,
abti
 

jampter

Newbie level 5
Joined
Dec 5, 2003
Messages
9
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
84
does anyone do some research on the imput impendance of finit substate micrpstrip antenna?

I use PMCHE+EFIE and Matrix Pencil method to calculate the S11 of an MS Antenna, but the frequence is often lower than measure. Is that True?
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top