Register to reply

Enhanching directivity of a microstrip patch antenna

by tensorbundle
Tags: antenna, directivity, enhanching, microstrip, patch
Share this thread:
tensorbundle
#1
Dec4-10, 12:37 AM
P: 15
Antenna theory is quite new to me and I found in constantine Balanis's book that there's a relationship between maximum directivity and effective area of an antenna-if we increase effective area, directivity will also increase. The picture of antenna author used to derive the equation was a horn antenna. Is the equation valid for patch antenna?
I want to know another thing-- as patch antenna radiates signal from edges not through the surface, then which area I would consider as effective area for patch antenna?- is it the edge area or surface area of metallic plate?
My aim is to enhance directivity of a patch antenna. so, plz provide me some ideas to achieve high directivity.
Thanks
Phys.Org News Partner Engineering news on Phys.org
An innovative system anticipates driver fatigue in the vehicle to prevent accidents
Squink personal factory aims to make circuit prototyping easy
Catching grease to cut grill pollution
marcusl
#2
Dec4-10, 09:02 PM
Sci Advisor
PF Gold
P: 2,056
The metallic area is approximately the value to use. Since the dimensions must be matched to the wavelength of the radiation, you aren't able to arbitrarily change the area. To change directivity, you need to do something else--an array of properly phased patches, for instance.
tensorbundle
#3
Dec4-10, 10:56 PM
P: 15
a lot of thanks for the reply.
you aren't able to arbitrarily change the area. To change directivity
That's a very good point .
you need to do something else--an array of properly phased patches
Actually I'm designing a patch antenna for my project. An array of patches would make my antenna size many times larger. I don't want to sacrifice miniaturization for the sake of directivity. Perhaps you are an expert in RF field. can you tell me any other possible way to increase directivity without making the patch antenna bigger?
Thanks again for your cooperation

marcusl
#4
Dec5-10, 09:43 AM
Sci Advisor
PF Gold
P: 2,056
Enhanching directivity of a microstrip patch antenna

Sorry, I don't know. Maybe someone who knows patch antennas can answer this question.


Register to reply

Related Discussions
Microstrip antenna Electrical Engineering 1
Calculating antenna directivity Engineering, Comp Sci, & Technology Homework 3
Directivity of array of antennas Engineering, Comp Sci, & Technology Homework 1
Special pattern in the directivity of loudspeaker Mechanical Engineering 4
Acoustics - directivity Mechanical Engineering 5