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Off-board antenna

Figure 2 shows an off-board antenna example. The pros and cons are then summarized.

Figure 2.

Off-board antenna

Pros

●

Antenna may be placed closer to the outside of the device

●

Larger antenna may be designed, possibly leading to better read ranges

Cons

●

Impedance matching, and connections plus wires make the design optimization more

critical

Daughterboard antenna

Figure 3 shows a daughterboard antenna example. The pros and cons are then

summarized.

Figure 3.

Daughterboard antenna

Pros

●

Accommodates designs with space constraints

Cons

●

Impedance matching and connections make the design optimization more critical

●

Because there may be very little space between the antenna and the board, the read

ranges may be limited

ai15979

ai15981