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Rectangular Microstrip (Patch) Antennas help

 
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adel200
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Joined: 22 Oct 2011
Posts: 2
Location: Malaysia
PostPosted: Sat Oct 22, 2011 7:29 am    Post subject: Rectangular Microstrip (Patch) Antennas help Reply with quote
hey
i am new in designing antenna. i design Rectangular Microstrip (Patch) Antennas at 900MHz but i have problem with size.any one has idea to help me to decrease the size or anther type of antenna easy to get small size

thanx
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bigSteve
Antenna Wizard


Joined: 14 Mar 2009
Posts: 265
PostPosted: Sun Oct 23, 2011 6:17 pm    Post subject: Reply with quote
You can use a high-dielectric substrate. That is, if you increase the substrate from epsilon=1 to epsilon=4, the size required would be half.

If you have a ground plane that is already a half-wavelength in size, you can shrink the patch to a quarter-wavelength using the PIFA design:
http://www.antenna-theory.com/antennas/patches/pifa.php
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adel200
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Joined: 22 Oct 2011
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Location: Malaysia
PostPosted: Sun Oct 23, 2011 10:43 pm    Post subject: Reply with quote
bigSteve wrote:
You can use a high-dielectric substrate. That is, if you increase the substrate from epsilon=1 to epsilon=4, the size required would be half.

If you have a ground plane that is already a half-wavelength in size, you can shrink the patch to a quarter-wavelength using the PIFA design:
http://www.antenna-theory.com/antennas/patches/pifa.php




ok thanx i will try this first
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raghavkap
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Joined: 15 Apr 2014
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PostPosted: Thu Apr 17, 2014 8:43 am    Post subject: Microstrip Patch Antenna Calculator Reply with quote
You can calculate the Lenght and Width of a patch antenna using this calculator - Specify the Height of the substrate, dielectric constant and the frequency.

http://www.everythingrf.com/rf-calculators/microstrip-patch-antenna-calculator
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