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I am studying patch antennas for mobile communication (technology.)

I have found some examples of them but without explanation.

Maybe can someone explain to me the difference of examples from this picture?

enter image description here

my thoughts:

c) Is a patch which is connected with a waveguide (or linear antenna.)

f) With a folded slot

But I am not sure, that' s why I need your help.

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  • \$\begingroup\$ All of these are PIFA, a type of patch antenna. \$\endgroup\$ – Marcus Müller Feb 16 at 12:38
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All these are not microstrip patch antenna but all these antennas are mostly fed with 50 ohms coaxial line (or SMA connector).

  1. Option-C : This is inverted Wire antenna.
  2. Option-d : This is Inverted-F wire antenna
  3. Option-e : This is microstrip version of inverted-F antenna also called PIFA (Planar inverted F-antenna)
  4. Option-f : It's also microstrip PIFA antenna with a slot cut on this. Slot is used to generate another resonance frequency (multi-band antenna)
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