You are here: Home Knowledge Base Application Notes Slot Loaded Circular Patch Folder
Personal tools
Sections

Slot Loaded Circular Patch Antenna

A slot loaded circular patch antenna is simulated in FEKO to show the resulting decrease of the resonant frequency

Here a slot loaded circular patch antenna is considered to show how a pin fed patch antenna is simulated in FEKO.  It is shown in [1] that by loading a circular patch with a number of slots, the resonant frequency of the antenna can be decreased.  That is the required size for a certain resonant frequency is reduced.  Figure 1 shows the simulation model of such a slot loaded circular patch (pin feed in red) which reduces the resonant frequency from 7.7GHz to 5.17GHz.  The patch resides on a dielectric with εr = 2.6 which is modeled with a Green function layer.

Figure 1:  Simulation model of slot loaded circular patch antenna.
Pin feed shown in red.
 Slot loaded circular patch


Figure 2 compares the reflection coefficient at the feed point of the slot loaded antenna to that of the unloaded circular patch. 

Figure 2:  Resonant frequencies of the slot loaded and
unloaded antennas are compared.
 Slot Loaded Circular Patch S11

 

As shown in [1] the resonant frequency is reduced substantially and also the -10dB bandwidth is reduced.


References

[1] C.B. Ravipati, "Compact Circular Microstrip Antenna for Conical Patterns", Antennas and Propagation Society International Symposium, 2004.