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Table 1 Load and standing wave ratio bridge voltage of various antennas

From: The Village Telco project: a reliable and practical wireless mesh telephony infrastructure

Antenna

SWR bridge output (VDC)

50 ohms dummy

0.5

Short circuit

1.3

Off the shelf router antenna

0.5

17 mm PCB mono-pole

0.5

20 mm PCB mono-pole

0.7

34 mm PCB dipole

1.3

64 mm PCB bi-quad dual loop

1.3

68 mm PCB bi-quad dual loop

1.4

72 mm PCB bi-quad dual loop

1.5

Wire bi-quad dual loop

0.8

Wire mono-pole

0.6