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Antenna Bandwidth Expansion Guideline |
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Method for bandwidth expansion for chip antennas:
2450AT18B100 Bandwidth with original Eval board: 100MHz
Layout with additional "elbow" to GND:
(A) Evaluation board
(B) Detailed land pattern with dimensions (+ 2 variables)
Return loss measurement (variables a and b dependent)
| Bandwidth Summary with PIFA type. Table-1 |
| Case |
New Bandwidth ( S11 < -10dB) |
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 |
230 MHz |
2.32 ~ 2.55GHz |
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