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

 

Experiment 1: Measured Result

Experiment 1: Measured Result

 

Experiment 2: Land Pattern Image

Experiment 2: Land Pattern Image

 

Experiment 2: Return Loss & Matching Circuits

Experiment 2: Return Loss & Matching Circuits

 

Experiment 2: Radiation Pattern @ 2.5GHz

 

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