ON Semiconductor AND9670/D Quick Start Manual page 7

The second generally used antenna mounting position is in vertical plane, in following referred as V−plane, whereby the whip
antenna is pointing to the ceiling and perpendicular to the shield and ground plane. To mount the whip antenna vertically on
the RFID shield, an additional right angle adaptor [4] has been used as shown in picture below.
To get flexible antenna position, a RF coaxial cable can be used to connect the antenna far away from the RFID shield, for
example a RF cable length of 1 m with the attenuation of about ~ 0.5 dB in UHF range can be used without a significant RF
power degradation.
AND9670/D
Figure 9. Whip Antenna in Vertical Mounting Position
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