This article is a practical guide on how to feed a microstrip patch antenna on an infinite ground using an edge feed.
As an example, we will have a look at a microstrip patch antenna fed by a coaxial cable via an SMA connector connected to a feed line.
The front and side (section) view of the physical microstrip patch antenna for illustration purposes. Dimensions not to scale.
The patch antenna is modelled using an infinite ground plane. A good approximation of a microstrip patch antenna (fed using a feed line) is to use a microstrip port where the connector would have been located. A voltage source is then added to the microstrip port to excite the patch antenna.
An example of a micostrip patch antenna on an infinite substrate in CADFEKO.
To excite the microstrip antenna:
- Select the edge at the end of the feed line.
The edge at the end of the feed line is selected.
- Add a microstrip port to the selected edge.
The Create Microstrip Port dialog.
A microstrip port is added to the selected edge.
- Add a voltage source to the microstrip port.
A voltage source is added to the microstrip port.
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