Obstructed Rf Feed And/Or Ground Pads For The Main And Gps Antennas - Nokia RH-3 Series Troubleshooting - Antenna

CCS Technical Documentation
Figure 10: Top views of internal antenna (RH-3 at left; RH-17 at right)
Installing the RH-17 antenna in the RH-3/RH-3P phone will not be compliant with
Nokia's FCC submission, as RH-17 is a single-band antenna (no PCS) and it doesn't have
a GPS antenna.
If the wrong antenna is installed, install the correct one.
If the slot in the radiator has a significantly different shape, then the correct internal
antenna must be installed. Be aware that the shape of the slot can vary slightly. The
length of the horizontal slot and the opening of the vertical slot can vary by few millime-
ters, because the antennas are tuned for each batch of plastic frames. If there is any
other obvious damage to the radiator (dents, corrosion), then the antenna should be
replaced. If the pin gets stuck or has excessive friction in the plastic tube/guiding fea-
ture, then the spring will not work properly, and the antenna should be replaced.

Obstructed RF Feed and/or Ground Pads for the Main and GPS Antennas

Figure 11: PWB layout of RF feed and ground pads, and bottom antenna clip
If the any of RF feed or ground pins are obstructed, removed, or covered, then the RF pin
will not touch the PWB and the antenna performance will degrade. See the antenna per-
Issue 1 06/2003
Nokia Corporation
Troubleshooting — Antenna
Confidential
RH-3
Page 11