2500AT43A0100 Frequency tuning
Abstract
- Experiment 1:
To shift up /down the center frequency of 2500AT43A0100 by changing the land pattern with no matching circuits (Fo @ 2.65GHz) - Experiment 2:
To tune down the center frequency (to 2.5GHz) of 2500AT43A0100 soldered on the initial land pattern by matching circuits.
Experiment 1: Land Pattern Comparison
![Experiment 1: Land Pattern Comparison](/images/technotes/2500AT43A0100-image1.gif)
Experiment 1: Measured Result
![Experiment 1: Measured Result](/images/technotes/2500AT43A0100-image2.gif)
Experiment 2: Land Pattern Image
![Experiment 2: Land Pattern Image](/images/technotes/2500AT43A0100-image3.gif)
Experiment 2: Return Loss & Matching Circuits
![Experiment 2: Return Loss & Matching Circuits](/images/technotes/2500AT43A0100-image4.gif)
Experiment 2: Radiation Pattern @ 2.5GHz
![Experiment 2: Radiation Pattern @ 2.5GHz](/images/technotes/2500AT43A0100-image5.gif)
Summary
- Experiment 1:
The results show that the center frequency can be shifted up/down by about 50MHz by changing the antenna land pattern. - Experiment 2:
The center frequency can also be shifted down to 2.5GHz by the matching circuit (shown as the page 5).
Note: Combining experiments 1 & 2 can give the designer the desired Fo