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Antenna Bandwith Expansion Guide

Antenna Bandwith Expansion PDF

Method for bandwidth expansion for chip antennas:

method-for-bandwidth-expansion-for-chip-antennas

Layout with additional "elbow" to GND:

layout-with-additional-elbow-to-gnd

(B) Detailed land pattern with dimensions (+ 2 variables)

detailed-land-pattern-with-dimensions

Return loss measurement (variables a and b dependent)

return-loss-measurement-variables-a-and-b-dependent

Bandwidth Summary with PIFA type. Table-1

Case New Bandwidth (S11) Frequency Range
1 = 5mm, b=3.25mm, h-direction_1 PIFA 220 MHZ 2.32 ~ 2.54GHZ
a=3mm, b=2.25mm h-direction_3 PIFA 230MHz 2.32 ~ 2.55GHz